Sea temperature in Denmark
Live water temperatures and swimming conditions across 58 beaches on the Denmark coast.
Best time to swim in Denmark
The sea in Denmark 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.
Denmark sea temperature history
Long-term climatology for Denmark 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 Denmark, 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.
Denmark sea temperature: frequently asked questions
What is the warmest month to swim in Denmark?
August is the warmest month in Denmark, when the sea averages about 18°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Denmark?
The coldest month in Denmark is typically February, when the water averages around 3°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Denmark without a wetsuit?
The sea in Denmark 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 Denmark?
Outside peak summer the water in Denmark 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 Denmark?
The long-term annual mean sea temperature in Denmark is about 10°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Denmark?
The live reading at the top of this page shows the current sea temperature in Denmark, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Denmark sea temperature by month
Average sea temperatures around Denmark for every month of the year, based on long-term Open-Meteo marine climatology.
| Month | Average sea | Swimming comfort |
|---|---|---|
| January | 4.0°C | Too cold for most |
| February | 3.0°C | Too cold for most |
| March | 3.0°C | Too cold for most |
| April | 5.0°C | Too cold for most |
| May | 9.0°C | Too cold for most |
| June | 13.0°C | Too cold for most |
| July | 17.0°C | Bracing — wetsuit advised |
| August ⭐ | 18.0°C | Swimmable, refreshing |
| September | 16.0°C | Bracing — wetsuit advised |
| October | 12.0°C | Too cold for most |
| November | 8.0°C | Too cold for most |
| December | 6.0°C | Too cold for most |
Monthly figures are modelled climatology averages, not live readings. How accurate is our data?
Warmest beaches in Denmark right now
| Beach | Region | Sea | Swim score |
|---|---|---|---|
| Klitmøller Beach | North Jutland | 8.7°C | Poor |
| Skagen Sonderstrand | North Jutland | 8.7°C | Poor |
| Fano Beach | West Jutland | 8.7°C | Poor |
| Charlottenlund Beach | Zealand | 8.7°C | Poor |
| Blokhus | North Sea Coast | 8.6°C | Poor |
| Blåvand Beach | South Jutland | 8.6°C | Poor |
| Fanø Beach | South Jutland | 8.6°C | Poor |
| Kandestederne Beach | North Jutland | 8.6°C | Poor |
| Marselisborg Beach | East Jutland | 8.6°C | Poor |
| Klitmoller Beach | West Jutland | 8.5°C | Poor |
| Hornbaek Beach | Zealand | 8.5°C | Poor |
| Bellevue | Baltic Coast | 8.4°C | Poor |
| Tornby Strand | North Jutland | 8.4°C | Poor |
| Sondervig Beach | West Jutland | 8.4°C | Poor |
| Blaavand Beach | West Jutland | 8.4°C | Poor |
| Aarhus Ballehage | East Jutland | 8.4°C | Poor |
| Karrebæksminde Beach | Region Zealand | 8.3°C | Poor |
| Lønstrup Beach | North Jutland | 8.3°C | Poor |
| Sandvig Beach | Bornholm | 8.3°C | Poor |
| Dueodde | Baltic Coast | 8.2°C | Poor |
| Løkken Beach | North Jutland | 8.2°C | Poor |
| Hirtshals Beach | North Jutland | 8.2°C | Poor |
| Marielyst Beach | Zealand | 8.2°C | Poor |
| Marielyst | Baltic Coast | 8.1°C | Poor |
| Agger Beach | West Jutland | 8.1°C | Poor |
| Tisvildeleje Beach | Zealand | 8.1°C | Poor |
| Liseleje Beach | Zealand | 8.1°C | Poor |
| Liseleje Beach | Capital Region | 8.0°C | Poor |
| Vorupør Beach | North Jutland | 8.0°C | Poor |
| Lokken Beach | North Jutland | 8.0°C | Poor |
| Tversted Beach | North Jutland | 8.0°C | Poor |
| Vester Husby Beach | Central Jutland | 7.9°C | Poor |
| Saksild Strand | Central Jutland | 7.9°C | Poor |
| Gammel Skagen | North Jutland | 7.9°C | Poor |
| Hundested Beach | Zealand | 7.9°C | Poor |
| Ebeltoft Beach | East Jutland | 7.9°C | Poor |
| Fjellerup Beach | East Jutland | 7.9°C | Poor |
| Bogense Beach | Funen | 7.9°C | Poor |
| Stevns Beach | Region Zealand | 7.8°C | Poor |
| Søndervig Beach | Central Jutland | 7.8°C | Poor |
| Vorupor Beach | West Jutland | 7.8°C | Poor |
| Amager Strand | Baltic Coast | 7.7°C | Poor |
| Hornbæk Beach | Capital Region | 7.7°C | Poor |
| Rømø Beach | South Jutland | 7.7°C | Poor |
| Grenen Beach | North Jutland | 7.7°C | Poor |
| Thyboron Beach | West Jutland | 7.7°C | Poor |
| Balka Beach | Bornholm | 7.7°C | Poor |
| Balka Strand | Bornholm | 7.6°C | Poor |
| Aeroe Beach | Funen | 7.6°C | Poor |
| Ronne Beach | Bornholm | 7.5°C | Poor |
| Skagen Sønderstrand | North Sea Coast | 7.4°C | Poor |
| Mommark Beach | South Jutland | 7.4°C | Poor |
| Saltum Beach | North Jutland | 7.4°C | Poor |
| Vejers Beach | West Jutland | 7.4°C | Poor |
| Henne Beach | West Jutland | 7.4°C | Poor |
| Middelfart Beach | Funen | 7.4°C | Poor |
| Hvide Sande Beach | Central Jutland | 7.3°C | Poor |
| Aabenraa Beach | South Jutland | 7.3°C | Poor |
Sea temperature in Denmark — FAQ
How warm is the sea in Denmark in November?
The sea off Denmark averages about 8.0°C in November, based on long-term monthly averages for this coast.
When is the best time to swim in Denmark?
Denmark is warmest in August (around 18.0°C) and coldest in February (around 3.0°C). There are typically 0 months a year when the water sits above 22°C.
What is the average yearly sea temperature in Denmark?
Across all twelve months, the sea in Denmark averages about 9.5°C.
Do you need a wetsuit to swim in Denmark?
The sea in Denmark stays below 22°C even at its warmest (~18.0°C in August), so a 3/2mm or thicker wetsuit is recommended for longer swims year-round.