Porth Tywyn Mawr (Sandy Beach) (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
Use caution in and out of the sea. Strong winds may blow you off course or affect your balance
  • • paddle boarding/kayaking not recommended at any level
  • • consider your abilities in all other activities, seek expert advice

Tide: Next high tide (4.8m) at

Sunrise iconSunrise:
Sunset iconSunset:
M UV
L Pollution

    8 day forecast for Porth Tywyn Mawr (Sandy Beach)

    Today (4 April 2025)
    Time
    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 Cloudy Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Clear night Clear night Clear night
    Chance of precipitation
    10%
    <5%
    <5%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature
    12°
    13°
    15°
    16°
    16°
    16°
    15°
    15°
    14°
    13°
    12°
    10°
    Feels like temperature (°C)
    10°
    10°
    12°
    13°
    12°
    13°
    12°
    12°
    10°
    Wind direction and speed
    ENE
    13
    ENE
    14
    ENE
    16
    ENE
    16
    ENE
    17
    ENE
    17
    ENE
    17
    ENE
    17
    ENE
    17
    ENE
    18
    ENE
    18
    ENE
    19
    Wind gust (mph)
    22
    23
    23
    25
    26
    27
    28
    30
    31
    33
    36
    36
    Visibility
    M
    G
    G
    G
    G
    G
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    76%
    73%
    66%
    63%
    61%
    57%
    58%
    59%
    60%
    64%
    66%
    70%
    UV 3 3 3 2 2 1 1 1 - - - -
    Wind direction and speed
    13
    14
    16
    16
    17
    17
    17
    17
    17
    17
    18
    19
    Height of waves offshore (m)
    0.3
    0.3
    0.4
    0.4
    0.5
    0.5
    0.6
    0.6
    0.6
    0.6
    0.6
    0.6
    Period of waves offshore (s)
    5
    5
    4
    3
    3
    3
    4
    4
    4
    4
    4
    4
    Direction of waves offshore
    Saturday (5 April 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 Clear night Clear night Clear night Clear night Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Clear night Clear night Clear night Clear night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    10°
    10°
    11°
    12°
    13°
    14°
    15°
    16°
    15°
    15°
    13°
    12°
    11°
    10°
    Feels like temperature (°C)
    10°
    11°
    12°
    12°
    12°
    12°
    11°
    Wind direction and speed (mph)
    ENE
    19
    ENE
    18
    ENE
    18
    ENE
    18
    ENE
    17
    ENE
    17
    ENE
    17
    ENE
    17
    ENE
    18
    ENE
    19
    ENE
    19
    ENE
    19
    ENE
    19
    ENE
    18
    ENE
    18
    ENE
    18
    ENE
    17
    ENE
    16
    ENE
    14
    ENE
    12
    ENE
    12
    E
    12
    E
    13
    E
    14
    Wind gust (mph)
    36
    35
    34
    33
    32
    32
    34
    34
    34
    33
    33
    30
    29
    29
    28
    26
    25
    25
    25
    25
    26
    28
    30
    30
    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
    72%
    74%
    75%
    75%
    75%
    76%
    77%
    79%
    77%
    72%
    67%
    65%
    62%
    57%
    55%
    54%
    54%
    55%
    56%
    64%
    65%
    63%
    62%
    62%
    UV - - - - - - 1 1 1 1 2 3 3 3 3 2 2 1 1 1 1 - - -
    Wind direction and speed (mph)
    19
    18
    18
    18
    17
    17
    17
    17
    18
    19
    19
    19
    19
    18
    18
    18
    17
    16
    14
    12
    12
    12
    13
    14
    Height of waves offshore (m)
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.8
    0.8
    0.7
    0.7
    0.7
    0.7
    0.6
    0.6
    0.6
    0.5
    0.5
    0.5
    0.5
    0.5
    0.5
    0.5
    Period of waves offshore (s)
    5
    5
    5
    5
    5
    5
    5
    5
    4
    4
    4
    4
    4
    5
    5
    5
    5
    5
    5
    5
    5
    5
    5
    5
    Direction of waves offshore
    Sunday (6 April 2025)
    Time
    00:00
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Clear night Clear night Clear night Sunny day Sunny day Sunny day Sunny day Clear night Clear night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    11°
    14°
    15°
    13°
    Feels like temperature (°C)
    13°
    13°
    12°
    Wind direction and speed (mph)
    E
    14
    E
    14
    E
    10
    E
    8
    E
    7
    ENE
    8
    NNE
    9
    ENE
    8
    ESE
    6
    Wind gust (mph)
    31
    31
    28
    24
    18
    19
    18
    16
    16
    Visibility (description)
    VG
    VG
    E
    E
    E
    E
    E
    VG
    VG
    Humidity
    65%
    66%
    69%
    78%
    63%
    53%
    48%
    64%
    75%
    UV - - - 1 2 3 2 1 -
    Wind direction and speed (mph)
    14
    14
    10
    8
    7
    8
    9
    8
    6
    Height of waves offshore (m)
    0.5
    0.5
    0.5
    0.5
    0.4
    0.3
    0.2
