Best time to visit Biarritz
Re-score for me — drag the dial — every chart recolours live for your heat & sea limits 27°C · sea 29°C
Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.
Default 29 °C is the Beach Climate Index "bathtub" line (Morgan et al.) — where the sea stops being refreshing and starts feeling like a warm bath.
How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.
Compare with another destination
Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.
Tours in Biarritz
12 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Biarritz).
- 1
Sea excursion at sunset - 2
Biarritz, Bayonne & Basque Country Sightseeing : Private Driving Tour - 3
San Sebastian, Bilbao & Guggenheim Tour from Biarritz - 4
Discover the essentials of the Basque coast by boat - 5
Explore the Wild Beauty of the Basque Coast by Boat - 6
Cetacean Boat Tours in the Basque Country - 7
San Sebastian, Bilbao, and Guggenheim Tour from Biarritz - 8
San Sebastian day trip from Biarritz and Bayonne - 9
Bordeaux day trip in small group from Biarritz - 10
Saint Jean de Luz Scavenger Hunt and Sights Self-Guided Tour - 11
Biarritz Scavenger Hunt and Sights Self-Guided Tour - 12
Private 3-hour Walking Tour of Biarritz with official tour guide
Last refreshed 2026-06-16.
Similar climatesSan Sebastian92% · Opatija89% · Deauville87%
Other destinations with the most-alike year-round climate to Biarritz (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Biarritz's. Based on the 2020-2024 climatology, not this year's actual weather.
Month-by-month
| Month | Temp °C | Feels °C | Rain days | Rain h | Rain h/day | Humidity | Wind km/h | Sun h | UV | Interest | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | 5–12 | 9 | 13 | 181 | 13.9 | 76% | 19 | 134 | 1 | Quiet | 5 |
| Feb | 7–14 | 12 | 12 | 162 | 13.5 | 72% | 20 | 145 | 2 | Quiet | 6 |
| Mar | 8–16 | 14 | 15 | 178 | 11.9 | 69% | 20 | 200 | 3 | Quiet | 6 |
| Apr | 9–17 | 16 | 13 | 164 | 12.6 | 67% | 19 | 210 | 5 | Quiet | 6 |
| May | 13–20 | 19 | 15 | 186 | 12.4 | 71% | 18 | 255 | 6 | Quiet | 6 |
| Jun | 16–23 | 23 | 15 | 194 | 12.9 | 73% | 18 | 245 | 6 | Quiet | 6 |
| Jul | 17–24 | 26 | 8 | 113 | 14.1 | 71% | 17 | 282 | 7 | Moderate | 8 |
| Aug | 18–25 | 27 | 11 | 142 | 12.9 | 69% | 17 | 267 | 6 | Peak | 7 |
| Sep | 16–24 | 24 | 13 | 183 | 14.1 | 68% | 17 | 222 | 5 | Moderate | 6 |
| Oct | 13–21 | 21 | 13 | 169 | 13.0 | 69% | 19 | 171 | 3 | Quiet | 7 |
| Nov | 9–16 | 15 | 14 | 196 | 14.0 | 75% | 19 | 138 | 2 | Moderate | 5 |
| Dec | 7–14 | 11 | 17 | 242 | 14.2 | 77% | 22 | 114 | 1 | Moderate | 4 |
UV Index in Biarritz by Month
UV index in Biarritz peaks at 7 (high) in July, dropping to 1 (low) in December. June, July, August have high UV — SPF 30+ and sunglasses recommended.
Best months in detail
July
8/1017–24°C (feels 26°C) · 8 rain days (113h) · 282 sun hours · 71% humidity · Moderate crowd · UV 7 (high) · sunniest 1 in 10 days reach 8 (very high)
August
7/1018–25°C (feels 27°C) · 11 rain days (142h) · 267 sun hours · 69% humidity · Peak crowd · UV 6 (high) · sunniest 1 in 10 days reach 8 (high)
October
7/1013–21°C · 13 rain days (169h) · 171 sun hours · 69% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)
Every month
Show the other 9 months in detail
January
5/105–12°C (feels 9°C) · 13 rain days (181h) · 134 sun hours · 76% humidity · Quiet crowd · UV 1 (low)
February
6/107–14°C (feels 12°C) · 12 rain days (162h) · 145 sun hours · 72% humidity · Quiet crowd · UV 2 (low)
March
6/108–16°C (feels 14°C) · 15 rain days (178h) · 200 sun hours · 69% humidity · Quiet crowd · UV 3 (moderate)
April
6/109–17°C (feels 16°C) · 13 rain days (164h) · 210 sun hours · 67% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 6 (high)
May
6/1013–20°C · 15 rain days (186h) · 255 sun hours · 71% humidity · Quiet crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 7 (high)
June
6/1016–23°C · 15 rain days (194h) · 245 sun hours · 73% humidity · Quiet crowd · UV 6 (high) · sunniest 1 in 10 days reach 9 (very high)
September
6/1016–24°C · 13 rain days (183h) · 222 sun hours · 68% humidity · Moderate crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 6 (high)
November
5/109–16°C (feels 15°C) · 14 rain days (196h) · 138 sun hours · 75% humidity · Moderate crowd · UV 2 (low)
December
4/107–14°C (feels 11°C) · 17 rain days (242h) · 114 sun hours · 77% humidity · Moderate crowd · UV 1 (low)
Frequently asked questions about visiting Biarritz
When is the best time to visit Biarritz?
July is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 17–24°C (8 rainy days). The top three months by score are July, August, October.
What is the worst time to visit Biarritz?
December is the lowest-scoring month (4/10). Typical conditions: 7–14°C (17 rainy days).
When are crowds lowest in Biarritz?
Search-interest seasonality (Google Trends 2021-2025) is lowest in February and peaks in August. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.
Which months in Biarritz have good weather but fewer tourists?
July (climate 8/10, crowd index 45) and October (climate 7/10, crowd index 38) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Biarritz by month?
UV peaks at 7 (high) in July and is lowest in December at 1 (low). Monthly peak values: Jan 1, Feb 2, Mar 3, Apr 5, May 6, Jun 6, Jul 7, Aug 6, Sep 5, Oct 3, Nov 2, Dec 1.
What is the UV index in Biarritz in July?
July is the peak UV month in Biarritz, with a daily-peak UV index of 7 (high). Apply SPF 30+, wear sunglasses, and seek shade during midday hours.
How high can UV get in Biarritz on the sunniest days?
Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. June is the worst case: typical days average UV 6 (high), but the top 10% of days reach UV 9 (very high) — and even higher. Months where the sunniest days routinely exceed the typical reading: April, May, June, July, August, September, October. Plan sun protection for the worst case, not the average.
Is air quality in Biarritz bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 1 month: February. The worst month is February with a typical-day mean of 9 µg/m³ (fair); on the worst 10% of days PM2.5 reaches 16 µg/m³ (unhealthy for sensitive) and higher. People with asthma, heart conditions, or sensitive children may want to avoid these months or limit outdoor activity. Source: CAMS via Open-Meteo.