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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Media Grid UK weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Portsmouth will see a mix of cloud and sunny spells today, with a brisk south-westerly breeze. The live forecast above indicates highs near the low teens Celsius and a modest chance of light rain later in the afternoon.
What is the weather in Portsmouth today?
According to the live forecast above, cloud cover increases through the morning, bringing a 30% chance of drizzle by mid-afternoon. Winds from the southwest at 15–20 mph keep temperatures feeling cooler than the actual reading. UV index remains low, so sun protection is not required for brief outdoor time.
How does the outlook look for the rest of the week?
The weather in Portsmouth tomorrow will be similar, with a low-pressure system lingering over the Channel. For a detailed breakdown, the 10 day weather forecast UK shows gradual improvement by Thursday. Those looking further ahead can check the UK weather hub for regional trends, though 14-day and 30-day outlooks carry lower confidence.
Will it rain in Portsmouth tomorrow?
Tomorrow, the met office weather Portsmouth outlook suggests a 40% chance of light showers, mainly in the morning. Winds turn northwesterly and temperatures hold near 12°C. The afternoon should see drying conditions.
What is the best time of day for outdoor activities today?
Mid-morning offers the driest window, with cloud breaking and wind speeds lower. After 3pm the rain risk increases, so plan walks or runs before lunch for the most comfortable conditions.
Where can I find a 14-day forecast for Portsmouth?
Detailed long-range predictions are limited. For a reliable view up to 10 days, use our 10 day weather forecast UK page. Longer outlooks, like a portsmouth weather 30 days, are too uncertain for day-by-day planning.