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Portland Harbour - Sandsfoot Castle (Beach) (Dorset) weather

Here are our top tips to keep you, your friends and family safe at the beach with links to Royal National Lifeboat Institution (RNLI) and Met Office advice.



Forecast days

Sunny intervals changing to light showers by lunchtime.
Beach safety today
Use caution in the sea. Waves can be bigger or stronger than you expect, strong rips likely, strong wind may blow you off course
  • • unsafe for novice surfers
  • • paddle boarding/kayaking not recommended at any level

Tide: Next high tide (4.0m) at

Sunrise iconSunrise:
Sunset iconSunset:
M UV
L Pollution

    7 day forecast for Portland Harbour - Sandsfoot Castle (Beach)

    Today (11 September 2025)
    Time
    09:00
    10:00
    11:00
    12:00
    13:00
    14:00
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Sunny day Sunny intervals Sunny intervals Light shower day Light shower day Light shower day Light shower day Light shower day Light shower day Sunny intervals Partly cloudy night Partly cloudy night Partly cloudy night Clear night Partly cloudy night
    Chance of precipitation
    10%
    30%
    50%
    60%
    80%
    80%
    70%
    70%
    60%
    50%
    40%
    30%
    30%
    10%
    10%
    Temperature
    16°
    17°
    17°
    17°
    17°
    17°
    17°
    17°
    16°
    16°
    15°
    15°
    15°
    14°
    14°
    Feels like temperature (°C)
    12°
    13°
    13°
    13°
    13°
    13°
    12°
    12°
    12°
    12°
    11°
    11°
    11°
    10°
    10°
    Wind direction and speed
    WSW
    19
    WSW
    19
    WSW
    20
    WSW
    20
    WSW
    20
    WSW
    20
    W
    21
    W
    21
    WSW
    21
    WSW
    21
    WSW
    22
    WSW
    22
    W
    21
    W
    21
    WSW
    22
    Wind gust (mph)
    36
    37
    38
    39
    41
    42
    42
    41
    43
    41
    39
    39
    38
    39
    39
    Visibility
    VG
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    Humidity
    66%
    65%
    61%
    59%
    59%
    59%
    57%
    57%
    60%
    64%
    65%
    65%
    67%
    68%
    67%
    UV 2 3 4 5 5 5 3 2 1 1 1 - - - -
    Wind direction and speed
    17
    20
    19
    19
    18
    Height of waves offshore (m)
    1.5
    1.5
    1.9
    1.9
    1.8
    Period of waves offshore (s)
    6
    6
    7
    7
    8
    Direction of waves offshore
    Friday (12 September 2025)
    Time
    00:00
    01:00
    02:00
    03:00
    04:00
    05:00
    06:00
    07:00
    08:00
    09:00
    10:00
    11:00
    12:00
    13:00
    14:00
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Clear night Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Light shower day Light shower day Light shower day Light shower day Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Light shower night Light shower night Heavy shower night Heavy shower night
    Chance of precipitation
    10%
    10%
    10%
    10%
    10%
    <5%
    10%
    10%
    10%
    20%
    20%
    40%
    60%
    60%
    50%
    60%
    40%
    40%
    40%
    40%
    60%
    80%
    80%
    90%
    Temperature (°C)
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    15°
    16°
    16°
    17°
    16°
    17°
    17°
    17°
    16°
    16°
    16°
    15°
    15°
    15°
    15°
    Feels like temperature (°C)
    10°
    10°
    10°
    10°
    10°
    10°
    10°
    11°
    11°
    12°
    12°
    13°
    13°
    13°
    13°
    13°
    13°
    12°
    12°
    12°
    12°
    12°
    12°
    11°
    Wind direction and speed (mph)
    WSW
    23
    W
    22
    W
    21
    W
    21
    WSW
    20
    W
    19
    W
    19
    W
    18
    WSW
    18
    WSW
    17
    WSW
    17
    WSW
    17
    WSW
    18
    WSW
    18
    SW
    19
    SW
    20
    SW
    20
    SW
    19
    SW
    18
    SW
    17
    SW
    18
    SW
    18
    SW
    19
    SW
    19
    Wind gust (mph)
    39
    38
    37
    36
    35
    35
    34
    32
    33
    33
    32
    34
    36
    36
    36
    36
    36
    35
    34
    33
    34
    36
    36
    34
    Visibility (description)
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    Humidity
    67%
    67%
    67%
    69%
    71%
    72%
    71%
    70%
    68%
    65%
    64%
    62%
    58%
    59%
    60%
    63%
    63%
    65%
    67%
    69%
    73%
    75%
    76%
    78%
    UV - - - - - - 1 1 1 2 3 4 5 5 4 2 2 1 1 1 - - - -
