Click on a day for an hourly weather forecast
The temperatures in Portimao in May are comfortable with low of 16°C and and high up to 21°C.
You can expect a few rainy days in Portimao during May, but usually the weather is comfortable in May.
Our weather forecast can give you a great sense of what weather to expect in Portimao in May 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 |