Wet weather: 948 mm a year falls on Arcachon, more than on 83% of mainland French towns
Sunny July days climb to about 26.2°C. Its January nights stay gentler than in 72% of mainland French towns. Rain peaks in November and eases off in July. Picnics, hikes and garden evenings come into their own from May to October, with highs of 20–27°C.
Figures from Météo-France’s Cazaux station, 14 km south.
A year in Arcachon at a glance
Each month’s typical high and low in °C, at the Cazaux station.
What a year in Arcachon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Cazaux.
About 948 mm of rain a year
November is the wettest month and July the driest. About 31 days a year bring 10 mm or more. 11th wettest of 113 towns of 2,500+ in Gironde.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Cazaux
35 frosts and 71 days of 25°C a year
On about 35 nights a year the air drops to 0°C or below, and on about under 1 days it stays below freezing all day. About 71 days a year reach 25°C, and 21 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Cazaux: a frost is a night of 0°C or below, a summer day (jour d’été) 25°C or more, a hot day (forte chaleur) 30°C or more.
The Météo-France station at Cazaux
Cazaux is 14 km south of Arcachon. Every figure on this page is the station’s, not a measurement in Arcachon itself.
| Station (Météo-France number) | Cazaux (33529001) |
| Distance from the town | 14 km south |
| Station altitude | 23 m |
| Town altitude (its center) | 38 m |
| Period | 1991–2020 |
| Sunshine measured at | the same station |
TownRatings matches each commune to one station with at least 24 years of temperature and rain records: the nearest, counting every 100 m of height difference as 10 km, never across the sea.
How Arcachon compares
Against the 4,385 towns of 2,500 or more in mainland France, each read from its own matched station. The dots are the other towns of 2,500+ in Gironde.
Nearby towns’ climate
The nearest towns of 2,500+ within 29 km. Where a neighbor uses the same station its figures are the same: the differences you’d feel over a few kilometers aren’t in the normals.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Arcachon | Cazaux | 26.2°C | 2.9°C | 948 mm |
| La Teste-de-Buch 4.9 km | same station | 26.2°C about the same | 2.9°C about the same | 948 mm |
| Gujan-Mestras 7.6 km | same station | 26.2°C about the same | 2.9°C about the same | 948 mm |
| Lège-Cap-Ferret 10 km | same station | 26.2°C about the same | 2.9°C about the same | 948 mm |
| Le Teich 12 km | same station | 26.2°C about the same | 2.9°C about the same | 948 mm |
| Lanton 12 km | same station | 26.2°C about the same | 2.9°C about the same | 948 mm |
| Andernos-les-Bains 12 km | same station | 26.2°C about the same | 2.9°C about the same | 948 mm |
Arcachon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Cazaux station.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 11.2°C | 2.9°C | 7.1°C | 99 mm | 97 |
| February | 12.4°C | 2.6°C | 7.5°C | 74 mm | 117 |
| March | 15.6°C | 4.8°C | 10.2°C | 67 mm | 174 |
| April | 17.7°C | 7.0°C | 12.4°C | 73 mm | 199 |
| May | 21.2°C | 10.6°C | 15.9°C | 63 mm | 229 |
| June | 24.2°C | 13.7°C | 18.9°C | 66 mm | 244 |
| July | 26.2°C | 15.4°C | 20.8°C | 44 mm | 256 |
| August | 26.7°C | 15.2°C | 21.0°C | 61 mm | 250 |
| September | 24.1°C | 12.3°C | 18.2°C | 76 mm | 214 |
| October | 19.9°C | 9.8°C | 14.9°C | 88 mm | 153 |
| November | 14.7°C | 6.0°C | 10.4°C | 128 mm | 100 |
| December | 11.7°C | 3.7°C | 7.7°C | 109 mm | 89 |
| Year | 18.8°C | 8.7°C | 13.7°C | 948 mm | 2,121 |
Where Arcachon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Cazaux, 14 km away: statistics for 1991–2020.
- Which station: among stations with at least 24 of the 30 years of temperature and rain, the nearest to the commune’s population-weighted center, counting each 100 m of height difference as 10 km; mainland towns use mainland stations and each overseas département its own.
- Altitudes: the town’s from IGN’s RGE ALTI® at its population-weighted center; the station’s from Météo-France.
- Sunshine: the nearest station with at least 10 years of sunshine records, Cazaux, 14 km away.
- Comparisons: every town of 2,500 or more in mainland France, read the same way; the dots are the towns of 2,500+ in Gironde.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Arcachon’s climate
How warm does Arcachon get in summer?
August is the warmest month, with average highs of 26.7°C. About 71 days a year reach 25°C, more than 65% of mainland French towns, and about 21 reach 30°C.
How cold does Arcachon get in winter?
February nights average 2.6°C. The air drops to 0°C or below on about 35 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Arcachon get?
About 948 mm a year, more than 83% of mainland French towns. November is the wettest month (128 mm) and July the driest (44 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Cazaux (14 km away), averages 2,121 hours of sunshine a year.
Are these figures for Arcachon itself?
No: they are the normals of the Météo-France station matched to Arcachon, Cazaux, 14 km away. France publishes its climate normals by station, not by commune; a valley, a hill or the sea can make a difference over a few kilometers.
Where do these figures come from?
Météo-France’s fiches climatologiques: 30-year averages (1991–2020) for each of its long-running stations, published as open data since 2024. They are normals, not a forecast.
Source: Météo-France, fiches climatologiques, 1991–2020 statistics (station CAZAUX, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Arcachon →
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.