Tides: Tide Chart & Forecast

Tides shows the water level at a tide station as a chart you can scroll into the past and the future, with "now" marked, the next high and low, sunrise, sunset and the moon phase. Pick the station nearest to you, search by name, or find one on the map.

The chart
• Drag sideways through time, pinch to show anything from 12 hours to 7 days.
• A line marks now with the current level; tap anywhere for the expected time and level at that instant.
• Highs and lows are labelled on the curve, daylight is shaded between sunrise and sunset.
• Every time is the station's local time, so the chart reads like the official tables wherever you are.

Now
• The current level, whether the tide is rising or falling, and the next high and low.
• Sunrise, sunset and the moon phase for the day you are looking at.

Stations
• About 5,000 stations worldwide: every NOAA tide-prediction station in the United States plus the tide gauges of the IOC Sea Level Station Monitoring Facility elsewhere.
• Opens on the station nearest to you (with your permission) or the one you chose last time.
• Search by town, state, country or id, nearest first once your position is known, or tap a station on the map.

Where the predictions come from
• United States: NOAA CO-OPS, the official predictions, in metres or feet above MLLW, the chart datum.
• Everywhere else: the Open-Meteo global tide model at the gauge's position, hourly, from 1940 to about two weeks ahead, above mean sea level. A model is not a harmonic prediction for that exact gauge, so treat its times and heights as approximate. The app says which source each station uses.

Settings
• Metres or feet, 12- or 24-hour clock; each follows your device until you change it.

Privacy
• No accounts, no ads, no analytics. Your position is used on the phone to pick the nearest station and is never sent anywhere. The app contacts NOAA, Open-Meteo and OpenStreetMap only to fetch predictions and map tiles.

Permissions
• Location: to pick the nearest station. The app works without it.
• Internet: predictions and map tiles.

Not for navigation. Always check official tide tables and local notices before going on the water.

Maps © OpenStreetMap contributors. Sea level data by Open-Meteo.com (CC BY 4.0). US predictions by NOAA.

Recent changes:
First release: a tide chart you can scroll through time, with now, the next high and low, sunrise, sunset and the moon phase; about 7,000 stations worldwide to search or pick on a map; metres or feet.