Weather in Biarritz on 20 August 2026
Preliminary outlook for 20 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +25°C and nighttime around +18°C, average precipitation 0.3 mm, wind around 3 m/s, humidity around 75%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+19°C
Weather archive — latest year: 2025
Light rain shower
Weather archive — latest year: 2025
Nighttime: +18°C
Precipitation: 1.8 mm
Wind: 4 — 5 m/s
Humidity: 84%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +21°C | Sun hours | 4 h |
| UV index | 4 | Cloud cover (avg.) | 73% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +19°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +19°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 278° ← (W) |
Sunrise
07:17
Duration
13 h 45 min
Sunset
21:02
Moonrise
03:13
Moonset
19:39
Moon phase
Waning Crescent
Illumination
15%
+20°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +16°C
Sea temperature: +23°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 18% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +23°C |
| Feels like (avg.) | +19°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 270° ← (WNW) |
Sunrise
07:17
Duration
13 h 44 min
Sunset
21:01
Moonrise
21:36
Moonset
07:34
Moon phase
Full Moon
Illumination
100%
+22°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +20°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 81%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +24°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 12% |
| Pressure (avg.) | 766 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +23°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +23°C | Wind chill (avg.) | +22°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 281° ← (WNW) |
Sunrise
07:16
Duration
13 h 46 min
Sunset
21:02
Moonrise
11:24
Moonset
22:56
Moon phase
Waxing Crescent
Illumination
23%
+21°C
Weather archive — for 2022 year
Clear/Sunny
Weather archive — for 2022 year
Nighttime: +17°C
Precipitation: 0 mm
Wind: 2 — 4 m/s
Humidity: 79%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 14 h |
| UV index | 5 | Cloud cover (avg.) | 53% |
| Pressure (avg.) | 766 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +22°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 270° ↑ (N) |
Sunrise
07:16
Duration
13 h 46 min
Sunset
21:02
Moonrise
01:00
Moonset
16:54
Moon phase
Last Quarter
Illumination
39%
+21°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +16°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 78%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 14 h |
| UV index | 6 | Cloud cover (avg.) | 14% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +22°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 221° ↙ (WSW) |
Sunrise
07:17
Duration
13 h 45 min
Sunset
21:02
Moonrise
20:08
Moonset
04:01
Moon phase
Waxing Gibbous
Illumination
83%
+26°C
Weather archive — for 2020 year
Partly Cloudy
Weather archive — for 2020 year
Nighttime: +21°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 51%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +32°C | Sun hours | 14 h |
| UV index | 7 | Cloud cover (avg.) | 20% |
| Pressure (avg.) | 755 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +27°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 244° ↙ (SW) |
Sunrise
07:17
Duration
13 h 44 min
Sunset
21:01
Moonrise
08:21
Moonset
22:08
Moon phase
Waxing Crescent
Illumination
6%
Weather in Biarritz on 20 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+21°C
|
+18°C
|
+19°C | 4 h | 4 | 84% | 4 — 5 m/s |
| 2024 |
+23°C
|
+16°C
|
+20°C | 14 h | 5 | 78% | 3 — 4 m/s |
| 2023 |
+24°C
|
+20°C
|
+22°C | 14 h | 6 | 81% | 3 — 4 m/s |
| 2022 |
+26°C
|
+17°C
|
+21°C | 14 h | 5 | 79% | 2 — 4 m/s |
| 2021 |
+26°C
|
+16°C
|
+21°C | 14 h | 6 | 78% | 3 — 4 m/s |
| 2020 |
+32°C
|
+21°C
|
+26°C | 14 h | 7 | 51% | 2 — 3 m/s |