# Biarritz in September: weather

Biarritz, France (Europe). Ten-year climatology (2015-2024), not a forecast. Page: https://beaufixe.net/en/weather/biarritz/september

## Key figures

| Indicator | Value |
|---|---|
| Afternoon (mean daily max) | 22.9 °C |
| Night (mean daily min) | 15.6 °C |
| Sea (surface) | 21.5 °C |
| Rainy days (≥ 1 mm) | 13 / month |
| Relative humidity | 78 % |
| Probability of a 25 °C+ afternoon | 28 % |

## Month by month

| Month | Afternoon | Night | Sea | Rain (d) |
|---|---|---|---|---|
| January | 11.3 °C | 5 °C | 12.7 °C | 15 |
| February | 13.2 °C | 5.8 °C | 12.5 °C | 13 |
| March | 14.8 °C | 7.5 °C | 12.8 °C | 17 |
| April | 17 °C | 9.2 °C | 14.1 °C | 13 |
| May | 19.2 °C | 12.3 °C | 16.4 °C | 14 |
| June | 22.3 °C | 15.7 °C | 20 °C | 13 |
| July | 24.1 °C | 17.6 °C | 22.1 °C | 9 |
| August | 24.9 °C | 17.7 °C | 22.7 °C | 10 |
| September | 22.9 °C | 15.6 °C | 21.5 °C | 13 |
| October | 20.3 °C | 12.9 °C | 18.7 °C | 12 |
| November | 15.5 °C | 8.9 °C | 16.2 °C | 15 |
| December | 13.4 °C | 7.1 °C | 14.2 °C | 13 |

Best months : August, July, September.

## Before you go

- **Safety** : No specific restrictions. Usual precautions apply. (official advice updated 11 August 2026 — https://www.gov.uk/foreign-travel-advice/france)
- **Entry** (British passport) : No visa needed for stays of up to 90 days. Passport valid for at least 3 months. Schengen rules: passport issued under 10 years ago, valid 3 months after leaving; 90 days in any 180-day period; EES biometric registration at the border. (per the UK Foreign Office, 11 August 2026)
- **Vaccines** : hepatitis B if you are not already vaccinated; hepatitis A depending on activities and areas visited. Routine vaccines up to date (measles in particular).
- **Yellow fever** : No yellow fever locally, vaccine not recommended. No entry requirement.
- **Malaria** : None.
  (per the CDC, page reviewed 25 August 2026 — https://wwwnc.cdc.gov/travel/destinations/traveler/none/france)

## Sources

Air, rain, humidity: ERA5-Land reanalysis (Copernicus) served by Open-Meteo (CC BY 4.0). Sea: NOAA OISST. Safety: FCDO (OGL v3), zones reviewed by Beau Fixe. Entry: France Diplomatie (Licence Ouverte 2.0) / FCDO. Health: CDC (public domain). Details: https://beaufixe.net/en/legal#sources

Beau Fixe — https://beaufixe.net — not a forecast; only the authorities are authoritative for safety, entry rules and health.