Kitesurfing wind forecast — what to check before you rig.
A weather app tells you wind is coming. A kitesurf forecast needs to tell you whether you can actually fly — and that's a different, harder problem. Here are the six signals that separate a useful forecast from a generic number.
Six signals every kitesurf forecast needs to show.
Weather apps are built for people checking whether to bring an umbrella. For kitesurfing, the bar is higher — and these are the six points where the difference shows up.
Average speed and gusts separately
A steady 18-knot average can hide 28-knot gusts and 10-knot lulls — making a session unpredictable or outright dangerous. The forecast that matters shows both numbers, not just the middle one.
Direction cross-referenced with your spot's window
The same 20-knot wind can be perfect (side-onshore) or unrideable (closed onshore) depending on the azimuth. Always confirm whether the forecast direction fits the real wind window at the specific spot you're heading to.
Hourly window — when it starts, when it drops
In Ceará, the thermal builds from around 10am–12pm and drops after 5–6pm. A forecast that only shows daily averages won't tell you whether you can launch at 9am or whether it's already over by 4pm.
Three-day trend
Is today weak and tomorrow stronger — or the reverse? The trend matters almost as much as today's number. If you're planning a trip or a long downwind run, the trend is what determines the right day.
Per-spot data, not regional averages
Wind can be clean in Cumbuco and gusty, shadowed, or offshore two kilometres away. A regional forecast erases that difference. What matters is the reading at the specific beach you're launching from.
A clear 'don't go' signal — not just 'go'
A good kitesurf forecast needs to say when NOT to go with the same clarity as when to go. Offshore rip, unexpected land breeze, or a window too short for the route you're planning — generic weather apps simply don't flag these.
GFS, ECMWF and why the regional model matters.
Every wind forecast starts with a numerical model. The two most widely used are GFS (American, updates every 6 hours, free) and ECMWF (European, generally considered more accurate at 4–7 days, partly paid). Apps like Windy or Windguru display these models with a visualisation layer on top — the underlying data is the same.
The problem: these models operate on 9–25 km grids. A kitesurf spot is under 1 km wide. The gap between the regional forecast and what you actually feel at the bar is real — especially at spots with obstacles like hills, reefs, or irregular coastlines that create channelling or wind-shadow effects.
What closes that gap is live spot data: local weather stations, sensor readings, and the real-time signal AYON Wind uses to correct the model with what's actually happening right now at the spot you chose.
Reading the wind on the Ceará coast.
Ceará has one of the most reliable wind forecasts in the world for kitesurfing — which is both a gift and a trap. The South Atlantic trade wind arrives E/ESE throughout the season (August–December) with impressive consistency: what the wind did yesterday is a solid first guess for today. That high predictability tends to breed complacency.
What models tend to get right: average speed, direction, and the rough arrival and departure of the daily window. What models underestimate in Ceará: the localised thermal effect (which can add 5–8 knots in Cumbuco while Fortaleza has half that), and lestada days — when the wind shifts from ESE to E or ENE and completely reorganises the window at every spot.
In practice: use the model to decide whether the season is firing and to plan your trip. Use the live signal to confirm tomorrow's session and choose the day's spot.
Kitesurfing wind forecast questions.
What is the best wind forecast app for kitesurfing?
AYON Wind was built specifically for the Brazilian coast — with live conditions, a 7-day forecast per spot, gust readings, and a daily thermal window. Generic weather apps (Windy, Weather.com) show regional models but don't cross-reference direction with each spot's window or identify the best launch window.
How accurate is a 3-day wind forecast for kitesurfing?
Generally accurate, especially in trade-wind regions like Ceará. The GFS and ECMWF models perform well on trend accuracy up to 5 days at these latitudes. For 6–7 day forecasts, uncertainty grows — use them for trip planning, not to confirm tomorrow's session.
How do I know if it will be windy in Cumbuco today?
The Cumbuco pattern in season (August–December) is nearly mechanical: the E/ESE trades arrive and are reinforced by a thermal that builds from around 10–11am and typically stabilises at 18–25 knots through the afternoon. The best confirmation is AYON Wind's live reading at the Cumbuco spot — showing what's happening now, not the day's average.
What is thermal wind in kitesurfing?
Thermal wind is generated by the temperature difference between land (which heats quickly under the sun) and sea (which stays cooler). That difference creates convection: warm air over land rises, and cooler air from the sea rushes in to fill the gap — adding on-shore wind that stacks on top of the trade wind. In Ceará, the thermal is responsible for the mid-morning wind peak that kiters time their sessions around.
How much wind do I need to go kitesurfing?
It depends on kite size and rider weight, but as a general reference: 12–15 knots for 14–17 m² kites, 16–22 knots for 10–12 m² kites, and above 22 knots typically calls for 7–9 m² kites. For exact recommendations based on your weight and forecast speed, use AYON Wind's kite-size calculator.
Take AYON Wind with you.
Live wind, gusts, and direction for every spot in this guide — plus route intelligence for the downwinders. Built by riders who call this coast home.