    0.2
    0.2
    Period of waves offshore (s)
    5
    5
    6
    5
    5
    5
    8
    11
    11
    Direction of waves offshore
    Monday (7 April 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Clear night Clear night Sunny day Sunny day Sunny day Sunny day Clear night Clear night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    11°
    14°
    14°
    12°
    Feels like temperature (°C)
    11°
    12°
    12°
    11°
    Wind direction and speed (mph)
    ESE
    5
    ESE
    4
    ENE
    3
    NNW
    3
    NNW
    7
    N
    7
    NNE
    6
    ENE
    5
    Wind gust (mph)
    12
    7
    5
    9
    10
    10
    8
    7
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    G
    Humidity
    76%
    81%
    83%
    57%
    52%
    53%
    67%
    86%
    UV - - 1 2 4 2 1 -
    Wind direction and speed (mph)
    5
    4
    3
    3
    7
    7
    6
    5
    Height of waves offshore (m)
    0.2
    0.2
    0.2
    0.2
    0.1
    0.1
    0.1
    0.1
    Period of waves offshore (s)
    10
    10
    10
    9
    9
    9
    10
    10
    Direction of waves offshore
    Tuesday (8 April 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Clear night Clear night Sunny day Sunny day Sunny day Sunny day Clear night Clear night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    12°
    15°
    15°
    12°
    Feels like temperature (°C)
    11°
    13°
    13°
    11°
    Wind direction and speed (mph)
    ENE
    4
    ENE
    4
    ENE
    4
    NE
    4
    NNE
    8
    NNE
    9
    NNE
    7
    ENE
    5
    Wind gust (mph)
    8
    8
    8
    10
    12
    13
    9
    5
    Visibility (description)
    G
    G
    G
    VG
    VG
    VG
    VG
    G
    Humidity
    87%
    89%
    90%
    64%
    54%
    54%
    69%
    87%
    UV - - 1 2 4 2 1 -
    Wind direction and speed (mph)
    4
    4
    4
    4
    8
    9
    7
    5
    Height of waves offshore (m)
    0.2
    0.2
    0.2
    0.2
    0.2
    0.2
    0.2
    0.3
    Period of waves offshore (s)
    8
    8
    8
    8
    8
    10
    12
    13
    Direction of waves offshore
    Wednesday (9 April 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Clear night Clear night Sunny day Sunny day Sunny day Sunny day Clear night Clear night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    12°
    14°
    14°
    12°
    Feels like temperature (°C)
    10°
    13°
    13°
    11°
    Wind direction and speed (mph)
    ENE
    4
    ENE
    5
    ENE
    5
    ENE
    6
    NE
    9
    NE
    9
    NE
    6
    NE
    4
    Wind gust (mph)
    5
    5
    7
    15
    17
    16
    8
    4
    Visibility (description)
    G
    G
    G
    VG
    VG
    VG
    VG
    G
    Humidity
    90%
    91%
    92%
    66%
    56%
    57%
    71%
    93%
    UV - - 1 2 4 2 1 -
    Wind direction and speed (mph)
    4
    5
    5
    6
    9
    9
    6
    4
    Height of waves offshore (m)
    0.2
    0.2
    0.3
    0.3
    0.3
    0.5
    0.4
    0.3
    Period of waves offshore (s)
    13
    13
    13
    13
    12
    12
    12
    12
    Direction of waves offshore
    Thursday (10 April 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Clear night Clear night Sunny day Sunny day Sunny day Sunny day Clear night Clear night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    12°
    15°
    15°
    13°
    Feels like temperature (°C)
    11°
    14°
    14°
    12°
    Wind direction and speed (mph)
    NE
    4
    NE
    4
    ENE
    3
    NNE
    5
    NW
    7
    NW
    8
    NNW
    6
    E
    4
    Wind gust (mph)
    4
    4
    6
    12
    14
    13
    6
    4
    Visibility (description)
    G
    G
    G
    VG
    VG
    VG
    VG
    G
    Humidity
    94%
    96%
    96%
    71%
    61%
    59%
    72%
    94%
    UV - - 1 2 4 2 1 -
    Wind direction and speed (mph)
    4
    Height of waves offshore (m)
    Period of waves offshore (s)
    Direction of waves offshore
    Friday (11 April 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Clear night Clear night Sunny day Sunny day Sunny day Sunny day Clear night Clear night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    12°
    15°
    16°
    13°
    Feels like temperature (°C)
    11°
    14°
    14°
    12°
    Wind direction and speed (mph)
    NNE
    4
    NE
    4
    NE
    4
    NW
    5
    WNW
    8
    WNW
    8
    NW
    7
    NE
    5
    Wind gust (mph)
    3
    3
    6
    12
    14
    13
    7
    5
    Visibility (description)
    G
    G
    G
    VG
    VG
    VG
    VG
    G
    Humidity
    96%
    97%
    98%
    76%
    63%
    59%
    74%
    94%
    UV - - 1 2 4 2 1 -
    Wind direction and speed (mph)
    Height of waves offshore (m)
    Period of waves offshore (s)
    Direction of waves offshore

