What it means
A gust is a short, sharp increase in wind speed above the average. Gustiness, the spread between lulls and gusts, matters more for a kitesurf session than the average wind number itself. A steady 18 knots is a joy; 18 knots gusting 30 is a workout in kite control and judgment.
Gusts come from turbulence. Land heats unevenly and boils the air, obstacles like buildings, cliffs and tree lines shred the flow, and frontal weather stacks bands of pressure. That is why forecast tools show two numbers, average and gust, and why experienced riders read the spread first: a gap larger than ten knots signals hard work, and a gap of fifteen or more is a warning. Onshore thermal winds tend to blow cleaner than pre-frontal winds at the same average.
Riding in gusts is a skill of anticipation. Watching the water upwind shows a gust arriving as a dark ripple band seconds before it hits. Edging harder and sheeting out slightly as it arrives converts the surge into upwind ground instead of a downwind stumble. Kite choice matters too: a size smaller with more depower beats a bigger kite ridden on the edge of control every time the wind turns patchy.
Example on the water
He saw the dark patch racing across the water upwind, sheeted out a touch, and let the 28-knot gust drive him two hundred meters upwind instead of ripping him off his edge.
Common mistakes
- ·Choosing kite size for the average and ignoring a 12-knot gust spread.
- ·Pulling the bar in when a gust hits, which powers the kite exactly when it shouldn't.
- ·Jumping in heavy gusts without the margin for a surging kite mid-air.
- ·Ignoring the terrain upwind that causes the turbulence in the first place.
Why it matters
Gusts affect kite size choice and safety.
Frequently asked questions
How much gust difference is too much?+
A spread up to about 8 knots is normal; 10 to 15 demands active riding and conservative kite choice; beyond that, many experienced riders simply wait, because control margins shrink faster than the fun grows.