Gujan-Mestras weather in May

In May, Gujan-Mestras sees average daytime highs of 20°C and overnight lows near 13°C, with 70 mm of rain across 11.6 wet days and about 14.6 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 22°C by the end. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 hours at the start of May to 15 h 06 min by month's end. Set against the rest of the year, May is Gujan-Mestras's 8th-clearest and 7th-windiest month. For the whole year in context, see Gujan-Mestras's year-round climate.

Daytime high: 20°; 5th warmest
Overnight low: 13°; 8th coldest
Rainfall: 70 mm; 11.6 wet days
Daylight: 14 h 36 min; 5:42 AM – 8:19 PM
Cloud cover: 61%; 8th clearest
Wind: 11 km/h; 7th windiest
Solar energy: 5.8 kWh/m²
Travel score: 6.0; out of 10

← April Gujan-Mestras year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 18°C in the first days to 22°C by the end.

A typical May day in Gujan-Mestras reaches about 20°C in the afternoon and slips back to 13°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 25°C. Set against its neighbours, May runs about 3°C warmer than April and about 3°C cooler than June.

	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)	18	18	18	18	19	19	19	19	19	19	19	19	20	20	20	20	20	20	20	21	21	21	21	21	21	21	21	22	22	22	22
Avg low (°C)	11	11	11	11	11	12	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14

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

Gujan-Mestras weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	10° / 5°	72	11.5	9	2.3
Feb	11° / 5°	52	9.4	10.1	2.8
Mar	14° / 7°	54	10.7	11.6	4.2
Apr	17° / 9°	66	12	13.2	5.0
May	20° / 13°	70	11.6	14.6	6.0
Jun	23° / 16°	63	9.3	15.3	7.0
Jul	25° / 18°	46	7.8	15	7.3
Aug	26° / 18°	53	8	13.9	7.3
Sep	23° / 15°	63	9	12.3	7.0
Oct	19° / 12°	73	10.6	10.7	5.9
Nov	14° / 8°	88	12.5	9.4	3.7
Dec	11° / 6°	77	11.8	8.7	2.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to open up as the month goes on.

	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 (%)	38	38	37	37	37	37	38	38	38	39	38	39	39	40	42	42	43	43	45	45	46	46	46	48	49	49	48	48	48	48	47
Cloudier (%)	62	62	63	63	63	63	62	62	62	61	62	61	61	60	58	58	57	57	55	55	54	54	54	52	51	51	52	52	52	52	53

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	37	63
4	37	63
5	37	63
6	37	63
7	38	62
8	38	62
9	38	62
10	39	61
11	38	62
12	39	61
13	39	61
14	40	60
15	42	58
16	42	58
17	43	57
18	43	57
19	45	55
20	45	55
21	46	54
22	46	54
23	46	54
24	48	52
25	49	51
26	49	51
27	48	52
28	48	52
29	48	52
30	48	52
31	47	53

Chance of precipitation in May

Any precipitation

Gujan-Mestras gets around 70 mm of rain over 11.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 42% 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 (%)	42	42	41	41	40	39	39	38	38	38	38	38	38	38	38	39	39	39	38	38	38	38	38	37	37	37	36	36	36	36	37

	Rain chance (%)
1	42
2	42
3	41
4	41
5	40
6	39
7	39
8	38
9	38
10	38
11	38
12	38
13	38
14	38
15	38
16	39
17	39
18	39
19	38
20	38
21	38
22	38
23	38
24	37
25	37
26	37
27	36
28	36
29	36
30	36
31	37

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 73% 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 (%)	88	87	87	85	84	83	82	82	81	81	81	79	79	79	78	77	76	75	73	72	71	68	66	64	61	58	57	54	52	51	49
Comfortable (%)	12	13	13	14	15	16	17	17	18	18	18	19	19	19	20	20	21	22	23	24	25	27	28	30	32	34	35	37	38	39	40
Humid (%)	0	0	0	1	1	1	1	1	1	1	1	2	2	2	2	3	3	3	4	4	4	5	6	6	7	8	8	9	10	10	11

