Ystradgynlais (Powys) weather

Forecast days

Sunny intervals changing to light showers by lunchtime.
Sunrise iconSunrise:
Sunset iconSunset:
H UV
L Pollution

    7 day forecast for Ystradgynlais

    Today (31 August 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 Sunny intervals Light shower day Light shower day Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Light shower night Light shower night Light shower night Light shower night
    Chance of precipitation
    40%
    50%
    60%
    50%
    30%
    30%
    30%
    40%
    40%
    60%
    70%
    60%
    50%
    Temperature
    16°
    17°
    17°
    18°
    18°
    18°
    18°
    17°
    16°
    16°
    15°
    15°
    14°
    Feels like temperature (°C)
    14°
    15°
    15°
    15°
    15°
    15°
    15°
    15°
    14°
    14°
    14°
    13°
    13°
    Wind direction and speed
    SSW
    13
    SSW
    14
    SSW
    14
    SSW
    14
    SW
    15
    SSW
    15
    SSW
    14
    SW
    13
    SSW
    11
    SSW
    10
    S
    9
    S
    10
    S
    10
    Wind gust (mph)
    34
    36
    36
    38
    38
    37
    36
    32
    28
    27
    29
    29
    29
    Visibility
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    Humidity
    78%
    73%
    70%
    63%
    58%
    63%
    65%
    66%
    72%
    74%
    77%
    79%
    82%
    UV 4 4 6 5 4 3 2 1 1 1 - - -
    Monday (1 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 Heavy shower night Heavy shower night Heavy shower night Heavy shower night Heavy shower night Heavy shower night Heavy shower day Heavy shower day Heavy shower day Heavy shower day Heavy shower day Heavy shower day Heavy shower day Heavy shower day Light shower day Heavy shower day Heavy shower day Light shower day Sunny intervals Light shower night Light shower night Light shower night Heavy shower night
    Chance of precipitation
    70%
    80%
    80%
    90%
    90%
    ≥95%
    ≥95%
    ≥95%
    90%
    80%
    70%
    90%
    80%
    70%
    70%
    70%
    70%
    80%
    70%
    50%
    60%
    70%
    70%
    70%
    Temperature (°C)
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    13°
    14°
    14°
    15°
    16°
    16°
    17°
    17°
    17°
    17°
    16°
    16°
    15°
    14°
    14°
    13°
    13°
    Feels like temperature (°C)
    13°
    13°
    12°
    12°
    12°
    12°
    12°
    12°
    13°
    14°
    14°
    15°
    15°
    15°
    15°
    15°
    15°
    14°
    14°
    14°
    13°
    13°
    13°
    13°
    Wind direction and speed (mph)
    S
    10
    S
    10
    SSW
    9
    S
    9
    S
    9
    SSW
    9
    SSW
    8
    SSW
    7
    SW
    7
    SW
    7
    WSW
    7
    WSW
    8
    WSW
    9
    WSW
    10
    WSW
    11
    WSW
    12
    WSW
    12
    WSW
    11
    WSW
    10
    WSW
    9
    WSW
    7
    WSW
    5
    WSW
    4
    WSW
    4
    Wind gust (mph)
    29
    28
    28
    27
    27
    25
    21
    18
    18
    20
    23
    26
    29
    30
    32
    32
    31
    30
    27
    24
    17
    12
    9
    8
    Visibility (description)
    E
    E
    E
    E
    E
    E
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    85%
    87%
    90%
    92%
    92%
    94%
    95%
    96%
    95%
    94%
    90%
    86%
    79%
    76%
    73%
    69%
    72%
    73%
    76%
    80%
    83%
    86%
    87%
    88%
    UV - - - - - - 1 1 1 1 2 4 5 5 4 4 2 2 1 1 1 - - -
    Tuesday (2 September 2025)
    Time
    00:00
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Light shower night Heavy shower night Light rain Heavy rain Heavy shower day Heavy shower day Light shower day Light shower night Partly cloudy night
    Chance of precipitation
    70%
    90%
    90%
    90%
    90%
    90%
    70%
    50%
    50%
    Temperature (°C)
    13°
    13°
    13°
    13°
    14°
    17°
    17°
    16°
    14°
    Feels like temperature (°C)
    13°
    12°
    12°
    12°
    13°
    16°
    16°
    15°
    14°
    Wind direction and speed (mph)
    WSW
    4
    SW
    4
    S
    4
    SE
    5
    SE
    7
    S
    8
    SW
    8
    SW
    7
    WSW
    4
    Wind gust (mph)
    7
    8
    12
    18
    19
    19
    19
    17
    9
    Visibility (description)
    VG
    VG
    VG
    G
    G
    VG
    VG
    VG
    VG
    Humidity
    91%
    91%
    95%
    94%
    94%
    88%
    79%
    86%
    93%
    UV - - - 1 1 5 2 1 -
