Climate Insights for Swanage

The climate in Swanage is temperate. The average annual temperature is 12°C and approximately 927mm 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 February, January, March, when temperatures can drop to 6°C. Light snow can occur between January and March.

Swanage sees moderate temperature variation throughout the year, ranging from 6°C to 19°C. August is the warmest month, though highs remain moderate at 19°C with a mean of 17°C. February is the coolest month, with minimum temperatures around 6°C and an average of 7°C. Daily temperature variation is modest, with an average difference of 3°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 927mm of precipitation annually, which averages out to around 77mm per month. The wettest month is December, averaging 113mm of rainfall. November and October also tend to see above-average precipitation. The driest month is July, with just 43mm. That's 70mm less than December, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Light snowfall can occur between January and March, totalling around 7cm annually. March is the snowiest month with approximately 4cm.

Swanage is relatively calm, with an average annual wind speed of 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.

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 19°C, while the coldest stretch bottoms out in February near 6°C. Summer is next, beginning on June 21, 2026 — 3 days from now.

The best time to visit Swanage is during June, 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 62mm per month. By contrast, February can be quite cold with temperatures dropping to 6°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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.