Porthmadog (Gwynedd) weather

Forecast days

Heavy rain changing to sunny intervals by late morning.
Sunrise iconSunrise:
Sunset iconSunset:
L UV
L Pollution
Next high tide: for
Morfa Bychan (Craig Du) (Beach)

    7 day forecast for Porthmadog

    Today (27 March 2026)
    Time
    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 Heavy rain Heavy rain Overcast Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Light shower day Light shower day Light shower night Partly cloudy night Clear night Clear night Clear night Clear night
    Chance of precipitation
    ≥95%
    ≥95%
    ≥95%
    90%
    50%
    10%
    10%
    <5%
    <5%
    <5%
    20%
    70%
    90%
    70%
    40%
    20%
    10%
    <5%
    <5%
    Temperature
    10°
    10°
    11°
    11°
    11°
    11°
    11°
    10°
    Feels like temperature (°C)
    Wind direction and speed
    SW
    11
    SW
    11
    SW
    10
    WSW
    9
    WNW
    10
    NW
    10
    WNW
    10
    WNW
    10
    WNW
    10
    WNW
    10
    WNW
    9
    W
    9
    W
    9
    WNW
    8
    WNW
    7
    WNW
    7
    WNW
    7
    WNW
    7
    W
    7
    Wind gust (mph)
    27
    27
    27
    26
    23
    22
    23
    23
    24
    23
    23
    25
    29
    27
    26
    25
    24
    25
    24
    Visibility
    P
    P
    P
    P
    G
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    99%
    99%
    99%
    98%
    90%
    83%
    75%
    65%
    60%
    56%
    55%
    59%
    69%
    75%
    76%
    75%
    74%
    74%
    73%
    UV - 1 1 1 1 1 1 2 2 2 1 1 1 1 - - - - -
    Saturday (28 March 2026)
    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 Partly cloudy night Cloudy Partly cloudy night Partly cloudy night Cloudy Overcast Overcast Cloudy 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 Clear night
    Chance of precipitation
    <5%
    <5%
    10%
    10%
    10%
    10%
    30%
    50%
    50%
    30%
    20%
    30%
    30%
    40%
    50%
    40%
    40%
    50%
    50%
    40%
    30%
    20%
    20%
    10%
    Temperature (°C)
    Feels like temperature (°C)
    Wind direction and speed (mph)
    W
    7
    W
    7
    W
    7
    W
    8
    W
    9
    W
    9
    W
    10
    W
    13
    WNW
    14
    WNW
    15
    WNW
    15
    NW
    15
    NW
    15
    NW
    15
    NW
    14
    NW
    13
    NW
    12
    WNW
    11
    WNW
    9
    W
    8
    W
    6
    WSW
    5
    WNW
    5
    WNW
    5
    Wind gust (mph)
    26
    27
    28
    31
    31
    31
    34
    36
    37
    38
    37
    37
    36
    37
    37
    34
    33
    30
    28
    26
    22
    20
    19
    18
    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
    74%
    74%
    75%
    76%
    76%
    76%
    75%
    74%
    74%
    74%
    68%
    66%
    64%
    58%
    57%
    59%
    61%
    63%
    68%
    76%
    79%
    81%
    82%
    83%
    UV - - - - - - 1 1 1 1 1 2 3 2 2 1 1 1 1 - - - - -
    Sunday (29 March 2026)
    Time
    00:00
    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 Partly cloudy night Partly cloudy night Partly cloudy night Cloudy Cloudy Overcast Light rain Light rain Heavy rain Heavy rain Heavy rain Heavy rain Light rain Light rain Light rain Light shower day Sunny intervals Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    10%
    10%
    20%
    40%
    60%
    70%
    80%
    90%
    90%
    90%
    80%
    60%
    70%
    60%
    40%
    30%
    20%
    20%
    20%
    Temperature (°C)
    10°
    10°
    10°
    10°
    Feels like temperature (°C)
    Wind direction and speed (mph)
    NW
    5
    NW
    4
    NW
    4
    WNW
    5
    WNW
    6
    WSW
    7
    SW
    10
    SW
    13
    SW
    15
    SW
    17
    SW
    18
    SW
    18
    SW
    19
    SW
    18
    SW
    18
    SW
    17
    WSW
    17
    WSW
    15
    WSW
    13
    WSW
    11
    W
    12
    W
    12
    W
    12
    Wind gust (mph)
    17
    18
    18
    20
    22
    27
    30
    34
    38
    41
    43
    44
    44
    45
    45
    44
    43
    40
    38
    37
    36
    36
    36
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    G
    G
    M
    M
    M
    M
    M
    M
    G
    G
    G
    VG
    G
    VG
    Humidity
    85%
    85%
    86%
    86%
    85%
    84%
    82%
    79%
    81%
    83%
    85%
    88%
    92%
    93%
    93%
    93%
    93%
    95%
    94%
    91%
    74%
    74%
    73%
    UV - - - - - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 - - - -
    Monday (30 March 2026)
    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 Cloudy Cloudy Cloudy Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast
    Chance of precipitation
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    <5%
    <5%
    <5%
    10%
    10%
    10%
    10%
    10%
    10%
    20%
    30%
    30%
    Temperature (°C)
    10°
    10°
    11°
    11°
    11°
    11°
    11°
    11°
    10°
    Feels like temperature (°C)
    Wind direction and speed (mph)
    W
    12
    W
    12
    W
    12
    W
