Glasfynydd (Usk Reservoir) (Carmarthenshire) weather

Forecast days

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

    7 day forecast for Glasfynydd (Usk Reservoir)

    Today (8 October 2026)
    Time
    23:00
    Weather symbols Light rain
    Chance of precipitation
    ≥95%
    Temperature
    12°
    Feels like temperature (°C)
    9°
    Wind direction and speed
    WSW
    15
    Wind gust (mph)
    30
    Visibility
    P
    Humidity
    99%
    UV -
    Friday (9 October 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 Light rain Light rain Light rain Light rain Light rain Light rain Light rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy shower day Light shower day Sunny intervals Sunny intervals Sunny intervals Light shower day Light shower night Clear night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
    Chance of precipitation
    ≥95%
    ≥95%
    90%
    90%
    90%
    ≥95%
    ≥95%
    ≥95%
    ≥95%
    ≥95%
    ≥95%
    ≥95%
    90%
    50%
    10%
    30%
    40%
    60%
    60%
    40%
    30%
    40%
    20%
    10%
    Temperature (°C)
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    14°
    14°
    13°
    13°
    13°
    12°
    12°
    11°
    11°
    10°
    10°
    9°
    9°
    Feels like temperature (°C)
    10°
    10°
    11°
    11°
    11°
    11°
    10°
    10°
    10°
    10°
    11°
    11°
    11°
    11°
    10°
    10°
    9°
    9°
    8°
    8°
    7°
    7°
    7°
    7°
    Wind direction and speed (mph)
    WSW
    16
    WSW
    16
    WSW
    16
    WSW
    16
    WSW
    16
    WSW
    16
    WSW
    17
    WSW
    17
    WSW
    17
    WSW
    17
    WSW
    16
    WSW
    16
    W
    16
    W
    15
    W
    15
    W
    16
    W
    16
    W
    15
    W
    14
    W
    13
    W
    13
    W
    13
    W
    13
    W
    13
    Wind gust (mph)
    30
    31
    32
    32
    33
    33
    34
    34
    34
    33
    33
    34
    35
    34
    33
    33
    32
    31
    28
    28
    27
    27
    27
    26
    Visibility (description)
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    M
    G
    G
    M
    G
    G
    G
    G
    G
    G
    Humidity
    100%
    99%
    99%
    99%
    99%
    99%
    99%
    99%
    98%
    99%
    99%
    99%
    98%
    92%
    78%
    67%
    68%
    72%
    76%
    78%
    78%
    76%
    77%
    77%
    UV - - - - - - - 1 1 1 1 1 2 2 2 2 1 1 1 - - - - -
    Saturday (10 October 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 Cloudy Overcast Overcast Light shower night Light shower night Cloudy Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Light shower day Light shower night Light shower night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
    Chance of precipitation
    20%
    30%
    50%
    50%
    50%
    50%
    40%
    50%
    40%
    30%
    30%
    10%
    10%
    <5%
    10%
    20%
    30%
    50%
    50%
    50%
    50%
    40%
    40%
    30%
    Temperature (°C)
    9°
    9°
    9°
    9°
    9°
    9°
    9°
    9°
    8°
    9°
    10°
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    10°
    10°
    9°
    8°
    8°
    8°
    Feels like temperature (°C)
    6°
    6°
    6°
    6°
    6°
    6°
    6°
    6°
    5°
    6°
    7°
    8°
    8°
    8°
    8°
    8°
    8°
    8°
    8°
    7°
    6°
    6°
    6°
    6°
    Wind direction and speed (mph)
    WSW
    13
    W
    13
    WSW
    11
    W
    11
    WSW
    10
    W
    11
    W
    11
    W
    11
    W
    11
    W
    13
    W
    14
    WNW
    16
    WNW
    16
    WNW
    16
    WNW
    16
    WNW
    15
    W
    15
    W
    13
    W
    10
    W
    9
    WSW
    9
    WSW
    9
    W
    9
    W
    8
    Wind gust (mph)
    26
    26
    26
    27
    26
    26
    25
    25
    26
    30
    32
    32
    32
    32
    31
    31
    29
    26
    22
    21
    19
    19
    17
    16
    Visibility (description)
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    G
    G
    G
    G
    G
    G
    Humidity
    77%
    78%
    79%
    82%
    83%
    83%
    82%
    81%
    80%
    78%
    72%
    66%
    64%
    62%
    58%
    62%
    64%
    66%
    70%
    76%
    81%
    82%
    82%
    81%
    UV - - - - - - - 1 1 1 2 2 2 3 2 1 1 1 1 - - - - -
    Sunday (11 October 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 Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Cloudy Cloudy Partly cloudy night Cloudy Cloudy Cloudy Cloudy Overcast
    Chance of precipitation
    20%
    30%
    20%
    20%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    20%
    20%
    20%
    20%
    30%
    30%
    30%
    30%
    30%
    40%
    40%
    50%
    Temperature (°C)
    8°
    8°
    8°
    7°
    7°
    6°
    6°
    7°
    7°
    8°
    9°
    10°
    11°
    12°
    13°
    13°
    13°
    12°
    11°
    11°
    10°
    10°
    10°
    10°
    Feels like temperature (°C)
    5°
    5°
    5°
    5°
    5°
    4°
    5°
    5°
    5°
    8°
    9°
    10°
    10°
    11°
    11°
    12°
    11°
    11°
    10°
    10°
    9°
    8°
    8°
    8°
    Wind direction and speed (mph)
    WSW
    8
    WSW
    7
    WSW
    7
    WSW
    6
    WSW
    6
    SW
