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Live forecasts update automatically; written guidance last reviewed 13 June 2026 by the Insight Britain weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The live forecast above provides the current conditions, hourly breakdown and seven-day outlook for Caerphilly. Use the tabs to switch between views; the widget updates automatically from Met Office data, so you always see the most recent observations for the town.
How should I read the live forecast for Caerphilly?
The live forecast above shows temperature, wind speed and direction, humidity, and precipitation probability. For Caerphilly, pay particular attention to the wind arrow — the town sits in a valley, so gusts can funnel through the urban area. The rain radar overlay is useful for spotting incoming showers from the Bristol Channel.
What is Caerphilly’s typical climate through the seasons?
Caerphilly has a maritime climate, mild and damp year-round. Winters (December to February) see daytime highs in the low single digits Celsius, with frost common in the surrounding hills. Rainfall is frequent but not heavy; snow settles only a few days each year. Spring (March to May) is changeable, with temperatures rising gradually and April often the driest month. Summers (June to August) are cool, with highs rarely exceeding 22°C, and occasional warm spells. Autumn (September to November) brings increasing wind and rain, especially from October.
How do local geography and the valley affect Caerphilly’s weather?
Caerphilly lies in the Rhymney Valley, sheltered by hills to the north and west. This valley location can trap cold air on clear nights, leading to mist and frost. The proximity to the Bristol Channel, about 12 miles south, means moist air often sweeps inland, producing cloud and drizzle. The hills to the north can enhance rainfall, so the town sometimes sees more precipitation than coastal Cardiff.
When is the best time to visit Caerphilly, and what should I pack?
Late spring (May) and early autumn (September) offer the most settled weather, with milder temperatures and fewer rain days. Pack layers: a waterproof jacket and sturdy shoes are essential year-round. In summer, bring a light jumper for cooler evenings; in winter, a warm coat, hat and gloves are advisable for walks around the castle.
Which nearby areas should I also check?
Readers often compare Caerphilly with Cardiff, which is slightly milder and less prone to valley fog. Other nearby towns include Pontypridd, Nelson and Blackwood, all in similar valley settings. For coastal conditions, see Penarth or the Wales hub for regional overviews.
What will the weather be in Caerphilly tomorrow?
Scroll to the daily forecast in the live forecast above and select tomorrow’s date. The widget shows the expected high and low, wind speed, and chance of rain hour by hour. For Caerphilly, tomorrow’s weather often follows the same pattern as today, with cloud and occasional drizzle.
What is the 10 to 14 day outlook for Caerphilly?
The live forecast above includes a seven-day view. For a longer outlook, visit the 10-day forecast page, which provides a general trend. Beyond seven days, confidence drops; expect broad patterns such as unsettled or settled conditions rather than precise temperatures.
Does it rain a lot in Caerphilly?
Yes, Caerphilly receives above-average rainfall for the UK, around 1,150 mm per year. Rain falls on roughly 150 days annually, but heavy downpours are uncommon. The town’s valley location means it can be cloudier and wetter than nearby Cardiff, especially in autumn and winter.
Where can I find weather warnings for Caerphilly?
The UK weather warnings page lists all active alerts from the Met Office. Caerphilly is most likely to see yellow warnings for rain and wind, particularly during autumn and winter storms. Check this page before travel if severe weather is forecast.