    Tide times

    Friday 4 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 4 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 4 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 4 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 5 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 5 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 5 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 5 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 6 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 6 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 6 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 6 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 7 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 7 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 7 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 7 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 8 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 8 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 8 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 8 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 9 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 9 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 9 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 9 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 10 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 10 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 10 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 10 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 11 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 11 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 11 April

    Tide times and heights are from Holyhead tidal station which is 2.3 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 11 April

    Tide times and heights are from Holyhead tidal station which is 2.3 miles away. So times may be different at this beach. What does this mean?

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

    UK video forecast

    Porth Tywyn Mawr (Sandy Beach) weather map

    View the weather with our interactive map

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    Wales weather forecast

    Headline:

    Any showers clearing then plenty of warm sunshine. Staying breezy.

    Today:

    Any showers soon clearing to leave brightening skies. Increasingly sunny heading into the afternoon, though turning hazy at times. Temperatures above average and feeling warm, albeit cooler on coasts with the brisk easterly winds persisting. Maximum temperature 22 °C.

    Tonight:

    Staying dry with plenty of evening sunshine. Clear skies for many overnight with just the odd patch of low cloud developing. Turning chilly with winds remaining brisk. Minimum temperature 2 °C.

    Saturday:

    A chillier start, with patchy low cloud clearing fairly readily to leave a dry and sunny day. Feeling less warm than on Friday, still with a brisk easterly wind. Maximum temperature 18 °C.

    Outlook for Sunday to Tuesday:

    Remaining dry and settled on Sunday and into next week. Chilly nights, though daytime temperatures edging back up and feeling warm in the sunshine. Breezy at first, then winds easing.

    Updated:

    UK long range weather forecast

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