As Cemaes bay is north facing, the prevailing south westerlies do not make big waves. If you want those, Rhosneigr on the West coast is great for windsurfing, about 25 minutes away by car.
Cemaes bay is ideal for swimming, sailing, sport boating, fishing, kayaking, with some amazing bays to visit. You have the choice of going east or west, depending on the wind and sea state. A perfect spot for boating and exploring. Parking outside Spindrift is limited to 2 cars, but a boat could just be parked there with one car, and there is further parking just outside the cul de sac.
Please see our notes on launching. There are 4 good launch spots, the nearest 100m away, and the furthest is Bull Bay, where you can launch an ocean liner. So, all boats can be launched.