Climate Insights for Concarneau

The climate in Concarneau is temperate. The average annual temperature is 13°C and approximately 882mm of precipitation falls per year. Concarneau receives a notable amount of rainfall throughout the year, including during its driest month. Concarneau is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, September. The coldest months are February, January, March, when temperatures can drop to 8°C.

Concarneau sees moderate temperature variation throughout the year, ranging from 8°C to 20°C. July is the warmest month, though highs remain moderate at 20°C with a mean of 18°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 3°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Concarneau is a moderately rainy area, receiving approximately 882mm of precipitation annually, which averages out to around 73mm per month. The wettest month is December, averaging 124mm of rainfall. November and January also tend to see above-average precipitation. The driest month is July, with just 31mm. That's 93mm 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.

Concarneau 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 August, 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. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 8km/h in winter, 6km/h in spring, 5km/h in summer, 6km/h in autumn.

It is currently summer in Concarneau, which began on June 21, 2026. Concarneau 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 July at around 20°C, while the coldest stretch bottoms out in February near 8°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Concarneau 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 47mm 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 Concarneau 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.