Water temperature in Mers-les-Bains
Sea surface temperature · updated today, Thursday, October 29, at 8:15 am (CET)- Today
- 56.8–57.2 °F
- Air today
- 43 / 58 °F
- Wed 4
- 55.5 °F
- Wetsuit
- 5/4 mm with booties
Today the water in Mers-les-Bains is 56.8 °F and ranges 56.8–57.2 °F through the day, with the air between 43 °F and 58 °F. It cools over the next few days: about 55.5 °F by Wednesday 4.
Measured by satellite
This is the temperature satellites measured 2 days ago in the water just below the surface, at the nearest point of sea to Mers-les-Bains (0.5 mi away), from NASA's MUR analysis, which sees the water in 1 km detail. It isn't a forecast: the big figure above is what a model gives for right now. On sunny afternoons the top of the water can be a little warmer.
Big gap with the model, which gives 56.8 °F right now (3.1 °F lower). The forecast is a calculation and this is a measurement: the water is probably warmer than the model says.
Satellite: NASA MUR (JPL MUR MEaSUREs, PO.DAAC), doi:10.5067/GHGMR-4FJ04. Sources and licenses
The water over the next few days
- Today
- Fri 30
- Sat 31
- Sun 1
- Mon 2
- Tue 3
- Wed 4
- Thu 5
- Fri 6
- Sat 7
Water over the last 60 days
Over these days it has dropped 12.2 °F (from August 30).
Over the next few weeks the water looks a bit above normal (+0.7 °F), according to ECMWF 46-day.
Daily average and its range (low and high). The dotted line is the forecast.
Water temperature by month vs. normal
The water off Mers-les-Bains is about normal for late October today.
- 46.8° 47°JanJ
- 45.3° 45°FebF
- 45.9° 46°MarM
- 49.1° 49°AprA
- 53.4° 53°MayM
- 58.4° 58°JunJ
- 62.6° 63°JulJ
- 65.3° 65°AugA
- 64.0° 64°SepS
- 60.1° 60°OctO
- 55.2° 55°NovN
- 50.4° 50°DecD
- Monthly normal
- Today
- Best time
The best time to swim in Mers-les-Bains is from August to September, when the water averages 64.0–65.3 °F.
The water is warmest in August (65.3 °F on average) and coldest in February (45.3 °F).
Monthly averages for 1991–2020 (NOAA OISST, from satellites and buoys; nearest data point 5.3 mi away). Right by the shore, the water can be a little colder or warmer. Sources and licenses
Water and air, day by day
| Day | Water | Air | Max wave |
|---|---|---|---|
| Today | 56.8–57.2 °F | 43 / 58 °F | 2.8 ft |
| Fri 30 | 56.8–57.0 °F | 39 / 57 °F | 1.4 ft |
| Sat 31 | 56.5–56.7 °F | 38 / 53 °F | 1.5 ft |
| Sun 1 | 56.3–56.5 °F | 47 / 53 °F | 1.6 ft |
| Mon 2 | 55.9–56.1 °F | 48 / 57 °F | 4.3 ft |
| Tue 3 | 55.6–55.9 °F | 44 / 51 °F | 3.5 ft |
| Wed 4 | 55.4–55.6 °F | 39 / 51 °F | 2.4 ft |
Which wetsuit to wear
| Water | Wetsuit | How it feels |
|---|---|---|
| < 52 °F | 6/5 mm with hood, booties and gloves | Very cold: full kit only |
| 52°–57 °F | 5/4 mm with booties | Cold: takes your breath away |
| 57°–63 °F | 4/3 mm | Cool |
| 63°–66 °F | 3/2 mm | Mild |
| 66°–72 °F | Shorty (springsuit) | Pleasant |
| 72°–75 °F | Rash guard or top | Very pleasant |
| > 75 °F | No wetsuit | Warm |
A rough guide: it depends on the wind, how long you stay in and each person.
Fish are cold-blooded: the water sets their activity. Sudden temperature changes usually put them off the bite; with steady water, activity is more regular.
Previous days
The water over the last 60 days.
