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Porth Swtan / Church Bay (Isle of Anglesey) 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.
Beach safety today
Large, powerful waves
  • • only experts should take part in water activities

Tide: Next high tide (4.9m) at

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

    7 day forecast for Porth Swtan / Church Bay

    Today (17 September 2025)
    Time
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Sunny intervals Sunny intervals Sunny intervals Sunny intervals Clear night Clear night Clear night Clear night Clear night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature
    19°
    18°
    18°
    17°
    16°
    16°
    16°
    15°
    15°
    Feels like temperature (°C)
    15°
    15°
    15°
    14°
    14°
    13°
    13°
    13°
    13°
    Wind direction and speed
    SW
    18
    SW
    17
    SW
    17
    SW
    16
    SW
    16
    SW
    16
    SW
    15
    SW
    14
    SW
    13
    Wind gust (mph)
    29
    28
    28
    29
    29
    29
    29
    27
    26
    Visibility
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    81%
    79%
    82%
    85%
    85%
    86%
    87%
    88%
    89%
    UV 3 2 1 1 1 - - - -
    Wind direction and speed
    18
    17
    17
    16
    16
    15
    15
    14
    13
    Height of waves offshore (m)
    0.9
    0.9
    1.0
    1.0
    1.0
    1.0
    1.0
    1.0
    0.9
    Period of waves offshore (s)
    9
    9
    9
    9
    9
    9
    9
    9
    6
    Direction of waves offshore
    Thursday (18 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 Clear night Clear night Clear night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Cloudy Overcast Light rain Light rain Light rain Light rain Light rain Light rain Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast
    Chance of precipitation
    <5%
    <5%
    <5%
    10%
    <5%
    20%
    30%
    40%
    40%
    70%
    80%
    70%
    60%
    50%
    60%
    30%
    30%
    20%
    20%
    20%
    20%
    20%
    20%
    30%
    Temperature (°C)
    15°
    15°
    14°
    14°
    14°
    14°
    14°
    14°
    15°
    15°
    16°
    16°
    17°
    17°
    17°
    18°
    18°
    18°
    18°
    18°
    17°
    17°
    17°
    17°
    Feels like temperature (°C)
    13°
    13°
    13°
    12°
    12°
    12°
    12°
    12°
    13°
    13°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    Wind direction and speed (mph)
    SW
    13
    SW
    12
    SW
    11
    SW
    11
    SW
    11
    SW
    10
    SW
    11
    SW
    10
    SSW
    11
    SSW
    12
    SSW
    14
    SSW
    16
    SSW
    18
    SSW
    20
    SSW
    21
    SSW
    22
    SSW
    22
    SSW
    22
    SSW
    22
    SSW
    22
    SSW
    21
    SSW
    21
    SSW
    21
    SSW
    21
    Wind gust (mph)
    25
    24
    25
    24
    23
    23
    23
    23
    23
    24
    25
    24
    30
    38
    40
    43
    43
    42
    42
    41
    40
    41
    38
    37
    Visibility (description)
    VG
    E
    E
    E
    E
    E
    E
    E
    VG
    VG
    G
    G
    M
    G
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    89%
    86%
    86%
    86%
    85%
    86%
    86%
    86%
    88%
    91%
    95%
    96%
    96%
    96%
    94%
    94%
    94%
    95%
    96%
    96%
    96%
    96%
    96%
    95%
    UV - - - - - - 1 1 1 1 1 1 2 2 2 1 1 1 1 1 - - - -
    Wind direction and speed (mph)
    12
    12
    11
    11
    11
    10
    10
    10
    11
    12
    14
    16
    18
    20
    21
    22
    22
    22
    22
    22
    21
    21
    21
    21
    Height of waves offshore (m)
    0.8
    0.8
    0.8
    0.8
    0.8
    0.8
    0.8
    0.8
    0.8
    0.8
    0.8
    0.7
    0.7
    0.7
    0.8
    0.9
    1.1
    1.2
    1.4
    1.5
    1.5
    1.5
    1.4
    1.4
    Period of waves offshore (s)
    4
    4
    5
    5
    5
    5
    5
    7
    7
    7
    5
    5
    5
    3
    4
    4
    7
    7
    8
    8
    8
    8
    8
    8
    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 Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Cloudy Light rain Light rain Light rain
    Chance of precipitation
    40%
    50%
    50%
    50%
    60%
    70%
    70%
    70%
    70%
    70%
    70%
    60%
    70%
    80%
    80%
    70%
    70%
    60%
    50%
    50%
    50%
    50%
    60%
    70%
    Temperature (°C)
    17°
    17°
    17°
    17°
    17°
    17°
    17°
    16°
    16°
    16°
    17°
    17°
    17°
    17°
    17°
    17°
    16°
