I have photographed some remote corners of the national park system, but paddling a kayak across open Caribbean water to reach a tiny uninhabited island ringed by reef was a first for me. Whistling Cay, a small rocky island off the north shore of St. John in Virgin Islands National Park, is a place most visitors never see.
That is a shame, because the snorkeling around the cay is some of the best in the park. Healthy coral, nurse sharks cruising the shallows, green sea turtles, spotted eagle rays, and fish in colors I did not know existed, all reachable by a short kayak paddle from Maho Bay. Here is what I know, based on two trips and one very sunburned set of shoulders.
What Whistling Cay Is
Whistling Cay is a small, uninhabited island sitting roughly a quarter mile off the north coast of St. John, between the island and the British Virgin Islands. It is a few acres of rocky ground topped with scrubby vegetation and the stone ruins of an old Danish customs house, which once helped colonial authorities watch the channel for smuggling between the islands. There is no dock, no facilities, and no real shade.
The appeal is not the island itself. It is what lies under the water around it. The cay sits in a reef system that supports a remarkable range of marine life. On my first visit I counted at least four green sea turtles, two nurse sharks, and more species of fish than I could name. Visibility ran past 40 feet, which made the whole thing feel like floating inside an aquarium.
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Getting to St. John, Then to the Cay
St. John is reached by ferry from St. Thomas. Fly into Cyril E. King Airport (STT), take the Red Hook to Cruz Bay passenger ferry, which runs about hourly and costs roughly $13 per adult each way as of 2026, then drive about 20 minutes to Maho Bay on the north shore.
From there, Whistling Cay can only be reached by water. There is no bridge, no ferry, and no trail. The two practical options are a kayak from Maho or a boat charter.
Kayaking from Maho Bay
An outfitter called Reef2Peak rents kayaks, paddleboards, snorkel gear, and beach chairs directly on Maho Bay beach. They take cash and card, and the process is simple: show up, grab a kayak, and paddle. Rentals typically run from mid-morning through late afternoon, so plan to go as early as they open.
The paddle from Maho to Whistling Cay is about a quarter mile and takes roughly 15 to 20 minutes in calm conditions. Much of the water between the beach and the cay is shallow enough to see the bottom the whole way, and I watched turtles and rays pass beneath my kayak on the crossing.
By Boat Charter
Several charter operators on St. John include Whistling Cay as a snorkel stop. This is the easier route if you would rather not paddle, though it costs more. The upside is that a captain knows exactly where the best snorkeling around the cay is.
Snorkeling, and the Currents to Watch
The reef around Whistling Cay is healthier and more diverse than most snorkel spots on St. John. Here is the safety distinction that matters: the south side of the cay, facing Maho Bay, tends to have calmer water and is the better choice for less experienced snorkelers. The north side has more dramatic terrain but stronger currents and more exposure to open water. If you are not a strong, confident swimmer, stay on the south side.
Across two visits I saw green sea turtles, nurse sharks (harmless, in case that word made your stomach drop), spotted eagle rays, barracuda, blue tangs, parrotfish, and several species I had to look up later. The coral includes brain coral, elkhorn, and sea fans swaying in the current. As always, green sea turtles are protected under the Endangered Species Act, so keep your distance and never touch them.
Best Time to Visit, and the Paddle Back
The trade winds in the Virgin Islands usually pick up around midday, and they can make the paddle back to Maho much harder in the afternoon. I have lived this. Fighting a headwind in a kayak after two hours of snorkeling is no fun. Go as early in the day as the outfitter allows. The earlier you are on the water, the calmer the crossing, the better the visibility, and the fewer people you will share the cay with. On my February trip I had the place to myself for over an hour.
If you are not a strong paddler, go with a partner in a tandem kayak, keep an eye on the wind, and do not linger so long that you have to fight whitecaps on the way home.
Know Before You Go
- Getting there: Ferry from St. Thomas (Red Hook to Cruz Bay, about $13 per adult each way in 2026), drive to Maho Bay, then kayak or charter.
- Crossing: About a quarter mile from Maho, roughly 15 to 20 minutes by kayak in calm water.
- Currents: South side calmer, north side stronger. Stay south if you are unsure.
- Timing: Go early. Trade winds and afternoon chop make the return paddle harder.
- Fees: No general park entrance fee. You pay only for kayak or charter rental.
- Facilities: None on the cay. Bring water, sun protection, and your own snorkel gear.
- Time needed: Half a day for the paddle, snorkel, and return.
Plan the Rest of Your St. John Trip
Whistling Cay pairs naturally with Maho Bay, where you launch, and with the other north shore snorkels like Waterlemon Cay. For the full park, with maps and history, start at our Virgin Islands National Park guide, then browse things to do in the park.