    Wind direction and speed (mph)
    16
    15
    14
    16
    17
    17
    14
    11
    Height of waves offshore (m)
    1.6
    1.6
    1.5
    1.4
    1.5
    1.7
    1.6
    1.4
    Period of waves offshore (s)
    7
    6
    6
    6
    6
    6
    7
    7
    Direction of waves offshore
    Saturday (13 September 2025)
    Time
    00:00
    01:00
    02:00
    03:00
    04:00
    05:00
    06:00
    07:00
    08:00
    09:00
    10:00
    11:00
    12:00
    13:00
    14:00
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Heavy shower night Heavy shower night Heavy shower night Light shower night Partly cloudy night Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Light shower day Sunny intervals Light shower day Light shower day Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Clear night Partly cloudy night Partly cloudy night Partly cloudy night
    Chance of precipitation
    80%
    90%
    90%
    60%
    50%
    50%
    50%
    30%
    30%
    30%
    30%
    40%
    50%
    50%
    60%
    50%
    50%
    40%
    30%
    20%
    20%
    20%
    20%
    20%
    Temperature (°C)
    15°
    15°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    15°
    15°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    15°
    15°
    15°
    Feels like temperature (°C)
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    12°
    12°
    12°
    12°
    13°
    13°
    12°
    13°
    13°
    13°
    12°
    12°
    12°
    12°
    12°
    Wind direction and speed (mph)
    SW
    19
    SW
    19
    SW
    18
    WSW
    17
    WSW
    16
    WSW
    17
    WSW
    17
    WSW
    16
    WSW
    17
    WSW
    17
    WSW
    18
    WSW
    18
    WSW
    18
    WSW
    18
    WSW
    18
    WSW
    18
    WSW
    17
    WSW
    17
    WSW
    18
    WSW
    18
    WSW
    16
    WSW
    16
    WSW
    16
    WSW
    16
    Wind gust (mph)
    36
    36
    35
    32
    32
    30
    31
    31
    32
    33
    33
    34
    34
    35
    36
    36
    36
    36
    34
    33
    32
    30
    30
    26
    Visibility (description)
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    Humidity
    80%
    82%
    83%
    82%
    79%
    78%
    77%
    77%
    73%
    67%
    63%
    58%
    57%
    58%
    58%
    62%
    63%
    61%
    63%
    67%
    68%
    68%
    69%
    69%
    UV - - - - - - 1 1 1 2 3 4 5 5 4 3 2 1 1 1 - - - -
    Wind direction and speed (mph)
    10
    10
    10
    14
    15
    17
    15
    14
    Height of waves offshore (m)
    1.5
    1.7
    1.6
    1.4
    1.3
    1.3
    1.5
    2.0
    Period of waves offshore (s)
    6
    6
    7
    7
    7
    6
    6
    7
    Direction of waves offshore
    Sunday (14 September 2025)
    Time
    00:00
    01:00
    02:00
    03:00
    04:00
    05:00
    06:00
    07:00
    08:00
    09:00
    10:00
    11:00
    12:00
    13:00
    14:00
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Partly cloudy night Cloudy Cloudy Cloudy Light rain Heavy rain Heavy rain Heavy rain Heavy rain Light rain Light rain Light rain Light rain Drizzle Light rain Light rain Light rain Light rain Light shower day Light shower night Light shower night Light shower night Partly cloudy night Partly cloudy night
    Chance of precipitation
    30%
    30%
    40%
    50%
    60%
    80%
    90%
    90%
    80%
    80%
    70%
    70%
    60%
    50%
    50%
    60%
    60%
    50%
    50%
    60%
    60%
    50%
    50%
    40%
    Temperature (°C)
    15°
    15°
    15°
    15°
    15°
    15°
    15°
    15°
    15°
    16°
    17°
    17°
    17°
    18°
    18°
    18°
    18°
    18°
    18°
    17°
    17°
    17°
    17°
    16°
    Feels like temperature (°C)
    12°
    13°
    13°
    13°
    13°
    13°
    13°
    12°
    12°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    12°
    12°
    11°
    11°
    11°
    Wind direction and speed (mph)
    WSW
    15
    SW
    14
    SW
    14
    SW
    14
    SSW
    14
    SSW
    15
    S
    16
    S
    17
    S
    18
    S
    20
    SSW
    21
    SSW
    22
    SSW
    23
    SSW
    23
    SSW
    24
    SW
    24
    SW
    25
    SW
    25
    SW
    26
    SW
    27
    SW
    27
    SW
    28
    SW
    28
    WSW
    28
    Wind gust (mph)
    25
    24
    25
    26
    25
    24
    24
    30
    32
    34
    36
    41
    43
    43
    43
    43
    42
    44
    44
    44
    48
    48
    47
    48
