Caldas da Rainha weather in August

In August, Caldas da Rainha sees average daytime highs of 23°C and overnight lows near 18°C, with 7 mm of rain across 1.8 wet days and about 13.5 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 70% 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 12 h 54 min by month's end. Set against the rest of the year, August is Caldas da Rainha's 2nd-clearest and 4th-windiest month. For the whole year in context, see Caldas da Rainha's year-round climate.

Daytime high
23°
1st warmest
Overnight low
18°
12th coldest
Rainfall
7 mm
1.8 wet days
Daylight
13 h 36 min
5:54 AM – 7:27 PM
Cloud cover
28%
2nd clearest
Wind
19 km/h
4th windiest
Solar energy
6.62 kWh/m²
Travel score
8.7
out of 10

Caldas da Rainha is human settlement in 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 23°C through the month.

A typical August day in Caldas da Rainha reaches about 23°C in the afternoon and slips back to 18°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 26°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)
12318
22318
32318
42318
52318
62318
72318
82318
92318
102318
112318
122318
132318
142318
152318
162318
172318
182318
192318
202318
212318
222318
232318
242318
252318
262218
272218
282218
292218
302218
312218

Caldas da Rainha 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° / 10°7710.39.54.0
Feb14° / 11°558.210.54.4
Mar16° / 12°538.511.75.2
Apr17° / 13°549.3135.6
May19° / 14°457.214.16.7
Jun21° / 16°143.614.77.7
Jul22° / 17°61.814.58.6
Aug23° / 18°71.813.58.7
Sep22° / 17°314.812.37.8
Oct20° / 16°8210116.4
Nov17° / 13°8811.39.85.2
Dec15° / 11°799.99.34.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 70% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 15%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18614
28614
38614
48614
58515
68515
78515
88515
98416
108416
118416
128416
138515
148515
158515
168515
178515
188515
198515
208614
218515
228515
238515
248515
258515
268515
278515
288515
298515
308515
318515

Chance of precipitation in August

Any precipitation

Caldas da Rainha gets around 7 mm of rain over 1.8 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
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
206
216
226
236
246
257
267
277
287
297
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 63% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1229618
2229618
3229618
4229618
5229618
6229618
7229618
8229618
9229609
10229609
11229609
12229609
13128629
14128629
15127639
16127639
17127639
18126649
19126649
20126649
21126649
22126649
23126658
24126658
25226648
26226657
27226657
28326647
29326656
30326656
31426646

Wind in August

Winds average 19 km/h in August.

Across August, daily wind ranges from about 18 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
120breezy
220breezy
320breezy
420breezy
520breezy
620breezy
720light breeze
820light breeze
920light breeze
1020light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 06 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over August. Sunrise moves from 5:40 AM to 6:08 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)
114.15:407:45
214.15:417:44
314.05:427:43
414.05:437:42
514.05:437:41
613.95:447:40
713.95:457:39
813.95:467:38
913.85:477:36
1013.85:487:35
1113.75:497:34
1213.75:507:33
1313.75:517:31
1413.65:527:30
1513.65:537:29
1613.65:547:27
1713.55:557:26
1813.55:567:25
1913.45:577:23
2013.45:587:22
2113.45:597:20
2213.36:007:19
2313.36:017:17
2413.26:017:16
2513.26:027:14
2613.26:037:13
2713.16:047:11
2813.16:057:10
2913.06:067:08
3013.06:077:07
3112.96:087:05

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 1.94 kWh/m² to a high of 7.39 kWh/m² in July across the year — August's 6.62 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.1Intense
27.1Intense
37.1Intense
47.0Intense
57.0Intense
67.0Intense
77.0Intense
86.9Intense
96.9Intense
106.8Intense
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
286.2Intense
296.1Intense
306.1Intense
316.0Intense
Planning a trip in August

Is August a good time to visit Caldas da Rainha?

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

8.7
Sightseeing
1st-best month of the year
6.4
Beach & pool
1st-best month of the year

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

What to pack for Caldas da Rainha in August

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

In August, Caldas da Rainha sees daytime highs around 23°C and nights near 18°C. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

Sea temperature near Caldas da Rainha 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
Apr15Bracing
May16Cool
Jun18Cool
Jul18Cool
Aug19Cool
Sep19Cool
Oct18Cool
Nov17Cool
Dec15Cool

UV index in Caldas da Rainha 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 Caldas da Rainha 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 highVery 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 Caldas da Rainha?

Caldas da Rainha sits at 39.4°N, 9.1°W, 60 m above sea level, in Portugal. The nearest listed city is Peniche, 22 km away.

Topography around Caldas da Rainha

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

Within 3 km, the terrain around Caldas da Rainha has only modest variations in elevation — a maximum elevation change of 141 m around an average of 61 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 329 m; within 80 km, large variations in elevation — a maximum elevation change of 673 m.

The land around Caldas da Rainha is covered by grassland (39%), trees (33%) and artificial surfaces (23%) within 3 km, trees (43%) and grassland (30%) within 16 km, and water (32%), trees (31%) and grassland (26%) within 80 km.

3 km
141 m
16 km
329 m
80 km
673 m
treesshrubsgrasslandcroplandartificial surfaceswater
August weather nearby: Peniche 22 km · Alcobaça 22 km · Torres Vedras 36 km · Monsanto 37 km · Marinha Grande 42 km · Santarém 43 km · Azambuja 44 km · Leiria 47 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 Caldas da Rainha (39.4033°, -9.1384°, elevation 60 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).