The hottest month in Grand Plage is August when the average maximum temperature is 24°, average temperature is 20° and average minimum temperature is 17°.
The coolest month in Grand Plage is February when the average maximum temperature is 12°, average temperature is 8° and average minimum temperature is 4°.
The longest days in Grand Plage are in June, with an average of 15.4 hours of daylight per day. December has the shortest days with an average of 9 hours of daylight per day.
The sunniest days in Grand Plage are in July which has the most hours of sunshine per day with an average of 9.5 hours of sunshine per day, making it a sunny month with few clouds. December has the least sunshine with an average of 2.5 hours of sunshine per day, making it not a particularly sunny month.
The ultraviolet index is the highest in June when it reaches 9.3 and lowest in December when it reaches 1.5.
An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The warmest sea water temperatures in Grand Plage are found in August when they peak at 26° and lowest in February when they dip to 13°.
The sea is best for swimming between June and December when the temperature is above 19° which is cool for swimming, shorty wetsuit may help you extend your time in the water.
The wettest month in Grand Plage is January with 1.5cm of rain and November has the most days of rain with 17.4 days with some rain, a wet time to visit the beach.
The driest month in Grand Plage is October with 0.1cm of rain and September has the fewest days of rain with 11.6 days with some rain, a slightly wet time to visit the beach.
The most humid month in Grand Plage is July with a dew point (an indicator of humidity) of 18° which is somewhat uncomfortable for most people in cities but fine on a beach.
The least humid month in Grand Plage is February with a dew point of 6° which is a bit dry for some.
The most windy month in Grand Plage is March when the average maximum windspeed is 24kmh and the average wind speed is 11kmh.
The least windy month in Grand Plage is October when the average maximum windspeed is 19kmh and the average wind speed is 9kmh.