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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Regional Report weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Ystalyfera is currently seeing the conditions shown in the live forecast above, with temperatures near that level. The day ahead will bring a mix of cloud and any lingering dampness, typical for this Swansea Valley town.
What does the forecast for Ystalyfera look like today?
The live forecast above gives the most accurate picture, but here are the key points to expect through the day:
- Cloud cover will be extensive early, with any rain likely light and patchy rather than persistent.
- Winds remain light, coming from a south-westerly direction, so temperatures will feel close to the actual reading.
- As the afternoon progresses, a few brighter breaks may develop, especially if you head slightly higher up the valley.
- Overnight, mist or low cloud could form in the valley bottom, with a chance of a touch of frost if skies clear.
How does Ystalyfera’s weather compare with nearby towns?
Ystalyfera sits in the upper Swansea Valley, so its weather often differs from the coast. The UK weather hub shows broader patterns, but locally:
- Compared to weather Swansea, Ystalyfera tends to be a couple of degrees cooler and sees more cloud and fog, especially in autumn and winter.
- When weather Cardiff is dry and bright, Ystalyfera can still be under hill cloud; conversely, it can be clearer when coastal areas have sea fog.
- The valley funnels winds, so gusts can be stronger than the general forecast suggests, particularly on exposed slopes.
Why does Ystalyfera often feel cooler than the forecast suggests?
The valley traps cold air at night and can hold onto cloud longer than surrounding hills. This means actual temperatures may be a degree or two below the regional forecast, especially in calm conditions.
Is the weather in Ystalyfera very different from the Brecon Beacons?
Yes – the Beacons are higher and exposed, so they get more rain, stronger winds and lower temperatures. Ystalyfera, being lower and sheltered, is generally milder but can be cloudier and more prone to fog.
Where can I find the most reliable forecast for Ystalyfera?
The bbc weather ystalyfera page and the Met Office provide hourly and 10-day outlooks. For detailed local data, the 10 Day Weather Forecast UK page on Regional Report also covers this area.