Brest weather in August

In August, Brest sees average daytime highs of 19°C and overnight lows near 14°C, with 53 mm of rain across 10 wet days and about 14.1 hours of daylight. It is the 1st-warmest and 9th-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 24% 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 Brest's 3rd-clearest and 12th-windiest month. For the whole year in context, see Brest's year-round climate.

Daytime high: 19°; 1st warmest
Overnight low: 14°; 12th coldest
Rainfall: 53 mm; 10 wet days
Daylight: 14 h 12 min; 6:18 AM – 8:27 PM
Cloud cover: 62%; 3rd clearest
Wind: 16 km/h; 12th windiest
Solar energy: 5.2 kWh/m²
Travel score: 6.1; out of 10

Brest is port city in the Finistère department, Brittany, France.

Air quality: Good; PM2.5 7.5 µg/m³ · 2019
Density: 2,927/km²; people per km²

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

← July Brest year-round climate September →Best places to visit in August

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

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 Brest reaches about 19°C in the afternoon and slips back to 14°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 22°C. Set against its neighbours, August runs on par with July and about 1°C warmer than September.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19
Avg low (°C)	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	14	14	14	14	14	14	14	14	14	14	14	14	14	14

	Avg high (°C)	Avg low (°C)
1	19	15
2	19	15
3	19	15
4	19	15
5	19	15
6	19	15
7	19	15
8	19	15
9	19	15
10	19	15
11	19	15
12	19	15
13	19	15
14	19	15
15	19	15
16	19	15
17	19	15
18	19	14
19	19	14
20	19	14
21	19	14
22	19	14
23	19	14
24	19	14
25	19	14
26	19	14
27	19	14
28	19	14
29	19	14
30	19	14
31	19	14

Brest weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	10° / 7°	99	15.3	8.6	1.8
Feb	10° / 6°	79	13.3	9.9	1.8
Mar	11° / 7°	64	12.6	11.6	2.5
Apr	13° / 8°	66	11.9	13.4	3.2
May	15° / 10°	59	10.6	15	4.4
Jun	17° / 13°	47	9.7	15.8	5.5
Jul	19° / 14°	45	10.1	15.5	6.1
Aug	19° / 14°	53	10	14.1	6.1
Sep	18° / 13°	52	9.6	12.4	5.8
Oct	15° / 11°	92	14.1	10.6	4.1
Nov	12° / 9°	96	14.9	9	2.9
Dec	11° / 7°	106	15.3	8.2	2.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% 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 56%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	44	44	44	44	45	45	44	45	45	45	45	45	45	45	44	43	43	42	42	43	42	42	42	43	43	43	44	45	45	46	46
Cloudier (%)	56	56	56	56	55	55	56	55	55	55	55	55	55	55	56	57	57	58	58	57	58	58	58	57	57	57	56	55	55	54	54

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	44	56
5	45	55
6	45	55
7	44	56
8	45	55
9	45	55
10	45	55
11	45	55
12	45	55
13	45	55
14	45	55
15	44	56
16	43	57
17	43	57
18	42	58
19	42	58
20	43	57
21	42	58
22	42	58
23	42	58
24	43	57
25	43	57
26	43	57
27	44	56
28	45	55
29	45	55
30	46	54
31	46	54

Chance of precipitation in August

Any precipitation

Brest gets around 53 mm of rain over 10 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 32% and peaks near 35% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	30	30	30	30	30	31	31	31	31	32	32	32	33	33	34	34	34	35	35	35	35	34	34	33	32	31	30	29	28	28	27

	Rain chance (%)
1	30
2	30
3	30
4	30
5	30
6	31
7	31
8	31
9	31
10	32
11	32
12	32
13	33
14	33
15	34
16	34
17	34
18	35
19	35
20	35
21	35
22	34
23	34
24	33
25	32
26	31
27	30
28	29
29	28
30	28
31	27

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 55% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	21	21	22	22	23	23	23	23	24	24	24	25	25	25	25	25	25	25	26	26	27	28	29	31	32	33	35	36	37	38	40
Comfortable (%)	59	58	57	57	55	55	55	55	54	54	55	54	54	55	55	55	56	56	56	56	56	56	56	55	55	54	53	52	52	52	50
Humid (%)	20	21	21	21	22	22	22	22	22	22	21	21	21	20	20	20	19	19	18	18	17	16	15	14	13	13	12	12	11	10	10

