Climate Insights for Roscoff

The climate in Roscoff is temperate. The average annual temperature is 13°C and approximately 928mm of precipitation falls per year. Roscoff receives a notable amount of rainfall throughout the year, including during its driest month. Roscoff 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 8°C.

Roscoff has relatively stable temperatures year-round, staying within a 9°C range. August is the warmest month, though highs remain moderate at 17°C with a mean of 17°C. February is the coolest month, with minimum temperatures around 8°C and an average of 9°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 2°C shift in average temperatures.

Roscoff is a moderately rainy area, receiving approximately 928mm of precipitation annually, which averages out to around 77mm per month. The wettest month is November, averaging 124mm of rainfall. January and December also tend to see above-average precipitation. The driest month is July, with just 34mm. That's 91mm less than November, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Roscoff is very windy, with an average annual wind speed of 34km/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 41km/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 14km/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 40km/h in winter, 33km/h in spring, 27km/h in summer, 34km/h in autumn.

It is currently spring in Roscoff, which began on March 20, 2026. Roscoff 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 17°C, while the coldest stretch bottoms out in February near 8°C. Summer is next, beginning on June 21, 2026 — 82 days from now.

The best time to visit Roscoff is during July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 48mm per month. By contrast, February can be quite cold with temperatures dropping to 8°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 Roscoff 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.