Arcachon

Planning your day in Arcachon or just curious about the weather? In this section, you'll find current meteorological data, detailed forecasts, and helpful charts to keep you up to date with any weather changes.

The climate in Arcachon can be described as temperate, with a noticeable influence from the Atlantic Ocean. There are no sharp temperature fluctuations throughout the year, making it an attractive destination across different seasons. The weather is mild, without exhausting heat in summer or severe frosts in winter.

Arcachon experiences four distinct seasons. Summer (June–August) is the warmest and sunniest time of year, with average temperatures around 20-22°C—ideal for beach holidays and outdoor activities. Winters (December–February) are mild, with average temperatures staying around 8-10°C, allowing for comfortable exploration of the town and its surroundings. Spring and autumn are pleasant transition periods with comfortable temperatures, though with slightly more rainy days compared to summer.

A feature of the local climate is the relatively low total amount of precipitation throughout the year. However, it's worth noting that the number of rainy days can be quite significant, especially in the autumn-winter period and early spring (March). This implies frequent but usually not very heavy rain. The driest months, both in terms of rainfall volume and number of rainy days, are July and August, marking the peak of the tourist season.

Arcachon experiences a temperate marine climate with notable seasonal temperature variations. The hottest month is usually August, with an average temperature of 22.2°C and maximums reaching up to 25.9°C. July is also very warm, with an average temperature of 22.0°C. The coldest month is considered to be January, with an average temperature of 8.3°C and minimums around 6.1°C. Overall, the annual range of average temperatures spans from approximately 8°C to 22°C.

The summer months in Arcachon, from June to August, are characterized by pleasantly warm weather. Average daytime temperatures in July and August range between 25-26°C, creating comfortable conditions for relaxing on the coast. Nights remain warm, with temperatures rarely falling below 16-18°C. Daily temperature fluctuations in summer are moderate, with a difference of about 7-8°C between the maximum and minimum, making evenings quite warm yet fresher than the daytime.

Winter in Arcachon, covering the period from December to February, is known for its mildness. Average temperatures in January, the coldest month, hover around 8.3°C, with daytime highs around 10.5°C and nightly lows around 6.1°C. Frost is rare here. February is slightly warmer, with average values around 9.6°C. The difference between day and night temperatures in winter is typically smaller than in summer, at about 4-6°C, indicating more stable cool weather throughout the day.

Precipitation in Arcachon is distributed throughout the year, though with noticeable variations in amount and frequency. There is no pronounced rainy season or long dry period; however, summer months are generally drier. Given the moderate temperatures year-round, precipitation falls mainly as rain. A characteristic feature is that even in months with many rainy days, the total amount of precipitation remains low, indicating frequent but usually light or brief showers.

The highest number of rainy days occurs in December, reaching 16, with about 4 mm of precipitation. November (14 rainy days, 4 mm) and March (15 rainy days, 3 mm) are also quite wet in terms of frequency. Interestingly, June, despite being a summer month, also stands out with a relatively high amount of precipitation (4 mm) and 14 rainy days, making it one of the wettest months by volume alongside November and December.

The driest month of the year is July, with an average of only 1 mm of precipitation and the number of rainy days dropping to 7. August is also among the driest periods, with 2 mm of rainfall and approximately 8 rainy days. During these summer months, the chance of catching sunny weather is significantly higher, although brief showers are still possible.

When planning a trip to Arcachon, it's important to consider its coastal climate, which dictates your wardrobe choices year-round. In summer, from June to August, when average temperatures hover around 20-22°C and highs can reach 26°C, your suitcase should include light clothing: T-shirts, shorts, sundresses, and, of course, swimwear. Be sure to pack sunscreen, a hat, and sunglasses for protection from the strong sun. Even on warm summer evenings, a light sweater or wrap might come in handy.

During the shoulder seasons—spring (March–May) and autumn (September–November)—the weather in Arcachon becomes more changeable, with average temperatures ranging from 11°C to nearly 20°C. Layering is key during this time: T-shirts, long-sleeved shirts, sweaters, and a windbreaker or light jacket will help you adapt to temperature changes throughout the day. In winter (December–February), average temperatures drop to 8-10°C, so your luggage should include a warm sweater, jacket, hat, scarf, and possibly gloves. Given that the number of "wet days" is significant throughout the year (from 7 to 16 days per month), a light waterproof jacket or a compact umbrella will be reliable companions. And, naturally, comfortable walking shoes are a must-have for any season in Arcachon.