Right on the border between the French and the Dutch side of the island lies Oyster Pond. It doesn't have a beach, but a picturesque harbor that protects sailboats and charters from the choppy Atlantic Ocean. It is a pretty marina with a few good and popular waterfront restaurant, for example Captain Oliver's.
Oyster Pond or Oyster Bay is a great location on the Atlantic side of St. Maarten and St. Martin. Captain Oliver´s by the waterfront of Oyster Pond Marina is the main place to go. Head for a casual lunch, the lobster buffet on some weekend nights, or a Sunday Brunch! Or take a 5 minutes ride (by car or on the water taxi) to get to next door Dawn Beach and relax on a casual beach! The marina is also the starting point for a ferry to St. Barth.
Oyster Bay or Oyster Pond is facing the Atlantic, it can be windy and a bit rougher at times, although the reef protects the area very well. It's a sailor's paradise and starting point for Caribbean sailing tours.
Behind and above the marina are a few small hotels and budget oriented rental properties converted from former hotels in this area. These apartments are very attractively priced.