Sea Current Measure Tool

Measure current speed and direction from your iPhone, map readings across the race area, and share measurements with your sailing team.

Measure sea-current speed and direction from your iPhone in minutes—built for sailors, coaches, and race teams. Map readings across the race area, review history, export CSV data, and share measurements with your team for smarter tactical decisions.

WHY TIDEMEASURE Even a small current can change boat speed, laylines, mark roundings, and the favored side of the course. TideMeasure turns a simple drift test into a clear speed-and-direction result without specialized hardware.

HOW IT WORKS

1. Drop a floating stick or small object into the water.
2. Tap Start as it begins to drift.
3. Retrieve it after a short measurement.
4. Tap Stop to see current speed and direction.

FEATURES • Measure current speed and direction using GPS • View results in m/min, m/s, cm/s, or knots • Map measurements across the race area • Review saved measurements and history • Create or join a team and share readings • Select and export measurements as CSV • Continue measuring offline

TideMeasure is designed for race preparation, coaching, training sessions, and building a clearer picture of current around the course.

Location access is required during measurements and for displaying results on the map. Apple Maps data is used for mapping.