    12
    W
    12
    W
    12
    W
    11
    W
    11
    W
    11
    W
    12
    WNW
    13
    WNW
    13
    WNW
    13
    WNW
    12
    WNW
    12
    WNW
    11
    W
    9
    W
    8
    WSW
    7
    WSW
    5
    SW
    4
    SW
    4
    WSW
    3
    WSW
    3
    Wind gust (mph)
    34
    34
    34
    33
    33
    32
    32
    31
    32
    31
    30
    29
    28
    28
    26
    25
    22
    20
    19
    16
    16
    15
    14
    14
    Visibility (description)
    VG
    VG
    VG
    VG
    G
    G
    G
    VG
    G
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    G
    G
    G
    G
    Humidity
    74%
    73%
    74%
    74%
    76%
    76%
    76%
    77%
    76%
    74%
    68%
    66%
    65%
    65%
    63%
    64%
    67%
    69%
    74%
    82%
    90%
    91%
    91%
    93%
    UV - - - - - - 1 1 1 1 1 2 2 2 2 2 1 1 1 1 - - - -
    Tuesday (31 March 2026)
    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 Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast
    Chance of precipitation
    20%
    20%
    40%
    40%
    40%
    40%
    40%
    40%
    30%
    30%
    20%
    20%
    10%
    10%
    10%
    10%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    10°
    11°
    12°
    12°
    13°
    13°
    13°
    13°
    13°
    12°
    12°
    10°
    10°
    10°
    Feels like temperature (°C)
    10°
    10°
    11°
    11°
    11°
    12°
    11°
    11°
    11°
    10°
    10°
    Wind direction and speed (mph)
    WSW
    4
    W
    4
    WSW
    4
    WSW
    5
    WSW
    5
    W
    5
    W
    5
    W
    6
    W
    6
    W
    7
    W
    8
    W
    9
    W
    10
    W
    10
    W
    10
    W
    9
    W
    9
    WSW
    8
    WSW
    7
    SW
    6
    SW
    4
    SW
    3
    WNW
    3
    WSW
    3
    Wind gust (mph)
    15
    16
    17
    19
    20
    19
    19
    20
    20
    21
    22
    22
    22
    21
    21
    20
    18
    17
    16
    14
    14
    14
    13
    13
    Visibility (description)
    G
    G
    G
    G
    M
    M
    M
    M
    M
    G
    G
    VG
    VG
    VG
    G
    G
    VG
    VG
    VG
    G
    G
    G
    M
    M
    Humidity
    93%
    93%
    94%
    94%
    95%
    96%
    97%
    97%
    95%
    93%
    91%
    89%
    86%
    84%
    83%
    81%
    79%
    79%
    83%
    87%
    92%
    95%
    96%
    96%
    UV - - - - - - 1 1 1 1 1 1 2 1 2 2 1 1 1 1 - - - -
    Wednesday (1 April 2026)
    Time
    00:00
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Mist Mist Mist Overcast Overcast Cloudy Cloudy Cloudy Cloudy
    Chance of precipitation
    <5%
    20%
    30%
    30%
    30%
    20%
    20%
    20%
    10%
    Temperature (°C)
    10°
    11°
    12°
    10°
    Feels like temperature (°C)
    Wind direction and speed (mph)
    W
    3
    W
    4
    W
    4
    WSW
    6
    WSW
    9
    W
    11
    W
    11
    W
    7
    WNW
    5
    Wind gust (mph)
    13
    11
    13
    18
    24
    26
    23
    17
    14
    Visibility (description)
    M
    M
    M
    M
    G
    G
    VG
    VG
    M
    Humidity
    97%
    97%
    97%
    97%
    93%
    83%
    80%
    84%
    92%
    UV - - - 1 1 2 1 1 -
    Thursday (2 April 2026)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy
    Chance of precipitation
    10%
    10%
    20%
    20%
    20%
    30%
    30%
    30%
    Temperature (°C)
    11°
    12°
    10°
    Feels like temperature (°C)
    Wind direction and speed (mph)
    SSE
    4
    SSE
    6
    S
    6
    SSW
    9
    SSW
    12
    SSW
    12
    SSW
    12
    SW
    11
    Wind gust (mph)
    15
    15
    19
    26
    27
    27
    27
    28
    Visibility (description)
    G
    G
    G
    G
    VG
    G
    G
    G
    Humidity
    93%
    92%
    94%
    84%
    76%
    75%
    87%
    91%
    UV - - 1 1 2 1 1 -

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    Wales weather forecast

    Headline:

    Some rain today, sunshine and blustery showers tomorrow.

    Today:

    A cloudy morning with rain at times, this gradually clearing through the afternoon with brighter skies developing later. Blustery showers arriving in the north by evening. A little less chilly. Maximum temperature 11 °C.

    Tonight:

    Some late brightness for many then clear spells overnight albeit with a chance of an isolated shower. Turning cold with a rural frost possible. A freshening breeze later. Minimum temperature 0 °C.

    Saturday:

    A dry start for most with some sunshine. Probably turning cloudier for a time with scattered showers, then sunny spells returning through the afternoon. Gusty westerly winds. Feeling chilly. Maximum temperature 9 °C.

    Outlook for Sunday to Tuesday:

    Staying changeable and often windy with rain at times, this heaviest and most persistent on Sunday. Some brighter intervals are likely early next week too. Turning milder. Gales at first.

    Updated:

    UK long range weather forecast

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