See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:00
Sunrise
19:19
Sunset
Moon
Waxing Crescent
13:35
Moonrise
20:56
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
Upgrade to access real-time air quality data for Swansea.
Resources
UV Index
Humidity
Weather in Swansea today, September 16, 2026
Swansea looks damp on September 16, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. Expect a grey start, with morning cloud around 93% by 10:00. Outdoor plans early on should not rely on bright skies.
The day peaks near 17°C and cools toward 13°C. Relative humidity sits between 65% and 90%, reaching its peak around 02:00. Expect gentle winds, highest near 16:00 at 4.3 km/h.
Afternoon skies stay clogged, peaking close to 100% near 14:00. The grey theme continues rather than clearing out. Visibility holds near 32.2 km, though it can fall to 21.5 km. Expect sunrise at 07:00, sunset at 19:19, and 12 hours 18 minutes of sunlight today overall.
Overall, Swansea on September 16, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 12% and the high sits around 17°C.
Frequently asked questions about weather in Swansea
How warm does it get in Swansea?
The warmest month in Swansea is August, with average high temperatures of 18°C. The average temperature during this period is around 17°C.
How cold does it get in Swansea?
The coldest month in Swansea is January, with average low temperatures of 5°C. The average temperature during this period is around 7°C.
What is the wettest time of year in Swansea?
The wettest month in Swansea is December, with an average of 173mm of precipitation.
What is the driest time of year in Swansea?
The driest month in Swansea is April, with an average of 68mm of precipitation.
