Mers-les-Bains Beach sea temperature
Sea-surface temperature for Mers-les-Bains Beach, France, with the 7-day outlook and what to wear.
What is the sea temperature at Mers-les-Bains Beach today? (3 Sept)
The sea at Mers-les-Bains Beach is 20.5 °C today. Most people want a shorty, especially once the wind picks up. The sea and the air are within a degree or so of each other.
Mers-les-Bains Beach sea temperature — next 7 days
Sea temperature varies by under 1.4 °C across the week.
| Date | Sea temp | Range | Suggested wetsuit |
|---|---|---|---|
| Thu 3 Septtoday | 20.5 °C | 20.4–20.5 °C | 2 mm shorty or spring suit |
| Fri 4 Sept | 20.5 °C | 20.4–20.7 °C | 2 mm shorty or spring suit |
| Sat 5 Sept | 20.6 °C | 20.4–20.8 °C | 2 mm shorty or spring suit |
| Sun 6 Sept | 20.6 °C | 20.4–20.7 °C | 2 mm shorty or spring suit |
| Mon 7 Sept | 20.7 °C | 20.5–20.8 °C | 2 mm shorty or spring suit |
| Tue 8 Sept | 20.5 °C | 20.4–20.7 °C | 2 mm shorty or spring suit |
| Wed 9 Sept | 19.9 °C | 19.4–20.3 °C | 2 mm shorty or spring suit |
Figures are modelled sea-surface temperature, not readings from a buoy or a thermometer in the shallows — expect a degree either way, and more in a shallow bay on a hot afternoon. Wetsuit suggestions are general guidance: cold tolerance varies a lot between people, and wind, session length and air temperature matter as much as the water does.
What wetsuit for what sea temperature?
| Sea temperature | Wetsuit | Extras |
|---|---|---|
| 24 °C and above | Boardshorts or swimsuit | — |
| 22–24 °C | Rash vest or 1 mm top | — |
| 19–22 °CMers-les-Bains Beach today | 2 mm shorty or spring suit | — |
| 17–19 °C | 3/2 mm full suit | — |
| 14–17 °C | 4/3 mm full suit | boots on longer sessions |
| 11–14 °C | 5/4 mm full suit | boots and gloves |
| 7–11 °C | 5/4/3 mm hooded full suit | boots and gloves |
| Below 7 °C | 6/5 mm hooded full suit | thick boots and gloves |
Conditions at Mers-les-Bains Beach
Water temperature is one input. For wave height, wind and a 0–100 score per sport and ability level, see the full forecast.
Frequently asked questions.
What is the sea temperature at Mers-les-Bains Beach today?
The sea at Mers-les-Bains Beach, France is 20.5 °C today. This is modelled sea-surface temperature rather than a buoy reading, so allow a degree either way.
What wetsuit do I need at Mers-les-Bains Beach?
At 20.5 °C, 2 mm shorty or spring suit is the usual choice at Mers-les-Bains Beach. Most people want a shorty, especially once the wind picks up. Cold tolerance varies, and wind and session length matter as much as the water temperature.
Is the sea warm enough to swim at Mers-les-Bains Beach?
At 20.5 °C the sea at Mers-les-Bains Beach is comfortable for swimming without neoprene for most people.
How much does the sea temperature at Mers-les-Bains Beach change over a week?
Over the next 7 days the sea at Mers-les-Bains Beach stays between 19.4 °C and 20.8 °C. Open water changes temperature slowly, so it rarely moves much inside a week — seasonal change is what matters.
