Olhão in Summer
In summer (June, July and August), Olhão sees average daytime highs around 24°C and overnight lows near 20°C, with 8 mm of rain over about 1 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 21°C in early June to 24°C by late August. The sky is clear or mostly clear about 86% of the time across summer, and the air most often feels humid.
Summer is Olhão's best season of the year to visit on our travel score. For the whole year in context, see Olhão's year-round climate.
- Avg daytime high
- 24°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 8 mm
- 1 wet days
- Avg wind
- 16 km/h
- Travel score
- 9.3
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Olhão in Summer
Over the season highs climb from about 21°C in early June to 24°C by late August.
A typical summer day in Olhão reaches about 24°C and drops to 20°C overnight. The warmest of the three months is August, the coolest June.
Olhão 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 | 15° / 12° | 53 | 6.9 | 9.7 | 5.0 |
| Feb | 15° / 12° | 45 | 5.4 | 10.6 | 5.2 |
| Mar | 16° / 13° | 51 | 6.2 | 11.7 | 5.8 |
| Apr | 17° / 14° | 40 | 5.5 | 12.9 | 6.5 |
| May | 20° / 16° | 24 | 4.4 | 14 | 7.5 |
| Jun | 22° / 19° | 5 | 0.8 | 14.5 | 8.9 |
| Jul | 25° / 20° | 1 | 0.1 | 14.3 | 9.6 |
| Aug | 25° / 21° | 2 | 0.3 | 13.4 | 9.5 |
| Sep | 23° / 20° | 17 | 2.7 | 12.3 | 8.6 |
| Oct | 21° / 18° | 67 | 6.5 | 11 | 7.2 |
| Nov | 18° / 15° | 68 | 7.2 | 10 | 6.4 |
| Dec | 16° / 13° | 86 | 7.6 | 9.5 | 5.3 |
Cloud cover in Summer
The sky is clear or mostly clear about 86% of the time across summer.
Chance of precipitation in Summer
Olhão gets around 8 mm of rain over 1 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 16 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 18 min in early June to 12 h 54 min 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 7.6 kWh/m².
Is summer a good time to visit Olhão?
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 Olhão for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Olhão in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Olhão sees daytime highs around 24°C and nights near 20°C. Pack sun protection. Worth having: light clothes.
Sea temperature near Olhão in Summer
The nearest coast averages about 21°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 17 km away) is warmest in August at about 22°C and coldest in February near 16°C.
It's comfortable for a long swim from Jun 22 to Oct 25 — about 4.1 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 17 | 16 | 16 | 17 | 18 | 20 | 21 | 22 | 21 | 21 | 19 | 17 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 17 | Cool |
| Feb | 16 | Cool |
| Mar | 16 | Cool |
| Apr | 17 | Cool |
| May | 18 | Cool |
| Jun | 20 | Cool |
| Jul | 21 | Refreshing |
| Aug | 22 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 21 | Refreshing |
| Nov | 19 | Cool |
| Dec | 17 | Cool |
UV index in Olhão 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 Olhão peaks around July 14 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 7 | 8 | 7 | 9 | 10 | 9 | 7 | 5 | 3 | 2 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Extreme | Very high | High | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 7 | High |
| Apr | 8 | Very high |
| May | 7 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Extreme |
| Aug | 9 | Very high |
| Sep | 7 | High |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Where is Olhão?
Olhão sits at 37.0°N, 7.8°W, 11 m above sea level, in Portugal. The nearest listed city is Quelfes, 4.0 km away.
Topography around Olhão
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Olhão.
Within 3 km, the terrain around Olhão has only modest variations in elevation — a maximum elevation change of 66 m around an average of 11 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 408 m; within 80 km, large variations in elevation — a maximum elevation change of 894 m.
The land around Olhão is covered by water (36%) and grassland (28%) within 3 km, water (47%) and grassland (24%) within 16 km, and water (41%) and grassland (30%) 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 Olhão (37.0286°, -7.8411°, elevation 11 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.