"What kite size do I need?" is the question heard on the beach more than any other – and usually the answer is a number that's completely wrong for the person asking. Because the right kite size doesn't hang on a single chart but on three things at once: how much wind is blowing, how much you weigh and what you actually want to do. Here's the logic behind it, no secret science.
The three variables
1. Wind. The more wind, the smaller the kite. Sounds obvious, but it's the biggest lever. When the power roughly doubles, drop one or two sizes.
2. Body weight. A 60 kg rider and a 95 kg rider need different kites in the same wind – roughly one size per about 15 kg of difference. Most charts are calculated for 75 to 80 kg; if you're well above or below, adjust accordingly.
3. Discipline and board. A big light-wind twintip or a foil gets going in far less wind than a small wave board. Foilers often ride sizes where others are still standing on the beach.
Rule of thumb: wind and weight
As rough guidance for a rider around 75 to 80 kg on a twintip:
| Wind | Kite size (approx.) |
|---|---|
| 12–16 knots (light wind) | 12–14 m² |
| 16–22 knots (comfort zone) | 9–12 m² |
| 22–28 knots (strong) | 7–9 m² |
| 28+ knots (heavy wind) | 5–7 m² |
If you're closer to 60 kg, lean one size smaller; at 95 kg, one size larger. This table won't replace a feel for the day – but it puts you in the right corner.
Why one kite is never enough
The most common beginner mistake is buying a single big kite and hoping it "always works". It doesn't. A 12 m has you set at 14 knots and hopelessly overpowered at 25 – that's no longer fun, that's just hanging on. Most people get surprisingly far with two kites, say 9 and 12 m². That covers the lion's share of rideable days. A third, smaller kite (7 m) joins later if you're serious or often ride strong-wind spots like Tarifa in the Levante.
Typical mistakes
Buying too big because the shop said "then you can also ride in light wind" – and then never getting out when it really blows. Misreading the forecast and planning off the gust instead of the mean. Or copying the kite size of friends who are 20 kg lighter. Understanding wind comes before choosing a kite – how to read mean, gusts and thermals is covered in our forecast guide.
Flat water, wave, foil – small differences
In a flat-water standing area like Sotavento you can ride the upper end of the size range, because you can put your feet down any time. In waves you'll go smaller and more manoeuvrable. And for foiling it's a different logic altogether – every knot counts and small kites carry surprisingly far. In the end the best kite size is the one you ride relaxed on, with headroom to spare, rather than clinging on at the limit.
Frequently asked questions about kite size
What kite size for 20 knots?
For around 75 to 80 kg, 20 knots usually suits a 9 to 10 m on a twintip. Lighter riders go smaller, heavier riders larger.
Which kite is good for beginners?
A medium all-round kite matched to your spot's typical wind – at European learning spots often a 12 m. More important than size is a forgiving, modern kite profile and a school to brief you.
How many kites do you need?
Two cover most days (e.g. 9 and 12 m²). A third, smaller kite is worth it for strong wind or frequent trips to gusty spots.
What kite size for 80 kg?
80 kg sits right in the range of the common charts: roughly 12–14 m² in light wind, 9–12 m² in the comfort zone, 7–9 m² in strong wind.