La Seyne-sur-Mer
France
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
La Seyne-sur-Mer, France

In La Seyne-sur-Mer, France, in January, the average water temperature is 13.4°C (56.1°F). Note: Swimming in 13.4°C (56.1°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in January »
February is the month with the coldest seawater in La Seyne-sur-Mer, France, with an average sea temperature of 13°C (55.4°F). Note: Swimming in 13°C (55.4°F) is considered dangerous. Weather in February »

In La Seyne-sur-Mer, France, in March, the average water temperature is 13.3°C (55.9°F). Note: Swimming in 13.3°C (55.9°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique. Weather in March »

In La Seyne-sur-Mer, France, in April, the average water temperature is 14.4°C (57.9°F). Note: Swimming in 14.4°C (57.9°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in April »

In La Seyne-sur-Mer, France, in May, the average water temperature is 17.1°C (62.8°F). Note: For most, swimming in 17.1°C (62.8°F) is not an enjoyable activity. Weather in May »

In June, the average sea temperature in La Seyne-sur-Mer, France, is 20.8°C (69.4°F). Note: Swimming in 20.8°C (69.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F). Weather in June »

In July, the average sea temperature in La Seyne-sur-Mer, France, is 21.6°C (70.9°F). Note: Swimming in 21.6°C (70.9°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F). Weather in July »

August is the month with the warmest seawater in La Seyne-sur-Mer, France, with an average sea temperature of 22.3°C (72.1°F). Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. Weather in August »

In La Seyne-sur-Mer, France, the average seawater temperature in September is 21.8°C (71.2°F). Note: Swimming in 21.8°C (71.2°F) is not enjoyable for the majority. Weather in September »

In October, the average sea temperature in La Seyne-sur-Mer, France, is 19.2°C (66.6°F). Note: For swimming, a surface water temperature of 19.2°C (66.6°F) is not enjoyable for the majority. Weather in October »

In La Seyne-sur-Mer, France, the average seawater temperature in November is 17.3°C (63.1°F). Note: For most, swimming in 17.3°C (63.1°F) is not an enjoyable activity. Weather in November »

In La Seyne-sur-Mer, France, in December, the average water temperature is 15°C (59°F). Note: Swimming in 15°C (59°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F). Weather in December »

What month is the sea coldest in La Seyne-sur-Mer?

With an average sea temperature of 13°C (55.4°F), February is the month with the coldest seawater in La Seyne-sur-Mer.

When are the longest days in La Seyne-sur-Mer?

With an average of 15.3h of daylight, June has the longest days of the year.

What month is the sea warmest in La Seyne-sur-Mer?

The month with the warmest seawater in La Seyne-sur-Mer is August, with an average sea temperature of 22.3°C (72.1°F).

What is the month with the shortest days in La Seyne-sur-Mer?

December has the shortest days of the year, with an average of 9.1h of daylight.
Average sea temperature - La Seyne-sur-Mer, France

The best month for swimming (with the highest average sea temperature) is August (22.3°C).
The coldest month (with the lowest average sea temperature) is February (13°C).

Average daylight - La Seyne-sur-Mer, France