    Visibility (description)
    E
    E
    E
    VG
    VG
    VG
    M
    M
    M
    M
    M
    M
    M
    M
    G
    G
    G
    VG
    VG
    E
    E
    E
    E
    E
    Humidity
    75%
    77%
    81%
    84%
    87%
    89%
    92%
    93%
    93%
    95%
    95%
    95%
    96%
    93%
    93%
    93%
    91%
    88%
    86%
    87%
    86%
    84%
    82%
    82%
    UV - - - - - - 1 1 1 1 1 2 2 2 2 2 1 1 1 1 - - - -
    Wind direction and speed (mph)
    15
    Height of waves offshore (m)
    Period of waves offshore (s)
    Direction of waves offshore
    Monday (15 September 2025)
    Time
    00:00
    01:00
    02:00
    03:00
    04:00
    05:00
    06:00
    07:00
    08:00
    09:00
    10:00
    11:00
    12:00
    13:00
    14:00
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
    Chance of precipitation
    30%
    40%
    40%
    40%
    30%
    30%
    40%
    30%
    30%
    30%
    30%
    30%
    40%
    40%
    40%
    40%
    40%
    30%
    30%
    30%
    20%
    20%
    20%
    20%
    Temperature (°C)
    16°
    16°
    16°
    15°
    15°
    15°
    15°
    15°
    15°
    15°
    16°
    16°
    17°
    17°
    17°
    17°
    17°
    16°
    16°
    15°
    15°
    14°
    14°
    14°
    Feels like temperature (°C)
    11°
    11°
    10°
    10°
    10°
    10°
    10°
    10°
    10°
    11°
    11°
    12°
    12°
    13°
    13°
    13°
    13°
    13°
    12°
    12°
    12°
    12°
    11°
    11°
    Wind direction and speed (mph)
    WSW
    28
    WSW
    29
    WSW
    28
    WSW
    28
    WSW
    27
    WSW
    28
    WSW
    27
    W
    26
    W
    25
    W
    24
    W
    23
    W
    22
    W
    22
    W
    21
    WSW
    21
    WSW
    20
    WSW
    20
    WSW
    19
    W
    18
    W
    16
    W
    15
    W
    14
    W
    13
    W
    13
    Wind gust (mph)
    48
    50
    51
    52
    50
    49
    47
    46
    44
    44
    42
    41
    42
    41
    41
    41
    40
    38
    37
    35
    35
    34
    34
    31
    Visibility (description)
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    78%
    79%
    77%
    76%
    76%
    75%
    76%
    76%
    74%
    72%
    69%
    67%
    64%
    64%
    62%
    62%
    63%
    65%
    67%
    72%
    73%
    75%
    77%
    80%
    UV - - - - - - 1 1 1 2 3 4 4 5 4 3 2 1 1 1 - - - -
    Wind direction and speed (mph)
    Height of waves offshore (m)
    Period of waves offshore (s)
    Direction of waves offshore
    Tuesday (16 September 2025)
    Time
    00:00
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Partly cloudy night Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Cloudy
    Chance of precipitation
    20%
    20%
    10%
    20%
    30%
    30%
    20%
    20%
    30%
    Temperature (°C)
    13°
    13°
    12°
    12°
    14°
    16°
    16°
    14°
    13°
    Feels like temperature (°C)
    11°
    11°
    11°
    10°
    13°
    14°
    13°
    12°
    12°
    Wind direction and speed (mph)
    W
    12
    W
    11
    W
    9
    W
    7
    W
    10
    WSW
    14
    WSW
    13
    WSW
    10
    WSW
    9
    Wind gust (mph)
    29
    19
    17
    22
    26
    27
    24
    18
    16
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    82%
    84%
    86%
    90%
    76%
    70%
    71%
    80%
    88%
    UV - - - 1 3 4 2 1 -
    Wind direction and speed (mph)
    Height of waves offshore (m)
    Period of waves offshore (s)
    Direction of waves offshore
    Wednesday (17 September 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Cloudy Cloudy Cloudy Light shower day Cloudy Cloudy Cloudy Cloudy
    Chance of precipitation
    30%
    50%
    50%
    50%
    40%
    30%
    30%
    30%
    Temperature (°C)
    13°
    13°
    12°
    15°
    16°
    16°
    15°
    13°
    Feels like temperature (°C)
    11°
    11°
    10°
    13°
    14°
    14°
    12°
    11°
    Wind direction and speed (mph)
    WSW
    9
    WSW
    9
    WSW
    10
    WSW
    12
    SW
    14
    WSW
    14
    WSW
    13
    WSW
    11
    Wind gust (mph)
    14
    12
    17
    23
    21
    18
    14
    14
    Visibility (description)
    G
    G
    G
    G
    G
    VG
    VG
    G
    Humidity
    92%
    94%
    95%
    90%
    80%
    76%
    85%
    89%
    UV - - 1 2 4 1 1 -
    Wind direction and speed (mph)
    Height of waves offshore (m)
    Period of waves offshore (s)
    Direction of waves offshore

