Portugal in May: where is it warmest?
In May, Portimão, Algarve is the warmest place with 24 °C by day, Viana do Castelo the coolest with 18 °C. 12 of 24 destinations have good holiday weather.
All destinations in May, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rain days |
|---|---|---|---|---|---|
| Portimão, Algarve | 66 | 24° | 17° | 10 h | 5 |
| Setúbal | 61 | 23° | 17° | 10 h | 5 |
| Albufeira, Algarve | 59 | 23° | 17° | 10 h | 6 |
| Coimbra | 89 | 22° | – | 9 h | 9 |
| Fátima | 88 | 21° | – | 8 h | 9 |
| Olhão | 55 | 21° | 18° | 10 h | 5 |
| Faro | 53 | 21° | 18° | 10 h | 6 |
| Cascais | 48 | 21° | 17° | 9 h | 6 |
| Lagos, Algarve | 47 | 21° | 17° | 10 h | 5 |
| Aveiro | 43 | 21° | 16° | 8 h | 9 |
| Lisbon | 97 | 20° | 17° | 9 h | 6 |
| Amadora | 97 | 20° | 17° | 9 h | 6 |
| Porto | 83 | 20° | 16° | 8 h | 11 |
| Braga | 81 | 20° | – | 8 h | 11 |
| Guimarães | 81 | 20° | – | 8 h | 11 |
| Sagres | 41 | 20° | 17° | 10 h | 5 |
| Óbidos | 40 | 20° | 16° | 9 h | 6 |
| Figueira da Foz | 35 | 20° | 16° | 8 h | 9 |
| Sintra | 97 | 19° | – | 9 h | 6 |
| Funchal, Madeira | 90 | 19° | 20° | 8 h | 7 |
| Nazaré | 37 | 19° | 16° | 9 h | 8 |
| Ponta Delgada, Azores | 84 | 18° | 18° | 8 h | 10 |
| Angra do Heroísmo | 29 | 18° | 17° | 7 h | 8 |
| Viana do Castelo | 29 | 18° | 16° | 8 h | 10 |
Portugal in May: quick answers
Portugal in May: where is it warmest?
The warmest places in May are Portimão, Algarve (24 °C), Setúbal (23 °C) and Albufeira, Algarve (23 °C).
Portugal in May: where is the sea warmest?
The sea is warmest at Funchal, Madeira (20 °C), Olhão (18 °C) and Faro (18 °C).
Portugal in May: where is the weather best?
The best holiday weather in May – warm, sunny and dry – is in Lisbon, Amadora and Sintra.
Portugal month by month
Portugal: weather & best time to visit
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