Gujan-Mestras weather in July

In July, Gujan-Mestras sees average daytime highs of 25°C and overnight lows near 18°C, with 46 mm of rain across 7.8 wet days and about 15 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 26°C by the end. The sky is clear or mostly clear about 41% of the time in July, and the air most often feels humid.

Daylight stretches from about 15 h 18 min at the start of July to 14 h 36 min by month's end. Set against the rest of the year, July is Gujan-Mestras's 2nd-clearest and 10th-windiest month. For the whole year in context, see Gujan-Mestras's year-round climate.

Daytime high
25°
2nd warmest
Overnight low
18°
12th coldest
Rainfall
46 mm
7.8 wet days
Daylight
15 h 06 min
5:38 AM – 8:42 PM
Cloud cover
49%
2nd clearest
Wind
10 km/h
10th windiest
Solar energy
6.17 kWh/m²
Travel score
7.3
out of 10

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 26°C by the end.

A typical July day in Gujan-Mestras reaches about 25°C in the afternoon and slips back to 18°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 31°C. Set against its neighbours, July runs about 2°C warmer than June and on par with August.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12417
22417
32417
42517
52517
62517
72517
82517
92517
102517
112517
122517
132517
142518
152518
162618
172618
182618
192618
202618
212618
222618
232618
242618
252618
262618
272618
282618
292618
302618
312618

Gujan-Mestras weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan10° / 7211.592.3
Feb11° / 529.410.12.8
Mar14° / 5410.711.64.2
Apr17° / 661213.25.0
May20° / 13°7011.614.66.0
Jun23° / 16°639.315.37.0
Jul25° / 18°467.8157.3
Aug26° / 18°53813.97.3
Sep23° / 15°63912.37.0
Oct19° / 12°7310.610.75.9
Nov14° / 8812.59.43.7
Dec11° / 7711.88.72.6

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 21% of July, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25545
35545
45545
55446
65446
75545
85644
95644
105743
115842
125941
136040
146139
156238
166238
176436
186436
196535
206535
216535
226535
236535
246634
256634
266634
276634
286634
296634
306634
316634

Chance of precipitation in July

Any precipitation

Gujan-Mestras gets around 46 mm of rain over 7.8 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
228
328
428
528
628
728
827
926
1026
1125
1224
1324
1423
1523
1622
1722
1822
1922
2022
2122
2223
2323
2423
2523
2623
2723
2823
2924
3024
3124

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the humid band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11740367
21640377
31640377
41640387
51539387
61539397
71539397
81538407
91538407
101538417
111437417
121437417
131437418
141436428
151336429
161335439
1712344410
1812334510
1911324611
2010314711
219314812
229304912
238304912
248304913
257304913
267304914
277304814
287304815
297304815
306314716
317314616

Wind in July

Winds average 10 km/h in July.

Across July, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 18 min at the start of July to 14 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 5:28 AM to 5:53 AM, and sunset from 8:48 PM to 8:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.35:288:48
215.35:288:48
315.35:298:47
415.35:298:47
515.35:308:47
615.35:308:47
715.35:318:46
815.25:328:46
915.25:328:46
1015.25:338:45
1115.25:348:45
1215.25:358:44
1315.15:368:44
1415.15:368:43
1515.15:378:42
1615.15:388:42
1715.05:398:41
1815.05:408:40
1915.05:418:39
2014.95:428:39
2114.95:438:38
2214.95:448:37
2314.95:458:36
2414.85:468:35
2514.85:478:34
2614.85:488:33
2714.75:498:32
2814.75:508:31
2914.65:518:30
3014.65:528:29
3114.65:538:27

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.17 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 — July's 6.17 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.1Intense
266.1Intense
276.1Intense
286.0Intense
296.0Intense
306.0Bright
316.0Bright
Planning a trip in July

Is July a good time to visit Gujan-Mestras?

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

7.3
Sightseeing
1st-best month of the year
6.8
Beach & pool
2nd-best month of the year

July is one of the better times to visit Gujan-Mestras for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Gujan-Mestras in July

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

In July, Gujan-Mestras sees daytime highs around 25°C and nights near 18°C. Pack sun protection. Worth having: light clothes. About 8 days see rain.

sun protectionlight clothes

Sea temperature near Gujan-Mestras in July

The nearest coast averages about 21°C in July — 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.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb12Bracing
Mar12Bracing
Apr13Bracing
May16Cool
Jun18Cool
Jul21Refreshing
Aug22Refreshing
Sep20Refreshing
Oct18Cool
Nov16Cool
Dec14Bracing

UV index in Gujan-Mestras in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowJul 18UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul8Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
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
16 km
96 m
80 km
149 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
July 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
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 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).