Click on a day for an hourly weather forecast
The weather in Portimao in September is hot. The average temperatures are between 20°C and 25°C.
You can expect a few rainy days in Portimao during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Portimao in September 2025.
If you’re planning to visit Portimao in the near future, we highly recommend that you review the 14 day weather forecast for Portimao before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 11° | 2 | 29 | 0 | 24 mm | Good | Portimao in January |
| February | 16° / 11° | 2 | 26 | 0 | 26 mm | Good | Portimao in February |
| March | 17° / 12° | 2 | 29 | 0 | 32 mm | Good | Portimao in March |
| April | 18° / 14° | 2 | 28 | 0 | 25 mm | Good | Portimao in April |
| May | 21° / 16° | 1 | 30 | 0 | 15 mm | Good | Portimao in May |
| June | 23° / 18° | 0 | 30 | 0 | 3 mm | Perfect | Portimao in June |
| July | 25° / 19° | 0 | 31 | 0 | 1 mm | Perfect | Portimao in July |
| August | 26° / 20° | 0 | 31 | 0 | 2 mm | Perfect | Portimao in August |
| September | 25° / 20° | 1 | 29 | 0 | 8 mm | Perfect | Portimao in September |
| October | 22° / 18° | 2 | 29 | 0 | 30 mm | Good | Portimao in October |
| November | 18° / 15° | 2 | 28 | 0 | 38 mm | Good | Portimao in November |
| December | 17° / 13° | 2 | 29 | 0 | 40 mm | Good | Portimao in December |