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Right now in Aveiro: partly cloudy, 20°C, feels like 21°C.
Expect a mostly clear week in Aveiro, with temperatures staying fairly steady between 14°C and 28°C.
Daytime highs this week are close to the August average of 24°C.
Sunrise: 06:57 · Sunset: 20:13 · Day length: 13h 16m
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.
| 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.
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.
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.
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.