Today’s curve, with a live now marker
The height of the water through the day, with highs, lows and where you are on it right now.
Features
One prediction, four ways to use it.
Wrackline starts from the same thing for everyone: the height of the water, minute by minute. What changes is the question you bring to it.
For sailors
Plan a passage around the tide
Find the window over a bar or a drying mooring, and see how the stream turns before you slip lines.
- Window finder for any drying height
- Hours of flood and ebb, marked on the curve
- Surge watch when a low is sitting on the coast
For anglers
Be on the mark for the flood
Alerts for the hours that fish, whether that is the first of the flood or slack high water.
- Alerts at any point in the tide
- Moon phase and springs or neaps at a glance
- Dawn and dusk overlaid on the curve
For surfers
Know when your break switches on
Save the height band your spot works in and see it shaded on the curve and on your lock screen.
- Height bands per saved spot
- Pushing or dropping, shown with the height
- Lock-screen widget for the next session
For walkers
Get back before the water does
For causeways, tidal islands and long beaches: a "turn back by" time that leaves a margin.
- Turn-back time with a safety margin
- Low-water walks planned days ahead
- Works on a cliff path with no signal
The full list
Everything in the app
Free covers today and tomorrow with no adverts. Pro adds the year ahead and the tools that act on it.
Times and heights, a year ahead
Every high and low water for 365 days, to the minute and the centimetre.
Works with no signal
Every prediction is computed on the phone. Nothing is downloaded while you are out.
Tide alerts
At any point in the tide: an hour before low, two hours into the flood, slack high water.
Window finder
Enter a drying height and a depth; see every window when the water clears it.
Surge watch
Reads the pressure and wind forecast and flags days the water will run 20 cm or more off.
Widgets
Current height, rising or falling, and the next turn on your home and lock screens.
Sun, moon, springs and neaps
Dawn and dusk shaded on the curve; every day labelled from neaps to springs.
Printable tables and calendar export
A clean monthly table for the chart table, or the tides in your calendar.