France / Hauts-de-France
Fort-Mahon-Plage
Fort-Mahon-Plage is a coastal resort area in Hauts-de-France, France. Its longest mapped beach stretches about 1.8 km and has a sand surface. The sea averages 18.1 °C in August, its warmest month, and 7.7 °C in February; it never reaches 21 °C on average.
Average sea surface temperature by month. Current month outlined.
The sea peaks at 18.1 °C in August. Most swimmers find water below 20 °C cold; a wetsuit is common here.
OpenStreetMap shows no lifeguard station within 1 km. Seasonal lifeguard posts are often unmapped, so check on site.
Services in the resort
- 36Restaurants, cafés & bars
- 6Public toilets
- –Showers
- 1Drinking water
- 9Car parks
- –Lifeguard stations
- 14Hotels & guesthouses
- 3Campsites
- 4Grocery shops
- 2Bus stops (1.5 km)
- 1Pharmacies & clinics
- 2Cash machines
- 1Viewpoints
Food and drink mapped within 1 km: 28 restaurants, 1 café, 5 bars and 2 fast-food outlets. Accommodation: 14 hotels and guesthouses.
Counted within 1 km of the beach (bus stops 1.5 km) from OpenStreetMap features and Overture Maps places, release of 2026-10. Unmapped does not mean absent.
Month by month
October at Fort-Mahon-Plage
Beach-day index 2.6/10 · France median 4.9
| Measure | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea °C | 8.6 °C | 7.7 °C | 7.8 °C | 9.4 °C | 11.7 °C | 14.3 °C | 16.6 °C | 18.1 °C | 17.6 °C | 15.7 °C | 13.1 °C | 10.5 °C |
| High °C | 6° | 7° | 10° | 14° | 17° | 20° | 21° | 21° | 19° | 15° | 10° | 7° |
| Low °C | 1° | 1° | 2° | 5° | 8° | 11° | 13° | 13° | 11° | 8° | 5° | 2° |
| Rain mm | 77 | 64 | 57 | 44 | 60 | 57 | 66 | 74 | 58 | 82 | 91 | 92 |
| Cloud % | 79 | 76 | 71 | 63 | 66 | 64 | 62 | 64 | 65 | 73 | 79 | 79 |
| Wind m/s | 6.2 | 6.0 | 5.5 | 4.7 | 4.7 | 4.4 | 4.4 | 4.3 | 4.6 | 5.2 | 5.5 | 5.8 |
| Daylight h | 8.5 | 10.0 | 11.8 | 13.7 | 15.4 | 16.4 | 16.0 | 14.6 | 12.7 | 10.8 | 9.1 | 8.1 |
| Record high/low | 13°/-10° | 16°/-11° | 20°/-6° | 24°/-4° | 27°/2° | 30°/5° | 34°/7° | 33°/9° | 28°/4° | 26°/-3° | 18°/-4° | 13°/-7° |
| Beach index | 2.2 | 2.4 | 2.6 | 2.9 | 2.7 | 4.0 | 5.1 | 5.5 | 4.3 | 2.6 | 2.2 | 2.2 |
Long-term monthly averages: air from NASA POWER (2001–2020), sea from NOAA OISST (1991–2020); records are the extremes of 2001–2020. How the index works.
When to go
The beach-day index peaks in August; August scores 5.5/10 with highs of 21 °C, sea at 18.1 °C and 74 mm of rain.
In August that is 2.5 points below the median of the 625 beaches in France covered by this atlas.
At its warmest the water here is 4.0 °C cooler than the France median for August (22.1 °C).
Across the year the sea averages 12.6 °C, cooler than 82% of the coastal beaches in the atlas.
December is the wettest month (92 mm) and April the driest (44 mm); the yearly total is about 820 mm.
Daylight runs from 8.1 hours in December to 16.4 hours in June; in mid-August the sun rises at 06:41 and sets at 21:15 local time.
Orientation, sun and shore
The shore faces north-west (310°). Open water fills about 58% of the horizon close by, which makes it an exposed spot with water on most sides.
