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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 ·
Check the live forecast above before heading out in Blackwood, as conditions can shift quickly with the surrounding hills. The town’s inland Valleys location means it often feels cooler and wetter than coastal spots, so layering up and carrying a waterproof is a sensible habit year-round.
When is the best time to visit Blackwood?
Late spring (May to June) and early autumn (September) offer the most reliable weather for exploring the Sirhowy Valley and nearby country parks. July and August are warmest but bring the highest chance of thundery showers, while winter months from November to February are noticeably colder, with frost and fog common in the valley bottoms.
What should I pack for a trip to Blackwood?
A waterproof jacket and sturdy shoes are essential whatever the season, as even a dry morning can turn to drizzle by afternoon. In winter, add a warm coat, hat and gloves; in summer, light layers and sun cream are useful for the brighter spells. School holidays see more families out, so book accommodation early for the summer break.
How does the weather in Blackwood compare to nearby Abergavenny?
Blackwood tends to be slightly cooler and wetter than Abergavenny, as it sits deeper in the valley system. For a direct comparison, check the bbc weather abergavenny page alongside the live forecast above.
Where can I find a 14-day outlook for Blackwood?
The met office weather blackwood page provides a 14-day forecast, while the live forecast above gives the most reliable short-term view. For a longer look, the 14 day weather blackwood outlook is best used as a general trend guide.
Is the BBC 7-day forecast for Blackwood reliable?
The bbc weather blackwood 7 days forecast is a solid planning tool, but conditions in the Valleys can change locally. Always cross-check with the live forecast above on the day of travel for the most accurate timing of rain and wind.
For more UK travel weather, see our UK weather hub or check conditions in Bristol and Glasgow.