Offshore Stays

Surf Cascais in March

Surfing Cascais in March: in the main surf season, air around 14°C, sea around 14°C, 1.9 mm of rain a day on average. Wetsuit: a 4/3mm full wetsuit.

Surf season

In season

Air temperature

14°C

Sea temperature

14°C

Rain

1.9 mm/day

Wind

21 km/h avg

Average wave height

2.4 m (8 ft)

Big days (top 10%)

3.7 m (12 ft)+

Swell period

13 s

Main swell direction

From NW (315°)

What to wear: with the sea around 14°C in March, expect a 4/3mm full wetsuit.

Surf size in Cascais in March

Offshore of Cascais, waves in March average 2.4 m (8 ft), above the year-round average of 1.9 m — the 2nd biggest month of the year. One hour in ten is 3.7 m (12 ft) or bigger. The dominant swell runs at about 13 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.

March in the context of Cascais's surf season

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

Full Cascais surf and remote-work guide →

Frequently asked questions

Is March a good month to surf Cascais?
Yes — March falls in Cascais's main surf season (March–April, September–November).
How warm is the sea in Cascais in March?
About 14°C on average, which calls for a 4/3mm full wetsuit.
What is the weather like in Cascais in March?
Air temperature averages 14°C, with about 1.9 mm of rain per day and average winds of 21 km/h.
Climate: NASA POWER (MERRA-2) monthly climatology, 2001–2020. Sea temperature: NOAA Coral Reef Watch CoralTemp v3.1, 5 km monthly SST, 2015–2025 mean (nearest ocean cell). Surf season is Offshore Stays editorial. Waves: Open-Meteo Marine API, ECMWF ERA5-Ocean hourly reanalysis, 2016–2025 (offshore grid cell 38.5°N 9.5°W), retrieved 22 Oct 2026.