	Dry (%)	Comfortable (%)	Humid (%)
1	21	59	20
2	21	58	21
3	22	57	21
4	22	57	21
5	23	55	22
6	23	55	22
7	23	55	22
8	23	55	22
9	24	54	22
10	24	54	22
11	24	55	21
12	25	54	21
13	25	54	21
14	25	55	20
15	25	55	20
16	25	55	20
17	25	56	19
18	25	56	19
19	26	56	18
20	26	56	18
21	27	56	17
22	28	56	16
23	29	56	15
24	31	55	14
25	32	55	13
26	33	54	13
27	35	53	12
28	36	52	12
29	37	52	11
30	38	52	10
31	40	50	10

Wind in August

Winds average 16 km/h in August, the calmest month.

Across August, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	17	17	17	17	17	17	17	17	17
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	16	light breeze
2	16	light breeze
3	16	light breeze
4	16	light breeze
5	16	light breeze
6	16	light breeze
7	16	light breeze
8	16	light breeze
9	16	light breeze
10	16	light breeze
11	16	light breeze
12	16	light breeze
13	16	light breeze
14	16	light breeze
15	16	light breeze
16	16	light breeze
17	16	light breeze
18	16	light breeze
19	16	light breeze
20	16	light breeze
21	16	light breeze
22	16	light breeze
23	17	light breeze
24	17	light breeze
25	17	light breeze
26	17	light breeze
27	17	light breeze
28	17	light breeze
29	17	light breeze
30	17	light breeze
31	17	light breeze

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 5:57 AM to 6:39 AM, and sunset from 8:51 PM to 7:57 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	14.9	14.9	14.8	14.8	14.7	14.7	14.6	14.6	14.5	14.5	14.4	14.4	14.3	14.3	14.2	14.2	14.1	14.0	14.0	13.9	13.9	13.8	13.8	13.7	13.6	13.6	13.5	13.5	13.4	13.4	13.3
Sunrise (AM)	5:57	5:58	6:00	6:01	6:02	6:04	6:05	6:06	6:08	6:09	6:11	6:12	6:13	6:15	6:16	6:18	6:19	6:20	6:22	6:23	6:25	6:26	6:27	6:29	6:30	6:32	6:33	6:35	6:36	6:37	6:39
Sunset (PM)	8:51	8:50	8:48	8:47	8:45	8:44	8:42	8:40	8:39	8:37	8:35	8:34	8:32	8:30	8:28	8:27	8:25	8:23	8:21	8:19	8:17	8:15	8:13	8:11	8:09	8:07	8:05	8:03	8:01	7:59	7:57

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.9	5:57	8:51
2	14.9	5:58	8:50
3	14.8	6:00	8:48
4	14.8	6:01	8:47
5	14.7	6:02	8:45
6	14.7	6:04	8:44
7	14.6	6:05	8:42
8	14.6	6:06	8:40
9	14.5	6:08	8:39
10	14.5	6:09	8:37
11	14.4	6:11	8:35
12	14.4	6:12	8:34
13	14.3	6:13	8:32
14	14.3	6:15	8:30
15	14.2	6:16	8:28
16	14.2	6:18	8:27
17	14.1	6:19	8:25
18	14.0	6:20	8:23
19	14.0	6:22	8:21
20	13.9	6:23	8:19
21	13.9	6:25	8:17
22	13.8	6:26	8:15
23	13.8	6:27	8:13
24	13.7	6:29	8:11
25	13.6	6:30	8:09
26	13.6	6:32	8:07
27	13.5	6:33	8:05
28	13.5	6:35	8:03
29	13.4	6:36	8:01
30	13.4	6:37	7:59
31	13.3	6:39	7:57

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.2 kWh/m².

For context, solar energy here swings from a low near 0.89 kWh/m² to a high of 6.38 kWh/m² in June across the year — August's 5.2 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	5.7	5.7	5.7	5.7	5.6	5.6	5.6	5.5	5.5	5.5	5.4	5.4	5.3	5.3	5.3	5.2	5.2	5.1	5.1	5.0	5.0	5.0	4.9	4.9	4.8	4.8	4.8	4.8	4.7	4.7	4.7
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.7	Bright
2	5.7	Bright
3	5.7	Bright
4	5.7	Bright
5	5.6	Bright
6	5.6	Bright
7	5.6	Bright
8	5.5	Bright
9	5.5	Bright
10	5.5	Bright
11	5.4	Bright
12	5.4	Bright
13	5.3	Bright
14	5.3	Bright
15	5.3	Bright
16	5.2	Bright
17	5.2	Bright
18	5.1	Bright
19	5.1	Bright
20	5.0	Bright
21	5.0	Bright
22	5.0	Bright
23	4.9	Bright
24	4.9	Bright
25	4.8	Bright
26	4.8	Bright
27	4.8	Bright
28	4.8	Bright
29	4.7	Bright
30	4.7	Bright
31	4.7	Bright

Planning a trip in August

Is August a good time to visit Brest?

