Royan weather in September

In September, Royan sees average daytime highs of 23°C and overnight lows near 13°C, with 52 mm of rain across 7.9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 21°C by the end. The sky is clear or mostly clear about 33% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Royan's 3rd-clearest and 11th-windiest month. For the whole year in context, see Royan's year-round climate.

Daytime high
23°
4th warmest
Overnight low
13°
9th coldest
Rainfall
52 mm
7.9 wet days
Daylight
12 h 18 min
6:49 AM – 7:08 PM
Cloud cover
53%
3rd clearest
Wind
12 km/h
11th windiest
Solar energy
4.16 kWh/m²
Travel score
7.2
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 25°C in the first days to 21°C by the end.

A typical September day in Royan reaches about 23°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 29°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12515
22515
32515
42515
52514
62414
72414
82414
92414
102414
112414
122414
132314
142314
152313
162313
172313
182313
192313
202213
212213
222213
232213
242213
252213
262213
272113
282112
292112
302112

Royan weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan10° / 7111.28.92.1
Feb11° / 529.410.12.7
Mar14° / 5310.511.64.1
Apr17° / 6010.913.35.2
May20° / 11°6311.314.76.1
Jun24° / 14°488.515.47.0
Jul26° / 16°38715.17.3
Aug26° / 16°416.913.97.3
Sep23° / 13°527.912.37.2
Oct19° / 11°7411.410.75.7
Nov14° / 8112.59.33.6
Dec11° / 7912.38.62.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25743
35743
45743
55644
65644
75644
85545
95446
105446
115347
125347
135248
145248
155248
165149
175149
185149
195050
205050
215050
225050
234951
244951
254951
264852
274654
284555
294456
304357

Chance of precipitation in September

Any precipitation

Royan gets around 52 mm of rain over 7.9 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 27% and peaks near 33% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
121
221
322
422
522
622
723
823
924
1025
1125
1226
1326
1427
1527
1628
1728
1828
1929
2029
2129
2229
2330
2430
2531
2631
2732
2833
2933
3033

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14233223
24333213
34433203
44534192
54634182
64634172
74735172
84735161
94835161
104836151
114836151
124936151
134935151
145035141
155135140
165234140
175334130
185433130
195433130
205533120
215533120
225632120
235732110
245732110
255732110
265732110
275831110
285831110
295831110
305831110

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over September. Sunrise moves from 6:30 AM to 7:07 AM, and sunset from 7:38 PM to 6:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.16:307:38
213.16:317:36
313.06:327:34
413.06:347:32
512.96:357:30
612.96:367:28
712.86:387:26
812.86:397:24
912.76:407:22
1012.66:417:20
1112.66:437:18
1212.56:447:16
1312.56:457:14
1412.46:467:12
1512.46:487:10
1612.36:497:08
1712.36:507:06
1812.26:527:04
1912.26:537:02
2012.16:547:00
2112.06:556:58
2212.06:576:56
2311.96:586:54
2411.96:596:52
2511.87:016:50
2611.87:026:48
2711.77:036:46
2811.77:046:44
2911.67:066:42
3011.57:076:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.16 kWh/m².

For context, solar energy here swings from a low near 1.14 kWh/m² to a high of 6.24 kWh/m² in June across the year — September's 4.16 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.7Bright
54.7Bright
64.7Bright
74.6Bright
84.5Bright
94.5Bright
104.4Bright
114.4Bright
124.3Bright
134.3Bright
144.2Bright
154.2Bright
164.1Bright
174.0Bright
184.0Moderate
193.9Moderate
203.9Moderate
213.8Moderate
223.8Moderate
233.7Moderate
243.7Moderate
253.6Moderate
263.5Moderate
273.5Moderate
283.4Moderate
293.4Moderate
303.3Moderate
Planning a trip in September

Is September a good time to visit Royan?

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

7.2
Sightseeing
3rd-best month of the year
5.5
Beach & pool
4th-best month of the year

September is one of the better times to visit Royan for general sightseeing.

What to pack for Royan in September

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

In September, Royan sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes. About 8 days see rain.

light clothes

Sea temperature near Royan in September

The nearest coast averages about 19°C in September — 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 21°C and coldest in February near 10°C.

It's comfortable for a long swim from Jul 19 to Aug 31 — about 1.4 months when the water holds above 20°C.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar11Bracing
Apr13Bracing
May15Cool
Jun18Cool
Jul20Refreshing
Aug21Refreshing
Sep19Cool
Oct17Cool
Nov15Bracing
Dec12Bracing

UV index in Royan in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Royan peaks around July 20 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 20UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr6High
May6High
Jun7High
Jul8Very high
Aug8Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Royan?

Royan sits at 45.6°N, 1.0°W, 7 m above sea level, in France. The nearest listed city is Saintes, 34 km away.

Topography around Royan

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

Within 3 km, the terrain around Royan has only modest variations in elevation — a maximum elevation change of 37 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 68 m; within 80 km, only modest variations in elevation — a maximum elevation change of 203 m.

The land around Royan is covered by artificial surfaces (35%) and water (30%) within 3 km, water (39%) and cropland (21%) within 16 km, and water (31%), cropland (29%) and trees (21%) within 80 km.

3 km
37 m
16 km
68 m
80 km
203 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Saintes 34 km · Rochefort 35 km · Cognac 55 km · La Rochelle 60 km · Saint-Médard-en-Jalles 85 km · Blanquefort 86 km · Eysines 88 km · Niort 89 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 Royan (45.6281°, -1.0315°, elevation 7 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).