Stability, because few paddlers want to end up capsized, is very important when choosing a kayak. But stability is a complex issue—not only does it keep you upright, it's connected to virtually every performance element. Stability is really an issue of volume, which creates buoyancy, and where that buoyancy lies in the hull.

Not every kayak that feels stable is stable. And not every kayak that feels tippy will leave you overturned. Stability is divided into two types: initial and secondary. Initial stability is what you feel when you first sit in a kayak on flat water. A kayak with a good initial platform feels solid. But you can't always rest easy in a kayak with high initial stability—that very same kayak, when introduced to surf or chop, can become a different craft. When that boat leans over, you'll find the stability is not where you need it, thus limiting you to calm water conditions.

Kayaks gain stability through hull shape—primarily through beam (width) and flare. Flare describes the angle of the hull outward from the bottom of the kayak to the deck. Pronounced flare increases secondary stability. This secondary stability is vital when you're faced with rough water or when you lean in to a turn. Lean turns are an efficient way to maneuver your kayak. If your kayak is long, it will likely track well, but it will lose maneuverability. By lean turning a kayak, you reduce the waterline length presented to the water and turn quicker. This is why secondary stability is so important—it helps you stay upright while you orient in a way that makes the kayak move the way you need it.