    16°
    16°
    15°
    15°
    15°
    15°
    15°
    Feels like temperature (°C)
    14°
    14°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    14°
    14°
    15°
    15°
    15°
    15°
    15°
    15°
    15°
    15°
    14°
    14°
    14°
    14°
    14°
    Wind direction and speed (mph)
    SSW
    21
    SSW
    21
    SSW
    21
    SSW
    21
    SSW
    21
    SSW
    20
    SSW
    20
    SSW
    19
    SSW
    18
    SSW
    16
    SSW
    16
    SSW
    15
    SSW
    15
    SSW
    14
    SSW
    13
    SW
    12
    SW
    11
    SW
    10
    SW
    10
    SW
    9
    SW
    8
    SW
    8
    SW
    8
    SW
    7
    Wind gust (mph)
    41
    41
    39
    41
    40
    38
    36
    35
    30
    27
    24
    24
    25
    21
    17
    19
    17
    15
    15
    13
    13
    12
    12
    12
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    G
    G
    M
    G
    G
    VG
    VG
    G
    G
    G
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    94%
    93%
    94%
    93%
    93%
    93%
    94%
    95%
    96%
    96%
    95%
    93%
    92%
    92%
    93%
    92%
    92%
    91%
    92%
    93%
    94%
    94%
    95%
    96%
    UV - - - - - - 1 1 1 1 2 2 2 2 2 1 1 1 1 1 - - - -
    Wind direction and speed (mph)
    21
    21
    21
    19
    16
    14
    11
    9
    8
    Height of waves offshore (m)
    1.2
    1.1
    1.0
    1.1
    1.0
    0.7
    0.5
    0.5
    0.5
    Period of waves offshore (s)
    8
    8
    8
    8
    8
    7
    9
    9
    5
    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 Light rain Light rain Light rain Light rain Light rain Light rain Heavy rain Light rain Light rain Light rain Heavy rain Light rain Light rain Light rain Light rain Light rain Heavy rain Light shower day Light shower day Light shower night Light shower night Heavy shower night Heavy shower night Heavy rain
    Chance of precipitation
    70%
    60%
    60%
    60%
    60%
    60%
    70%
    70%
    70%
    70%
    70%
    70%
    70%
    70%
    70%
    70%
    70%
    60%
    60%
    70%
    70%
    80%
    80%
    80%
    Temperature (°C)
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    15°
    15°
    15°
    14°
    14°
    14°
    14°
    13°
    13°
    12°
    12°
    12°
    Feels like temperature (°C)
    14°
    14°
    14°
    14°
    14°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    12°
    12°
    12°
    11°
    11°
    10°
    10°
    10°
    Wind direction and speed (mph)
    W
    7
    WNW
    6
    NW
    6
    NNE
    6
    NE
    5
    N
    5
    NNE
    6
    NE
    6
    NNE
    6
    NE
    7
    ENE
    8
    NE
    10
    NNE
    11
    NNE
    12
    NNE
    12
    NNE
    13
    N
    13
    NNW
    13
    N
    13
    N
    14
    NNW
    13
    N
    13
    N
    13
    N
    14
    Wind gust (mph)
    13
    12
    12
    11
    10
    11
    11
    12
    12
    12
    15
    17
    19
    21
    21
    21
    21
    19
    24
    24
    23
    21
    25
    26
    Visibility (description)
    VG
    VG
    VG
    VG
    G
    G
    M
    M
    G
    G
    G
    G
    G
    G
    G
    VG
    VG
    VG
    VG
    E
    E
    E
    E
    E
    Humidity
    96%
    95%
    94%
    94%
    94%
    95%
    96%
    96%
    95%
    93%
    93%
    91%
    90%
    87%
    87%
    87%
    86%
    84%
    84%
    86%
    85%
    85%
    85%
    86%
    UV - - - - - - - 1 1 1 1 1 2 2 2 2 1 1 1 1 - - - -
    Wind direction and speed (mph)
    6
    5
    6
    8
    12
    13
    14
    13
    Height of waves offshore (m)
    0.3
    0.3
    0.3
    0.4
    0.7
    1.1
    1.6
    2.3
    Period of waves offshore (s)
    9
    8
    8
    5
    4
    5
    6
    7
    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 Heavy rain Heavy rain Light rain 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 Light shower day Light shower night Light shower night Partly cloudy night Light shower night Partly cloudy night
    Chance of precipitation
    80%
    80%
    80%
    70%
    60%
    60%
    60%
    60%
    60%
    60%
    60%
    60%
    60%
    50%
    50%
    60%
    50%
    50%
    50%
    50%
    50%
    50%
    50%
    40%
    Temperature (°C)
    12°
    11°
    11°
    11°
    11°
    10°
    10°
    10°
    10°
    11°
    11°
    12°
    12°
    13°
    13°
    13°
    13°
    13°
    13°
    12°
    12°
    12°
    11°
    11°
    Feels like temperature (°C)
    10°
    10°
    10°
    10°
    10°
    10°
    Wind direction and speed (mph)
    N
    15
    N
