Home › Weather › Ystradgynlais Weather
Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Civic Insight weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Check the live forecast above for Ystradgynlais before heading out, as conditions in the upper Swansea Valley can shift quickly with the surrounding Brecon Beacons influence. This page gives you a clear, local snapshot for planning your day.
What is the weather like in Ystradgynlais today?
Ystradgynlais sits in a sheltered valley, so it often feels cooler than nearby towns like Neath or Swansea, especially in the morning. The live forecast above shows the immediate trend, but expect cloud to build from the west during the afternoon, with a chance of light drizzle on higher ground. Winds are usually light here, thanks to the hills.
How does the local geography affect the forecast?
Being inland and surrounded by the Brecon Beacons National Park, Ystradgynlais can trap mist and frost in winter, while summer afternoons may bring sudden, short downpours as air rises over the hills. For a wider view of conditions across Wales, check the UK weather hub or the 10 Day Weather Forecast UK.
Is Ystradgynlais likely to see snow this winter?
With its valley position and elevation, Ystradgynlais can get a few days of snow each winter, often when cold air settles. The Met Office provides the most reliable long-range guidance for this area.
Where can I find the latest Met Office forecast for Ystradgynlais?
For detailed hourly data and warnings, the met office weather ystradgynlais page is the authority. You can also check BBC Weather for a quick overview, which uses Met Office data.
Does the wind pick up much in Ystradgynlais?
Generally no — the surrounding hills shield the town. Strong winds are rare unless a deep low-pressure system crosses Wales, in which case exposed spots like the A4067 might feel gusty. For regional updates, see Bristol Weather or Liverpool Weather.