Is August a good month to surf Cascais?

August is outside Cascais's main surf season (March–April, September–November), so surf is less reliable, though it can still work on the right day.

How warm is the sea in Cascais in August?

About 18°C on average, which calls for a 3/2mm full wetsuit.

What is the weather like in Cascais in August?

Air temperature averages 20°C, with about 0.2 mm of rain per day and average winds of 20 km/h.

Surf Cascais in August

Surfing Cascais in August: outside the main surf season, air around 20°C, sea around 18°C, 0.2 mm of rain a day on average. Wetsuit: a 3/2mm full wetsuit.

Surf season

Off-season

Air temperature

20°C

Sea temperature

18°C

Rain

0.2 mm/day

Wind

20 km/h avg

Average wave height

1.3 m (4 ft)

Big days (top 10%)

1.9 m (6 ft)+

Swell period

9 s

Main swell direction

From NW (315°)

What to wear: with the sea around 18°C in August, expect a 3/2mm full wetsuit.

Surf size in Cascais in August

Offshore of Cascais, waves in August average 1.3 m (4 ft), below the year-round average of 1.9 m — the 11th biggest month of the year. One hour in ten is 1.9 m (6 ft) or bigger. The dominant swell runs at about 9 seconds from the NW.

These are open-ocean figures from 10 years of hourly wave data, not a beach forecast: a sheltered break will be smaller, an exposed reef or point can be bigger.

August in the context of Cascais's surf season

Cascais's main surf season runs March–April, September–November. August is outside it.

Full Cascais surf and remote-work guide →

Frequently asked questions

Is August a good month to surf Cascais?: August is outside Cascais's main surf season (March–April, September–November), so surf is less reliable, though it can still work on the right day.
How warm is the sea in Cascais in August?: About 18°C on average, which calls for a 3/2mm full wetsuit.
What is the weather like in Cascais in August?: Air temperature averages 20°C, with about 0.2 mm of rain per day and average winds of 20 km/h.