Swansea Weather & Climate: Best Time to Visit

The weather in Swansea changes moderately throughout the year, offering enough variation to appreciate each season. Average maximum daytime temperatures range from a comfortable 26°C (79°F) in January, the warmest time of the year, to a moderate 18°C (64°F) during cooler months like July.

At night, you can expect temperatures ranging from 21°C (70°F) in January to around 12°C (54°F) during July.

Check out our detailed temperature page for more information.

Temperature ranges by month

Swansea experiences significant rainfall throughout the year, averaging 1007 mm (40 in) of precipitation annually. While rainfall varies throughout the year, each season offers its own charm. February brings wetter days averaging 117 mm (4.6 in) of precipitation, spread over 12 rainy days.

In contrast, the driest month August experiences a drier climate, with about 57 mm (2.2 in) of rainfall spread across 10 rainy days. For more details, please visit our Swansea Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

The relative humidity is moderate throughout the year in Swansea.

The city experiences its highest humidity in January, reaching 61%. In August, the humidity drops to its lowest level at 49%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year