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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the WordPatch weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Cardiff’s weather is mild and damp year-round, with winter lows rarely below freezing and summer highs in the low 20s °C. The live forecast above shows the immediate conditions, but the city’s maritime climate means you should always expect a chance of rain, especially in autumn and winter.
When is the best time to visit Cardiff for decent weather?
Late spring (May to June) and early autumn (September) offer the most reliable balance of mild temperatures and lower rainfall. July and August are warmest but also busiest with school holidays and the highest chance of heavy showers. For a city break, May and September give you pleasant walking weather without the peak crowds.
What should I pack for a trip to Cardiff?
A waterproof jacket is essential in any season. In winter (December–February), pack layers, a warm coat and sturdy shoes; temperatures hover around 5–8°C. Summer (June–August) calls for light layers and a raincoat – you’ll rarely need more than a T‑shirt and jumper, even on warm days. The wind off the Bristol Channel can make it feel cooler, so a scarf or hat is useful in spring and autumn.
Does Cardiff get extreme weather warnings?
Yes, but rarely. The Met Office issues yellow warnings for heavy rain or strong winds a few times a year, especially in autumn and winter. Flooding can affect low-lying areas near the Taff and Ely rivers. Check the live forecast above and the UK weather hub for any active cardiff weather warning.
What is the weather in Cardiff tomorrow?
Check the live forecast above for the most accurate prediction. Cardiff’s weather changes quickly, so the 24‑hour outlook is your best guide for planning a day out or travel.
How reliable is the 14‑day forecast for Cardiff?
Long‑range forecasts (weather cardiff 14 days) give a useful trend but become less reliable after day 7. For planning, combine the live forecast above with the 10 Day Weather Forecast UK page for a balanced view.
Where can I find BBC Wales Cardiff weather?
The BBC and Met Office both provide Cardiff forecasts. The live forecast above is updated regularly, and you can also compare it with the BBC’s regional page for bbc wales cardiff weather.
For other Welsh and English city forecasts, see Bristol Weather or Liverpool Weather. The 21 day weather forecast cardiff is best used as a broad guide rather than a precise plan.