Sea temperature in Norway
Live water temperatures and swimming conditions across 49 beaches on the Norway coast.
Best time to swim in Norway
The sea in Norway peaks in August, when the water averages around 17°C.
On average, 0 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
Outside peak season the water drops toward 6°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable.
The coldest month is typically February at around 3°C, when cold-water swimmers dominate the coast.
Norway sea temperature history
Long-term climatology for Norway shows an annual mean sea temperature of 9°C, ranging from 3°C in winter to 17°C at the summer peak.
The seasonal swing is roughly 14°C between the coldest and warmest month — a useful yardstick when comparing years or checking whether the current sea is running above or below average.
Recent decades have trended slightly warmer at Norway, in line with regional sea-surface temperature records for the wider basin.
Monthly averages below are drawn from multi-decadal climatology and are updated as new observations arrive.
Values are area averages; individual beaches vary by exposure and depth.
Norway sea temperature: frequently asked questions
What is the warmest month to swim in Norway?
August is the warmest month in Norway, when the sea averages about 17°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Norway?
The coldest month in Norway is typically February, when the water averages around 3°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Norway without a wetsuit?
The sea in Norway rarely climbs above 20°C, so a wetsuit is recommended year-round for anything longer than a quick dip.
Do I need a wetsuit in Norway?
Outside peak summer the water in Norway drops toward 6°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable. In peak months most swimmers go without.
What is the average sea temperature in Norway?
The long-term annual mean sea temperature in Norway is about 9°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Norway?
The live reading at the top of this page shows the current sea temperature in Norway, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.