High and low tides from official sources for the nearest station, in 12 countries and territories. Download once, then it works offline. Find the nearest tide station with GPS, confirm it, and your watch downloads the rest of the year's high and low tides through your phone. After that it works without your phone, wherever you are. Near the end of the year, open the app with your phone nearby and it fetches the next year by itself. - Today's tide curve with the estimated height right now - Times and heights of the high and low tides, today and the next four days - Clear feedback while searching for GPS and downloading - Pick a station from a list when there is no GPS signal - Meters or feet and 12 or 24-hour time, following your watch settings Coverage: over 4,000 stations in 12 countries and territories, from official sources: - United States and territories: 3,250+ stations, NOAA - Japan: 239 stations, source: Japan Meteorological Agency website; data edited by this app - Denmark, Greenland and Faroe Islands: 145 stations (69 in Denmark, 66 in Greenland, 10 in the Faroe Islands), Danish Meteorological Institute (DMI), CC BY 4.0, adapted - Germany: 139 stations, Datenquelle: Gezeitenvorausberechnungen ©, Bundesamt für Seeschifffahrt und Hydrographie, Hamburg, 2026/2027 - New Zealand: 85 ports, Toitū Te Whenua Land Information New Zealand (LINZ), CC BY 4.0, adapted - Netherlands: 75 stations, Rijkswaterstaat - Brazil: 53 ports, Brazilian Navy (CHM) - Ireland: 38 stations, Marine Institute, CC BY 4.0, adapted - Norway: 33 stations, ©Kartverket (Norwegian Mapping Authority, Hydrographic Service), CC BY 4.0 - Hong Kong: 12 stations, Hong Kong Observatory, HKSAR Government, via DATA.GOV.HK Other countries, including the UK, Canada and Australia, are not covered yet. Near a coast outside this list, the app says there is no station nearby. Requires the Garmin Connect app on a paired phone with internet for the download. No account, no ads, no tracking. Your GPS position stays on the watch; only the chosen station's file is requested. Not for navigation or safety decisions. Predictions are astronomical and do not include wind, pressure, storm surge, waves or currents. Sources and licenses: https://mares-data.pages.dev/ Privacy: https://mares-data.pages.dev/privacy Support: use Contact Developer on this page.

More stations in Denmark, Greenland and the Faroe Islands, now over 4,000 in total. Tide heights show the unit, and times always have two digits. How it works and Sources & license are shorter and scroll a full page at a time.