	Dry (%)	Comfortable (%)	Humid (%)
1	88	12	0
2	87	13	0
3	87	13	0
4	85	14	1
5	84	15	1
6	83	16	1
7	82	17	1
8	82	17	1
9	81	18	1
10	81	18	1
11	81	18	1
12	79	19	2
13	79	19	2
14	79	19	2
15	78	20	2
16	77	20	3
17	76	21	3
18	75	22	3
19	73	23	4
20	72	24	4
21	71	25	4
22	68	27	5
23	66	28	6
24	64	30	6
25	61	32	7
26	58	34	8
27	57	35	8
28	54	37	9
29	52	38	10
30	51	39	10
31	49	40	11

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 11 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)	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

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

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 hours at the start of May to 15 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over May. Sunrise moves from 6:02 AM to 5:29 AM, and sunset from 8:01 PM to 8:34 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)	14.0	14.0	14.1	14.1	14.2	14.2	14.2	14.3	14.3	14.4	14.4	14.5	14.5	14.5	14.6	14.6	14.6	14.7	14.7	14.8	14.8	14.8	14.9	14.9	14.9	14.9	15.0	15.0	15.0	15.1	15.1
Sunrise (AM)	6:02	6:01	5:59	5:58	5:56	5:55	5:54	5:52	5:51	5:50	5:48	5:47	5:46	5:45	5:43	5:42	5:41	5:40	5:39	5:38	5:37	5:36	5:35	5:34	5:33	5:33	5:32	5:31	5:30	5:30	5:29
Sunset (PM)	8:01	8:02	8:03	8:04	8:06	8:07	8:08	8:09	8:10	8:12	8:13	8:14	8:15	8:16	8:18	8:19	8:20	8:21	8:22	8:23	8:24	8:25	8:26	8:27	8:28	8:29	8:30	8:31	8:32	8:33	8:34

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.0	6:02	8:01
2	14.0	6:01	8:02
3	14.1	5:59	8:03
4	14.1	5:58	8:04
5	14.2	5:56	8:06
6	14.2	5:55	8:07
7	14.2	5:54	8:08
8	14.3	5:52	8:09
9	14.3	5:51	8:10
10	14.4	5:50	8:12
11	14.4	5:48	8:13
12	14.5	5:47	8:14
13	14.5	5:46	8:15
14	14.5	5:45	8:16
15	14.6	5:43	8:18
16	14.6	5:42	8:19
17	14.6	5:41	8:20
18	14.7	5:40	8:21
19	14.7	5:39	8:22
20	14.8	5:38	8:23
21	14.8	5:37	8:24
22	14.8	5:36	8:25
23	14.9	5:35	8:26
24	14.9	5:34	8:27
25	14.9	5:33	8:28
26	14.9	5:33	8:29
27	15.0	5:32	8:30
28	15.0	5:31	8:31
29	15.0	5:30	8:32
30	15.1	5:30	8:33
31	15.1	5:29	8:34

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.8 kWh/m².

For context, solar energy here swings from a low near 1.25 kWh/m² to a high of 6.27 kWh/m² in June across the year — May's 5.8 kWh/m² sits near the top of that range.

	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)	5.3	5.3	5.3	5.4	5.4	5.4	5.5	5.5	5.5	5.6	5.6	5.7	5.7	5.7	5.8	5.8	5.8	5.9	5.9	5.9	6.0	6.0	6.0	6.0	6.0	6.0	6.0	6.1	6.1	6.1	6.1
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	5.3	Bright
2	5.3	Bright
3	5.3	Bright
4	5.4	Bright
5	5.4	Bright
6	5.4	Bright
7	5.5	Bright
8	5.5	Bright
9	5.5	Bright
10	5.6	Bright
11	5.6	Bright
12	5.7	Bright
13	5.7	Bright
14	5.7	Bright
15	5.8	Bright
16	5.8	Bright
17	5.8	Bright
18	5.9	Bright
19	5.9	Bright
20	5.9	Bright
21	6.0	Bright
22	6.0	Bright
23	6.0	Bright
24	6.0	Intense
25	6.0	Intense
26	6.0	Intense
27	6.0	Intense
28	6.1	Intense
29	6.1	Intense
30	6.1	Intense
31	6.1	Intense

Planning a trip in May

Is May a good time to visit Gujan-Mestras?

