Wingfoil / Sailing · GPS Upwind Analysis
Find out how high you really point.
Upload a GPX track and Foil Lab estimates the wind from weather and how you actually sailed, then shows your real upwind angle, VMG, and best legs. Compare it across gear and sessions.
No account needed. Nothing is stored unless you choose to share.
How it works
01
Upload a GPX
Drag in a track from Strava, your watch, or any GPS logger. We read it right in your browser.
02
We solve the wind
We seed from historical weather, then refine the estimate when your tacks give balanced evidence. No hand-entered guess required.
03
You judge & compare
Drop noisy legs, read your true upwind angle and VMG, and overlay sessions to see what actually points higher. We show the data; the call is yours.
What makes it different
Wind estimate, not a hand-entered guess.
The wind is solved from your own tacks (seeded by real weather), so your angles are measured against the best wind estimate we can defend, with confidence shown, not a round number you typed.
Comparable across sessions.
Same method every time, so two sessions on different days are honestly comparable. That’s the whole point.
You curate, we don't fudge.
Exclude noisy legs yourself. We never silently normalize or hand you a verdict.