Vannes weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Fair
Best time to visit: July – August
What is the weather like in Vannes in August?
In August, Vannes is warm: daytime highs average 22 °C, and nights cool down to about 15 °C. The sea averages 18.3 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 7 hours a day. Rain falls on about 8 days, adding up to 45 mm. All in all, August is a so-so month for a holiday in Vannes.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 49 | 52 | 35 |
| Day | 22° | 22° | 20° |
| Night | 15° | 15° | 14° |
| Sea | 18° | 18° | 17° |
| Sun | 8 h | 7 h | 7 h |
| Rain days | 8 | 8 | 8 |
More details for August
- Daylight
- 14 h 21 min07:06 – 21:26
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 54 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Time zone
- UTC+2Europe/Paris
How the score comes together
- Temperatureweight 35 %53 %
- Seaweight 25 %19 %
- Sunshineweight 20 %72 %
- Few rainy daysweight 20 %71 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in August
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Vannes in August: quick answers
Is Vannes hot in August?
Warm rather than hot: in August, daytime highs in Vannes average 22 °C and nights cool to about 15 °C. On about 1 days the thermometer climbs to 30 °C or more.
Can you swim in Vannes in August?
Only if you don't mind cold water: in August the sea averages just 18.3 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Vannes in August?
Rain falls on about 8 days, adding up to 45 mm.
Vannes month by month
The whole year in VannesAll destinations: FranceWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences