If you only have one full day on the water in Tampa Bay, this is the day to spend it on. Egmont Key and Shell Key sit just a few miles apart near the mouth of the bay — one an abandoned island fort with snorkeling over submerged ruins, the other an untouched barrier-island sandbar with the best shelling on this stretch of coast. Neither is reachable by car. Here's the exact itinerary our captains run.
10:00 AM — Depart St. Petersburg
Board at our private marina, stow the coolers, and settle onto the flybridge for the cruise south. The run down to the mouth of the bay takes you past Pass-a-Grille and under the shadow of the Sunshine Skyway Bridge — keep phones ready, because the bridge from water level is a photo you can't get anywhere else. Dolphins routinely ride the wake on this leg.
11:00 AM — Egmont Key
Egmont Key is the kind of place that doesn't feel like Florida in 2026. The island guards the entrance to Tampa Bay and holds the ruins of Fort Dade, built during the Spanish-American War and now half-swallowed by dunes and sea grape. Walk the old brick roads, climb around the gun batteries, and visit the still-operating 1858 lighthouse. Then grab masks: on the island's southwest side, part of the fort sits submerged in 3–8 feet of clear Gulf water, making it one of the most unusual snorkeling spots in the region. Your captain anchors close and runs you in.
1:00 PM — Lunch Aboard
Back on the yacht, lunch happens the BYOB way — whatever your group packed into the galley, eaten on the shaded aft deck while the captain repositions north toward Shell Key. It's a 30–40 minute cruise; most guests use it for a flybridge nap in the sun.
2:00 PM — Shell Key
Shell Key is 1,800 acres of protected, undeveloped barrier island — no docks, no buildings, no ferry crowds, just a long white sandbar sliding into water the color of a swimming pool. The shelling here is legitimately the best in the area (go at lower tide for the freshest finds), the shallows stay warm and calm for hours of swimming, and dolphins work the channel edges constantly. This is the anchor-down, drinks-cold, nowhere-to-be part of the day.
5:00 PM — The Golden Ride Home
The return leg is timed on purpose: as you cruise back up toward St. Pete, the sun starts dropping toward the Gulf behind you. On a 5pm–6pm return you get the whole bay lit up gold. Extend to a full sunset finish if you booked the hours for it — check our sunset spots guide for why the stretch off Pass-a-Grille is the finale we recommend.
Timing the Trip: Tides and Weekdays
Two scheduling moves make this itinerary noticeably better. First, tides: the shelling at Shell Key peaks at lower tide, when the freshest shells sit exposed on the bar, and mornings usually pair the lower water with the calmest conditions. Your captain times the stop around the tide chart, so if shelling is the priority for your group, say so when you book and we'll shape the day around it. Second, weekdays: the same trip runs $500 per hour Monday through Thursday instead of $600 on weekends, and the anchorages are far quieter. A Saturday at Shell Key means sharing the sandbar; a Tuesday can mean having a stretch of it to yourselves.
Why the Yacht Beats the Ferry
You can reach Egmont Key on the ferry from Fort De Soto, and plenty of people do. The difference is everything around the island time. The ferry runs on its schedule; the yacht runs on yours, so you stay an extra hour at the fort or bail early for the sandbar without watching a clock. On the ferry you carry everything you brought across the sand. On the Marquis, the shaded aft deck, bathroom, galley, and cold cooler are steps from wherever you're swimming, and the swim platform puts you in and out of the water without a beach landing. Add three decks for 13 guests to spread out, Starlink WiFi if someone has to stay reachable, and life jackets in every size from infant to adult already aboard, and the two trips stop being comparable.
What to Pack
Keep it simple. Swimsuits and towels, water shoes for walking the fort ruins, reef-safe sunscreen, and a dry bag or waterproof case for phones that are going in the water anyway. Food and drinks are BYOB, with one rule: no glass bottles aboard. Cans, plastic, and koozies are perfect, and we provide the ice and cooler space. For the full checklist, see our complete packing guide.
What the Island Day Costs
The 6-hour version of this trip is $3,000 on a weekday and $3,600 on a weekend, all-inclusive: captain, crew, and fuel for the whole two-island run, with nothing added at checkout. Split across a full boat of 13 guests, that's roughly $231 per person weekday and $277 weekend for a six-hour private island-hopping day. A 50% deposit holds your date, with the balance due seven days before departure. Full pricing details are in our Tampa Bay charter cost guide.
Booking This Trip
The full two-island day runs best as a 6–8 hour charter aboard our 52ft Marquis Flybridge — up to 13 guests, all-inclusive rates ($500/hr weekdays, $600/hr weekends), captain and crew handling everything. Bring reef-safe sunscreen, water shoes for the fort ruins, and a dry bag for phones. Book the island day or call (727) 609-2248.
Shell Key & Egmont Key Day Trip — FAQ
Can you visit Shell Key and Egmont Key in one day?
Yes — it's one of our most popular full-day itineraries. Both islands sit near the mouth of Tampa Bay, about 30–40 minutes apart by yacht. A 6–8 hour charter comfortably covers both with long stops at each, plus lunch aboard in between.
How do you get to Egmont Key without a boat?
Egmont Key is accessible only by water — there's no bridge or road. A passenger ferry runs from Fort De Soto on a fixed schedule, but a private charter lets you set your own timing, anchor near the best snorkeling, and keep the yacht's shade, galley, and bathroom steps away.
Is there anything on Shell Key?
Intentionally, no — Shell Key is an undeveloped 1,800-acre barrier island preserve. That's the appeal: white sandbars, some of the best shelling on the Gulf Coast, calm shallow water, and regular dolphin traffic. No shops, no crowds, no buildings.
What is there to do on Egmont Key?
Walk the ruins of Fort Dade, a Spanish-American War-era fort slowly being reclaimed by the Gulf; visit the working 1858 lighthouse; snorkel the submerged fort structures on the island's southwest side; and watch for the resident gopher tortoises on the trails.
How much does a Shell Key and Egmont Key charter cost?
The 6-hour two-island day is $3,000 on weekdays (Mon–Thu) and $3,600 on weekends (Fri–Sun), all-inclusive with captain, crew, and fuel covered. Split across up to 13 guests, that's roughly $231 to $277 per person for the full day.
What should I bring on the island day trip?
Swimsuits, towels, water shoes for the fort ruins, reef-safe sunscreen, and a dry bag or waterproof phone case. Food and drinks are BYOB with no glass bottles allowed; ice and cooler space are provided, and life jackets in every size are already aboard.