Marinha Grande weather in August

In August, Marinha Grande sees average daytime highs of 22°C and overnight lows near 17°C, with 9 mm of rain across 1.9 wet days and about 13.6 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 71% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 06 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Marinha Grande's 2nd-clearest and 10th-windiest month. For the whole year in context, see Marinha Grande's year-round climate.

Daytime high
22°
1st warmest
Overnight low
17°
12th coldest
Rainfall
9 mm
1.9 wet days
Daylight
13 h 36 min
5:52 AM – 7:27 PM
Cloud cover
28%
2nd clearest
Wind
17 km/h
10th windiest
Solar energy
6.62 kWh/m²
Travel score
8.6
out of 10

Marinha Grande is capital city of the Marinha Grande municipality, Portugal.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical August day in Marinha Grande reaches about 22°C in the afternoon and slips back to 17°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 25°C. Set against its neighbours, August runs on par with July and about 1°C warmer than September.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12217
22217
32217
42217
52217
62217
72217
82217
92217
102217
112217
122217
132217
142217
152217
162217
172217
182217
192217
202217
212217
222217
232217
242217
252217
262217
272217
282217
292217
302217
312217

Marinha Grande weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 9911.39.53.8
Feb14° / 10°729.110.44.2
Mar16° / 11°709.411.75.0
Apr16° / 12°7410135.3
May18° / 14°598.114.26.4
Jun20° / 16°163.614.87.7
Jul22° / 17°61.614.58.5
Aug22° / 17°91.913.68.6
Sep21° / 16°395.312.37.6
Oct19° / 15°10310.510.96.2
Nov16° / 12°11012.39.84.9
Dec14° / 10°101119.24.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 71% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 14%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18911
28911
38812
48812
58812
68713
78713
88713
98713
108713
118713
128713
138713
148713
158713
168614
178614
188614
198614
208614
218614
228515
238515
248515
258515
268515
278515
288515
298515
308515
318515

Chance of precipitation in August

Any precipitation

Marinha Grande gets around 9 mm of rain over 1.9 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 6% and peaks near 8% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
15
25
36
46
56
66
76
86
96
106
116
126
136
146
155
165
175
185
195
205
216
226
236
246
256
267
277
287
298
308
318

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the humid band about 59% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1335593
2335593
3335584
4435574
5435574
6435574
7435574
8435574
9434584
10434575
11434575
12333595
13333595
14332605
15332605
16332605
17331615
18331624
19331624
20331624
21331624
22431614
23431614
24531604
25531604
26532594
27632584
28632593
29633583
30733573
31733573

Wind in August

Winds average 17 km/h in August.

Across August, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 06 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over August. Sunrise moves from 5:38 AM to 6:07 AM, and sunset from 7:45 PM to 7:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:387:45
214.15:397:44
314.15:407:43
414.05:417:42
514.05:427:41
614.05:437:40
713.95:447:39
813.95:457:38
913.85:467:36
1013.85:477:35
1113.85:487:34
1213.75:497:33
1313.75:507:31
1413.75:517:30
1513.65:517:29
1613.65:527:27
1713.55:537:26
1813.55:547:24
1913.55:557:23
2013.45:567:22
2113.45:577:20
2213.35:587:19
2313.35:597:17
2413.36:007:16
2513.26:017:14
2613.26:027:12
2713.16:037:11
2813.16:047:09
2913.06:057:08
3013.06:067:06
3113.06:077:05

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.62 kWh/m².

For context, solar energy here swings from a low near 1.92 kWh/m² to a high of 7.42 kWh/m² in July across the year — August's 6.62 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.2Intense
27.1Intense
37.1Intense
47.1Intense
57.0Intense
67.0Intense
77.0Intense
86.9Intense
96.9Intense
106.9Intense
116.8Intense
126.8Intense
136.7Intense
146.7Intense
156.7Intense
166.6Intense
176.6Intense
186.5Intense
196.5Intense
206.5Intense
216.4Intense
226.4Intense
236.3Intense
246.3Intense
256.3Intense
266.2Intense
276.2Intense
286.1Intense
296.1Intense
306.0Intense
316.0Intense
Planning a trip in August

Hazard calendar for Marinha Grande

In seasonPeak

None of Marinha Grande's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Marinha Grande's rainy season runs October–May, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Marinha Grande?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

8.6
Sightseeing
1st-best month of the year
5.9
Beach & pool
1st-best month of the year

August is one of the better times to visit Marinha Grande for general sightseeing.

What to pack for Marinha Grande in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Marinha Grande sees daytime highs around 22°C and nights near 17°C. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

Sea temperature near Marinha Grande in August

The nearest coast averages about 19°C in August — 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.

12°14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May16Cool
Jun18Cool
Jul18Cool
Aug19Cool
Sep19Cool
Oct18Cool
Nov17Cool
Dec15Cool

UV index in Marinha Grande in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 14UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar6High
Apr7Very high
May7High
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct5Moderate
Nov2Moderate
Dec2Low
Location & terrain

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.

3 km
81 m
16 km
307 m
80 km
1,199 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Leiria 11 km · Alcobaça 22 km · Pombal 32 km · Monsanto 37 km · Caldas da Rainha 42 km · Torres Novas 45 km · Figueira da Foz 45 km · Tomar 48 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
Catholic 68%not applicable 13%no religion 12%no response 2%

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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).