The offshore reef and Trade Winds along the eastern sweep of the bay make for choppy surf great for windsurfing, especially after midday (mornings are calmer and better for beginners and kids). Carib Wind is the most respected windsurfing center here, offering all-inclusive, multiday instructional packages (starting at $60 per day, including equipment) and top-of-the line rental boards. (You can even hire out Bic Formula Racing rigs, provided you know how to handle them.)
Just north of Cabarete is Sosua Bay, a spectacular diving and snorkeling site where octopuses, lion fish, and even whale sharks are often seen. Advanced divers shouldn’t miss the Airport Wall an underwater cliff pocked with explorable tunnels. Northern Coast Aqua Sports runs daily trips to the wall from their dive center in Sosua Village ($40 gets you a 45-minute dive, plus all equipment). Beginner dives on shallower reefs are also available.