The weather in Portoroz in August is hot. The average temperatures are between 20°C and 29°C.
You can expect about 3 to 8 days of rain in Portoroz during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Portoroz in August 2025.
If you’re planning to visit Portoroz in the near future, we highly recommend that you review the 14 day weather forecast for Portoroz before you arrive.
Temperatures
29° / 20°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
138
mm
Sun Hours
11.5
Hrs
