St. John's underwater world is as stunning as its hiking trails. The island is home to the only underwater snorkeling trail in the US National Park system, and its protected bays teem with hawksbill turtles, spotted eagle rays, and vibrant coral. This 3-day itinerary covers the very best spots — including a few the guidebooks miss.
Your 3-Day Sample Itinerary
Trunk Bay Underwater Snorkel Trail
Trunk Bay is one of the world's top-rated beaches for good reason. The 225-yard underwater trail has informational plaques on the ocean floor guiding you through the reef ecosystem. Arrive early to beat the crowds and enjoy the clearest water.
Maho Bay & Sea Turtles
Maho Bay is famous for its resident sea turtles — you can often see them grazing on seagrass just yards from shore. The water is calm, shallow, and perfect for beginners. Pair it with nearby Francis Bay for a quieter afternoon snorkel.
Waterlemon Cay & Leinster Bay
Hike the short trail to Leinster Bay and swim out to Waterlemon Cay — a tiny islet surrounded by some of St. John's healthiest coral. Expect to see spotted eagle rays, octopus, and Caribbean reef sharks in the deeper water.
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Get Your Complete St. John Itinerary
This is just a taste. My Island Compass builds a full, personalized day-by-day itinerary based on your travel style, your group, and your pace — designed by a Caribbean family that lives here.
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