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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the The UK Daily weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
For the most current weather in Penarth, check the live forecast above. As a coastal town on the Severn Estuary, its weather is shaped by sea breezes and Atlantic systems, making conditions often milder than inland areas of the Vale of Glamorgan.
What can you expect from Penarth’s weather today?
Penarth’s coastal position means temperatures rarely stray far from the seasonal norm. The live forecast above shows today’s conditions, and the weather in Penarth tomorrow is also available there. Generally expect a mix of cloud and sun with a moderate sea breeze. Rain arrives with Atlantic low pressure, while high pressure brings settled spells. For a longer view, the BBC Weather Penarth 7 day and 14 day forecasts are useful. The weather in Penarth 10 days ahead is on our 10-day forecast page.
How does the coastal location affect Penarth’s climate?
On the Bristol Channel, Penarth has a maritime climate – cooler in summer than nearby Cardiff, but milder in winter. Sea fog can drift in during spring and early summer. Met Office weather Penarth observations show that average conditions mirror those of Cardiff, and BBC Weather Cardiff reports similar trends, though Penarth can be slightly cooler. For the other side of the estuary, see our Bristol weather page. While a 21 day weather forecast Penarth is not reliably accurate, the 10-day forecast gives a good guide.
Is Penarth often windy?
Yes, it is exposed to south-westerly winds, especially in autumn and winter. The Bristol Channel funnels winds, making it breezier than inland. Check the live forecast for wind speeds, or see the BBC Weather Penarth 7 day forecast.
Does Penarth get snow often?
Snow is infrequent due to the mild coastal influence. When it does fall, it rarely settles, most likely in January or February during cold easterly flows. For hourly details, AccuWeather Penarth is an alternative.
What is the best time to visit Penarth for fine weather?
Late spring to early autumn offers the best chance of settled conditions. July and August are warmest, but June can be sunnier. The live forecast and BBC Weather Penarth 14 day outlook help with planning.