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

6.1

Sightseeing

1st-best month of the year

2.7

Beach & pool

1st-best month of the year

August is a reasonable time to visit Brest for sightseeing.

What to pack for Brest in August

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

In August, Brest sees daytime highs around 19°C and nights near 14°C. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Brest in August

The nearest coast averages about 16°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 16°C and coldest in February near 10°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)	11	10	10	11	13	14	15	16	15	15	14	12
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	11	Bracing
Feb	10	Bracing
Mar	10	Bracing
Apr	11	Bracing
May	13	Bracing
Jun	14	Bracing
Jul	15	Cool
Aug	16	Cool
Sep	15	Cool
Oct	15	Bracing
Nov	14	Bracing
Dec	12	Bracing

UV index in Brest 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 Brest peaks around August 14 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	3	5	6	7	6	7	5	3	1	1
Level	Low	Low	Moderate	Moderate	High	High	High	High	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	3	Moderate
Apr	5	Moderate
May	6	High
Jun	7	High
Jul	6	High
Aug	7	High
Sep	5	Moderate
Oct	3	Moderate
Nov	1	Low
Dec	1	Low

Location & terrain

Where is Brest?

Brest sits at 48.4°N, 4.5°W, 49 m above sea level, in France. The nearest listed city is Landerneau, 19 km away.

Topography around Brest

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

Within 3 km, the terrain around Brest has only modest variations in elevation — a maximum elevation change of 109 m around an average of 39 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 182 m; within 80 km, significant variations in elevation — a maximum elevation change of 384 m.

The land around Brest is covered by artificial surfaces (46%), water (28%) and trees (22%) within 3 km, trees (27%), water (25%) and cropland (21%) within 16 km, and water (56%) within 80 km.

3 km

109 m

artificial surfaces 46%

16 km

182 m

trees 27%

80 km

384 m

water 56%

treesgrasslandcroplandartificial surfaceswater

← July Brest year-round climate September →Best places to visit in August

August weather nearby: Landerneau 19 km · Douarnenez 35 km · Quimper 52 km · Morlaix 53 km · Concarneau 71 km · Lannion 85 km · Ploemeur 107 km · Lorient 109 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

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 Brest (48.3903°, -4.4863°, elevation 49 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).

	Avg high (°C)	Avg low (°C)
1	19	15
2	19	15
3	19	15
4	19	15
5	19	15
6	19	15
7	19	15
8	19	15
9	19	15
10	19	15
11	19	15
12	19	15
13	19	15
14	19	15
15	19	15
16	19	15
17	19	15
18	19	14
19	19	14
20	19	14
21	19	14
22	19	14
23	19	14
24	19	14
25	19	14
26	19	14
27	19	14
28	19	14
29	19	14
30	19	14
31	19	14

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	44	56
5	45	55
6	45	55
7	44	56
8	45	55
9	45	55
10	45	55
11	45	55
12	45	55
13	45	55
14	45	55
15	44	56
16	43	57
17	43	57
18	42	58
19	42	58
20	43	57
21	42	58
22	42	58
23	42	58
24	43	57
25	43	57
26	43	57
27	44	56
28	45	55
29	45	55
30	46	54
31	46	54

	Rain chance (%)
1	30
2	30
3	30
4	30
5	30
6	31
7	31
8	31
9	31
10	32
11	32
12	32
13	33
14	33
15	34
16	34
17	34
18	35
19	35
20	35
21	35
22	34
23	34
24	33
25	32
26	31
27	30
28	29
29	28
30	28
31	27

