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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Story Native weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Cardiff’s weather is typically mild and damp, shaped by its coastal position on the Bristol Channel. The live forecast above shows today’s conditions; for a reliable outlook, check the 10-day trend rather than a single day’s number.
What makes Cardiff’s weather different from other UK cities?
Cardiff sits in a rain shadow of the Welsh mountains, so it’s often drier than inland valleys but wetter than eastern England. The sea moderates temperatures: winters are less cold than in Birmingham or Glasgow, and summers stay cooler than London. Wind from the southwest brings frequent cloud, but prolonged heatwaves are rare.
How reliable are long-range forecasts for Cardiff?
Beyond 7 days, confidence drops sharply. The 10 Day Weather Forecast UK page gives a useful trend, but a 21 day weather forecast Cardiff should be treated as a broad guide only. For planning a weekend, look at the weather in Cardiff tomorrow and Cardiff weather Saturday updates from the live forecast above.
Does Cardiff ever get weather warnings?
Yes. The Met Office issues yellow or amber warnings for heavy rain and strong winds, especially in autumn and winter. Always check the live forecast above and the BBC Wales Cardiff weather feed for localised alerts.
What’s the weather in Cardiff 14 days from now?
Any 14-day forecast carries significant uncertainty. For a practical view, use the weather in Cardiff 10 days page and re-check 3–4 days ahead. The BBC weather Cardiff CF14 postcode forecast is updated hourly.
Is Cardiff rainier than Bristol?
Yes, slightly. Cardiff averages about 1,150 mm of rain per year, while Bristol gets around 900 mm. The difference is due to Cardiff’s position closer to the Welsh hills, which force moist air to rise and cool.
For other UK cities, see our UK weather hub, or check Birmingham Weather, Liverpool Weather, Glasgow Weather, Bristol Weather, and Sheffield Weather.