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

6.0

Sightseeing

5th-best month of the year

3.2

Beach & pool

5th-best month of the year

May is a reasonable time to visit Gujan-Mestras for sightseeing.

What to pack for Gujan-Mestras in May

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

In May, Gujan-Mestras sees daytime highs around 20°C and nights near 13°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

Sea temperature near Gujan-Mestras in May

The nearest coast averages about 16°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 24 km away) is warmest in August at about 22°C and coldest in February near 12°C.

It's comfortable for a long swim from Jul 7 to Sep 18 — about 2.4 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	12	12	12	13	16	18	21	22	20	18	16	14
Comfort	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Refreshing	Refreshing	Refreshing	Cool	Cool	Bracing

	Sea temperature (°C)	Comfort
Jan	12	Bracing
Feb	12	Bracing
Mar	12	Bracing
Apr	13	Bracing
May	16	Cool
Jun	18	Cool
Jul	21	Refreshing
Aug	22	Refreshing
Sep	20	Refreshing
Oct	18	Cool
Nov	16	Cool
Dec	14	Bracing

UV index in Gujan-Mestras in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Gujan-Mestras peaks around July 18 at about 8 (very 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 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	2	4	6	6	7	8	7	5	3	2	1
Level	Low	Low	Moderate	High	High	Very high	Very high	Very high	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	2	Low
Mar	4	Moderate
Apr	6	High
May	6	High
Jun	7	Very high
Jul	8	Very high
Aug	7	Very high
Sep	5	Moderate
Oct	3	Moderate
Nov	2	Low
Dec	1	Low

Location & terrain

Where is Gujan-Mestras?

Gujan-Mestras sits at 44.6°N, 1.1°W, 5 m above sea level, in France. The nearest listed city is La Teste-de-Buch, 6.0 km away.

Topography around Gujan-Mestras

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

Within 3 km, the terrain around Gujan-Mestras has only modest variations in elevation — a maximum elevation change of 26 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 96 m; within 80 km, only modest variations in elevation — a maximum elevation change of 149 m.

The land around Gujan-Mestras is covered by water (28%), trees (27%) and artificial surfaces (27%) within 3 km, trees (49%) and water (23%) within 16 km, and trees (44%), water (26%) and grassland (20%) within 80 km.

3 km

26 m

water 28%

16 km

96 m

trees 49%

80 km

149 m

trees 44%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← April Gujan-Mestras year-round climate June →Best places to visit in May

May weather nearby: La Teste-de-Buch 6.0 km · Cestas 33 km · Gradignan 39 km · Pessac 39 km · Saint-Médard-en-Jalles 40 km · Mérignac 41 km · Talence 42 km · Villenave-d'Ornon 43 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 Gujan-Mestras (44.636°, -1.0681°, elevation 5 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	18	11
2	18	11
3	18	11
4	18	11
5	19	11
6	19	12
7	19	12
8	19	12
9	19	12
10	19	12
11	19	12
12	19	12
13	20	12
14	20	12
15	20	13
16	20	13
17	20	13
18	20	13
19	20	13
20	21	13
21	21	13
22	21	13
23	21	13
24	21	14
25	21	14
26	21	14
27	21	14
28	22	14
29	22	14
30	22	14
31	22	14

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	37	63
4	37	63
5	37	63
6	37	63
7	38	62
8	38	62
9	38	62
10	39	61
11	38	62
12	39	61
13	39	61
14	40	60
15	42	58
16	42	58
17	43	57
18	43	57
19	45	55
20	45	55
21	46	54
22	46	54
23	46	54
24	48	52
25	49	51
26	49	51
27	48	52
28	48	52
29	48	52
30	48	52
31	47	53

