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Caswell Bay (Swansea) 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

Overcast.
Beach safety today
Large, powerful waves
  • • only experts should take part in water activities

Tide: Next low tide (2.7m) at

Sunrise iconSunrise:
Sunset iconSunset:
M UV
L Pollution
No pollen data.

    7 day forecast for Caswell Bay

    Today (18 September 2025)
    Time
    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 Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast
    Chance of precipitation
    20%
    20%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature
    18°
    18°
    19°
    19°
    19°
    19°
    19°
    19°
    19°
    18°
    18°
    18°
    18°
    Feels like temperature (°C)
    15°
    15°
    16°
    16°
    16°
    17°
    17°
    16°
    17°
    17°
    16°
    16°
    16°
    Wind direction and speed
    SW
    18
    SW
    18
    SW
    18
    SW
    17
    SW
    16
    SW
    16
    SW
    15
    SW
    15
    SW
    14
    SSW
    13
    SSW
    12
    SSW
    13
    SSW
    13
    Wind gust (mph)
    35
    35
    34
    32
    32
    31
    30
    29
    27
    27
    27
    27
    26
    Visibility
    G
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    94%
    93%
    91%
    88%
    88%
    85%
    85%
    85%
    86%
    86%
    87%
    90%
    90%
    UV 2 2 2 2 2 1 1 1 1 - - - -
    Wind direction and speed
    18
    18
    18
    17
    16
    16
    15
    15
    14
    13
    12
    13
    13
    Height of waves offshore (m)
    1.9
    1.8
    1.7
    1.6
    1.6
    1.5
    1.5
    1.4
    1.4
    1.4
    1.3
    1.3
    1.3
    Period of waves offshore (s)
    7
    7
    11
    11
    11
    11
    11
    11
    11
    11
    10
    10
    10
    Direction of waves offshore
    Friday (19 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 Overcast Overcast Overcast Overcast Overcast Cloudy Cloudy Overcast Overcast Overcast Overcast Overcast Cloudy Sunny intervals Sunny intervals Cloudy Cloudy Overcast Overcast Overcast Overcast Overcast Overcast Overcast
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    20%
    20%
    20%
    20%
    Temperature (°C)
    18°
    17°
    17°
    17°
    17°
    17°
    17°
    17°
    16°
    17°
    17°
    18°
    18°
    18°
    19°
    19°
    19°
    19°
    18°
    18°
    17°
    17°
    17°
    17°
    Feels like temperature (°C)
    16°
    16°
    16°
    16°
    15°
    15°
    15°
    15°
    15°
    15°
    16°
    16°
    17°
    18°
    18°
    18°
    18°
    18°
    18°
    18°
    18°
    17°
    17°
    16°
    Wind direction and speed (mph)
    SSW
    12
    SSW
    12
    S
    11
    S
    11
    S
    11
    S
    11
    S
    11
    S
    10
    S
    10
    S
    10
    S
    10
    S
    10
    SSW
    9
    SSW
    8
    SSW
    8
    SW
    8
    SW
    8
    SW
    8
    SW
    7
    SW
    6
    SW
    5
    SW
    5
    SSW
    5
    S
    6
    Wind gust (mph)
    25
    25
    23
    23
    23
    22
    21
    21
    21
    19
    20
    19
    19
    18
    16
    16
    15
    13
    11
    10
    9
    10
    11
    12
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    90%
    90%
    90%
    89%
    87%
    87%
    87%
    87%
    86%
    85%
    85%
    84%
    83%
    82%
    80%
    79%
    81%
    84%
    86%
    87%
    92%
    93%
    92%
    92%
    UV - - - - - - 1 1 1 1 2 2 2 3 2 2 1 1 1 1 - - - -
    Wind direction and speed (mph)
    12
    12
    11
    11
    11
    11
    11
    10
    10
    10
    10
    10
    9
    8
    8
    8
    8
    8
    7
    6
    5
    5
    5
    6
    Height of waves offshore (m)
    1.4
    1.4
    1.3
    1.3
    1.3
    1.2
    1.2
    1.2
    1.2
    1.2
    1.2
    1.2
    1.3
    1.3
    1.3
    1.2
    1.1
    1.1
    1.0
    0.9
    0.9
    0.9
    0.9
    0.9
    Period of waves offshore (s)
    10
    10
    10
    10
    10
    10
    10
    10
    10
    10
    10
    10
    10
    9
    9
    9
    9
    9
    9
    9
    9
    9
    9
    9
    Direction of waves offshore
    Saturday (20 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 Overcast Overcast Overcast Overcast Overcast Overcast Cloudy Cloudy Light rain Light rain Light rain Light shower day Light shower day Cloudy Cloudy Light shower day Light shower day Light shower day Light shower day Light shower night Light shower night Light shower night Light shower night Light shower night
    Chance of precipitation
    30%
    30%
    30%
    30%
    40%
    40%
    40%
    40%
    50%
    70%
    70%
    60%
    60%
    50%
    50%
    50%
    70%
    60%
    70%
    80%
    80%
    70%
    70%
    70%
    Temperature (°C)
    16°
    16°
    16°
    16°
    16°
    16°
    15°
    15°
    15°
    16°
    16°
    17°
    17°
    17°
    17°
    17°
    17°
    16°
    15°
    15°
    14°
    14°
    14°
    13°
    Feels like temperature (°C)
    16°
    16°
    15°
    15°
    15°
    15°
    15°
    14°
    14°
    15°
    15°
    15°
    16°
    15°
    15°
    15°
    13°
    13°
    12°
    12°
    11°
    11°
    11°
    10°
    Wind direction and speed (mph)
    S
    7
    S
    7
    S
    7
    S
    7
    SSE
    7
    SSE
    8
    SSE
    8
    SE
    8
    SE
    8
    SE
    9
    ESE
    10
    SE
    11
    SSE
    12
    S
    13
    SSW
    14
    SSW
    16
    SW
    18
    WSW
    19
    WSW
    19
    WSW
    18
    WSW
    18
    WSW
    17
    WSW
    16
    W
    16
    Wind gust (mph)
    14
    15
    16
    16
    17
    18
    17
    15
    17
    19
    20
    21
    21
    23
    22
    24
    28
    28
    28
    33
    33
    30
    30
    32
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    G
    G
    G
    G
    VG
    VG
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    Humidity
    92%
    91%
    90%
    90%
    89%
    88%
    90%
    91%
    90%
    91%
    92%
    92%
    90%
    87%
    85%
    82%
    82%
    83%
    84%
    85%
    84%
    83%
    83%
    81%
    UV - - - - - - - 1 1 1 1 2 2 2 3 2 2 1 1 1 - - - -
    Wind direction and speed (mph)
    7
    7
    7
    8
    10
    13
    18
    18
    16
    Height of waves offshore (m)
    1.0
    1.0
    0.9
    0.8
    0.7
