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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 shows Cwmbran’s current conditions, the next few hours and the coming days. Use the temperature, precipitation probability and wind speed to plan your day, remembering that conditions can change quickly in this valley town.
How do I read the live forecast for Cwmbran?
The live forecast above updates automatically throughout the day. The main panel gives the current temperature, cloud cover and wind. Scroll or tap the hourly or daily tabs to see how conditions will change. Pay attention to the rain icon and percentage – that tells you the likelihood of showers, which are common here. The wind arrow shows direction and speed, useful if you are walking or cycling in the valley.
What is Cwmbran’s typical climate through the seasons?
Cwmbran has a maritime climate, mild and damp year-round. Winters (December to February) are cool but rarely below freezing for long, with frequent rain and grey skies. Spring brings increasing sunshine but still unsettled. Summers are warm rather than hot, with occasional humid spells and thundery showers. Autumn sees a return to wetter, windier weather as Atlantic systems move in. Rainfall is spread fairly evenly, with autumn and winter the wettest periods. The town is sheltered from the strongest coastal winds by surrounding hills.
How do local geography and the valley affect Cwmbran’s weather?
Cwmbran sits in the Afon Lwyd valley, surrounded by hills that can trap cloud and moisture. This means fog and low cloud are more common than on the coast, especially overnight and in winter. The hills also create a rain-shadow effect for some parts of the town, but showers can be heavier on the higher ground to the north and east. The urban area generates a slight heat island, making frost less frequent than in nearby rural valleys. The Bristol Channel, about 15 miles south, moderates temperatures but also feeds moist air that often brings drizzle.
When is the best time to visit Cwmbran, and what should I pack?
Late spring (May to early June) and early autumn (September) offer the best balance of mild temperatures and lower rainfall. Summer (July and August) is popular but can be unpredictable. Pack layers and a waterproof jacket whatever the season. In winter, bring a warm coat and sturdy shoes for wet pavements and muddy paths. Sunscreen is rarely essential but useful on clear summer days. An umbrella is handy, though the wind in the valley can make it less effective than a hood.
What nearby areas do readers also check?
- Pontypool weather – just north, often a degree or two cooler.
- Blackwood weather – similar valley climate to the west.
- Caerphilly weather – slightly drier, with more urban influence.
- Abergavenny weather – colder in winter due to higher elevation.
What will the weather be in Cwmbran tomorrow?
The live forecast above gives the most accurate view for tomorrow. In general, expect a mix of cloud and rain at any time of year. Overnight lows are usually above freezing, and daytime highs vary with the season. Check the hourly breakdown for the best window of dry weather.
What is the 10 to 14 day outlook for Cwmbran?
Beyond the first few days, forecasts become less reliable. The live forecast above shows a trend – often a continuation of unsettled westerly conditions. For the longer view, see our 10-day forecast page, which updates daily with the latest model data for Cwmbran.
Does it rain a lot in Cwmbran?
Yes, Cwmbran receives above-average rainfall for the UK, typical of South Wales. Rain falls on around 150 days a year, but it is often light or drizzly rather than heavy. The wettest months are October to January. Check UK weather warnings for any flood alerts during very wet spells.
Is Cwmbran windier than nearby towns?
No, the surrounding hills shelter the valley, so Cwmbran is generally less windy than exposed coastal areas like Cardiff Bay. However, gusts can funnel down the valley during strong south-westerly storms. For detailed wind data, see the live forecast above or compare with Nelson weather and Ebbw Vale weather.
For more UK weather information, visit our national weather hub or browse all UK towns A–Z.