Aveiro enjoys a mild, temperate oceanic climate with warm, sunny summers and mild, rainy winters. Summer highs reach 25–27°C, while winter lows rarely fall below 5°C. Rain falls mainly from October to March, peaking in autumn and winter, while sunshine is most abundant from May to September. The city’s coastal setting brings breezes and moderate humidity.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Aveiro, located on Portugal’s Atlantic coast, features a temperate oceanic climate with distinct but gentle seasons. Summers (June–September) are warm and pleasant, with average highs of 25–27°C and lows around 14–16°C. July and August are the sunniest and driest months, with up to 10–11 hours of sunshine daily and only 10–20 mm of rain over 2–4 days per month. Sea breezes from the northwest keep humidity moderate and temperatures comfortable, making this period ideal for beach activities and exploring the city’s canals. Fog can form at night and early morning, especially in June.
Winters (December–February) are mild and wet, with average highs of 14–15°C and lows of 5–7°C. Rain is frequent, especially from October to January, with November and December each receiving up to 130–150 mm of precipitation over 11–13 days. Snow is extremely rare. Spring (March–May) and autumn (September–November) are transitional, featuring mild to warm temperatures (17–22°C), blooming or colourful landscapes, and variable rainfall. May and October are particularly changeable, with both sunny spells and showers. Aveiro receives around 900–1,100 mm of rain annually and enjoys 2,600–2,800 hours of sunshine per year. Winds are generally light to moderate, averaging 10–20 km/h, and humidity is highest in winter, dropping to its lowest in July.
| Average climate data for Aveiro, Portugal | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 13 | 14 | 16 | 18 | 21 | 22 | 25 | 25 | 24 | 21 | 16 | 14 | 25 |
| Average minimum temperature (°C) | 8 | 8 | 9 | 10 | 12 | 14 | 16 | 16 | 15 | 14 | 10 | 9 | 8 |
| Average precipitation (mm) | 77 | 56 | 63 | 71 | 36 | 22 | 6 | 7 | 23 | 80 | 95 | 84 | 620 |
| Average rainfall days (days) | 14 | 12 | 14 | 14 | 11 | 8 | 5 | 3 | 6 | 12 | 15 | 12 | 126 |
| Average relative humidity (%) | 81 | 78 | 77 | 75 | 74 | 73 | 72 | 72 | 70 | 71 | 79 | 79 | 75 |
| Average wind speed (km/h) | 12 | 13 | 13 | 11 | 12 | 12 | 11 | 11 | 10 | 11 | 13 | 12 | 12 |
| Average daily daylight hours (h) | 9 | 10 | 12 | 13 | 14 | 15 | 14 | 13 | 12 | 11 | 9 | 9 | 12 |
| Average daily sunshine hours (h) | 5 | 6 | 7 | 8 | 10 | 10 | 11 | 11 | 9 | 6 | 5 | 5 | 8 |
| Average cloud coverage (%) | 43 | 38 | 37 | 37 | 28 | 26 | 19 | 18 | 20 | 31 | 42 | 40 | 32 |
| Average UV index | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 4 | 3 | 3 | 4 |
The best time to visit Aveiro is from May to September, when temperatures are warm (20–27°C), rainfall is minimal, and sunshine is abundant. These months offer ideal conditions for beaches, boat tours, and exploring the city’s canals, with pleasant evenings and lively outdoor cafés. Spring and early autumn are especially pleasant, with fewer crowds than peak summer.
The least favourable time to visit is from November to February, when rain is most frequent, days are shortest, and temperatures are coolest (highs of 14–15°C, lows of 5–7°C). While winters are mild, frequent rain can limit outdoor activities, though the city’s museums and cafés offer cosy refuge from the damp weather.
Aveiro has warm, sunny summers (highs 25–27°C) and mild, rainy winters (highs 14–15°C, lows 5–7°C). Rain falls mainly from October to March, while summer is sunny and almost rain-free. Sea breezes keep the climate comfortable.
Snow is extremely rare in Aveiro due to its mild, coastal climate. Most winter precipitation falls as rain, and frost is uncommon, making winters gentle compared to inland Portugal.
July and August are the sunniest months, with up to 10–11 hours of sunshine daily and long daylight hours. Even in spring and autumn, Aveiro enjoys several hours of sun per day.
Aveiro receives about 900–1,100 mm of rain annually, with the wettest months from October to January. July and August are the driest, often with less than 20 mm of rain each month.
Pack light, breathable clothes and sun protection for summer, layers and a rain jacket for spring and autumn, and a warm coat and waterproof shoes for winter. Even in summer, evenings can be cool by the coast.
Aveiro is known for its breezy conditions, especially in summer, with prevailing northwest winds from the Atlantic. Winds are generally light to moderate, averaging 10–20 km/h, and help keep summer temperatures comfortable.
Yes, Aveiro is close to several beaches, including Costa Nova and Praia da Barra. The sea is warmest from June to September, making these months ideal for swimming and sunbathing.
The warmest month, with the highest average maximum temperature, is August (25.3 °C). The month with the lowest average maximum temperature is January (13.3 °C). Overall, the average maximum temperature over the whole year is 19.2 °C.
The month with the highest average minimum temperature is August (16 °C). The coldest month, with the lowest average minimum temperature, is February (7.7 °C). Overall, the average minimum temperature over the whole year is 11.8 °C.
The wettest month, with the highest amount of precipitation, is November (95.2 mm). The driest month, with the least amount of precipitation, is July (6 mm). Over the whole year there are 619.6 mm of rainfall on average.
The month with the most days of rain is November (14.8 days). The month with the fewest days of rain is August (3.4 days). Over the whole year there are 125.9 days of rain on average.
The month with the highest average relative humidity is January (80.7 %). The month with the lowest average relative humidity is September (69.9 %). The overall average relative humidity over the whole year is 75 %.
The windiest month, with the highest average wind speed, is February (13.1 km/h). The calmest month, with the lowest average wind speed, is September (9.8 km/h). The overall average wind speed over the whole year is 11.7 km/h.
The month with the cloudiest skies, so the highest cloud coverage, is January (43 %). The month with the clearest skies, so the lowest cloud coverage, is August (18.3 %). Over the whole year there is an average cloud coverage of 31.7 %.
The month with the longest days, so the most daylight, is June (Average daylight: 15 h). The month with the shortest days, so the least daylight, is December (Average daylight: 9 h). Over the whole year there are 11.8 h of daylight per day on average.
The month with the most sunshine per day is August (Average sunshine: 11.1 h). The month with the least sunshine per day is January (Average sunshine: 5 h). Over the whole year there are 7.8 h of sunlight per day on average.
The months with the highest average UV index are May, June, July, August and September (UV index: 5). The months with the lowest average UV index are January, February, November and December (UV index: 3). Over the whole year the average UV index is 4.1.
