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Aveiro weather forecast

Right now in Aveiro: partly cloudy, 15°C, feels like 16°C.

Expect a mostly clear week in Aveiro, with temperatures staying fairly steady between 13°C and 23°C.

Daytime highs this week are close to the October average of 21°C.

Sunrise: 07:43 · Sunset: 18:58 · Day length: 11h 14m

Next 24 hours

03:00 15°
04:00 15°
05:00 15°
06:00 15°
07:00 15°
08:00 15°
09:00 16°
10:00 17°
11:00 19°
12:00 20°
13:00 21°
14:00 21°
15:00 21°
16:00 21°
17:00 20°
18:00 19°
19:00 18°
20:00 17°
21:00 17°
22:00 16°
23:00 16°
00:00 15°
01:00 15°
02:00 14°
  1. Tue 13/10 clear skies 21°15°
  2. Wed 14/10 sunny and clear 23°13°
  3. Thu 15/10 bright and clear 21°14°
  4. Fri 16/10 overcast 21°15°
  5. Sat 17/10 sunny and clear 22°14°
  6. Sun 18/10 bright and clear 21°14°
  7. Mon 19/10 light rain 23°16°

Aveiro lies flat at sea level, wrapped around its lagoon, and the Atlantic runs its weather. Summers are among the mildest of any Portuguese city: afternoons hover around 24–25 °C, kept in check by a dependable sea breeze, and heat waves that push the interior past 40 °C often leave the lagoon coast ten degrees cooler.

The price for the mild summer is a damp cool season. Rain concentrates between October and February, and on calm autumn mornings fog forms over the ria and canals before dissolving into a clear day. Winter afternoons are soft, typically 14–15 °C, and hard frost is rare this close to the water.

Climate through the year

Month Min (°C) Max (°C) Rainy days
January 7.2 14.1 12.4
February 8.2 15.7 10.3
March 9.0 16.3 13.7
April 10.9 18.3 12.3
May 13.3 20.3 9.2
June 15.4 21.8 7.5
July 16.8 24.4 2.5
August 16.7 24.4 1.9
September 15.7 23.4 5.5
October 14.1 21.3 11.9
November 10.8 17.0 14.0
December 8.7 15.2 13.7

Going by Aveiro's own averages, August is the most balanced month: highs near 24 °C and about 2 rainy days. The hottest month is July at 24 °C, and the wettest is November with 14 rainy days.

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

Why is Aveiro so much cooler than inland Portugal in summer?

The cold Atlantic sits right next to the city, and the afternoon sea breeze pulls that maritime air across the lagoon almost every day. Inland, away from the breeze, the same sunshine heats the air unchecked.

When is fog common in Aveiro?

Mostly on calm, clear mornings in autumn and winter, when moist air cools over the lagoon overnight. It usually lifts by late morning, and summer sea fog can also brush the coast early in the day.

Can you swim at the beaches near Aveiro?

Yes, Barra and Costa Nova are wide ocean beaches, but the water is brisk, around 16–18 °C even in summer. September usually has the warmest sea of the year, because the ocean lags well behind the sun.