Bellevue — Sea temperature now
Copenhagen's near-by Arne-Jacobsen-designed beach.
Fresh water with a light chop and a light breeze — fresh conditions — a wetsuit is recommended.
Location
Bellevue on the map, with nearby beaches and live sea temperatures.
7-day forecast
Water, air, waves, wind and UV outlook for the week ahead.
Monthly sea temperature averages
Typical year-round water temperature, based on regional climatology.
Best time to swim in Bellevue
The sea in Bellevue 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 7°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.
Bellevue sea temperature history
Long-term climatology for Bellevue shows an annual mean sea temperature of 10°C, ranging from 3°C in winter to 18°C at the summer peak.
The seasonal swing is roughly 15°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 Bellevue, 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.
Bellevue sea temperature: frequently asked questions
What is the warmest month to swim in Bellevue?
August is the warmest month in Bellevue, when the sea averages about 18°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Bellevue?
The coldest month in Bellevue is typically February, when the water averages around 3°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Bellevue without a wetsuit?
The sea in Bellevue 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 Bellevue?
Outside peak summer the water in Bellevue drops toward 7°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 Bellevue?
The long-term annual mean sea temperature in Bellevue is about 10°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Bellevue?
The live reading at the top of this page shows the current sea temperature in Bellevue, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Year-round sea temperature
| Month | Sea | Comfort |
|---|---|---|
| Jan | 4°C | Cold |
| Feb | 3°C | Cold |
| Mar | 3°C | Cold |
| Apr | 5°C | Cold |
| May | 9°C | Cold |
| Jun | 13°C | Cold |
| Jul | 17°C | Bracing |
| Aug ⭐ | 18°C | Pleasant |
| Sep | 16°C | Bracing |
| Oct | 12°C | Cold |
| Nov | 8°C | Cold |
| Dec | 6°C | Cold |