- Clothing
- Waterproof jacket and umbrella strongly recommended.
Tomorrow's Weather Forecast - Swansea
Tomorrow's weather in Swansea. high 18°C (64°F), low 13°C (55°F). Rainy.
Tomorrow’s Outlook
Tomorrow brings a similar temperature to today. Expect heavy rain in the afternoon and evening, with rain chances climbing as high as 99%. That risk lines up with humidity averaging 89% through the day the more moisture in the air, the more readily clouds build into showers. Humidity holds around 89%, giving the air a damp, heavy feel even without much heat behind it. Winds will turn gusty at times, reaching up to 53 km/h. Sunrise is at 6:45 AM and sunset at 7:37 PM, for about 12h 52m of daylight.
- Tomorrow
- 18°/ 13°
- Today19° / 14°
Tomorrow’s Hourly Weather Outlook
Morning6 AM – Noon17°
- Rain probability
- 15%
- Wind speed
- 23 km/h
AfternoonNoon – 6 PM18°
- Rain probability
- 99%
- Wind speed
- 30 km/h
Evening6 PM – Midn18°
- Rain probability
- 95%
- Wind speed
- 21 km/h
NightMidn – 6 AM14°
- Rain probability
- 0%
- Wind speed
- 16 km/h
24-Hour Rain & Temperature Forecast
Tomorrow12 Sep
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Planning Advice for Tomorrow
- Outdoor
- Not ideal for outdoor plans or car washes — heavy rain expected.
- Travel
- Expect traffic slowdowns from wet roads. Allow extra time.
Sunrise & Sunset
Sunrise
Dawn 6:15 AMTotal Daylight
Full day forecastSolar noon 1:11 PM
Sunset
Dusk 8:07 PMvs today-4 min daylight
Sunrise shift1 min later
Sunset shift2 min earlier
5-Day Weather Forecast
Full 15-Day ForecastWeather Insight
Swansea is forecast to reach a high of 18°C tomorrow, with an overnight low around 13°C. That's 1° above the long-term average high of 17°C for this time of year. It continues a recent pattern — 24 of the last 28 days with published data have run warmer than normal. Expect a high chance of rain (99% probability) and moderate breezes averaging 30 km/h. Air quality is currently good (AQI 22), with no notable outdoor health concerns.
Today vs Normal
19°C+2° above normal
The long-term average high for today is 17°C.
24 of the last 28 days with published data ran above normal.
It continues that pattern - today's forecast is also running above normal.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air Quality
Good
Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.