Pre-race planner
Enter the forecast for race start. The planner finds past race-season days at Newport that started the same way and shows what the wind actually did next.
How the wind moved on similar days
Degrees from the start direction at Newport harbor. Above zero means the wind went right (veered); below zero means it went left (backed). Bands show the middle 50% and 80% of days. Tap a day in the table to overlay it.
Wind speed on similar days
Station wind over the race
Drag to move through the race. The big arrows are the 4 stations; the moving dashes estimate the wind over the water. They drift the way the wind blows, faster where it is stronger, and are blue where you would be lifted and red where you would be headed on the tack chosen on the map.
Matching days
| Date | Start | Shift at end | Osc ± | Speed end |
|---|
Typical day by hour
Median wind at Newport harbor for the chosen month, all days with at least 3 knots.
Coach debrief
Upload a GPX track from any GPS watch or phone app. The wind is worked out from the boat's tacking headings, every upwind moment is colored lifted or headed, and each tack is checked against the shifts.
Tracks are analyzed in your browser and are not uploaded anywhere. Your tracks are kept on this device only.
Tracks
Wind direction during the race
Worked out from the GPS track (upwind legs only), compared with the NOAA station at Newport harbor when that day is in the dataset.
GPS records course over ground, not compass heading, so tidal current and leeway mix into the inferred wind. Steering changes also show up as small shifts. Read the pattern, not single readings.
East and Gulf Coast wind
Wind from Maine around Florida to Texas: the typical pattern for any month and hour from NOAA stations (2019 to 2024), how each spot bends a breeze from any direction, and the live readings, forecast, tides and currents for the coming week.
Drag the dial or the slider. The map shows how each spot usually bends and slows a breeze from that direction, measured at 129 NOAA stations in racing-season daytime hours. Blue is lifted and red is headed compared with the direction you set.
Tide and current
NOAA predictions for the tide and current stations nearest the map center. Curves are drawn smoothly between the predicted highs, lows, slack and maximum-current times, so values between them are approximate.
Jump to a venue
Stations near the map center
Typical wind at this month and hour. Steadiness shows how often the wind really comes from that direction: near 100% it almost always does; below about 50% it varies a lot from day to day.
| Station | Away | From | Speed | Steadiness |
|---|
- "Typical" means the average for that month and hour over six years. On any single day the wind can be very different, so use this for planning, not as a forecast.
- Blue and red compare each spot with the regional wind within about 40 km, on the tack chosen on the map. They show where the wind usually bends, not where it will bend on race day.
- Between stations the wind is estimated, and stations can be 20 to 100 miles apart. Detail is best where stations are dense, such as Chesapeake Bay, Long Island Sound and Narragansett Bay.
How accurate is the AI?
The shift forecaster was tested on a full season it never saw during training, and compared with simple rules of thumb.