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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Southampton Wire weather desk. Data from national met services via Open-Meteo.
Southampton and the central south coast are under a moderate rainfall warning from 6am Friday to 6pm Saturday, with 15–25 mm expected widely and up to 40 mm on higher ground, likely causing localised flooding and travel delays.
What areas are affected and when?
The Met Office warning covers Hampshire, West Sussex, Dorset and parts of Wiltshire, extending inland from the Solent coast. Rain arrives early Friday, heaviest through Friday night, easing Saturday afternoon. Similar weather warnings are in place for southern England, while separate alerts for snow affect Scotland and northern England – a reminder that storm to hit Britain this weekend brings a mix of hazards. Check the 10 day weather forecast UK for your local breakdown.
What does “moderate” mean in practice?
A moderate rainfall warning (often called yellow) indicates possible disruption: standing water on roads, slower journey times and a risk of minor surface-water flooding. Unlike an amber weather warning meaning higher likelihood of travel chaos, this alert urges caution rather than avoidance. The moderate rainfall warning map shows the band stretching from Devon to Kent, with Southampton near the centre. For London commuters, the moderate rainfall warning london has been downgraded, but coastal areas remain under greater risk.
Is a moderate rainfall warning the same as a yellow warning?
Yes – the Met Office uses a three-tier system (yellow/amber/red). Yellow is the lowest level and indicates that while weather is unlikely to be dangerous, you should plan ahead for possible disruption. Amber and red mean higher risk.
Should I cancel travel plans?
Not necessarily, but allow extra time if driving on the M27, A27 or rural roads near the New Forest. Check local flood warnings via the Environment Agency and avoid driving through standing water. Train services may see speed restrictions.
Will this affect the rest of the UK?
Yes – met office snow warning covers northern Scotland, while weather warning scotland includes ice and snow. Storm warnings uk today are active for the whole country, but the south‑coast focus remains on rain. Check regional updates for your area.