    0.9
    2.7
    2.7
    2.0
    Period of waves offshore (s)
    9
    9
    9
    9
    9
    9
    8
    9
    10
    Direction of waves offshore
    Sunday (21 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 Light shower night Light shower night Light shower night Light shower night Light shower night Light shower night Light shower night Light shower day Light shower day Light shower day Light shower day Light shower day Light shower day Light shower day Light shower day Light shower day Light shower day Sunny intervals Sunny intervals Cloudy Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
    Chance of precipitation
    70%
    70%
    70%
    70%
    60%
    60%
    50%
    50%
    50%
    50%
    60%
    60%
    60%
    60%
    60%
    60%
    50%
    50%
    40%
    40%
    40%
    40%
    30%
    20%
    Temperature (°C)
    13°
    12°
    12°
    12°
    11°
    11°
    11°
    11°
    11°
    11°
    12°
    12°
    13°
    13°
    13°
    14°
    13°
    13°
    13°
    12°
    11°
    11°
    10°
    10°
    Feels like temperature (°C)
    10°
    10°
    10°
    10°
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    10°
    10°
    Wind direction and speed (mph)
    W
    15
    W
    14
    WNW
    13
    WNW
    12
    WNW
    11
    NW
    11
    NW
    11
    NW
    11
    NW
    10
    NW
    11
    NW
    11
    NW
    11
    NNW
    11
    NW
    11
    NNW
    12
    NNW
    12
    NNW
    12
    NNW
    11
    NNW
    11
    NNW
    10
    NNW
    9
    NNW
    8
    NNW
    8
    N
    9
    Wind gust (mph)
    28
    21
    24
    24
    24
    24
    21
    21
    21
    21
    21
    22
    21
    24
    25
    25
    24
    23
    21
    20
    20
    19
    17
    18
    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
    83%
    84%
    85%
    86%
    86%
    86%
    85%
    84%
    84%
    81%
    79%
    75%
    73%
    69%
    69%
    66%
    69%
    71%
    70%
    74%
    78%
    79%
    82%
    81%
    UV - - - - - - - 1 1 1 2 3 3 3 2 2 1 1 1 1 - - - -
    Wind direction and speed (mph)
    14
    11
    11
    11
    11
    12
    10
    8
    Height of waves offshore (m)
    1.7
    1.2
    1.0
    0.8
    0.7
    0.6
    0.5
    0.4
    Period of waves offshore (s)
    9
    8
    8
    8
    8
    8
    8
    8
    Direction of waves offshore
    Monday (22 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 Clear night Sunny day Sunny day Sunny day Sunny day Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Clear night Clear night Clear night Clear night Clear night
    Chance of precipitation
    20%
    20%
    20%
    20%
    10%
    10%
    10%
    10%
    10%
    10%
    <5%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    10°
    10°
    10°
    11°
    13°
    14°
    15°
    15°
    15°
    15°
    15°
    14°
    12°
    11°
    10°
    10°
    Feels like temperature (°C)
    11°
    12°
    12°
    13°
    13°
    13°
    12°
    12°
    10°
    Wind direction and speed (mph)
    N
    9
    N
    9
    N
    8
    N
    8
    N
    8
    N
    8
    N
    8
    N
    8
    N
    8
    N
    9
    NNE
    10
    NNE
    11
    NNE
    11
    NNE
    11
    NNE
    11
    NNE
    11
    NNE
    11
    N
    11
    N
    10
    N
    9
    N
    8
    N
    7
    N
    7
    N
    6
    Wind gust (mph)
    18
    17
    17
    17
    17
    17
    17
    17
    19
    20
    21
    21
    21
    21
    21
    21
    22
    23
    21
    21
    20
    18
    17
    15
    Visibility (description)
    E
    E
    E
    E
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    E
    E
    E
    E
    E
    E
    E
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    81%
    82%
    84%
    84%
    84%
    84%
    83%
    83%
    80%
    75%
    67%
    59%
    55%
    46%
    44%
    44%
    47%
    48%
    54%
    59%
    66%
    70%
    73%
    75%
    UV - - - - - - - 1 1 1 2 4 4 4 3 2 2 1 1 1 - - - -
    Wind direction and speed (mph)
    9
    8
    8
    10
    11
    11
    9
    7
    Height of waves offshore (m)
    0.5
    0.4
    0.4
    0.4
    0.3
    0.3
    0.3
    0.3
    Period of waves offshore (s)
    8
    8
    8
    8
    8
    8
    6
    5
    Direction of waves offshore
    Tuesday (23 September 2025)
    Time
    00:00
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Clear night Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Cloudy Sunny intervals Partly cloudy night Partly cloudy night
    Chance of precipitation
    <5%
    <5%
    10%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    12°
    15°
    15°
    13°
    10°
    Feels like temperature (°C)
    10°
    13°
    13°
    11°
    Wind direction and speed (mph)
    N
    6
    N
    5
    N
    5
    N
    5
    N
    7
    NNE
    8
    N
    9
    N
    7
    NNE
    5
    Wind gust (mph)
    13
    10
    8
    9
    14
    15
    14
    11
    8
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    76%
    78%
    80%
    85%
    67%
    54%
    52%
    65%
    77%
    UV - - - 1 2 4 2 1 -
    Wind direction and speed (mph)
    5
    5
    5
    7
    8
    9
    7
    5
    Height of waves offshore (m)
    0.2
    0.1
    0.1
    0.1
    0.1
    0.1
    0.2
    0.2
    Period of waves offshore (s)
    8
    8
    8
    10
    13
    13
    13
    12
    Direction of waves offshore
    Wednesday (24 September 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Cloudy Cloudy Partly cloudy night Partly cloudy night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    10%
    <5%
    <5%
    <5%
    Temperature (°C)
    10°
    12°
    15°
    16°
    13°
    11°
    Feels like temperature (°C)
    11°
    14°
    14°
    12°
    10°
    Wind direction and speed (mph)
    NNE
    4
    NNE
    4
    NNE
    4
    NE
    7
    E
    7
    NNW
    7
    N
    7
    NNE
    5
    Wind gust (mph)
    7
    6
    7
    10
    11
    10
    8
    6
    Visibility (description)
    VG
    G
    G
    VG
    VG
    VG
    VG
    VG
    Humidity
    82%
    85%
    88%
    75%
    59%
    57%
    73%
    80%
    UV - - 1 2 4 1 1 -
    Wind direction and speed (mph)
    4
    Height of waves offshore (m)
    Period of waves offshore (s)
    Direction of waves offshore

