Monthly weather forecast and climate
De Haan, Belgium

Weather in January

In De Haan, Belgium, the average seawater temperature in January is 7.3°C (45.1°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in January »

Weather in February

In De Haan, Belgium, in February, the average water temperature is 7.2°C (45°F). Note: Swimming in 7.2°C (45°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in February »

Weather in March

March is the month with the coldest seawater in De Haan, Belgium, with an average sea temperature of 7.1°C (44.8°F). Note: Swimming in 7.1°C (44.8°F) is considered life-threatening. Weather in March »

Weather in April

In April, the average sea temperature in De Haan, Belgium, is 9.2°C (48.6°F). Note: Swimming in 9.2°C (48.6°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 April »

Weather in May

In De Haan, Belgium, in May, the average water temperature is 11.8°C (53.2°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in May »

Weather in June

In June, the average sea temperature in De Haan, Belgium, is 14.8°C (58.6°F). Note: Swimming in 14.8°C (58.6°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 June »

Weather in July

In De Haan, Belgium, in July, the average water temperature is 16.8°C (62.2°F). Note: For most, swimming in 16.8°C (62.2°F) is not an enjoyable activity. Weather in July »

Weather in August

With an average sea temperature of 18.4°C (65.1°F), August is the month with the warmest seawater in De Haan, Belgium. Note: For swimming, a surface water temperature of 18.4°C (65.1°F) is not enjoyable for the majority. Weather in August »

Weather in September

In De Haan, Belgium, in September, the average water temperature is 18.2°C (64.8°F). Note: For most, swimming in 18.2°C (64.8°F) is not an enjoyable activity. Weather in September »

Weather in October

In De Haan, Belgium, in October, the average water temperature is 16.1°C (61°F). Note: For most, swimming in 16.1°C (61°F) is not an enjoyable activity. Weather in October »

Weather in November

In November, the average sea temperature in De Haan, Belgium, is 13.8°C (56.8°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in November »

Weather in December

In December, the average sea temperature in De Haan, Belgium, is 10.5°C (50.9°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in December »
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FAQ

When is the sea coldest in De Haan?

March is the month with the coldest seawater in De Haan, with an average sea temperature of 7.1°C (44.8°F).

When are the longest days in De Haan?

With an average of 16.5h of daylight, June has the longest days of the year.

When is the sea warmest in De Haan?

The month with the warmest seawater in De Haan, Belgium, is August, with an average sea temperature of 18.4°C (65.1°F).

What is the month with the shortest days in De Haan?

With an average of 8h of daylight, December has the shortest days of the year.

Average sea temperature
De Haan, Belgium

Average sea temperature - De Haan, Belgium

The best month for swimming (with the highest average sea temperature) is August (18.4°C).
The coldest month (with the lowest average sea temperature) is March (7.1°C).

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Average daylight
De Haan, Belgium

Average daylight - De Haan, Belgium

The month with the longest days is June (Average daylight: 16.5h).
The month with the shortest days is December (Average daylight: 8h).

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