WindWaterSail
WindWaterSail app icon
WindWaterSailTides, currents and wind · iPhone and Apple Watch

Tides, currents and wind on one chart.

See what the water and the wind are doing at the same time. Know if the ebb and the breeze line up before you load the car.

  • NOAA tides and currents with wind on the same time axis
  • Alerts when it's worth going out, graded for your gear
  • Every NOAA station in the US, plus 93 launch spots
Download on theApp StoreiPhone and Apple Watch · $9.99 once. No subscription.
WindWaterSail screenshot 1
01

One chart, one cursor

The tide or current curve with wind stacked right under it. Drag across and both move together.

WindWaterSail screenshot 2
02

Straight from NOAA

The same tide and current predictions NOAA publishes. Flood above the line, ebb below, arrows for which way the water sets.

WindWaterSail screenshot 3

And the rest

Worth going out?

It scores every half hour of the forecast for wind sports and tells you when it's good, and when it isn't. 13 knots on a foil is not 13 knots on a small kite.

Marine forecast up top

The National Weather Service coastal waters forecast for your zone, with small craft advisories first.

Daylight built in

Night is shaded and sunrise and sunset are marked, so you know if the window lands in daylight.

On your wrist

Apple Watch app and widgets, plus favourite spots with alerts.

Why I built it

Two apps was one too many.

I'd check the tide in one app and the wind in another and try to line them up in my head. Now it's one chart. Crissy Field is scored against local guidance, everywhere else uses general wind sport rules, and the app tells you which.

Nils

Questions

Where does the tide and current data come from?

NOAA CO-OPS predictions, the same ones NOAA publishes. Wind comes from Open-Meteo and the marine forecast from the National Weather Service.

Where does it work?

Anywhere NOAA publishes predictions: roughly 3,500 tide stations and 4,400 current stations across the United States.

Is it good for kitesurfing, wing foiling and sailing?

That's what it's built for. Windows are graded by the gear they suit, and you set the lightest wind you'll bother with.

Does it track me?

No. No account, no analytics, no ads. Your location is only used to show you on the map and is never sent anywhere.

Is it a safety tool?

No. It's a planning aid. Always check real conditions before you go out.

Predictions are astronomical only and don't account for wind, river runoff or pressure. Conditions scoring is a planning aid, not a safety call. Check conditions yourself before you launch. Data from NOAA CO-OPS, the National Weather Service and Open-Meteo. Not affiliated with NOAA.

NOAA tides and currents with wind on the same time axis.

Download on theApp StoreiPhone and Apple Watch · $9.99 once. No subscription.

Also by me

I also build apps for runners, cyclists, swimmers and triathletes at HeadwindLab.