Snowdonia National Park Weather Forecast, Gwynedd

Today 18 Nov Wales

Some early bright spells and a frost slowly clearing. Clouding over from the northwest with showery outbreaks of rain developing for the remainder of the day, the rain turning locally heavy. Continuing to feel chilly as northerly winds gradually strengthen. Maximum Temperature 9C.

Tonight 18 Nov Wales

Showers continuing through the evening and overnight, turning wintry on higher ground from the north. Lower levels could see sleet through the early hours. Brisk winds, strongest in the west. Minimum Temperature 1C.

Wed 19 Nov Wales

Early wintry showers will move away to the south. Skies brightening to give plenty of sunshine, though further wintry showers are likely to develop in the west. A cold wind. Maximum Temperature 6C.

Thu 20 Nov Wales

Staying cold with sunny spells. Wintry showers in the west slowly easing. A change into the weekend as wind and rain moves in allowing temperatures to increase closer to average.

Fri 21 Nov Wales

Staying cold with sunny spells. Wintry showers in the west slowly easing. A change into the weekend as wind and rain moves in allowing temperatures to increase closer to average.

Sat 22 Nov Wales

Staying cold with sunny spells. Wintry showers in the west slowly easing. A change into the weekend as wind and rain moves in allowing temperatures to increase closer to average.

Sun 23 Nov Wales

Atlantic weather fronts will continue to spread east bringing spells of rain or showers, potentially quite widely. Over subsequent days showery conditions will likely continue but there will be some brighter spells at times. There is also a chance of Atlantic frontal systems moving in from the west at times and temporary periods of northerly flow that may lead to some wintry showers. Temperatures will be a little below normal. A westerly dominated pattern will likely persist through to the end of November with outbreaks of rain or showers and temperatures near to or a little below normal. There could however still be some wintry showers at times in the north. Areas of low pressure may bring longer spells of rain and periods of strong winds at times.

Mon 24 Nov Wales

Atlantic weather fronts will continue to spread east bringing spells of rain or showers, potentially quite widely. Over subsequent days showery conditions will likely continue but there will be some brighter spells at times. There is also a chance of Atlantic frontal systems moving in from the west at times and temporary periods of northerly flow that may lead to some wintry showers. Temperatures will be a little below normal. A westerly dominated pattern will likely persist through to the end of November with outbreaks of rain or showers and temperatures near to or a little below normal. There could however still be some wintry showers at times in the north. Areas of low pressure may bring longer spells of rain and periods of strong winds at times.

Snowdonia National Park Weather Forecast

Today 18 Nov Wales

Tonight 18 Nov Wales

Wed 19 Nov Wales

Thu 20 Nov Wales

Fri 21 Nov Wales

Sat 22 Nov Wales

Sun 23 Nov Wales

Mon 24 Nov Wales

Temperature Forecast Met Office

Temperature Real-Time

Crug-y-Gorllwyn (Carmarthenshire) Radar

National Satellite

National Synoptic

Snowdonia National Park Temperature Statistics

November Temperature

Capel Curig Saws (26km)

Lowest 9 January, 2025

Average 2025

Highest 12 July, 2025

Lowest 17 October, 2025

Average October

Highest 13 October, 2025

Lowest 17 November, 2025

Average November

Highest 5 November, 2025

Climate (2020–Present)

Capel Curig Saws (26km)

Average Low 2020–2025

Average 2020–2025

Average High 2020–2025