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Southampton weekend weather

This weekend in Southampton, England, model by model. Weekend forecasts are far enough out that the models often split — so we show you where.

Weekend

The models centre on about 25° across the weekend. Agreement is high — unusually solid for this far out.

Sat

2026-08-01 — every model, side by side
Met OfficeUKMO model
23°
Cloudy
High 23°·Low 13°·Rain
EuropeanECMWF
25°
Cloudy
High 25°·Low 13°·Rain 0%
AmericanNOAA GFS
25°
Cloudy
High 25°·Low 12°·Rain 0%

All 3 models land within 2° of each other for this day — that is a forecast you can plan on.

Sun

2026-08-02 — every model, side by side
Met OfficeUKMO model
26°
Cloudy
High 26°·Low 13°·Rain
EuropeanECMWF
26°
Cloudy
High 26°·Low 14°·Rain 0%
AmericanNOAA GFS
27°
Cloudy
High 27°·Low 15°·Rain 0%

All 3 models land within 1° of each other for this day — that is a forecast you can plan on.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±1°24° to 25°±4%49% to 53% chance
Tomorrow±2°24° to 26°±8%0% to 8% chance
Sat±2°23° to 25°models agree0% to 0% chance
Sun±1°26° to 27°models agree0% to 0% chance
Mon±4°27° to 30°±7%3% to 10% chance

The models often agree on temperature and still split on rain — and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Common questions

Will it rain this weekend?
The models are not currently showing a high weekend rain risk, and they broadly agree with each other.
How reliable is a weekend forecast?
It depends how far away the weekend is. Forecast error grows steadily with lead time, so a Saturday forecast made on Friday is far stronger than one made the previous Monday. The honest signal is model agreement: when they converge the forecast is solid, and when they spread the weekend is genuinely uncertain.

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