Douglas 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
Good
Best time to visit: July – August
What is the weather like in Douglas in August?
In August, Douglas is mild: daytime highs average 16 °C, and nights cool down to about 14 °C. The sea averages 15.2 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 79 mm in total. It is often windy, with gusts of around 33 km/h. All in all, August is a good month for a holiday in Douglas.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 63 | 60 | 52 |
| Day | 16° | 16° | 15° |
| Night | 13° | 14° | 13° |
| Sea | 14° | 15° | 15° |
| Sun | 7 h | 6 h | 5 h |
| Rain days | 12 | 13 | 14 |
More details for August
- Daylight
- 14 h 58 min05:54 – 20:52
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 33 km/haverage daily peakAll months
- Cloud cover
- 67 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+1Europe/Isle_of_Man
How the score comes together
- Temperatureweight 50 %80 %
- Sunshineweight 20 %52 %
- Few rainy daysweight 30 %34 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
- Windproof jacket
Douglas in August: quick answers
Is Douglas hot in August?
No. In August, Douglas is mild: daytime highs average 16 °C and nights drop to about 14 °C.
Can you swim in Douglas in August?
Only if you don't mind cold water: in August the sea averages just 15.2 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Douglas in August?
Rain is frequent, with about 13 rainy days and 79 mm in total.
Douglas month by month
The whole year in DouglasAll destinations: Isle of ManWhere 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