Portimão, Algarve 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
Excellent
Best time to visit: June – September
What is the weather like in Portimão, Algarve in August?
In August, Portimão, Algarve is hot: daytime highs average 30 °C, and nights cool down to about 19 °C. The sea averages 19.7 °C – bracing, so a wetsuit helps for longer swims. With around 11 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 17 days the thermometer climbs to 30 °C or more. All in all, August is an excellent month for a holiday in Portimão, Algarve.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 83 | 85 | 85 |
| Day | 30° | 30° | 27° |
| Night | 19° | 19° | 18° |
| Sea | 19° | 20° | 20° |
| Sun | 12 h | 11 h | 9 h |
| Rain days | 0 | 0 | 3 |
More details for August
- Daylight
- 13 h 38 min06:50 – 20:28
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or more
- Wind
- 22 km/haverage daily peak
- Cloud cover
- 20 %on average
- Hot days
- 17 days30 °C or more
- Time zone
- UTC+1Europe/Lisbon
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %39 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %100 %
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
- Light, breathable clothes
- Water bottle – drink plenty
Portimão, Algarve in August: quick answers
Is Portimão, Algarve hot in August?
Yes. In August, Portimão, Algarve is hot: daytime highs average 30 °C and nights stay around 19 °C. On about 17 days the thermometer climbs to 30 °C or more.
Can you swim in Portimão, Algarve in August?
Only if you don't mind cold water: in August the sea averages just 19.7 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Portimão, Algarve in August?
It hardly ever rains.
Portimão, Algarve month by month
The whole year in Portimão, AlgarveAll destinations: PortugalWhere 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)