Black Rock Sands Porthmadog 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

Cloudy overnight with outbreaks of rain, sleet and hill snow pushing across the country. Skies clearing later, allowing temperatures to fall close to freezing and resulting in icy stretches on untreated surfaces. Coastal gales developing for a time. Minimum Temperature -1C.

Wed 19 Nov Wales

Eastern areas seeing a largely dry and sunny day after early cloud clears. Wintry showers affecting western areas. Feeling cold for all, particularly when exposed to the brisk northerly winds. Maximum Temperature 6C.

Thu 20 Nov Wales

Icy to start Thursday where wintry showers continue in the west. These easing for Friday. A change this weekend as rain moves in, allowing temperatures to increase closer to average.

Fri 21 Nov Wales

Icy to start Thursday where wintry showers continue in the west. These easing for Friday. A change this weekend as rain moves in, allowing temperatures to increase closer to average.

Sat 22 Nov Wales

Icy to start Thursday where wintry showers continue in the west. These easing for Friday. A change this weekend as 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.

Black Rock Sands Porthmadog 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

Black Rock Sands Porthmadog 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