Weather · Cascais, Portugal
Cascais Weather in August
August in Cascais averages 23°C by day and 18°C at night, with about 2mm of rain. That makes it one of the best months to visit.
Avg high
23°C
73°F
Avg low
18°C
64°F
Rainfall
2mm
#12 wettest of 12
What to pack
Summer clothes by day; a light layer for evenings. Rain is unlikely to interrupt your plans.
Timing a trip around the weather? A Local Friend in Cascais builds it around the season for you.