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Biarritz Weather in September
During September, Biarritz experiences high daytime temperatures of 23°C (73°F) and cooler nights around 16°C (61°F). As part of the summer season, expect quite a bit of rainfall. Around 97 mm (3.8 in) is typical.
Rainfall in Biarritz in September
Past climate data indicates that roughly 13 days will see rain, totalling around 97 mm (3.8 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Biarritz in September
September is one of the better months to visit Biarritz. Expect 23°C (73°F) during the day and 16°C (61°F) at night. Experience the summer season in September. This kind of day-to-night contrast is typical for this time of year. Nights drop to around 16°C (61°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Biarritz in September
The city usually sees around 193 hours of sunlight, indicating many sunny days , a great month for sightseeing.If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Biarritz.
Biarritz Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
23°C (73°F)
Chance of Rain
42%
Precipitation
97 mm (3.8 in)
Rainy days
13 days
Humidity
80%
Sunshine
193 hours
Percentage Sunshine
Biarritz Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Biarritz - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Biarritz typically stay consistent throughout September, with daily highs averaging around 23°C (73°F). Nights are pleasant, with lows typically ranging from 13°C (55°F) to 16°C (61°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Biarritz in September
Browse day-by-day weather records for Biarritz spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Biarritz historical weather extremes in September
Based on 50 years of weather observations in Biarritz between 1976 and 2026, these are the recorded extremes.
- The warmest day in September was on September 14, 2020, with a maximum of 35°C (95°F).
- The coldest September day was on September 27, 2007, with a maximum of 14°C (57°F).
- The coldest night in September in Biarritz was on September 26, 2002, with a minimum of 5°C (41°F).
Best Places in France in September
Find out more about the weather in France and which places have the best travel conditions in this month. See all of France in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Biarritz in September
For Biarritz in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Biarritz in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling9/10 -
Walking9/10 -
Camping8/10 -
Outdoor sports9/10
Biarritz 3-Day Forecast
More climate data for Biarritz
Temperature Rainfall Sunshine Humidity
See the full Biarritz climate overview or explore weather in France.
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Where to go in September - average daytime high across popular destinations.
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