On the east coast of St Maarten, Dawn Beach is considered the best snorkeling in St Maarten. While it can be a rough, challenging drive to Dawn Beach, the snorkeling off the reef beyond the main white sandy beach is known to be excellent, especially starting from the righthand side. Many snorkelers at Dawn Beach start from Scavengers Beach Bar (if it is still there). It is not recommended to head to the seaward side of the reef unless the surf is calm due to strong cross currents.
To reach the snorkeling on St Maarten by air, fly into Princess Juliana International Airport (SXM). Note, there is a $30USD departure tax collected at the airport.
In addition, there is a ferry called Great Bay Ferry that interconnects St. Martin with St Barts.
Overall, Dawn Beach is the 1st most popular snorkel dive spot of all 2 snorkeling dives in St Maarten.