| Day | Water | Low / high |
|---|---|---|
| Wed 28 | 57.2 °F | 57.0–57.2 °F |
| Tue 27 | 57.4 °F | 57.2–57.4 °F |
| Mon 26 | 57.0 °F | 57.0–57.4 °F |
| Sun 25 | 57.7 °F | 57.4–57.7 °F |
| Sat 24 | 57.7 °F | 57.6–58.3 °F |
| Fri 23 | 58.8 °F | 58.5–59.0 °F |
| Thu 22 | 59.2 °F | 59.0–59.5 °F |
Show all 60 days
| Day | Water | Low / high |
|---|---|---|
| Wed 21 | 59.9 °F | 59.5–60.1 °F |
| Tue 20 | 60.1 °F | 60.1–60.3 °F |
| Mon 19 | 60.3 °F | 60.3–60.6 °F |
| Sun 18 | 60.8 °F | 60.6–61.2 °F |
| Sat 17 | 61.7 °F | 61.2–62.2 °F |
| Fri 16 | 62.4 °F | 62.2–62.6 °F |
| Thu 15 | 62.4 °F | 62.2–62.8 °F |
| Wed 14 | 62.2 °F | 62.1–62.4 °F |
| Tue 13 | 62.2 °F | 62.1–62.4 °F |
| Mon 12 | 62.1 °F | 62.1–62.2 °F |
| Sun 11 | 62.6 °F | 62.4–63.0 °F |
| Sat 10 | 63.3 °F | 63.0–63.9 °F |
| Fri 9 | 63.9 °F | 63.7–64.0 °F |
| Thu 8 | 64.6 °F | 64.2–65.3 °F |
| Wed 7 | 65.7 °F | 65.5–66.2 °F |
| Tue 6 | 66.2 °F | 65.8–66.4 °F |
| Mon 5 | 66.2 °F | 65.8–66.6 °F |
| Sun 4 | 66.0 °F | 65.8–66.2 °F |
| Sat 3 | 66.2 °F | 66.0–66.4 °F |
| Fri 2 | 66.6 °F | 66.2–66.7 °F |
| Thu 1 | 66.7 °F | 66.6–66.7 °F |
| Wed 30 | 66.7 °F | 66.6–67.1 °F |
| Tue 29 | 66.9 °F | 66.4–67.5 °F |
| Mon 28 | 66.7 °F | 66.6–66.9 °F |
| Sun 27 | 66.7 °F | 66.4–67.1 °F |
| Sat 26 | 66.7 °F | 66.6–66.9 °F |
| Fri 25 | 66.7 °F | 66.2–67.3 °F |
| Thu 24 | 66.6 °F | 66.2–66.9 °F |
| Wed 23 | 66.4 °F | 66.0–66.6 °F |
| Tue 22 | 66.4 °F | 66.0–66.9 °F |
| Mon 21 | 66.2 °F | 65.8–66.7 °F |
| Sun 20 | 66.0 °F | 66.0–66.2 °F |
| Sat 19 | 66.0 °F | 65.8–66.2 °F |
| Fri 18 | 66.4 °F | 66.2–66.7 °F |
| Thu 17 | 67.1 °F | 66.7–67.5 °F |
| Wed 16 | 67.6 °F | 67.3–68.0 °F |
| Tue 15 | 68.0 °F | 67.6–68.2 °F |
| Mon 14 | 67.8 °F | 67.5–68.2 °F |
| Sun 13 | 67.5 °F | 67.5–67.6 °F |
| Sat 12 | 67.5 °F | 67.3–67.6 °F |
| Fri 11 | 67.3 °F | 67.1–67.6 °F |
| Thu 10 | 67.5 °F | 67.3–67.6 °F |
| Wed 9 | 67.8 °F | 67.6–68.4 °F |
| Tue 8 | 68.7 °F | 68.4–68.9 °F |
| Mon 7 | 68.7 °F | 68.4–68.9 °F |
| Sun 6 | 68.7 °F | 68.2–69.4 °F |
| Sat 5 | 68.5 °F | 68.2–68.7 °F |
| Fri 4 | 68.7 °F | 68.5–68.9 °F |
| Thu 3 | 68.5 °F | 68.4–68.7 °F |
| Wed 2 | 68.5 °F | 68.2–68.9 °F |
| Tue 1 | 68.9 °F | 68.5–69.1 °F |
| Mon 31 | 69.1 °F | 68.9–69.3 °F |
| Sun 30 | 69.4 °F | 69.3–69.6 °F |
It's the daily analysis from Météo-France / Copernicus Marine (satellites, buoys and model), not a buoy reading at this spot.
Questions about the water in Mers-les-BainsQuestions
What's the water temperature today in Mers-les-Bains?
56.8 °F; through the day it ranges 56.8–57.2 °F.
Will the water get warmer or colder?
It cools over the next few days: about 55.5 °F by Wednesday 4.
Which wetsuit do I need today?
With the water as it is today, 5/4 mm with booties (cold: takes your breath away). It's a rough guide: it depends on the wind and each person.
How warm is the water in Mers-les-Bains in October?
In October, the water in Mers-les-Bains averages 60.1 °F (1991–2020). For a long swim: 4/3 mm (cool).
How warm is the water in Mers-les-Bains in August?
In August, the water in Mers-les-Bains averages 65.3 °F (1991–2020), the warmest of the year. For a long swim: 3/2 mm (mild).
When is the best time to swim in Mers-les-Bains?
The best time to swim in Mers-les-Bains is from August to September, when the water averages 64.0–65.3 °F. The water is warmest in August (65.3 °F on average) and coldest in February (45.3 °F).
Is the water warmer or colder than normal?
The water off Mers-les-Bains is about normal for late October today.
More about Mers-les-Bains today
Water temperature near Mers-les-Bains
- Criel-sur-Mer 56.8 °F · 4.8 mi
- Cayeux-sur-Mer 57.2 °F · 9.3 mi
- Saint-Valery-sur-Somme 59.5 °F · 14 mi
- Dieppe 57.6 °F · 17 mi
- Groffliers 58.1 °F · 24 mi
- Saint-Valery-en-Caux 57.9 °F · 32 mi
Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.
Learn more
Sea surface temperature: Open-Meteo with Météo-France / Copernicus Marine, CC BY 4.0; grid point 4.6 mi away. Near the shore, in coves and estuaries, the water can be a little colder or warmer.
Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 8:15 am (local time).
Spotted a mistake? Tell us · Where the weather and sea data come from