No data available yet. The leaderboard refreshes every 6 hours.
Click a row to see the full score breakdown. Weather data from Open-Meteo, refreshed every 6 hours.
How the score works
Every venue gets a composite score out of 10 from 9 weighted sub-factors. The algorithm slides a 4-hour window through daylight hours and picks the best window. Toggle between Club Dinghy and High Performance to see how the wind quality curve shifts.
Matches wind speed to the ideal range for each boat category. Club dinghies peak at 12-14 knots; high performance boats peak at 18-20 knots.
Penalises gusty conditions. A gust ratio above 1.5x sustained wind scores poorly. Amplified penalty at higher wind speeds.
Wave height curve centred on 0.2-0.3m. Steep swell and wind-against-tide both penalise. Inland venues score near-perfect by default.
Apparent temperature comfort. Cold rain and spray at high wind speeds both add compounding penalties.
Rain rate curve. Thunderstorms suppress the score to near zero as sailing must stop.
CAPE and lifted index thresholds. Any active thunderstorm forces the score to zero for safety.
Circular standard deviation of wind direction. Shifty winds penalised, with offshore exposure amplifying the effect.
Linear from 0 to 10km. Fog conditions cap the score at 25. Below 500m across the window triggers suppression.
Barometric pressure change per hour. Rising or stable pressure scores well; rapid drops signal deteriorating conditions.
Frequently asked questions
How often is this updated?
Every 6 hours when the conditions cron runs. We pull fresh wind, wave, and weather data for every venue and recalculate both boat category scores.
What is the difference between Club Dinghy and High Performance?
Club Dinghy scoring is optimised for boats like the Laser, RS200, and Wayfarer. These peak at 12-14 knots and are penalised more heavily by strong gusts. High Performance scoring suits boats like the 49er, Moth, and RS800. These want 18-20 knots and tolerate a wider wind range.
How is the score calculated?
Each venue gets a composite score out of 10 from 9 weighted sub-factors. The algorithm slides a 4-hour window through daylight hours and picks the best window. Expand any row to see the score breakdown.
What does Becalmed mean?
Becalmed is the lowest label, meaning conditions are too light or too unfavourable for a good day on the water. It typically means wind is well below the ideal range.
Why are some scores suppressed to zero?
Safety. Persistent thunderstorms, sustained winds above 40 knots, gusts above 50 knots, or visibility below 500m all trigger automatic suppression. The suppression reason is shown on the row.
How are inland and coastal venues compared?
Inland venues skip the sea state sub-factor and score near-perfect there. Coastal venues face wave penalties, swell steepness checks, and wind-against-tide effects. The leaderboard is intentionally global, so both types compete on the same scale.
Where does the data come from?
Open-Meteo Weather API for wind, temperature, pressure, and visibility. Open-Meteo Marine API for wave and swell data at coastal venues. The same underlying models power many sailing forecast apps.
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