Harstad
Norway
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Harstad, Norway

In Harstad, Norway, the average seawater temperature in January is 4.8°C (40.6°F). Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Weather in January »

In February, the average sea temperature in Harstad, Norway, is 4.3°C (39.7°F). Note: For swimming, this is considered very dangerous and immediately life-threatening. Weather in February »

With an average sea temperature of 3.8°C (38.8°F), March is the month with the coldest seawater in Harstad, Norway. Note: For swimming, this is considered life-threatening and very dangerous. Weather in March »

In Harstad, Norway, the average seawater temperature in April is 4.4°C (39.9°F). Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Weather in April »

In May, the average sea temperature in Harstad, Norway, is 6.3°C (43.3°F). Note: Swimming in 6.3°C (43.3°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 June, the average sea temperature in Harstad, Norway, is 9.7°C (49.5°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 June »

In Harstad, Norway, in July, the average water temperature is 12°C (53.6°F). Note: Swimming in 12°C (53.6°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 July »

August is the month with the warmest seawater in Harstad, Norway, with an average sea temperature of 12.3°C (54.1°F). Note: Swimming in 12.3°C (54.1°F) is considered dangerous. Weather in August »

In Harstad, Norway, the average seawater temperature in September is 10.7°C (51.3°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 September »

In October, the average sea temperature in Harstad, Norway, is 8.7°C (47.7°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 October »

In Harstad, Norway, the average seawater temperature in November is 7.8°C (46°F). Note: Swimming in 7.8°C (46°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 Harstad, Norway, the average seawater temperature in December is 6.4°C (43.5°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 »

What is the month with the coldest sea water in Harstad?

March is the month with the coldest seawater in Harstad, with an average sea temperature of 3.8°C (38.8°F).

When are the longest days in Harstad?

With an average of 24h of daylight, June has the longest days of the year in Harstad, Norway.

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

August is the month with the warmest seawater, with an average sea temperature of 12.3°C (54.1°F).

What is the month with the shortest days in Harstad?

December has the shortest days of the year, with an average of 0.1h of daylight.
Average sea temperature - Harstad, Norway

The best month for swimming (with the highest average sea temperature) is August (12.3°C).
The coldest month (with the lowest average sea temperature) is March (3.8°C).

Average daylight - Harstad, Norway