Carcavelos in Summer
In summer (June, July and August), Carcavelos sees average daytime highs around 23°C and overnight lows near 17°C, with 16 mm of rain over about 4 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 76% of the time across summer, and the air most often feels comfortable.
Summer is Carcavelos's best season of the year to visit on our travel score. For the whole year in context, see Carcavelos's year-round climate.
- Avg daytime high
- 23°C
- warmest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 16 mm
- 4 wet days
- Avg wind
- 19 km/h
- Travel score
- 9.0
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Carcavelos 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 Carcavelos reaches about 23°C and drops to 17°C overnight. The warmest of the three months is August, the coolest June.
Carcavelos 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 | 14° / 10° | 68 | 8.9 | 9.6 | 4.2 |
| Feb | 15° / 10° | 51 | 7.5 | 10.5 | 4.6 |
| Mar | 16° / 11° | 53 | 8.1 | 11.7 | 5.5 |
| Apr | 17° / 12° | 51 | 8.4 | 13 | 6.0 |
| May | 19° / 14° | 42 | 5.9 | 14.1 | 7.1 |
| Jun | 22° / 16° | 10 | 2.1 | 14.7 | 8.4 |
| Jul | 24° / 18° | 2 | 0.6 | 14.4 | 9.3 |
| Aug | 24° / 18° | 4 | 1 | 13.5 | 9.2 |
| Sep | 23° / 17° | 29 | 4.1 | 12.3 | 8.3 |
| Oct | 20° / 16° | 77 | 8.9 | 11 | 6.7 |
| Nov | 17° / 13° | 82 | 10.2 | 9.9 | 5.5 |
| Dec | 15° / 11° | 79 | 9.4 | 9.3 | 4.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 76% of the time across summer.
Chance of precipitation in Summer
Carcavelos gets around 16 mm of rain over 4 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 19 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 30 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 7.3 kWh/m².
Is summer a good time to visit Carcavelos?
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 Carcavelos for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Carcavelos in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Carcavelos sees daytime highs around 23°C and nights near 17°C. Pack sun protection. Worth having: light clothes and a windbreaker.
Sea temperature near Carcavelos in Summer
The nearest coast averages about 18°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 19°C and coldest in February near 15°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) | 15 | 15 | 15 | 15 | 16 | 18 | 18 | 19 | 19 | 18 | 17 | 16 |
| Comfort | Cool | Bracing | Bracing | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Cool |
| Feb | 15 | Bracing |
| Mar | 15 | Bracing |
| Apr | 15 | Cool |
| May | 16 | Cool |
| Jun | 18 | Cool |
| Jul | 18 | Cool |
| Aug | 19 | Cool |
| Sep | 19 | Cool |
| Oct | 18 | Cool |
| Nov | 17 | Cool |
| Dec | 16 | Cool |
UV index in Carcavelos 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 Carcavelos peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 | 6 | 8 | 7 | 9 | 9 | 9 | 6 | 5 | 3 | 2 |
| Level | Low | Moderate | High | Very high | Very high | Very high | Very high | Very high | High | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 6 | High |
| Apr | 8 | Very high |
| May | 7 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Where is Carcavelos?
Carcavelos sits at 38.7°N, 9.3°W, 30 m above sea level, in Portugal. The nearest listed city is Oeiras, 1.0 km away.
Topography around Carcavelos
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Carcavelos.
Within 3 km, the terrain around Carcavelos has only modest variations in elevation — a maximum elevation change of 123 m around an average of 32 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 514 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.
The land around Carcavelos is covered by artificial surfaces (41%) and water (33%) within 3 km, water (45%) and artificial surfaces (22%) within 16 km, and water (46%) and grassland (26%) 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 Carcavelos (38.691°, -9.3222°, elevation 30 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.