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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Norwich Wire weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Check the live forecast above before heading out in Ystalyfera today — cloud and patchy rain are expected, with temperatures remaining mild for the season in the Swansea Valley.
What is the weather like in Ystalyfera today?
The live forecast above shows a day of broken cloud with occasional light drizzle, particularly during the afternoon. Maximum temperatures should reach the low teens, typical for November in South Wales. The valley location means mist may form overnight and linger into the morning near the River Tawe. For comparison, weather Swansea often sees slightly less cloud due to its coastal position, while weather Cardiff tends to be similar but with marginally higher temperatures. For broader conditions across Britain, our UK weather hub gives a national overview.
What factors influence Ystalyfera’s climate?
Ystalyfera sits in the upper Swansea Valley at roughly 80–120m elevation, sheltered by the Brecon Beacons to the north and the moorland ridges either side. This topography reduces wind exposure compared with lower-lying areas but also traps cloud and frost, especially in winter. Rainfall is typically 1,400–1,600mm annually, making it wetter than coastal Swansea. For the most up-to-date information, the BBC Weather Ystalyfera page provides hourly breakdowns. See also our 10 Day Weather Forecast UK for a longer view.
How does Ystalyfera weather compare with nearby Swansea?
Swansea, being coastal, is typically 1–2°C milder in winter and cooler in summer than Ystalyfera, with less frost and fog. The valley traps more cloud and moisture, so Ystalyfera often feels damper.
Is Ystalyfera prone to snow and frost?
Yes, more so than the coast. The valley setting and elevation mean frost can occur from November to March, with 5–10 days of settling snow most winters, mainly in January and February.
Where can I check the latest Ystalyfera forecast?
The live forecast above is updated regularly. For additional detail, the Met Office website offers a full seven-day outlook, and BBC Weather provides hourly data for the Ystalyfera area.