    Tide times

    Thursday 18 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 18 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 18 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 18 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 19 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 19 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 19 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 19 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 20 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 20 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 20 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 20 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 21 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 21 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 21 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 21 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 22 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 22 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 22 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 22 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 23 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 23 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 23 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 23 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 24 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 24 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 24 September

    Tide times and heights are from Mumbles tidal station which is 2.7 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 24 September

    Tide times and heights are from Mumbles tidal station which is 2.7 miles away. So times may be different at this beach. What does this mean?

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

    Caswell Bay weather map

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    WARNING
    Flood alerts icon
    Flood alerts in force for Wales
    Flood alerts in force for Wales

    Wales weather forecast

    Headline:

    Often cloudy with patchy rain at times.

    Today:

    A cloudy, damp and mild start to Thursday. Cloud breaking in the east with some brighter spells, but drizzle persisting over the hills in the west. Staying windy and humid. Maximum temperature 20 °C.

    Tonight:

    Remaining cloudy in the west overnight with drizzle persisting over hills. Drier in the east with a few clear spells. Windy in the northwest, but winds easing elsewhere by dawn. Minimum temperature 12 °C.

    Friday:

    Cloudy in the west with rain and drizzle, turning heavy at times over hills and mountains. Some brighter and drier intervals in the east. Winds continue to ease. Feeling humid. Maximum temperature 20 °C.

    Outlook for Saturday to Monday:

    Remaining changeable with showers or longer spells of rain on Saturday. Turning colder through Sunday as showery rain clears southeast, leaving sunny spells and showers on Monday.

    Updated:

    UK long range weather forecast

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