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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the DailyCity weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Treherbert, in the Rhondda Fach valley, sees a damp and cloudy start today according to the live forecast above, with rain likely pushing in from the coast near Porthcawl by mid-afternoon. Temperatures will stay cool for inland Rhondda Cynon Taf, so keep a coat handy if you’re heading up towards the Bwlch.
Will the rain clear for the evening?
The live forecast above shows the band of rain lingering into the early evening, but it should ease after dusk. Overnight, low cloud will cling to the valley sides, with mist forming around Treherbert and down towards Treorchy. Winds stay light from the south-west, so don’t expect a dramatic clearance until Friday morning.
What about the weekend outlook?
Saturday looks brighter for Treherbert, with drier spells and a few sunny breaks, though the 10 Day Weather Forecast UK suggests another weather front arrives by Sunday lunchtime. If you’re checking bbc weather treherbert or the met office weather treherbert pages, both point to a typical Rhondda mix of cloud and drizzle into next week.
Frequently asked questions
Is it colder in Treherbert than in Cardiff?
Yes, Treherbert sits higher in the valley than Cardiff, so temperatures here are typically 2–3°C lower. The weather cardiff forecast often shows milder conditions, especially on clear nights when cold air sinks into the Rhondda.
Where can I find a reliable 14-day forecast for Treherbert?
For a longer view, the Met Office provides a weather treherbert 14 days outlook on its site. The BBC also offers a 14-day trend, though accuracy drops beyond a week in this valley terrain.
Does Treherbert get more rain than nearby towns?
Treherbert often records slightly higher rainfall than Treorchy or Porth because it’s further up the valley, where hills force moist air to rise and condense. The live forecast above will show any localised showers.
For the wider picture across the country, visit our UK weather hub or check conditions in Bristol Weather and Sheffield Weather.