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Weather & Climate in Mers-les-Bains, France
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mers-les-Bains experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 42°F in January while summers reach 64°F in July. The area gets 232 sunny days per year, above the national average. Annual precipitation totals 42.2 inches. The area receives 2.6 inches of snow annually. The city sits at an elevation of 16 feet.
Temperature
42°F Jan (6°C)
64°F Jul (18°C)
| Annual Average | 53.2°F |
| 1% below US avg | |
| January Average | 42°F (6°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 232 days/yr |
Geography
| Elevation | 16 ft (5 m) |
| Area | 2.1 sq mi (5.4 km²) |
| Population Density | 1,676/sq mi |
| Coordinates | 50.0654°N, 1.3881°W |
| Timezone | Europe/Paris |
Precipitation & Snow
Air Quality
Earthquake History
41 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Apr 28, 2007 | 1 km WNW of Lympne, United Kingdom | M4.6 | 117 km | 10 km |
| Oct 6, 1999 | 34 km NNW of Fécamp, France | M4.6 | 80 km | 1 km |
| Nov 30, 1994 | 17 km N of Courseulles-sur-Mer, France | M4.1 | 147 km | 6 km |
| Dec 14, 1991 | 3 km SSE of Longfossé, France | M4.0 | 70 km | 10 km |
| Jan 27, 1998 | 27 km W of Le Touquet-Paris-Plage, France | M3.8 | 50 km | 2 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 138 km | 12 km |
| Nov 2, 1997 | 7 km NW of Villers-sur-Mer, France | M3.7 | 130 km | 10 km |
| Sep 23, 2003 | 41 km WNW of Étretat, France | M3.6 | 125 km | 10 km |
| Mar 3, 2009 | 1 km ENE of Hawkinge, United Kingdom | M3.5 | 118 km | 4 km |
| Jan 27, 1992 | 6 km SSE of Longfossé, France | M3.5 | 68 km | 10 km |
| Aug 1, 2007 | 2 km SSE of Blonville-sur-Mer, France | M3.5 | 128 km | 5 km |
| Sep 24, 2003 | 22 km WNW of Cauville-sur-Mer, France | M3.5 | 117 km | 17 km |
| Jun 16, 1998 | 18 km NNW of Yport, France | M3.3 | 89 km | 5 km |
| Oct 19, 2002 | 9 km NW of Trouville-sur-Mer, France | M3.2 | 122 km | 10 km |
| Oct 25, 1998 | 6 km NNE of Montdidier, France | M3.2 | 96 km | 7 km |
| Feb 13, 1997 | 26 km W of Le Touquet-Paris-Plage, France | M3.2 | 52 km | 5 km |
| Feb 27, 2005 | 1 km NW of Libercourt, France | M3.1 | 124 km | 4 km |
| May 4, 1990 | 0 km NE of Coquelles, France | M3.1 | 102 km | 10 km |
| Jun 1, 2005 | 3 km N of Grandvilliers, France | M3.1 | 57 km | 10 km |
| Aug 26, 2002 | 40 km NNW of Étretat, France | M3.0 | 100 km | 4 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 6.0 m (20 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1858 | NORTH SEA | Unknown | 6.0 m | — | 108 km |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | — | 116 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 2.6 in | |
| February | 40°F (5°C) | 2.1 in | Coldest |
| March | 44°F (7°C) | 2.0 in | |
| April | 48°F (9°C) | 1.9 in | |
| May | 54°F (12°C) | 2.1 in | |
| June | 59°F (15°C) | 2.2 in | |
| July | 64°F (18°C) | 1.9 in | Warmest, Driest |
| August | 63°F (17°C) | 2.0 in | |
| September | 59°F (15°C) | 2.7 in | |
| October | 53°F (12°C) | 2.9 in | |
| November | 46°F (8°C) | 3.2 in | Wettest |
| December | 41°F (5°C) | 3.0 in |
Mers-les-Bains has a seasonal temperature swing of 24°F / from 40°F in February to 64°F in July. Total annual precipitation is 28.5 inches, with November being the wettest month (3.2") and July the driest (1.9").