Saint-Malo weather in August

In August, Saint-Malo sees average daytime highs of 19°C and overnight lows near 17°C, with 59 mm of rain across 10.2 wet days and about 14.2 hours of daylight. It is the 1st-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 19°C through the month. The sky is clear or mostly clear about 31% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 54 min at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Saint-Malo's 2nd-clearest and 12th-windiest month. For the whole year in context, see Saint-Malo's year-round climate.

Daytime high
19°
1st warmest
Overnight low
17°
12th coldest
Rainfall
59 mm
10.2 wet days
Daylight
14 h 12 min
6:07 AM – 8:17 PM
Cloud cover
57%
2nd clearest
Wind
20 km/h
12th windiest
Solar energy
5.12 kWh/m²
Travel score
6.1
out of 10
Air quality
Good
PM10 19.5 µg/m³ · 2019

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 19°C through the month.

A typical August day in Saint-Malo reaches about 19°C in the afternoon and slips back to 17°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 21°C. Set against its neighbours, August runs on par with July and about 1°C warmer than September.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11917
21917
31917
41917
51917
61917
71917
81917
91917
101917
111917
121917
131917
141917
151917
161917
171917
181917
191917
201917
211917
221917
231917
241917
251917
261917
271917
281916
291916
301916
311916

Saint-Malo weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan / 9114.88.51.6
Feb / 73139.81.5
Mar10° / 6612.211.62.1
Apr11° / 5810.413.42.9
May14° / 11°579.8154.0
Jun16° / 14°508.815.85.2
Jul18° / 16°489.315.56.2
Aug19° / 17°5910.214.26.1
Sep18° / 16°7610.712.45.7
Oct16° / 13°10715.310.54.2
Nov12° / 10°11716.392.8
Dec10° / 11916.18.11.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35149
45050
55149
65149
75149
85248
95248
105248
115248
125248
135248
145248
155248
165248
175248
185149
195050
205050
215050
225050
235050
245149
255149
265149
275149
285149
295248
305347
315347

Chance of precipitation in August

Any precipitation

Saint-Malo gets around 59 mm of rain over 10.2 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 33% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
231
331
431
532
632
733
833
933
1034
1134
1234
1334
1434
1534
1634
1734
1834
1934
2034
2134
2233
2333
2433
2532
2632
2731
2831
2931
3031
3131

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 (%)
11354321
21354321
31453321
41452331
51452331
61551331
71550332
81550332
91650332
101650322
111650322
121750322
131750312
141850302
151850302
161851292
171950292
181950292
192051281
202150281
212249271
222449271
232548261
242747251
252847241
263046241
273145231
283245221
293344221
303544210
313643210

Wind in August

Winds average 20 km/h in August, the calmest month.

Across August, daily wind ranges from about 19 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1920light breeze
2020breezy
2120breezy
2220breezy
2320breezy
2420breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy
3121breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 54 min at the start of August to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over August. Sunrise moves from 5:46 AM to 6:29 AM, and sunset from 8:42 PM to 7:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.95:468:42
214.95:488:41
314.85:498:39
414.85:508:38
514.75:528:36
614.75:538:34
714.65:548:33
814.65:568:31
914.55:578:30
1014.55:598:28
1114.46:008:26
1214.46:018:24
1314.36:038:23
1414.36:048:21
1514.26:068:19
1614.26:078:17
1714.16:088:15
1814.16:108:14
1914.06:118:12
2013.96:138:10
2113.96:148:08
2213.86:168:06
2313.86:178:04
2413.76:198:02
2513.76:208:00
2613.66:217:58
2713.56:237:56
2813.56:247:54
2913.46:267:52
3013.46:277:50
3113.36:297:48

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.12 kWh/m².

For context, solar energy here swings from a low near 0.88 kWh/m² to a high of 6.22 kWh/m² in June across the year — August's 5.12 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.4Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.0Bright
195.0Bright
205.0Bright
214.9Bright
224.9Bright
234.8Bright
244.8Bright
254.8Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.6Bright
314.6Bright
Planning a trip in August

Is August a good time to visit Saint-Malo?

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

6.1
Sightseeing
2nd-best month of the year
2.5
Beach & pool
1st-best month of the year

August is a reasonable time to visit Saint-Malo for sightseeing.

What to pack for Saint-Malo in August

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

In August, Saint-Malo sees daytime highs around 19°C and nights near 17°C. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Saint-Malo in August

The nearest coast averages about 18°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 18°C and coldest in February near 9°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan9Bracing
Feb9Bracing
Mar9Bracing
Apr10Bracing
May12Bracing
Jun15Bracing
Jul17Cool
Aug18Cool
Sep18Cool
Oct16Cool
Nov13Bracing
Dec11Bracing

UV index in Saint-Malo in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Saint-Malo peaks around June 17 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 11 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 17UV 7Jan 11UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun7High
Jul6High
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Saint-Malo?

Saint-Malo sits at 48.6°N, 2.0°W, 10 m above sea level, in France. The nearest listed city is Saint-Brieuc, 58 km away.

Topography around Saint-Malo

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

Within 3 km, the terrain around Saint-Malo has only modest variations in elevation — a maximum elevation change of 52 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 144 m; within 80 km, significant variations in elevation — a maximum elevation change of 375 m.

The land around Saint-Malo is covered by water (47%) and artificial surfaces (31%) within 3 km, water (54%) within 16 km, and water (35%) and cropland (27%) within 80 km.

3 km
52 m
16 km
144 m
80 km
375 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Saint-Brieuc 58 km · Saint Helier 61 km · Rennes 65 km · Cesson-Sévigné 66 km · Fougères 68 km · Vitré 83 km · Saint-Lô 85 km · Pontivy 96 km

France travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 77% of US
price level, 2025
GDP per capita
$48,986
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.3
per 100k, 2023
Road deaths
5.1
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 539
Religion
Roman Catholic 47%none 33%Muslim 4%Protestant 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 Saint-Malo (48.6474°, -2.0088°, elevation 10 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).