Monthly weather forecast and climate
Siglufjörður, Iceland

Weather in January

In Siglufjörður, Iceland, in January, the average water temperature is 3.3°C (37.9°F). Note: For swimming, this is considered very dangerous and immediately life-threatening. Weather in January »

Weather in February

The month with the coldest seawater in Siglufjörður, Iceland, is February, with an average sea temperature of 1.9°C (35.4°F). Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Weather in February »

Weather in March

In Siglufjörður, Iceland, the average seawater temperature in March is 2.1°C (35.8°F). Note: For swimming, this is considered life-threatening and very dangerous. Weather in March »

Weather in April

In April, the average sea temperature in Siglufjörður, Iceland, is 2.9°C (37.2°F). Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Weather in April »

Weather in May

In Siglufjörður, Iceland, in May, the average water temperature is 3.9°C (39°F). Note: For swimming, this is considered life-threatening and very dangerous. Weather in May »

Weather in June

In June, the average sea temperature in Siglufjörður, Iceland, is 5.9°C (42.6°F). Note: Swimming in 5.9°C (42.6°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in June »

Weather in July

In Siglufjörður, Iceland, the average seawater temperature in July is 8.4°C (47.1°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 July »

Weather in August

With an average sea temperature of 9.2°C (48.6°F), August is the month with the warmest seawater in Siglufjörður, Iceland. 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 August »

Weather in September

In Siglufjörður, Iceland, in September, the average water temperature is 7.2°C (45°F). Note: Swimming in 7.2°C (45°F) is considered life-threatening. Weather in September »

Weather in October

In Siglufjörður, Iceland, the average seawater temperature in October is 5.4°C (41.7°F). Note: Swimming in 5.4°C (41.7°F) is considered dangerous. Weather in October »

Weather in November

In Siglufjörður, Iceland, in November, the average water temperature is 4.8°C (40.6°F). Note: For swimming, this is considered life-threatening and very dangerous. Weather in November »

Weather in December

In Siglufjörður, Iceland, in December, the average water temperature is 4.4°C (39.9°F). Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Weather in December »
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FAQ

What month is the sea coldest in Siglufjörður?

With an average sea temperature of 1.9°C (35.4°F), February is the month with the coldest seawater in Siglufjörður, Iceland.

When are the longest days in Siglufjörður?

The month with the longest days in Siglufjörður is June, with an average of 23.6h of daylight.

When is the sea warmest in Siglufjörður?

The month with the warmest seawater in Siglufjörður, Iceland, is August, with an average sea temperature of 9.2°C (48.6°F).

What is the month with the shortest days in Siglufjörður?

December has the shortest days of the year, with an average of 3h of daylight.

Average sea temperature
Siglufjörður, Iceland

Average sea temperature - Siglufjörður, Iceland

The best month for swimming (with the highest average sea temperature) is August (9.2°C).
The coldest month (with the lowest average sea temperature) is February (1.9°C).

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Average daylight
Siglufjörður, Iceland

Average daylight - Siglufjörður, Iceland

The month with the longest days is June (Average daylight: 23.6h).
The month with the shortest days is December (Average daylight: 3h).

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