North of Castries and Gros Islet in Rodney Bay, there are excellent snorkeling opportunities to see a wide range of marine life including Flounder, Blue Tang, Parrot Fish, Squirrel Fish, Spiny Lobster, Arrow Crabs, and Octopus. Some of the better snorkeling in northern St Lucia is off the northern shore of Rodney Bay just off The Landings.
To reach the snorkeling on St Lucia by air, you will need to fly into either George Charles Airport (SLU) on the north end or Hewanorra International Airport (UVF) on the south end of the island. Since the roads on St Lucia can be in poor condition or even washed out depending upon rainfall, you may want to select an airport close to the set of snorkeling dive destinations you prefer on St Lucia. A rental car is recommended to access the north end dive sites, while a rental is not recommended for the south end.
In addition, there is a ferry called L'Express de Iles that interconnects Dominica, Guadeloupe, Martinique and St Lucia.
Overall, Rodney Bay is the 2nd most popular snorkel dive spot of all 10 snorkeling dives in St Lucia.