Porto in Summer
In summer (June, July and August), Porto sees average daytime highs around 24°C and overnight lows near 17°C, with 92 mm of rain over about 15 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 22°C in early June to 25°C by late August. The sky is clear or mostly clear about 61% of the time across summer, and the air most often feels humid.
Summer is Porto's best season of the year to visit on our travel score. For the whole year in context, see Porto's year-round climate.
- Avg daytime high
- 24°C
- warmest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 92 mm
- 15 wet days
- Avg wind
- 10 km/h
- Travel score
- 8.1
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Porto in Summer
Over the season highs climb from about 22°C in early June to 25°C by late August.
A typical summer day in Porto reaches about 24°C and drops to 17°C overnight. The warmest of the three months is August, the coolest June.
Porto weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 13° / 7° | 150 | 12.2 | 9.4 | 3.3 |
| Feb | 14° / 7° | 103 | 9.5 | 10.4 | 4.0 |
| Mar | 16° / 9° | 121 | 10.2 | 11.7 | 5.1 |
| Apr | 17° / 10° | 121 | 11.8 | 13.1 | 5.5 |
| May | 20° / 13° | 101 | 11.2 | 14.3 | 6.3 |
| Jun | 23° / 15° | 40 | 6.3 | 14.9 | 7.6 |
| Jul | 25° / 17° | 23 | 4 | 14.7 | 8.4 |
| Aug | 26° / 17° | 30 | 4.5 | 13.6 | 8.2 |
| Sep | 23° / 16° | 64 | 6.6 | 12.3 | 7.7 |
| Oct | 20° / 13° | 166 | 12.7 | 10.9 | 6.0 |
| Nov | 16° / 10° | 163 | 12.9 | 9.7 | 4.5 |
| Dec | 13° / 8° | 167 | 12.4 | 9.1 | 3.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 61% of the time across summer.
Chance of precipitation in Summer
Porto gets around 92 mm of rain over 15 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 10 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 42 min in early June to 13 hours by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 7.0 kWh/m².
Hazard calendar for Porto
None of Porto's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Porto's rainy season runs October–May, when most of the year's rain falls.
Is summer a good time to visit Porto?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Porto for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Porto in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Porto sees daytime highs around 24°C and nights near 17°C. Pack sun protection. Worth having: light clothes. About 15 days see rain.
Sea temperature near Porto in Summer
The nearest coast averages about 17°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 17°C and coldest in February near 13°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 14 | 13 | 14 | 14 | 16 | 17 | 17 | 17 | 17 | 17 | 16 | 14 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 14 | Bracing |
| Feb | 13 | Bracing |
| Mar | 14 | Bracing |
| Apr | 14 | Bracing |
| May | 16 | Cool |
| Jun | 17 | Cool |
| Jul | 17 | Cool |
| Aug | 17 | Cool |
| Sep | 17 | Cool |
| Oct | 17 | Cool |
| Nov | 16 | Cool |
| Dec | 14 | Bracing |
UV index in Porto in Summer
Clear-sky midday UV across summer averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Porto peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 6 | 7 | 9 | 9 | 8 | 5 | 4 | 2 | 2 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 5 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Where is Porto?
Porto sits at 41.1°N, 8.6°W, 91 m above sea level, in Portugal. The nearest listed city is Bomfim, 2.0 km away.
Topography around Porto
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Porto.
Within 3 km, the terrain around Porto has only modest variations in elevation — a maximum elevation change of 161 m around an average of 82 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 377 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,422 m.
The land around Porto is covered by artificial surfaces (70%) within 3 km, trees (31%), water (28%) and artificial surfaces (26%) within 16 km, and trees (42%), water (26%) and grassland (23%) within 80 km.
Portugal travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / E / F
- 230 V · 50 Hz
- Prices
- ≈ 60% of US
- price level, 2025
- GDP per capita
- $32,082
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 95%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2022
- Road deaths
- 8.2
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 612
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Porto (41.1485°, -8.611°, elevation 91 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.