Arcachon weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Excellent
Best time to visit: July – August
What is the weather like in Arcachon in August?
In August, Arcachon is warm: daytime highs average 26 °C, and nights cool down to about 18 °C. The sea averages 21.6 °C – refreshing for a swim. The sun shines for around 8 hours a day. Rain falls on about 8 days, adding up to 51 mm. On about 6 days the thermometer climbs to 30 °C or more. All in all, August is an excellent month for a holiday in Arcachon.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 81 | 83 | 66 |
| Day | 26° | 26° | 24° |
| Night | 18° | 18° | 16° |
| Sea | 21° | 22° | 20° |
| Sun | 8 h | 8 h | 7 h |
| Rain days | 8 | 8 | 9 |
More details for August
- Daylight
- 14 h 7 min07:06 – 21:13
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 5 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 45 %on averageAll months
- Hot days
- 6 days30 °C or moreAll months
- Time zone
- UTC+2Europe/Paris
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %66 %
- Sunshineweight 20 %85 %
- Few rainy daysweight 20 %71 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in August
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Rain jacket or umbrella
Arcachon in August: quick answers
Is Arcachon hot in August?
Warm rather than hot: in August, daytime highs in Arcachon average 26 °C and nights cool to about 18 °C. On about 6 days the thermometer climbs to 30 °C or more.
Can you swim in Arcachon in August?
Yes. In August the sea averages 21.6 °C – refreshing for a swim.
Does it rain much in Arcachon in August?
Rain falls on about 8 days, adding up to 51 mm.
Arcachon month by month
The whole year in ArcachonAll destinations: FranceWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences