Denmark · coast guide
Understanding the coast of Denmark
This guide explains the coast of Denmark on the North Sea, the Baltic Sea; calculations, observations and product limits remain distinct.
Read a local tide
Times and heights depend on the port, datum and station timezone. Denmark’s coasts face the North Sea, Skagerrak, Kattegat and Baltic. DMI gives both LAT and MSL in its products; read that reference with place and time. A level in one datum cannot be directly compared with another without the required conversion. A value from another place cannot be carried to a nearby beach. Mareloa preserves the source and timestamp of its data but does not replace the national hydrographic reference.
Tidal range and coast
The tide is not uniform from the exposed west coast to inland waters. Local forms, currents and coastal geometry alter the visible difference between high and low water. Do not use one national range as a measure of access to a particular beach or harbour. Tidal range is the vertical difference between low and high water. Bays, depth and coastal shape change it, so one astronomical cycle does not create the same range everywhere. Mareloa creates no national coefficient for Denmark and infers no access from one number.
Prediction, model and observation
DMI separates astronomical tide from measured water level. Weather can shift actual water level, while a measurement describes only its station and time. Keep the two tracks separate, and use timestamp and reference before interpreting a difference. An astronomical prediction calculates a periodic component. A model adds assumptions; an observation is a measurement at a station and time. Wind, pressure, waves and geography can change actual level. These categories remain separate and missing evidence never becomes reassuring.
Plan a coast visit
Bathing, fishing, nature protection and access depend on the particular place. Look for authority notices, local rules and signs before visiting sea or fjord. The guide gathers explanations and sources, but does not issue permission. Use this guide to understand provenance, not to decide an activity. Restrictions, health notices, access and signage are local and can change. Consult the competent authority and on-site information; Mareloa is not a navigation tool.
Reviewed source
This page cites and links to this public reference; it does not reproduce its tables.
Reviewed 2026-09-11.