	Dry (%)	Comfortable (%)	Humid (%)
1	21	59	20
2	21	58	21
3	22	57	21
4	22	57	21
5	23	55	22
6	23	55	22
7	23	55	22
8	23	55	22
9	24	54	22
10	24	54	22
11	24	55	21
12	25	54	21
13	25	54	21
14	25	55	20
15	25	55	20
16	25	55	20
17	25	56	19
18	25	56	19
19	26	56	18
20	26	56	18
21	27	56	17
22	28	56	16
23	29	56	15
24	31	55	14
25	32	55	13
26	33	54	13
27	35	53	12
28	36	52	12
29	37	52	11
30	38	52	10
31	40	50	10

	Avg high (°C)	Avg low (°C)
1	19	15
2	19	15
3	19	15
4	19	15
5	19	15
6	19	15
7	19	15
8	19	15
9	19	15
10	19	15
11	19	15
12	19	15
13	19	15
14	19	15
15	19	15
16	19	15
17	19	15
18	19	14
19	19	14
20	19	14
21	19	14
22	19	14
23	19	14
24	19	14
25	19	14
26	19	14
27	19	14
28	19	14
29	19	14
30	19	14
31	19	14

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	44	56
5	45	55
6	45	55
7	44	56
8	45	55
9	45	55
10	45	55
11	45	55
12	45	55
13	45	55
14	45	55
15	44	56
16	43	57
17	43	57
18	42	58
19	42	58
20	43	57
21	42	58
22	42	58
23	42	58
24	43	57
25	43	57
26	43	57
27	44	56
28	45	55
29	45	55
30	46	54
31	46	54

	Rain chance (%)
1	30
2	30
3	30
4	30
5	30
6	31
7	31
8	31
9	31
10	32
11	32
12	32
13	33
14	33
15	34
16	34
17	34
18	35
19	35
20	35
21	35
22	34
23	34
24	33
25	32
26	31
27	30
28	29
29	28
30	28
31	27

	Dry (%)	Comfortable (%)	Humid (%)
1	21	59	20
2	21	58	21
3	22	57	21
4	22	57	21
5	23	55	22
6	23	55	22
7	23	55	22
8	23	55	22
9	24	54	22
10	24	54	22
11	24	55	21
12	25	54	21
13	25	54	21
14	25	55	20
15	25	55	20
16	25	55	20
17	25	56	19
18	25	56	19
19	26	56	18
20	26	56	18
21	27	56	17
22	28	56	16
23	29	56	15
24	31	55	14
25	32	55	13
26	33	54	13
27	35	53	12
28	36	52	12
29	37	52	11
30	38	52	10
31	40	50	10

	Avg high (°C)	Avg low (°C)
1	19	15
2	19	15
3	19	15
4	19	15
5	19	15
6	19	15
7	19	15
8	19	15
9	19	15
10	19	15
11	19	15
12	19	15
13	19	15
14	19	15
15	19	15
16	19	15
17	19	15
18	19	14
19	19	14
20	19	14
21	19	14
22	19	14
23	19	14
24	19	14
25	19	14
26	19	14
27	19	14
28	19	14
29	19	14
30	19	14
31	19	14

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	44	56
5	45	55
6	45	55
7	44	56
8	45	55
9	45	55
10	45	55
11	45	55
12	45	55
13	45	55
14	45	55
15	44	56
16	43	57
17	43	57
18	42	58
19	42	58
20	43	57
21	42	58
22	42	58
23	42	58
24	43	57
25	43	57
26	43	57
27	44	56
28	45	55
29	45	55
30	46	54
31	46	54

	Rain chance (%)
1	30
2	30
3	30
4	30
5	30
6	31
7	31
8	31
9	31
10	32
11	32
12	32
13	33
14	33
15	34
16	34
17	34
18	35
19	35
20	35
21	35
22	34
23	34
24	33
25	32
26	31
27	30
28	29
29	28
30	28
31	27

	Dry (%)	Comfortable (%)	Humid (%)
1	21	59	20
2	21	58	21
3	22	57	21
4	22	57	21
5	23	55	22
6	23	55	22
7	23	55	22
8	23	55	22
9	24	54	22
10	24	54	22
11	24	55	21
12	25	54	21
13	25	54	21
14	25	55	20
15	25	55	20
16	25	55	20
17	25	56	19
18	25	56	19
19	26	56	18
20	26	56	18
21	27	56	17
22	28	56	16
23	29	56	15
24	31	55	14
25	32	55	13
26	33	54	13
27	35	53	12
28	36	52	12
29	37	52	11
30	38	52	10
31	40	50	10