Weather in Aveiro in August

Prime time. If you get to pick your dates, August is the one. Highs average 26.8 °C, lows 16.5 °C, and rain falls on 3 days — nothing in the month is working against you.

August ranks 2 of 12 in Aveiro. Only July scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain falls on only 3 days, so an itinerary with no wet-weather fallback is a reasonable risk. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: 5 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest August day reached 38.6 °C and the coldest night fell to 12.6 °C, and the wettest single day dropped 26 mm — roughly 144% of the month's rain in one day.

This is the volatile part. August rainfall has ranged from 0 mm to 75 mm across the twenty years measured — a 75 mm spread around an average of 18 mm. The average is real but almost no individual August looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 5.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 70%.

How August sits in the year

Temperatures hold steady either side: 26 °C in July, 26.8 here, 25.7 in September. Nothing about the timing within the month matters much.

Daylight in August

13.8 hours of daylight, losing 1.2 hours across the month. That is between Aveiro's extremes of 15.1 and 9.3 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 18.5 °C in August — swimmable, but it takes a moment to commit. This is the warmest the water gets all year.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, May is the trade worth considering — 14 points weaker on weather, and materially quieter.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Aveiro versus nearby

If Aveiro is one option among several, the nearby comparison is worth making. Leiria is the weaker option in August — 3.4 °C warmer, 1 day less rain. Braga is the weaker option in August — 5 °C warmer, 2 days more rain.

So: August is effectively as good as it gets here — 2 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Aveiro

See all twelve months in Aveiro, or where else to go in August.