    6
    SW
    5
    SW
    4
    SW
    4
    SW
    3
    SW
    3
    WSW
    3
    WSW
    5
    SW
    5
    SW
    6
    SW
    5
    SSW
    6
    SSW
    6
    S
    6
    SSE
    6
    SSE
    6
    SSE
    7
    SE
    7
    SE
    7
    Wind gust (mph)
    15
    13
    12
    11
    11
    10
    10
    9
    8
    9
    11
    13
    14
    14
    14
    14
    13
    12
    10
    11
    13
    13
    15
    16
    Visibility (description)
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    M
    M
    M
    M
    M
    M
    M
    M
    Humidity
    81%
    81%
    84%
    84%
    85%
    86%
    85%
    85%
    85%
    81%
    76%
    71%
    67%
    65%
    63%
    65%
    66%
    71%
    78%
    83%
    84%
    86%
    88%
    89%
    UV - - - - - - - 1 1 1 1 2 2 2 2 1 1 1 1 - - - - -
    Monday (12 October 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 Mist Mist 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 Light rain Light rain Light rain Light rain Light rain Light rain
    Chance of precipitation
    50%
    50%
    50%
    60%
    60%
    60%
    60%
    60%
    60%
    60%
    60%
    50%
    60%
    60%
    50%
    50%
    60%
    60%
    60%
    60%
    60%
    70%
    70%
    70%
    Temperature (°C)
    10°
    10°
    11°
    11°
    12°
    12°
    12°
    12°
    12°
    13°
    14°
    15°
    15°
    16°
    16°
    16°
    16°
    16°
    15°
    15°
    15°
    15°
    15°
    15°
    Feels like temperature (°C)
    8°
    8°
    9°
    9°
    10°
    10°
    10°
    10°
    10°
    12°
    13°
    13°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    Wind direction and speed (mph)
    SE
    8
    SE
    8
    SE
    8
    SE
    8
    SE
    9
    SSE
    9
    SSE
    9
    SSE
    9
    SSE
    8
    SSE
    7
    SSE
    7
    SSE
    8
    SSE
    8
    S
    9
    S
    10
    S
    10
    S
    10
    S
    10
    S
    9
    S
    9
    S
    9
    S
    9
    S
    10
    SSW
    11
    Wind gust (mph)
    17
    17
    18
    17
    18
    18
    17
    17
    17
    18
    20
    21
    21
    22
    22
    21
    20
    20
    18
    20
    21
    22
    22
    22
    Visibility (description)
    M
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    Humidity
    91%
    91%
    92%
    92%
    92%
    93%
    94%
    95%
    95%
    94%
    93%
    92%
    90%
    91%
    89%
    91%
    92%
    93%
    94%
    95%
    96%
    97%
    96%
    97%
    UV - - - - - - - 1 1 1 1 1 1 1 1 1 1 1 1 - - - - -
    Tuesday (13 October 2026)
    Time
    00:00
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Light rain Light rain Light rain Light rain Light shower day Sunny intervals Sunny day Mist Mist
    Chance of precipitation
    70%
    80%
    80%
    80%
    60%
    30%
    10%
    10%
    10%
    Temperature (°C)
    15°
    16°
    16°
    16°
    15°
    15°
    14°
    11°
    10°
    Feels like temperature (°C)
    14°
    14°
    14°
    14°
    13°
    14°
    13°
    9°
    9°
    Wind direction and speed (mph)
    SSW
    11
    SSW
    11
    SW
    13
    SW
    13
    WSW
    13
    W
    11
    W
    9
    WSW
    6
    SW
    6
    Wind gust (mph)
    22
    27
    28
    28
    28
    26
    21
    12
    13
    Visibility (description)
    P
    P
    P
    P
    P
    M
    G
    M
    P
    Humidity
    97%
    97%
    97%
    96%
    96%
    89%
    76%
    91%
    94%
    UV - - - 1 1 2 1 - -
    Wednesday (14 October 2026)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Mist Mist Sunny intervals Cloudy Sunny intervals Sunny intervals Mist Mist
    Chance of precipitation
    <5%
    10%
    20%
    30%
    40%
    30%
    30%
    30%
    Temperature (°C)
    10°
    11°
    11°
    13°
    14°
    13°
    11°
    11°
    Feels like temperature (°C)
    8°
    9°
    9°
    11°
    12°
    12°
    10°
    9°
    Wind direction and speed (mph)
    SW
    6
    SSW
    7
    SW
    9
    SW
    10
    SW
    13
    SW
    10
    SW
    8
    SW
    8
    Wind gust (mph)
    17
    23
    28
    30
    28
    24
    19
    22
    Visibility (description)
    P
    P
    P
    M
    G
    G
    G
    M
    Humidity
    95%
    94%
    94%
    91%
    86%
    87%
    92%
    94%
    UV - - 1 1 2 1 - -

    UK video forecast

    Glasfynydd (Usk Reservoir) weather map

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    Wales weather forecast

    Headline:

    Turning milder, though wet and blustery.

    This Evening and Tonight:

    Cloudy with persistent rain tonight, heavy at times into the early hours of Friday. Feeling much milder than last night with winds turning westerly in direction. These winds strengthening into the early hours of Friday. Minimum temperature 9 °C.

    Friday:

    Rain, sometimes heavy, will clear into the afternoon to become bright with a few scattered showers and a strong westerly breeze. Maximum temperature 17 °C.

    Outlook for Saturday to Monday:

    A chilly start on Saturday, with scattered showers, easing into Sunday alongside winds allowing for sunny spells. Cloud building into Monday, turning milder, with a chance for drizzly rain.

    Updated:

    UK long range weather forecast