Click on a day for an hourly weather forecast
The temperatures in Porto in August are comfortable with low of 17°C and and high up to 27°C.
You can expect a few rainy days in Porto during August, but usually the weather is comfortable in August.
Our weather forecast can give you a great sense of what weather to expect in Porto in August 2025.
If you’re planning to visit Porto in the near future, we highly recommend that you review the 14 day weather forecast for Porto before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 13° / 7° | 9 | 22 | 0 | 217 mm | Bad | Porto in January |
| February | 14° / 8° | 8 | 21 | 0 | 198 mm | Ok | Porto in February |
| March | 17° / 9° | 7 | 24 | 0 | 161 mm | Ok | Porto in March |
| April | 18° / 10° | 7 | 23 | 0 | 133 mm | Ok | Porto in April |
| May | 22° / 13° | 4 | 27 | 0 | 86 mm | Good | Porto in May |
| June | 23° / 14° | 4 | 26 | 0 | 57 mm | Perfect | Porto in June |
| July | 26° / 16° | 1 | 30 | 0 | 17 mm | Perfect | Porto in July |
| August | 27° / 17° | 2 | 29 | 0 | 19 mm | Perfect | Porto in August |
| September | 26° / 16° | 3 | 27 | 0 | 65 mm | Perfect | Porto in September |
| October | 22° / 14° | 7 | 24 | 0 | 207 mm | Ok | Porto in October |
| November | 16° / 11° | 9 | 21 | 0 | 195 mm | Ok | Porto in November |
| December | 14° / 9° | 8 | 23 | 0 | 228 mm | Ok | Porto in December |