Global tide model
Global tide predictions use harmonic constants from EOT20 (Hart-Davis et al. 2021, https://doi.org/10.17882/79489) and, at estuary ports, TICON-4 (Hart-Davis et al. 2025, https://doi.org/10.17882/109129) — both CC BY 4.0 — derived from GESLA-4 tide-gauge records. Records from SMHI, DMI, the Finnish Meteorological Institute, and Kartverket / the Norwegian Hydrographic Service are used under CC BY 4.0. Records are also provided by Fisheries and Oceans Canada, Rijkswaterstaat, and Germany's WSV / PEGELONLINE and Bundesanstalt für Gewässerkunde (BfG). Contains information licensed under the Open Government Licence – Canada (https://open.canada.ca/en/open-government-licence-canada). Data has been modified (harmonic analysis).
United Kingdom — UKHO ADMIRALTY
Contains ADMIRALTY ® data: © Crown copyright and database right.
Australia — Bureau of Meteorology
Some tide data in this app is sourced from the Bureau of Meteorology.
Weather — Apple Weather
Weather data provided by Apple Weather.
Weather — Open-Meteo
Weather data by Open-Meteo.com, licensed under CC BY 4.0.
This does not imply endorsement by any of the providers.
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