Harlingen
Netherlands
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Harlingen, Netherlands

In January, the average sea temperature in Harlingen, Netherlands, is 6.2°C (43.2°F). Note: Swimming in 6.2°C (43.2°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 January »

In February, the average sea temperature in Harlingen, Netherlands, is 6°C (42.8°F). Note: Swimming in 6°C (42.8°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 February »

The month with the coldest seawater in Harlingen, Netherlands, is March, with an average sea temperature of 5.8°C (42.4°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 March »

In April, the average sea temperature in Harlingen, Netherlands, is 8.3°C (46.9°F). Note: Swimming in 8.3°C (46.9°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 April »

In Harlingen, Netherlands, in May, the average water temperature is 11.1°C (52°F). Note: Swimming in 11.1°C (52°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 Harlingen, Netherlands, in June, the average water temperature is 14.4°C (57.9°F). Note: Swimming in 14.4°C (57.9°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 June »

In Harlingen, Netherlands, in July, the average water temperature is 16.6°C (61.9°F). Note: For swimming, a surface water temperature of 16.6°C (61.9°F) is not enjoyable for the majority. Weather in July »

August and September, with an average sea temperature of 17.7°C (63.9°F), are months with the warmest seawater in Harlingen, Netherlands. Note: For swimming, a surface water temperature of 17.7°C (63.9°F) is not enjoyable for the majority. Weather in August »

August and September, with an average sea temperature of 17.7°C (63.9°F), are months with the warmest seawater in Harlingen, Netherlands. Note: Swimming in 17.7°C (63.9°F) is not enjoyable for the majority. Weather in September »

In Harlingen, Netherlands, in October, 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 October »

In Harlingen, Netherlands, in November, the average water temperature is 12.7°C (54.9°F). Note: Swimming in 12.7°C (54.9°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 December, the average sea temperature in Harlingen, Netherlands, is 9.2°C (48.6°F). Note: Swimming in 9.2°C (48.6°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in December »

What month is the sea coldest in Harlingen?

The month with the coldest seawater in Harlingen is March, with an average sea temperature of 5.8°C (42.4°F).

When are the longest days in Harlingen?

With an average of 16.9h of daylight, June has the longest days of the year in Harlingen, Netherlands.

When is the sea warmest in Harlingen?

Months with the warmest seawater are August and September, with an average sea temperature of 17.7°C (63.9°F).

What is the month with the shortest days in Harlingen?

With an average of 7.6h of daylight, December has the shortest days of the year.
Average sea temperature - Harlingen, Netherlands

Best months for swimming (with the highest average sea temperature) are August and September (17.7°C).
The coldest month (with the lowest average sea temperature) is March (5.8°C).

Average daylight - Harlingen, Netherlands

The month with the longest days is June (Average daylight: 16.9h).
The month with shortest days is December (Average daylight: 7.6h).