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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Culture Observer weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Southampton’s mild maritime climate means the best months for a visit are May through September, when daytime highs average 15–22°C and rainfall is at its lowest. The live forecast above will tell you what to expect this week.
When should I visit Southampton for the best weather?
May, June and September offer the sweet spot: warm enough for the Solent and New Forest without the July–August crowds. July and August are the warmest months with average highs around 22°C, but these also bring school holidays and higher prices. For the weather in Southampton tomorrow and the 14 day weather forecast Southampton, check the live forecast above or visit our 10 Day Weather Forecast UK page for a longer view.
What to pack and when to travel on a budget
Pack layers year-round. A light jacket or jumper is useful even in summer for coastal breezes; rain gear is sensible from October to March. For value, aim for May or September — the weather in Southampton 10 days out is often settled, and accommodation costs less than in peak summer. The 21 day weather forecast Southampton can help you plan further ahead, though long-range predictions are less reliable. For broader UK travel advice, see our UK weather hub.
What is the best month to visit Southampton?
May, June and September are ideal: pleasant temperatures, fewer crowds and lower prices than July–August. The southampton weather by month shows May and June average 17–20°C with the driest conditions of the year.
Does Southampton get a lot of rain?
Southampton receives around 760mm of rain annually — less than Manchester or Glasgow. Rain is spread throughout the year but October to February tends to be wettest. The southampton weather yearly pattern shows no extreme dry or wet season.
What should I pack for a weekend in Southampton?
Bring layers: a waterproof jacket, comfortable walking shoes and a mix of short and long sleeves. Even in summer, evening temperatures can drop to 12°C. The southampton weather forecast 15 days ahead can help fine-tune your packing.