Heligoland
Germany
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Heligoland, Germany

January and February, with an average sea temperature of 4.4°C (39.9°F), are months with the coldest seawater in Heligoland, Germany. Note: For swimming, this is considered very dangerous and immediately life-threatening. Weather in January »
January and February, with an average sea temperature of 4.4°C (39.9°F), are months with the coldest seawater in Heligoland, Germany. Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Weather in February »

In March, the average sea temperature in Heligoland, Germany, is 4.8°C (40.6°F). Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Weather in March »

In Heligoland, Germany, in April, the average water temperature is 8°C (46.4°F). Note: Swimming in 8°C (46.4°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 Heligoland, Germany, in May, the average water temperature is 11.5°C (52.7°F). Note: Swimming in 11.5°C (52.7°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in May »

In Heligoland, Germany, in June, the average water temperature is 15.3°C (59.5°F). Note: For swimming, a surface water temperature of 15.3°C (59.5°F) is not enjoyable for the majority. Weather in June »

In Heligoland, Germany, in July, the average water temperature is 17.4°C (63.3°F). Note: Swimming in 17.4°C (63.3°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 »

With an average sea temperature of 18.3°C (64.9°F), August is the month with the warmest seawater in Heligoland, Germany. Note: Swimming in 18.3°C (64.9°F) is not enjoyable for the majority. Weather in August »

In September, the average sea temperature in Heligoland, Germany, is 17.6°C (63.7°F). Note: For swimming, a surface water temperature of 17.6°C (63.7°F) is not enjoyable for the majority. Weather in September »

In Heligoland, Germany, the average seawater temperature in October is 14.3°C (57.7°F). Note: Swimming in 14.3°C (57.7°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 October »

In Heligoland, Germany, in November, the average water temperature is 11°C (51.8°F). Note: Swimming in 11°C (51.8°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in November »

In Heligoland, Germany, in December, the average water temperature is 6.9°C (44.4°F). Note: Swimming in 6.9°C (44.4°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 December »

When is the sea coldest in Heligoland?

Months with the coldest seawater are January and February, with an average sea temperature of 4.4°C (39.9°F).

When are the longest days in Heligoland?

June has the longest days of the year in Heligoland, Germany, with an average of 17.1h of daylight.

What is the month with the warmest sea water in Heligoland?

August is the month with the warmest seawater in Heligoland, with an average sea temperature of 18.3°C (64.9°F).

What is the month with the shortest days in Heligoland?

With an average of 7.4h of daylight, December has the shortest days of the year in Heligoland, Germany.
Average sea temperature - Heligoland, Germany

The best month for swimming (with the highest average sea temperature) is August (18.3°C).
Coldest months (with the lowest average sea temperature) are January and February (4.4°C).

Average daylight - Heligoland, Germany

The month with the longest days is June (Average daylight: 17.1h).
The month with shortest days is December (Average daylight: 7.4h).