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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.

Jan
4°C
Feb
3°C
Mar
3°C
Apr
5°C
May
9°C
Jun
13°C
Jul
17°C
Aug
18°C
Sep
16°C
Oct
12°C
Nov
8°C
Dec
6°C

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.

Monthly average sea temperature in Denmark
MonthAverage sea
January4.0°C
February3.0°C
March3.0°C
April5.0°C
May9.0°C
June13.0°C
July17.0°C
August ⭐18.0°C
September16.0°C
October12.0°C
November8.0°C
December6.0°C

Monthly figures are modelled climatology averages, not live readings. How accurate is our data?

Warmest beaches in Denmark right now

BeachRegionSea
Saltum BeachNorth Jutland16.7°C
Stevns BeachRegion Zealand16.6°C
Søndervig BeachCentral Jutland16.6°C
Lokken BeachNorth Jutland16.6°C
Ebeltoft BeachEast Jutland16.6°C
Klitmøller BeachNorth Jutland16.5°C
Vorupør BeachNorth Jutland16.5°C
Skagen SonderstrandNorth Jutland16.5°C
Agger BeachWest Jutland16.5°C
DueoddeBaltic Coast16.4°C
Liseleje BeachCapital Region16.4°C
Karrebæksminde BeachRegion Zealand16.4°C
Mommark BeachSouth Jutland16.4°C
Tversted BeachNorth Jutland16.4°C
Hornbaek BeachZealand16.4°C
Fjellerup BeachEast Jutland16.4°C
Aeroe BeachFunen16.4°C
Bogense BeachFunen16.4°C
Lønstrup BeachNorth Jutland16.3°C
Henne BeachWest Jutland16.3°C
Charlottenlund BeachZealand16.3°C
Saksild StrandCentral Jutland16.2°C
Hirtshals BeachNorth Jutland16.2°C
Kandestederne BeachNorth Jutland16.2°C
Tisvildeleje BeachZealand16.2°C
Aarhus BallehageEast Jutland16.2°C
Tornby StrandNorth Jutland16.1°C
Hvide Sande BeachCentral Jutland16.0°C
Marielyst BeachZealand16.0°C
Marselisborg BeachEast Jutland16.0°C
Balka StrandBornholm15.9°C
Klitmoller BeachWest Jutland15.9°C
Skagen SønderstrandNorth Sea Coast15.8°C
BellevueBaltic Coast15.8°C
Hornbæk BeachCapital Region15.8°C
Amager StrandBaltic Coast15.7°C
Løkken BeachNorth Jutland15.7°C
Blåvand BeachSouth Jutland15.7°C
Vester Husby BeachCentral Jutland15.7°C
Rømø BeachSouth Jutland15.7°C
Blaavand BeachWest Jutland15.7°C
BlokhusNorth Sea Coast15.6°C
MarielystBaltic Coast15.5°C
Fanø BeachSouth Jutland15.5°C
Aabenraa BeachSouth Jutland15.5°C
Vorupor BeachWest Jutland15.5°C
Thyboron BeachWest Jutland15.5°C
Vejers BeachWest Jutland15.4°C
Fano BeachWest Jutland15.4°C
Sandvig BeachBornholm15.4°C
Liseleje BeachZealand15.4°C
Middelfart BeachFunen15.4°C
Grenen BeachNorth Jutland15.3°C
Gammel SkagenNorth Jutland15.3°C
Sondervig BeachWest Jutland15.3°C
Ronne BeachBornholm15.3°C
Balka BeachBornholm15.3°C
Hundested BeachZealand15.3°C

Sea temperature in Denmark — FAQ

How warm is the sea in Denmark in September?

The sea off Denmark averages about 16.0°C in September, 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.