Southampton Weather

The live forecast above gives you Southampton’s current conditions at a glance. Across the year, daytime highs range from 8°C in January to 21°C in July, with rainfall spread fairly evenly through the seasons. Southampton’s south-coast location means it frequently records milder temperatures than inland or northern UK cities.

What does the live forecast above tell you?

The widget updates in real time with observations for Southampton. It shows current temperature, wind speed and direction, humidity and the short-term outlook. Use it alongside longer-range data from the Met Office or the BBC Weather service for a fuller picture. For planning ahead, the 10-day forecast and 14-day to 21-day outlooks give useful trend indicators, though confidence decreases after day five. The live conditions above are always the most current snapshot.

How does Southampton’s climate vary through the year?

Southampton has a temperate maritime climate, similar to much of southern England but with local nuances shaped by the Solent and Southampton Water.

Spring (March to May). Daytime highs rise from about 10°C in March to 17°C by May. Rainfall is moderate, averaging 50–60mm per month. April can be changeable — a mix of bright spells and passing showers driven by Atlantic fronts.

Summer (June to August). July and August see average highs of 20–21°C, with occasional peaks above 25°C. Rainfall remains fairly consistent at 45–55mm per month. The Solent’s moderating effect keeps nights cooler than some inland areas, and sea breezes can freshen the city on warm afternoons.

Autumn (September to November). September often brings settled conditions, with highs around 18°C. By November temperatures drop to 10–12°C. Rainfall increases slightly, especially in October and November, as Atlantic systems become more frequent.

Winter (December to February). Daytime highs average 8–9°C, with overnight lows around 3–4°C. Frost is infrequent compared with inland areas. Snowfall is rare and usually light when it does occur. The maritime influence means Southampton often escapes the most extreme cold seen further north.

When is the best time to visit Southampton?

For the warmest and most reliable weather, July and August offer the highest daytime temperatures and longest daylight hours. May, June and September are also good choices, with milder conditions and fewer crowds. If you prefer cooler weather for walking or exploring, April and October can be pleasant but expect more rain. Winter visits are viable if you pack layers and a waterproof jacket; many indoor attractions remain open. Always check the live forecast above and the UK weather hub for the latest conditions before setting out.

Does Southampton have a local microclimate?

Southampton’s position at the head of Southampton Water, where the rivers Test and Itchen meet, creates a slightly sheltered environment. The city is less exposed to strong winds than coastal towns on the Isle of Wight or along the English Channel. The New Forest to the west can influence local wind patterns, and the Solent helps moderate temperature extremes. Compared with cities further north or inland — such as those covered in our Birmingham and Glasgow guides — Southampton tends to record fewer frosts and slightly warmer overnight minima. The maritime character of southern England’s weather means conditions can shift quickly, so it pays to check the live widget and any UK weather warnings before travel.

What should you pack for Southampton?

Layers are the key year-round. A waterproof jacket is useful in every season, given the evenly distributed rainfall. In summer, light clothing and a sun hat suffice for most days, but a jumper or fleece helps for evenings near the water. In winter, a warm coat, scarf and sturdy shoes are sensible. The city’s maritime climate rarely demands extreme cold-weather gear, but damp conditions can make temperatures feel cooler than the thermometer suggests.