The sun sets over the sea in every month; in mid-June it goes down at 22:05 local time on a bearing of 310°.
Sunrise is over the sea in June–July.
The opposite shore is only about 500 m away to the north-west, which keeps the water sheltered from big waves.
The sea floor is still within the shallow coastal margin 1 km out; 3 km offshore the depth is about 2 m. Behind the beach the ground is about 10 m above sea level 500 m inland and 6 m at 1.5 km, a flat coastal plain.
Within 1 km, the land is 34% tree cover, 34% grassland and 29% built-up land (satellite land-cover map, 2021): a partly built-up setting. Water makes up 1% of that circle.
- Tree 34%
- Grass 34%
- Built 29%
- Bare 3%
Land cover: ESA WorldCover 2021 (10 m). Orientation from OpenStreetMap land polygons sampled in 36 directions; depths and heights from the GEBCO 2020 grid (about 450 m cells), indicative only.
Getting there
| Airport | Code | Distance | Direction |
|---|---|---|---|
| Beauvais-Tillé airport Beauvais | BVA | 106 km | south |
| Lille Airport Lesquin | LIL | 112 km | east |
| Ostend-Bruges International Airport Oostende | OST | 133 km | north-east |
Straight-line distances from the beach; road distance is usually 20–40% longer.
Local transport: 2 bus stops within 1.5 km and 9 mapped car parks within 1 km.
6 towns and villages of 1,000+ people lie within 10 km (about 37.3K residents); within 30 km there are 28 (about 101.4K).
Photos
From above
Around the beach
Campsites
- Le Robinson 780 m NE
- Camping Soleil 780 m E
- Grand Soleil 790 m E
Map and nearby beaches
Loading map…
Open in OpenStreetMap · Directions in Google Maps
| Beach | Distance | Warmest sea | Length | Surface |
|---|---|---|---|---|
| Fort-Mahon-Plage | – | 18.1 °C | 1.8 km | Sand |
| Quend-Plage | 2.3 km SW | 18.1 °C | 2.7 km | Sand |
| Berck-Plage | 7.0 km N | 18.1 °C | 2.4 km | Sand |
| Stella-Plage | 18.0 km N | 17.7 °C | – | – |
| Le Touquet-Paris-Plage | 19.9 km N | 17.7 °C | 8.1 km | Sand |
| Sainte-Cécile-Plage | 26.0 km N | 17.7 °C | 2.1 km | Sand |
| Hardelot-Plage | 32.8 km N | 17.7 °C | – | – |
- Quend-Plage2.3 km SWCompare
- Berck-Plage7.0 km NCompare
- Stella-Plage18.0 km NCompare
- Le Touquet-Paris-Plage19.9 km NCompare
- Sainte-Cécile-Plage26.0 km NCompare
- Hardelot-Plage32.8 km NCompare
Data on this page
- Air temperature, rain, cloud, wind, humidity: NASA POWER climatology 2001–2020, 0.5° grid.
- Sea temperature: NOAA OISST v2.1 monthly normals 1991–2020, nearest ocean cell 13.8 km away.
- Beach outline, surface, rules and public facilities: OpenStreetMap contributors (ODbL), feature w299722813; restaurants, cafés, bars and lodging: Overture Maps places (CDLA-Permissive-2.0).
- Water body, status and length: Wikidata (CC0).
- Towns and time zone: GeoNames (CC BY 4.0). Airports: OurAirports (public domain). Sunrise and sunset: NOAA solar equations.
- Photos: Wikimedia Commons, author and licence under each image.
- Satellite view: Copernicus Sentinel-2 (ESA), scene S2B_31UCR_20260318_0_L2A.
- Orientation: OpenStreetMap land polygons (ODbL). Depth and terrain: GEBCO 2020 grid.
- Settlements: GeoNames places with 1,000+ inhabitants.
- Land cover: ESA WorldCover 2021, 10 m (CC BY 4.0).
- Search popularity: about 74K Google searches a month for the name (KeywordTool, October 2026).
Data compiled 2026-10-13. Something wrong? Report a data error.