    Wednesday (3 September 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Partly cloudy night Light shower night Light shower day Light shower day Light shower day Light shower day Light shower night Light shower night
    Chance of precipitation
    40%
    60%
    60%
    60%
    70%
    50%
    60%
    60%
    Temperature (°C)
    13°
    13°
    13°
    15°
    17°
    17°
    16°
    14°
    Feels like temperature (°C)
    13°
    13°
    12°
    14°
    15°
    15°
    14°
    13°
    Wind direction and speed (mph)
    W
    4
    SW
    5
    WSW
    6
    SW
    9
    SSW
    11
    SW
    11
    WSW
    9
    SW
    7
    Wind gust (mph)
    9
    11
    17
    22
    24
    24
    17
    13
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    95%
    96%
    95%
    89%
    77%
    81%
    81%
    89%
    UV - - 1 2 4 2 1 -
    Thursday (4 September 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Light shower night Light shower night Light shower day Light shower day Light shower day Sunny intervals Partly cloudy night Partly cloudy night
    Chance of precipitation
    70%
    70%
    70%
    60%
    50%
    40%
    30%
    30%
    Temperature (°C)
    14°
    13°
    13°
    15°
    17°
    16°
    15°
    14°
    Feels like temperature (°C)
    13°
    12°
    12°
    13°
    14°
    14°
    14°
    13°
    Wind direction and speed (mph)
    SW
    6
    SW
    7
    SW
    8
    WSW
    10
    WSW
    13
    WSW
    13
    WSW
    11
    WSW
    7
    Wind gust (mph)
    13
    14
    21
    24
    29
    29
    23
    17
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    92%
    93%
    93%
    82%
    71%
    71%
    79%
    86%
    UV - - 1 3 5 2 1 -
    Friday (5 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 Sunny intervals Sunny intervals Partly cloudy night Cloudy
    Chance of precipitation
    20%
    20%
    20%
    20%
    20%
    20%
    20%
    20%
    Temperature (°C)
    13°
    13°
    12°
    15°
    17°
    17°
    16°
    15°
    Feels like temperature (°C)
    12°
    12°
    11°
    14°
    15°
    15°
    14°
    14°
    Wind direction and speed (mph)
    W
    7
    W
    6
    WSW
    7
    SW
    10
    SW
    12
    SW
    12
    SW
    9
    SSW
    7
    Wind gust (mph)
    14
    10
    18
    23
    24
    23
    17
    13
    Visibility (description)
    G
    G
    G
    G
    VG
    G
    VG
    G
    Humidity
    90%
    91%
    93%
    83%
    73%
    72%
    82%
    92%
    UV - - 1 3 5 2 1 -
    Saturday (6 September 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Cloudy Cloudy Cloudy Light shower day Cloudy Cloudy Overcast Drizzle
    Chance of precipitation
    30%
    30%
    40%
    50%
    50%
    50%
    50%
    50%
    Temperature (°C)
    14°
    14°
    14°
    16°
    17°
    18°
    17°
    16°
    Feels like temperature (°C)
    13°
    13°
    13°
    15°
    16°
    16°
    15°
    15°
    Wind direction and speed (mph)
    SSW
    7
    SSW
    7
    S
    8
    S
    11
    SSW
    13
    SSW
    12
    SSW
    10
    SSW
    8
    Wind gust (mph)
    11
    9
    18
    23
    25
    22
    17
    14
    Visibility (description)
    G
    G
    G
    G
    G
    G
    G
    G
    Humidity
    94%
    95%
    95%
    92%
    86%
    83%
    89%
    95%
    UV - - 1 2 3 2 1 -

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    Wales weather forecast

    Headline:

    Blustery today with a mix of sunshine and showers.

    Today:

    A day of sunshine and showers today, with the most frequent and heaviest showers likely across the west. Winds will also be strong with gales possible near northwestern coasts. Temperatures around average but feeling cool during showers. Maximum temperature 20 °C.

    Tonight:

    Showers fading for a time this evening, especially in the east, but a band of more persistent rain will gradually move across Wales overnight. Winds easing a little. Minimum temperature 13 °C.

    Monday:

    A wet start to Monday with rain giving way to a mix of sunshine and showers. The showers potentially turning heavy and thundery at times. Staying breezy, especially near coasts. Maximum temperature 20 °C.

    Outlook for Tuesday to Thursday:

    Remaining unsettled throughout with further spells of rain and showers. The rain will be heavy at times, but some drier and sunnier interludes will develop. Temperatures around average.

    Updated:

    UK long range weather forecast

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