Swimming in Denmark in september 2025 Sea temperature by city in september

In september in Denmark swimming conditions vary by city. Details below:

Swimming in september in Esbjerg, Nordborg, Ribe, Sherrebek, Sønderborg, Tønder, Varde and Ærøskøbing is possible but the sea is generally cool. So though the sea temperature may sometimes reach 68°F, it can also go as low as 59°F. Note that the average is 63°F.

Swimming in september in Copenhagen, Odense, Aarhus, Hirtshals, Marstal, Ringkøbing, Stege, Thisted, Fredericia, Frederikshavn, Greve, Læsø, Roskilde, Skagen, Snedsted (Thy National Park), Viborg, Aabenraa, Assens, Bogense, Charlottenlund, Dragør, Ebeltoft, Espergaerde, Faaborg, Frederiksværk, Gilleleje, Gråsten, Haderslev, Hadsund, Hals, Hanstholm, Harboore, Hellebaek, Holbaek, Hornbaek, Horsens, Humlebaek, Hundested, Hvide Sande, Hørsholm, Juelsminde, Kalundborg, Kerteminde, Kolding, Korsør, Køge, Lemvig, Liseleje, Lokken, Løgstør, Middelfart, Nakskov, Nexo, Niva, Norresundby, Nyborg, Nykobing Falster, Nykobing Mors, Nykobing Sjaelland, Præstø, Rodvig, Rudkøbing, Rødby, Rønne, Saeby, Sakskøbing, Skaelskor, Skive, Strandby, Svendborg, Thyboron, Vejle and Vordingborg is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average temperature of 62°F (min: 56°F/max: 67°F).

Forget about swimming in Faroe Islands and Tórshavn in september! The water temperature is freezing, reaching as low as 50°F (and only 54°F at the best of times). Our advice: plan on sightseeing, and don't bring your beach towel!