	Rain chance (%)
1	42
2	42
3	41
4	41
5	40
6	39
7	39
8	38
9	38
10	38
11	38
12	38
13	38
14	38
15	38
16	39
17	39
18	39
19	38
20	38
21	38
22	38
23	38
24	37
25	37
26	37
27	36
28	36
29	36
30	36
31	37

	Dry (%)	Comfortable (%)	Humid (%)
1	88	12	0
2	87	13	0
3	87	13	0
4	85	14	1
5	84	15	1
6	83	16	1
7	82	17	1
8	82	17	1
9	81	18	1
10	81	18	1
11	81	18	1
12	79	19	2
13	79	19	2
14	79	19	2
15	78	20	2
16	77	20	3
17	76	21	3
18	75	22	3
19	73	23	4
20	72	24	4
21	71	25	4
22	68	27	5
23	66	28	6
24	64	30	6
25	61	32	7
26	58	34	8
27	57	35	8
28	54	37	9
29	52	38	10
30	51	39	10
31	49	40	11

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

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	37	63
4	37	63
5	37	63
6	37	63
7	38	62
8	38	62
9	38	62
10	39	61
11	38	62
12	39	61
13	39	61
14	40	60
15	42	58
16	42	58
17	43	57
18	43	57
19	45	55
20	45	55
21	46	54
22	46	54
23	46	54
24	48	52
25	49	51
26	49	51
27	48	52
28	48	52
29	48	52
30	48	52
31	47	53

	Rain chance (%)
1	42
2	42
3	41
4	41
5	40
6	39
7	39
8	38
9	38
10	38
11	38
12	38
13	38
14	38
15	38
16	39
17	39
18	39
19	38
20	38
21	38
22	38
23	38
24	37
25	37
26	37
27	36
28	36
29	36
30	36
31	37

	Dry (%)	Comfortable (%)	Humid (%)
1	88	12	0
2	87	13	0
3	87	13	0
4	85	14	1
5	84	15	1
6	83	16	1
7	82	17	1
8	82	17	1
9	81	18	1
10	81	18	1
11	81	18	1
12	79	19	2
13	79	19	2
14	79	19	2
15	78	20	2
16	77	20	3
17	76	21	3
18	75	22	3
19	73	23	4
20	72	24	4
21	71	25	4
22	68	27	5
23	66	28	6
24	64	30	6
25	61	32	7
26	58	34	8
27	57	35	8
28	54	37	9
29	52	38	10
30	51	39	10
31	49	40	11

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

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	37	63
4	37	63
5	37	63
6	37	63
7	38	62
8	38	62
9	38	62
10	39	61
11	38	62
12	39	61
13	39	61
14	40	60
15	42	58
16	42	58
17	43	57
18	43	57
19	45	55
20	45	55
21	46	54
22	46	54
23	46	54
24	48	52
25	49	51
26	49	51
27	48	52
28	48	52
29	48	52
30	48	52
31	47	53

	Rain chance (%)
1	42
2	42
3	41
4	41
5	40
6	39
7	39
8	38
9	38
10	38
11	38
12	38
13	38
14	38
15	38
16	39
17	39
18	39
19	38
20	38
21	38
22	38
23	38
24	37
25	37
26	37
27	36
28	36
29	36
30	36
31	37

	Dry (%)	Comfortable (%)	Humid (%)
1	88	12	0
2	87	13	0
3	87	13	0
4	85	14	1
5	84	15	1
6	83	16	1
7	82	17	1
8	82	17	1
9	81	18	1
10	81	18	1
11	81	18	1
12	79	19	2
13	79	19	2
14	79	19	2
15	78	20	2
16	77	20	3
17	76	21	3
18	75	22	3
19	73	23	4
20	72	24	4
21	71	25	4
22	68	27	5
23	66	28	6
24	64	30	6
25	61	32	7
26	58	34	8
27	57	35	8
28	54	37	9
29	52	38	10
30	51	39	10
31	49	40	11