Portimão, Algarve weather in May
Temperature, sea and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Good
Best time to visit: June – September
What is the weather like in Portimão, Algarve in May?
In May, Portimão, Algarve is warm: daytime highs average 24 °C, and nights cool down to about 14 °C. The sea averages 17.0 °C – bracing, so a wetsuit helps for longer swims. With around 11 hours of sunshine a day, there is plenty of sun. Rain falls on about 5 days, adding up to 26 mm. All in all, May is a good month for a holiday in Portimão, Algarve.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 14 h 8 min06:26 – 20:34
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 22 km/haverage daily peak
- Cloud cover
- 40 %on average
- Hot days
- 2 days30 °C or more
- Time zone
- UTC+1Europe/Lisbon
How the score comes together
- Temperatureweight 35 %78 %
- Seaweight 25 %0 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %92 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in May
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Portimão, Algarve in May: quick answers
Is Portimão, Algarve hot in May?
Warm rather than hot: in May, daytime highs in Portimão, Algarve average 24 °C and nights cool to about 14 °C. On about 2 days the thermometer climbs to 30 °C or more.
Can you swim in Portimão, Algarve in May?
Only if you don't mind cold water: in May the sea averages just 17.0 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Portimão, Algarve in May?
Rain falls on about 5 days, adding up to 26 mm.
Portimão, Algarve month by month
The whole year in Portimão, AlgarveAll destinations: PortugalAlgarve weather in MayWhere to go in MaySea temperature in May
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)