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Nazaré weather forecast and sea temperature

Right now in Nazaré: cloudy, 20°C, feels like 22°C.

Expect a mostly clear week in Nazaré, with temperatures staying fairly steady between 16°C and 27°C.

Daytime highs this week are close to the August average of 23°C.

Sunrise: 07:00 · Sunset: 20:14 · Day length: 13h 13m

Nazaré sea temperature today

Sea water: 20.3°C, cooling slightly to around 20°C over the coming days

Wave height: 2.5m (min 0.9m on 2026-09-03, max 2.5m on 2026-08-28)

Nazaré water temperature for the next 7 days · Sea temperature along the whole coast

Next 24 hours

22:00 20°
23:00 19°
00:00 19°
01:00 19°
02:00 19°
03:00 18°
04:00 18°
05:00 18°
06:00 18°
07:00 18°
08:00 18°
09:00 19°
10:00 20°
11:00 21°
12:00 22°
13:00 22°
14:00 23°
15:00 23°
16:00 22°
17:00 22°
18:00 22°
19:00 22°
20:00 21°
21:00 20°
  1. Fri 28/08 clear skies 22°16°
  2. Sat 29/08 sunny and clear 23°18°
  3. Sun 30/08 bright and clear 23°19°
  4. Mon 31/08 overcast 22°18°
  5. Tue 01/09 partly cloudy 22°19°
  6. Wed 02/09 a mix of sun and cloud 22°19°
  7. Thu 03/09 clear skies 27°18°

Nazaré is where the Atlantic shows off. An underwater canyon deeper than the Grand Canyon points straight at Praia do Norte and focuses incoming swell into the biggest waves ever surfed, walls of water that can top 20 m when large winter storms send their energy across the ocean. The town beach, facing south behind the headland, lives a far calmer life.

Day to day, the climate is classic central Portuguese coast: summers around 22–25 °C with a regular afternoon breeze and the occasional morning sea fog, winters mild at 14–15 °C with rain arriving in Atlantic spells. The sea itself stays cool all year, typically 16–18 °C even in late summer.

Climate through the year

Month Min (°C) Max (°C) Rainy days
January 9.1 14.6 10.6
February 9.9 15.7 9.3
March 10.5 16.2 12.9
April 12.1 17.7 13.1
May 14.2 19.6 8.1
June 16.2 20.9 8.0
July 17.3 22.6 4.2
August 17.5 23.0 2.5
September 16.7 22.6 5.3
October 15.4 21.2 11.0
November 12.4 17.4 13.3
December 10.4 15.7 12.1

Going by Nazaré's own averages, August is both the warmest and the most balanced month: highs near 23 °C and about 3 rainy days. The wettest is November with 13 rainy days.

Averages for 2016–2025. A rainy day is one with at least 1 mm of precipitation.

When can you see the giant waves at Nazaré?

Roughly from October to March, when big North Atlantic storms send long-period swell toward the coast. The truly giant days happen only a few times each winter and depend on the swell forecast, which surfers watch days in advance.

Why are the waves at Nazaré so big?

The Nazaré Canyon, an underwater gorge about 5 km deep, runs almost to the shore and acts like a lens. It bends and concentrates the incoming swell onto Praia do Norte, where the amplified waves suddenly hit shallow water and rear up.

Can you swim in Nazaré in summer?

Yes, on the main town beach, which faces south and is sheltered by the headland from the biggest swell. The water is brisk at 16–18 °C, and the Atlantic still deserves respect, so keep to the flagged bathing areas.