Durban — Vaal Dam
South Africa · Gauteng, South Africa
Scored across the racing day
Right now
Club Dinghy
Good conditions for a sail
High Performance
Good conditions for a sail
Club Dinghy breakdown
High Performance breakdown
Recent form
Last 20 days of logged conditions.
About Durban — Vaal Dam
Largest inland sailing venue in South Africa with strong afternoon thermals.
Frequently asked questions
How often is this page updated?
Current conditions refresh every 3 hours when the conditions cron runs. Sub-scores are recalculated from the latest hourly data each time you load the page.
What is the difference between Club and HP scores?
Club Dinghy scoring is optimised for boats like the Laser, RS200, and Wayfarer that peak at 12-14 knots. High Performance scoring suits boats like the 49er, Moth, and RS800 that want 18-20 knots and tolerate stronger winds.
What does the best window mean?
The algorithm slides a 4-hour window through daylight hours and picks the window with the highest composite score. This is the best 4-hour block for getting on the water today.
Why is my score suppressed to zero?
Safety. Persistent thunderstorms, sustained winds above 40 knots, gusts above 50 knots, or visibility below 500m all trigger automatic suppression. The reason is shown on the page.
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 and estuary venues.
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