Portugal in September: where is it warmest?
In September, Portimão, Algarve is the warmest place with 27 °C by day, Viana do Castelo the coolest with 22 °C. 23 of 24 destinations have good holiday weather.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rain days |
|---|---|---|---|---|---|
| Portimão, Algarve | 85 | 27° | 20° | 9 h | 3 |
| Setúbal | 82 | 27° | 19° | 9 h | 4 |
| Coimbra | 95 | 26° | – | 9 h | 6 |
| Albufeira, Algarve | 86 | 26° | 20° | 9 h | 4 |
| Fátima | 92 | 25° | – | 8 h | 6 |
| Cascais | 76 | 25° | 19° | 8 h | 4 |
| Aveiro | 73 | 25° | 18° | 8 h | 6 |
| Amadora | 97 | 24° | 19° | 8 h | 4 |
| Porto | 90 | 24° | 17° | 8 h | 7 |
| Guimarães | 90 | 24° | – | 8 h | 7 |
| Braga | 89 | 24° | – | 8 h | 7 |
| Olhão | 87 | 24° | 21° | 9 h | 3 |
| Faro | 86 | 24° | 21° | 9 h | 4 |
| Lagos, Algarve | 79 | 24° | 20° | 9 h | 3 |
| Lisbon | 97 | 23° | 19° | 8 h | 4 |
| Sintra | 96 | 23° | – | 8 h | 4 |
| Funchal, Madeira | 86 | 23° | 24° | 7 h | 8 |
| Ponta Delgada, Azores | 81 | 23° | 23° | 7 h | 10 |
| Sagres | 71 | 23° | 20° | 9 h | 3 |
| Óbidos | 67 | 23° | 19° | 8 h | 5 |
| Figueira da Foz | 64 | 23° | 18° | 8 h | 6 |
| Nazaré | 63 | 23° | 19° | 8 h | 5 |
| Angra do Heroísmo | 65 | 22° | 23° | 7 h | 9 |
| Viana do Castelo | 47 | 22° | 17° | 8 h | 7 |
Portugal in September: quick answers
Portugal in September: where is it warmest?
The warmest places in September are Portimão, Algarve (27 °C), Setúbal (27 °C) and Coimbra (26 °C).
Portugal in September: where is the sea warmest?
The sea is warmest at Funchal, Madeira (24 °C), Ponta Delgada, Azores (23 °C) and Angra do Heroísmo (23 °C).
Portugal in September: where is the weather best?
The best holiday weather in September – warm, sunny and dry – is in Amadora, Lisbon 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