Sea temperature in Sweden
Live water temperatures and swimming conditions across 82 beaches on the Sweden coast.
Best time to swim in Sweden
The sea in Sweden peaks in August, when the water averages around 18°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 2°C, when cold-water swimmers dominate the coast.
Sweden sea temperature history
Long-term climatology for Sweden shows an annual mean sea temperature of 9°C, ranging from 2°C in winter to 18°C at the summer peak.
The seasonal swing is roughly 16°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 Sweden, 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.
Sweden sea temperature: frequently asked questions
What is the warmest month to swim in Sweden?
August is the warmest month in Sweden, when the sea averages about 18°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Sweden?
The coldest month in Sweden is typically February, when the water averages around 2°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Sweden without a wetsuit?
The sea in Sweden 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 Sweden?
Outside peak summer the water in Sweden 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 Sweden?
The long-term annual mean sea temperature in Sweden is about 9°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Sweden?
The live reading at the top of this page shows the current sea temperature in Sweden, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Coastal regions of Sweden
Region hubs with live sea temperatures, swim conditions and a beach directory.