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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 the current conditions and the next few hours for Blackwood, updated automatically. Use it to check today’s chance of rain, wind speed, and the temperature trend before heading out in the Sirhowy Valley.
How should I read the live forecast for Blackwood?
The widget above displays the current temperature, wind direction and speed, and the chance of precipitation for the next few hours. The hourly breakdown is most useful for planning walks in the nearby Cefn Fforest or trips into Caerphilly town. The “feels like” temperature accounts for the valley’s shelter and any breeze from the south-west.
What is Blackwood’s typical climate through the seasons?
Blackwood has a maritime climate, mild and damp year-round. Winters are cool, with daytime highs rarely falling below freezing, though frost is common in the valley on clear nights. Rainfall is spread across the year, with autumn and winter the wettest periods. Summers are warm but not hot, with occasional humid spells. The prevailing south-westerly wind brings frequent cloud and rain from the Atlantic.
How do local geography and the valley affect the weather?
Blackwood sits in the Sirhowy Valley, surrounded by hills that shelter it from the strongest winds but can trap mist and low cloud. The valley floor is often a few degrees cooler than the hilltops at night. Rain can be heavier here than in coastal areas because moist air rises over the hills. The urban area creates a slight heat island effect, keeping overnight temperatures a little higher than in the surrounding countryside.
When is the best time to visit Blackwood, and what should I pack?
Late spring (May to June) and early autumn (September) offer the most settled weather, with longer daylight hours and fewer heavy downpours. Pack a waterproof jacket and layers all year round. In summer, bring a light jumper for cooler evenings. In winter, a warm coat, hat, and sturdy shoes are essential for the valley paths. An umbrella is useful but can be useless in the gusty winds that funnel through the town.
Which nearby areas do readers also check?
People viewing the Blackwood forecast often look at conditions in Caerphilly, Pontypridd, and Cwmbran for a broader picture of the region. The Ebbw Vale and Pontypool forecasts are useful for those heading further into the valleys, while Nelson is a short drive north and often shares the same weather pattern.
What will the weather be in Blackwood tomorrow?
Check the live forecast above for the most accurate hourly breakdown. Tomorrow’s conditions in Blackwood typically follow the same pattern as today, with cloud, a chance of rain, and a moderate south-westerly breeze. The valley can keep mist later into the morning.
What is the 10 to 14 day outlook for Blackwood?
Long-range forecasts for Blackwood are less reliable due to the valley’s local effects. The 10-day forecast on this site gives a general trend for temperature and rainfall. Expect alternating bands of cloud and rain, with brief drier spells between weather fronts moving in from the Atlantic.
Does it rain a lot in Blackwood?
Yes, Blackwood receives above-average rainfall for the UK, around 1,400 mm per year. The hills to the west force moist air to rise, causing frequent drizzle and showers. Rain is possible in any season, so the UK weather warnings page is worth checking before longer trips.
How does Blackwood’s weather compare to Cardiff?
Blackwood is generally cooler and wetter than Cardiff, which is closer to the coast. The valley location means less wind but more cloud and fog. Cardiff often sees slightly higher daytime temperatures, especially in summer, while Blackwood can stay several degrees cooler overnight.
For a complete overview of conditions across the country, visit the UK weather hub or browse the full list of UK towns for local forecasts.