Tirdeunaw Weather Forecast, Swansea SA5 9

Today 18 Dec Wales

The morning should start dry, but cloud will soon thicken with increasingly wet and windy weather sweeping across the country. The rain will become heavy, but it should turn more showery later. Winds remaining brisk. A mild day though. Maximum Temperature 12C.

Tonight 18 Dec Wales

Slightly drier for some at first but another band of rain or showers will quickly spread eastwards this evening, with occasional heavy bursts. Clearer skies following overnight with scattered showers. Turning colder than last night but staying generally frost free. Minimum Temperature 4C.

Fri 19 Dec Wales

Friday brings a mixture of sunshine and scattered showers, these locally heavy. Fewer showers by the afternoon. Quite mild again but feeling cooler in the breeze, although winds easing later. Maximum Temperature 11C.

Sat 20 Dec Wales

After a mostly fine start, turning wet and windy in the west later on Saturday. Winds easing thereafter but often cloudy on Sunday and Monday with occasional rain or drizzle.

Sun 21 Dec Wales

After a mostly fine start, turning wet and windy in the west later on Saturday. Winds easing thereafter but often cloudy on Sunday and Monday with occasional rain or drizzle.

Mon 22 Dec Wales

After a mostly fine start, turning wet and windy in the west later on Saturday. Winds easing thereafter but often cloudy on Sunday and Monday with occasional rain or drizzle.

Tue 23 Dec Wales

A gradual transition to more settled conditions is expected, as high pressure builds to the north of the UK and low pressure eases away to the south. This will bring a strengthening easterly wind over the Christmas period, making it feel noticeably colder than of late. Whilst there will be a fair amount of dry weather, a few showers will still be possible, particularly across eastern and southern parts which may be wintry in places, more especially over high ground. Temperatures will likely trend below average with the potential for frost, especially in the north where winds will be lighter. Towards New Year, high pressure may become centred more towards the west of the UK, allowing a greater chance of some wet weather to spread into parts of the UK.

Wed 24 Dec Wales

A gradual transition to more settled conditions is expected, as high pressure builds to the north of the UK and low pressure eases away to the south. This will bring a strengthening easterly wind over the Christmas period, making it feel noticeably colder than of late. Whilst there will be a fair amount of dry weather, a few showers will still be possible, particularly across eastern and southern parts which may be wintry in places, more especially over high ground. Temperatures will likely trend below average with the potential for frost, especially in the north where winds will be lighter. Towards New Year, high pressure may become centred more towards the west of the UK, allowing a greater chance of some wet weather to spread into parts of the UK.

Tirdeunaw Weather Forecast

Today 18 Dec Wales

Tonight 18 Dec Wales

Fri 19 Dec Wales

Sat 20 Dec Wales

Sun 21 Dec Wales

Mon 22 Dec Wales

Tue 23 Dec Wales

Wed 24 Dec Wales

Temperature Forecast Met Office

Temperature Real-Time

Crug-y-Gorllwyn (Carmarthenshire) Radar

National Satellite

National Synoptic

Tirdeunaw Temperature Statistics

December Temperature

Pembrey Sands Samos (29km)

Lowest 4 March, 2025

Average 2025

Highest 12 August, 2025

Lowest 21 November, 2025

Average November

Highest 5 November, 2025

Lowest 4 December, 2025

Average December

Highest 9 December, 2025

Climate (2020–Present)

Pembrey Sands Samos (29km)

Average Low 2020–2025

Average 2020–2025

Average High 2020–2025