Marinha Grande in Summer
In summer (June, July and August), Marinha Grande sees average daytime highs around 21°C and overnight lows near 16°C, with 31 mm of rain over about 7 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 20°C in early June to 22°C by late August. The sky is clear or mostly clear about 67% of the time across summer, and the air most often feels humid.
Summer is Marinha Grande's best season of the year to visit on our travel score. For the whole year in context, see Marinha Grande's year-round climate.
- Avg daytime high
- 21°C
- warmest season of the year
- Avg overnight low
- 16°C
- Rainfall
- 31 mm
- 7 wet days
- Avg wind
- 18 km/h
- Travel score
- 8.3
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Marinha Grande in Summer
Over the season highs climb from about 20°C in early June to 22°C by late August.
A typical summer day in Marinha Grande reaches about 21°C and drops to 16°C overnight. The warmest of the three months is August, the coolest June.
Marinha Grande 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° / 9° | 99 | 11.3 | 9.5 | 3.8 |
| Feb | 14° / 10° | 72 | 9.1 | 10.4 | 4.2 |
| Mar | 16° / 11° | 70 | 9.4 | 11.7 | 5.0 |
| Apr | 16° / 12° | 74 | 10 | 13 | 5.3 |
| May | 18° / 14° | 59 | 8.1 | 14.2 | 6.4 |
| Jun | 20° / 16° | 16 | 3.6 | 14.8 | 7.7 |
| Jul | 22° / 17° | 6 | 1.6 | 14.5 | 8.5 |
| Aug | 22° / 17° | 9 | 1.9 | 13.6 | 8.6 |
| Sep | 21° / 16° | 39 | 5.3 | 12.3 | 7.6 |
| Oct | 19° / 15° | 103 | 10.5 | 10.9 | 6.2 |
| Nov | 16° / 12° | 110 | 12.3 | 9.8 | 4.9 |
| Dec | 14° / 10° | 101 | 11 | 9.2 | 4.2 |
Cloud cover in Summer
The sky is clear or mostly clear about 67% of the time across summer.
Chance of precipitation in Summer
Marinha Grande gets around 31 mm of rain over 7 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 18 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 36 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 7.1 kWh/m².
Hazard calendar for Marinha Grande
None of Marinha Grande's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Marinha Grande's rainy season runs October–May, when most of the year's rain falls.
Is summer a good time to visit Marinha Grande?
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 Marinha Grande for general sightseeing.
What to pack for Marinha Grande in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Marinha Grande sees daytime highs around 21°C and nights near 16°C. Pack sun protection. Worth having: light clothes. About 7 days see rain.
Sea temperature near Marinha Grande 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 at the nearest coast (about 21 km away) is warmest in August at about 19°C and coldest in February near 14°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 | 14 | 14 | 15 | 16 | 18 | 18 | 19 | 19 | 18 | 17 | 15 |
| Comfort | Bracing | Bracing | Bracing | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Bracing |
| Feb | 14 | Bracing |
| Mar | 14 | 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 | 15 | Cool |
UV index in Marinha Grande 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 Marinha Grande peaks around July 14 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 | 6 | 7 | 7 | 9 | 9 | 8 | 6 | 5 | 2 | 2 |
| Level | Low | Moderate | High | Very high | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 6 | High |
| Apr | 7 | Very high |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 5 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Where is Marinha Grande?
Marinha Grande sits at 39.7°N, 8.9°W, 91 m above sea level, in Portugal. The nearest listed city is Leiria, 11 km away.
Topography around Marinha Grande
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Marinha Grande.
Within 3 km, the terrain around Marinha Grande has only modest variations in elevation — a maximum elevation change of 81 m around an average of 96 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 307 m; within 80 km, large variations in elevation — a maximum elevation change of 1,199 m.
The land around Marinha Grande is covered by trees (43%), artificial surfaces (28%) and grassland (26%) within 3 km, trees (41%) and grassland (28%) within 16 km, and trees (44%), water (28%) and grassland (20%) 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 Marinha Grande (39.7477°, -8.9323°, 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.