Sweden · coast guide
Understanding the coast of Sweden
This guide explains the coast of Sweden on the Baltic Sea, the North Sea; calculations, observations and product limits remain distinct.
Read a local tide
Times and heights depend on the port, datum and station timezone. Sweden’s coast includes both the Baltic and Skagerrak/Kattegat, where water-level patterns differ. SMHI publishes observations in RH 2000; the reference system, station and time must stay with the datum. A west-coast observation does not automatically describe a Baltic place. 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
Along Sweden’s coast, wind-driven water-level variation can matter alongside the astronomical component. Form, archipelago and open sea give different local responses. Do not use a national number to decide whether a particular beach, jetty or path is accessible. 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 Sweden and infers no access from one number.
Prediction, model and observation
An observation is a measured water level in a stated system, not a future prediction. Models and forecasts have their own assumptions and times. Compare only products with clear station, date and timestamp; absent data remains unknown information. 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 water, reserves, fishing and local access rules must be checked with the responsible authority and on site. Coastal signs can change independently of water level. The guide explains data origin and does not replace a local decision before an activity. 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.