Copenhagen tide times

Copenhagen faces the Øresund strait from the western shore, the eleven-kilometre channel that separates Denmark from Sweden and connects the Kattegat to the Baltic proper. The tide here is small — genuinely small, not just modest. Mean astronomical range in the inner harbour is around 10 to 30 cm, which is close to the limit of what most people would call a tide at all.

The Baltic Sea is essentially enclosed, and the narrow connection to the North Sea via the Danish straits means the ocean tide dissipates almost entirely before it reaches Copenhagen. What moves the water at Amalienborg, along Nyhavn canal, or past the harbour-bath pontoons at Islands Brygge is primarily wind and atmospheric pressure, not the moon. A sustained southwesterly during an autumn storm can push water 50 cm or more above the mean — more than the entire predicted tide range, and in any direction depending on the wind.

That distinction matters if you are planning around a specific water level: the astronomical prediction is nearly irrelevant compared to the weather forecast. DMI (Danmarks Meteorologiske Institut) publishes the authoritative sea-level and storm-surge predictions for Danish waters and is the source to consult before any coastal activity that depends on precise water level at Copenhagen. The harbour-bath culture that has taken hold at Islands Brygge, Sandkaj in Nordhavn, and the newer pontoons in Sydhavn reflects the low-energy, low-tidal-range character of the Øresund coast.

The water moves slowly, the current is gentle, and the tidal variation is so small that the bathing platforms can be fixed infrastructure rather than floating pontoons designed to follow a two-metre rise and fall. Nyhavn canal reverses its slow current with wind shifts more than with any tidal signal. The Øresund Bridge to Malmö carries motorway and rail traffic above the strait; the current under the bridge and at the Drogden and Flinterenden channels either side of Saltholm Island is driven by the sea-level difference between the Kattegat and the Baltic, which wind and atmospheric pressure control.

Kayakers paddling out of Christianshavn or crossing the harbour approach at Refshaleøen read the wind forecast, not the tide table. Shore anglers along the Amager Strandpark and the Kastrup coast fish for flatfish, sea trout, and eels on the slow Øresund current; the water clarity in the outer Øresund is noticeably better than the inner harbour reach. The predictions on this page come from Open-Meteo Marine, a gridded global ocean model.

3 metres on height — can exceed the actual astronomical signal. Treat the predicted highs and lows as approximate, and weight DMI's sea-level and surge forecasts heavily.