    16
    N
    16
    N
    16
    N
    16
    N
    16
    N
    15
    N
    15
    N
    15
    N
    15
    N
    16
    N
    16
    N
    16
    N
    16
    N
    15
    N
    16
    N
    16
    N
    15
    NNE
    14
    NNE
    13
    NNE
    12
    NNE
    12
    NNE
    12
    NNE
    11
    Wind gust (mph)
    28
    29
    30
    31
    30
    29
    33
    35
    34
    33
    33
    34
    33
    33
    33
    33
    31
    33
    33
    32
    31
    31
    30
    28
    Visibility (description)
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    VG
    VG
    VG
    VG
    Humidity
    86%
    84%
    84%
    84%
    83%
    80%
    76%
    77%
    78%
    72%
    68%
    64%
    66%
    60%
    59%
    59%
    63%
    58%
    62%
    65%
    67%
    67%
    67%
    68%
    UV - - - - - - - 1 1 1 2 3 3 3 3 2 2 1 1 1 - - - -
    Wind direction and speed (mph)
    16
    16
    15
    16
    16
    16
    13
    12
    Height of waves offshore (m)
    3.2
    3.3
    2.7
    2.1
    1.8
    1.9
    2.1
    1.9
    Period of waves offshore (s)
    8
    8
    8
    7
    7
    7
    7
    7
    Direction of waves offshore
    Monday (22 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 Cloudy Cloudy Cloudy Cloudy Cloudy
    Chance of precipitation
    40%
    20%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    11°
    11°
    10°
    10°
    12°
    13°
    13°
    11°
    10°
    Feels like temperature (°C)
    10°
    11°
    11°
    10°
    Wind direction and speed (mph)
    NNE
    11
    NNE
    10
    NNE
    9
    NNE
    8
    NNE
    10
    NNE
    11
    NNE
    10
    NNE
    9
    NE
    7
    Wind gust (mph)
    27
    19
    17
    17
    21
    21
    18
    12
    9
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    G
    VG
    VG
    VG
    Humidity
    69%
    71%
    73%
    74%
    61%
    55%
    54%
    68%
    76%
    UV - - - 1 2 3 2 1 -
    Wind direction and speed (mph)
    10
    9
    8
    10
    11
    10
    9
    7
    Height of waves offshore (m)
    1.4
    1.2
    1.2
    1.1
    Period of waves offshore (s)
    6
    6
    6
    5
    Direction of waves offshore
    Tuesday (23 September 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Cloudy Cloudy Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night
    Chance of precipitation
    10%
    <5%
    10%
    10%
    10%
    10%
    10%
    10%
    Temperature (°C)
    10°
    13°
    14°
    14°
    12°
    11°
    Feels like temperature (°C)
    11°
    12°
    12°
    10°
    Wind direction and speed (mph)
    NE
    6
    NE
    5
    NE
    6
    NE
    9
    NE
    10
    NE
    10
    NE
    8
    NE
    7
    Wind gust (mph)
    8
    6
    10
    16
    17
    17
    10
    7
    Visibility (description)
    VG
    G
    VG
    VG
    VG
    VG
    VG
    G
    Humidity
    79%
    85%
    86%
    69%
    60%
    63%
    76%
    87%
    UV - - 1 2 4 2 1 -
    Wind direction and speed (mph)
    6
    Height of waves offshore (m)
    0.3
    Period of waves offshore (s)
    3
    Direction of waves offshore

    Tide times

    Wednesday 17 September

    Tide times and heights are from Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 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 Holyhead tidal station which is 4.2 miles away. So times may be different at this beach. What does this mean?

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

    Porth Swtan / Church 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:

    Heavy and persistent rain.

    Today:

    Heaviest and most persistent rain clearing eastwards through the morning, though remaining cloudy with outbreaks of patchy rain and drizzle throughout the day, turning heavy at times over the hills. Breezy. Maximum temperature 19 °C.

    Tonight:

    Rain persisting throughout this evening and overnight, this turning heavy at times especially over the hills and mountains. Windy for all, especially along the coasts, and feeling humid. Minimum temperature 8 °C.

    Thursday:

    A cloudy, damp and mild start to Thursday. Cloud breaking in the east but drizzle persisting over the hills in the west. Staying windy. Maximum temperature 18 °C.

    Outlook for Friday to Sunday:

    Remaining changeable with showers or longer spells of rain at times. Some brighter periods are also likely, mainly on Friday. Temperatures close to average but turning colder later Sunday. Breezy.

    Updated:

    UK long range weather forecast

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