Three trim mistakes I see again and again — and the simple fixes. Get these right and the same gear suddenly feels faster and easier.
Windsurfing is simple and beautiful — but the technique and equipment can get complex. With so many factors in play, there are a few mistakes I see happen very often. Here are the three big ones, and how to fix them.
Step by step
- 1
Too little downhaul
Downhaul controls how much the mast bends, how loose the top of the sail goes, and therefore how much the sail twists. With too little, the loose leech (the back edge up top) won't open: the sail powers up but won't accelerate, you feel resistance at a certain speed, and the nose gets pushed down onto the water. Fix: add tension until the loose leech reaches the indicator (if your sail has one), increasing in 0.5–1 cm steps until you find the sweet spot.
- 2
Too much outhaul
Crank the outhaul too far and you lose the sail's shape completely — and shape is what makes a sail stable and easy. Too flat and it stays lifeless under pressure, the difference between lulls and gusts feels huge, and planing gets hard. Fix: a good rule of thumb is that when you sheet in, the sail should just touch the boom.
- 3
The wrong mast
It's widely underestimated how much the right or wrong mast changes a sail. Fix: use a mast that was designed for your sail — the safest option is the same brand as the sail. You're better off with a perfectly matching 70% carbon mast than a 100% carbon mast with the wrong bend curve.
Common mistakes
- Loose leech won't open, resistance at a certain speed, the sail powers up but won't accelerate → too little downhaul.
- Big pressure swings between lulls and gusts, little backhand pressure, nose lifts in gusts → too much downhaul.
- Sail stays flat under pressure and it's hard to get planing → too much outhaul.
- Resistance at speed and you can't close the sail → too little outhaul.
Trim in small steps — half a centimetre at a time — and feel the difference on the water before you change anything else.
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