Is December a good month to surf Cascais?

December 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 December?

About 16°C on average, which calls for a 4/3mm full wetsuit.

What is the weather like in Cascais in December?

Air temperature averages 14°C, with about 2.1 mm of rain per day and average winds of 22 km/h.

Surf Cascais in December

Surfing Cascais in December: outside the main surf season, air around 14°C, sea around 16°C, 2.1 mm of rain a day on average. Wetsuit: a 4/3mm full wetsuit.

Surf season

Off-season

Air temperature

14°C

Sea temperature

16°C

Rain

2.1 mm/day

Wind

22 km/h avg

Average wave height

2.3 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 16°C in December, expect a 4/3mm full wetsuit.

Surf size in Cascais in December

Offshore of Cascais, waves in December average 2.3 m (8 ft), above the year-round average of 1.9 m — the 3rd 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.

December in the context of Cascais's surf season

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

Full Cascais surf and remote-work guide →

Frequently asked questions

Is December a good month to surf Cascais?: December 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 December?: About 16°C on average, which calls for a 4/3mm full wetsuit.
What is the weather like in Cascais in December?: Air temperature averages 14°C, with about 2.1 mm of rain per day and average winds of 22 km/h.