Climate Insights for Swanage

The climate in Swanage is temperate. The average annual temperature is 12°C and approximately 908mm of precipitation falls per year. Swanage receives a notable amount of rainfall throughout the year, including during its driest month. Swanage is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, March, when temperatures can drop to 7°C.

Swanage sees moderate temperature variation throughout the year, ranging from 7°C to 18°C. August is the warmest month, though highs remain moderate at 18°C with a mean of 17°C. January is the coolest month, with minimum temperatures around 7°C and an average of 8°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows. The sharpest temperature change occurs between October and November, with a 3°C shift in average temperatures.

Swanage is a moderately rainy area, receiving approximately 908mm of precipitation annually, which averages out to around 76mm per month. The wettest month is October, averaging 119mm of rainfall. November and December also tend to see above-average precipitation. The driest month is April, with just 40mm. That's 80mm less than October, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Swanage is very windy, with an average annual wind speed of 33km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 39km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in June, with average winds dropping to 27km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 12km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 38km/h in winter, 31km/h in spring, 28km/h in summer, 35km/h in autumn.

It is currently spring in Swanage, which began on March 20, 2026. Swanage is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 18°C, while the coldest stretch bottoms out in January near 7°C. Summer is next, beginning on June 21, 2026 — 86 days from now.

The best time to visit Swanage is during July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 64mm per month. By contrast, January can be quite cold with temperatures dropping to 7°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Swanage based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.