Weather in January
In
Bretteville,
France, the average seawater temperature in
January is 9.8°C (49.6°F).
Note: Beware of 9.8°C (49.6°F) waters at 13°C (55.4°F), they're uninviting, and a dip below 10°C (50°F) has risks of breath loss and cold shock, contingent on health.
Weather in January »Weather in February
Weather in March
March is the month with the coldest seawater in
Bretteville,
France, with an average sea temperature of 9.1°C (48.4°F).
Note: With an efficient thermal swimsuit, one can navigate 9.1°C (48.4°F) even if it's colder than 10°C (50°F); otherwise, rapid cold shock and breathlessness might set in.
Weather in March »
Weather in April
In
April, the average sea temperature in
Bretteville,
France, is 10.2°C (50.4°F).
Note: Diving into 10.2°C (50.4°F) is practical below 10°C (50°F), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe.
Weather in April »Weather in May
In
Bretteville,
France, in
May, the average water temperature is 11.9°C (53.4°F).
Note: It is life-risking to swim in 11.9°C (53.4°F). Briefly staying in 13°C (55.4°F) waters feels unsettling, and temperatures below 10°C (50°F) might result in cold shock and loss of breath control, hinging on personal endurance.
Weather in May »Weather in June
In
June, the average sea temperature in
Bretteville,
France, is 13.9°C (57°F).
Note: Swimming in 13.9°C (57°F) at temperatures under 10°C (50°F) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty.
Weather in June »
Weather in July
Weather in August
Weather in September
September is the month with the warmest seawater in
Bretteville,
France, with an average sea temperature of 17.7°C (63.9°F).
Note: For the majority, swimming in water with a temperature of 17.7°C (63.9°F) is not enjoyable.
Weather in September »
Weather in October
Weather in November
In
Bretteville,
France, the average seawater temperature in
November is 14.4°C (57.9°F).
Note: Swimming in 14.4°C (57.9°F) is deemed hazardous. Exposure to temperatures below 10°C (50°F) leads to immediate severe cold shock and hyperventilation.
Weather in November »Weather in December