Leiria weather in August

In August, Leiria sees average daytime highs of 26°C and overnight lows near 15°C, with 10 mm of rain across 2.1 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 26°C through the month. The sky is clear or mostly clear about 73% of the time in August, and the air most often feels comfortable.

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 Leiria's 2nd-clearest and 6th-windiest month. For the whole year in context, see Leiria's year-round climate.

Daytime high
26°
1st warmest
Overnight low
15°
12th coldest
Rainfall
10 mm
2.1 wet days
Daylight
13 h 36 min
5:52 AM – 7:27 PM
Cloud cover
26%
2nd clearest
Wind
14 km/h
6th windiest
Solar energy
6.66 kWh/m²
Travel score
8.5
out of 10

Leiria is city seat of Leiria municipality.

Air quality
Moderate
PM2.5 11.8 µg/m³ · 2010

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 26°C through the month.

A typical August day in Leiria reaches about 26°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 31°C. Set against its neighbours, August runs on par with July and about 2°C warmer than September.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12616
22616
32616
42716
52716
62716
72716
82716
92716
102716
112616
122616
132616
142616
152615
162615
172615
182615
192615
202615
212615
222615
232615
242615
252615
262615
272615
282615
292615
302615
312615

Leiria 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° / 8810.59.53.9
Feb15° / 668.610.44.6
Mar17° / 709.611.75.8
Apr19° / 10°7310.5136.0
May21° / 12°638.714.26.9
Jun24° / 14°183.814.88.3
Jul26° / 15°61.814.58.7
Aug26° / 15°102.113.68.5
Sep25° / 14°415.612.38.0
Oct21° / 13°9610.410.96.5
Nov17° / 9811.69.85.2
Dec14° / 9210.49.24.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 73% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 14% 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 (%)
19010
29010
38812
48812
58812
68812
78812
88713
98614
108614
118614
128614
138614
148614
158614
168614
178614
188614
198515
208515
218515
228515
238515
248515
258614
268614
278614
288614
298614
308416
318416

Chance of precipitation in August

Any precipitation

Leiria gets around 10 mm of rain over 2.1 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 7% and peaks near 10% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
16
26
36
46
56
66
76
86
96
106
116
126
136
146
156
166
176
186
196
206
217
227
237
247
258
268
278
288
299
309
3110

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 49% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11051381
21150382
31150372
41249372
51349372
61348362
71348362
81448362
91447363
101347373
111347373
121347373
131348373
141248373
151248373
161249373
171149373
181150363
191150363
201150363
211150363
221151353
231251352
241252342
251351342
261451332
271451332
281550332
291651321
301750321
311749321

Wind in August

Winds average 14 km/h in August.

Across August, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light 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 6:06 AM, and sunset from 7:45 PM to 7:04 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
514.05:417:41
614.05:427:39
713.95:437:38
813.95:447:37
913.85:457:36
1013.85:467:35
1113.85:477:33
1213.75:487:32
1313.75:497:31
1413.75:507:29
1513.65:517:28
1613.65:527:27
1713.55:537:25
1813.55:547:24
1913.55:557:22
2013.45:567:21
2113.45:577:20
2213.35:587:18
2313.35:597:17
2413.36:007:15
2513.26:017:14
2613.26:027:12
2713.16:037:10
2813.16:047:09
2913.06:057:07
3013.06:057:06
3113.06:067:04

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.66 kWh/m².

For context, solar energy here swings from a low near 1.91 kWh/m² to a high of 7.48 kWh/m² in July across the year — August's 6.66 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.2Intense
27.2Intense
37.2Intense
47.1Intense
57.1Intense
67.0Intense
77.0Intense
87.0Intense
97.0Intense
106.9Intense
116.9Intense
126.8Intense
136.8Intense
146.8Intense
156.7Intense
166.7Intense
176.6Intense
186.6Intense
196.5Intense
206.5Intense
216.5Intense
226.4Intense
236.4Intense
246.3Intense
256.3Intense
266.3Intense
276.2Intense
286.2Intense
296.1Intense
306.1Intense
316.0Intense
Planning a trip in August

Hazard calendar for Leiria

In seasonPeak

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

Leiria'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 Leiria?

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

8.5
Sightseeing
2nd-best month of the year
8.2
Beach & pool
1st-best month of the year

August is one of the better times to visit Leiria for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Leiria in August

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

In August, Leiria sees daytime highs around 26°C and nights near 15°C. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

Sea temperature near Leiria 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 30 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 Leiria 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 Leiria 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

Air quality in Leiria in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Leiria is worst in August — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Leiria's WHO annual average of 11.8 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateModerateGoodAug 1816 µg/m³Nov 238 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar14Moderate
Apr12Moderate
May10Good
Jun13Moderate
Jul11Good
Aug16Moderate
Sep13Moderate
Oct16Moderate
Nov8Good
Dec8Good
Location & terrain

Where is Leiria?

Leiria sits at 39.7°N, 8.8°W, 33 m above sea level, in Portugal. The nearest listed city is Marinha Grande, 11 km away.

Topography around Leiria

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Leiria.

Within 3 km, the terrain around Leiria has only modest variations in elevation — a maximum elevation change of 138 m around an average of 73 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 520 m; within 80 km, large variations in elevation — a maximum elevation change of 1,199 m.

The land around Leiria is covered by trees (37%), artificial surfaces (34%) and grassland (23%) within 3 km, trees (60%) and grassland (26%) within 16 km, and trees (47%), water (24%) and grassland (21%) within 80 km.

3 km
138 m
16 km
520 m
80 km
1,199 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Marinha Grande 11 km · Pombal 25 km · Alcobaça 26 km · Monsanto 32 km · Torres Novas 37 km · Tomar 38 km · Entroncamento 42 km · Figueira da Foz 46 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 Leiria (39.7436°, -8.8071°, elevation 33 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).