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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Public Report weather desk. Data from national met services via Open-Meteo.
The 16-day outlook for the UK shows temperatures ranging from 6°C to 14°C, with a 60–70% chance of unsettled conditions across northern and western regions. Southern and eastern areas will see drier, milder spells, though confidence decreases beyond day 10.
What does the 16-day forecast show for the UK?
For the first week (days 1–7), low pressure dominates north-west Britain, bringing rain and brisk winds to Scotland, Northern Ireland and north-west England. Daytime highs reach 10–14°C in the south, 6–10°C in the north. During the second week (days 8–16), a more blocked pattern may develop: drier conditions become more likely in the south-east, while western regions stay changeable. The 16 day weather London outlook suggests highs near 12–14°C with occasional rain, but the signal weakens after day 12.
How reliable is a 16-day forecast?
Beyond 7 days, accuracy drops sharply. The Met Office rates day 8–10 forecasts as moderate confidence (50–60%), and day 11–16 as low confidence (30–40%). For users seeking a long range weather forecast 30 days, the 10 Day Weather Forecast UK offers higher reliability. Similarly, a bbc weather 21 day forecast should be treated as a broad trend, not a precise prediction. We recommend checking our UK weather hub for daily updates.
Is a 16-day forecast accurate for planning a trip?
It gives a useful trend but not day-by-day certainty. For travel within 7 days, use the 10 Day Weather Forecast UK. For longer, a 21 day weather forecast London or 30 day weather forecast uk can indicate broad patterns, but check updates 48 hours before departure.
What’s the difference between a 16-day and a 30-day forecast?
A 16-day forecast uses ensemble models with moderate skill to day 10. A 30 day weather forecast uk is a seasonal outlook showing average conditions, not daily details. Both are less reliable than short-range forecasts.
Can I get a 16-day forecast for a specific city?
Yes. Our city pages like Birmingham Weather, Glasgow Weather, and Bristol Weather include 16-day outlooks. The 16 day weather London page gives a detailed breakdown for the capital.