    Tide times

    Thursday 11 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Thursday 11 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Thursday 11 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Thursday 11 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Friday 12 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Friday 12 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Friday 12 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Friday 12 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Saturday 13 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Saturday 13 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Saturday 13 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Saturday 13 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Sunday 14 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Sunday 14 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Sunday 14 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Sunday 14 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Monday 15 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Monday 15 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Monday 15 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Monday 15 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Tuesday 16 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Tuesday 16 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Tuesday 16 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Tuesday 16 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Wednesday 17 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Wednesday 17 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Wednesday 17 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Wednesday 17 September

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Portland Harbour - Sandsfoot Castle (Beach) weather map

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    WARNING
    Flood warnings icon
    Flood warnings in force for England
    Flood warnings in force for England

    South West England weather forecast

    Headline:

    Blustery with sunny spells and heavy showers. Feeling cooler.

    Today:

    Sunny spells and showers, these frequent and heavy at times with a chance of hail and thunder in places. Blustery winds, especially in coastal areas and over the hills and feeling cooler. Maximum temperature 18 °C.

    Tonight:

    Showers continuing for some overnight, these heavy and frequent in some western areas and in areas adjacent to the Bristol Channel. Winds easing inland but staying breezy on coasts. Minimum temperature 8 °C.

    Friday:

    Another changeable day with sunny spells and cloudier periods. Showers are likely, these heavy with perhaps some thunder, but drier periods more prevalent than on Thursday. Breezy at times. Maximum temperature 18 °C.

    Outlook for Saturday to Monday:

    Sunny spells and blustery showers on Saturday, these perhaps easing later. Much windier on Sunday with heavy rain likely for a time. Probably brighter on Monday with showers. Feeling cooler.

    Updated:

    UK long range weather forecast

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