Best Things to Do in Key West, FL With Kids
Key West's best family days are Fort Zachary Taylor State Park (the best swimming beach in Key West, with real shade and a moat-protected snorkel area), a reef snorkel tour, the Key West Butterfly & Nature Conservatory, a Dry Tortugas day trip (expensive but genuinely unforgettable, by ferry or seaplane), and a sunset schooner sail off Mallory Square. The Hemingway Home is worth adding if your kids like cats and don't mind crowds — it's a fine cultural stop, not a must-do.
Want a resort shortlist for your Key West trip too?
60-second match. Free. No email required to see picks.
1Area photo: Radomianin / Wikimedia Commons (CC BY-SA 4.0)Fort Zachary Taylor State Park Beach
The best actual swimming beach in Key West — most of the island's shoreline is rocky or has minimal sand, but the fort's beach has a protected, moat-like reef area that keeps the water calm and shallow, plus real shade from mature trees, which is rare on this part of the island. It's also historically significant (a Civil War-era fort you can tour) if the family wants a light cultural add-on to the beach day.
Watch out: The 'sand' here has some coral rubble mixed in rather than being pure soft sand, so water shoes help, especially for younger kids. It's popular for sunset viewing too, so afternoons can get busier than mornings.
2Area photo: Radomianin / Wikimedia Commons (CC BY-SA 4.0)Reef Snorkel Tour
A boat ride out to the living coral reef offshore, part of the same barrier reef system running the length of the Florida Keys, with noticeably better visibility and marine life than what's available from shore. Most operators include gear and a guide who points out specific fish and coral formations, which keeps kids engaged rather than just floating and looking around.
Watch out: Reef health and visibility vary by day and recent weather — ask the operator about current conditions before booking, especially after storms. Boat rides can be choppy on windy days; consider motion-sickness prevention for kids prone to it.
3Area photo: Radomianin / Wikimedia Commons (CC BY-SA 4.0)Key West Butterfly & Nature Conservatory
A glass-enclosed, climate-controlled garden with hundreds of free-flying butterflies from around the world plus some birds, making it a comfortable, air-conditioned-adjacent break from Key West's heat. It's small enough to fit into a spare hour or two, which makes it an easy add-on rather than a full commitment.
Watch out: It's genuinely small — don't plan a whole afternoon around it, an hour to ninety minutes covers it well. Best visited earlier in the day when butterflies are most active.
4Area photo: Radomianin / Wikimedia Commons (CC BY-SA 4.0)Dry Tortugas National Park Day Trip
Genuinely one of the most memorable day trips in the Florida Keys — Fort Jefferson, a massive 19th-century coastal fort on a remote island, surrounded by some of the clearest water and best-preserved reef in the region. The ferry ride includes breakfast and lunch and a guided fort tour; the seaplane option cuts transit time dramatically but at a significantly higher price.
Watch out: This is a real splurge — budget for it honestly rather than treating it as a casual add-on, since the ferry alone runs well into the hundreds of dollars for a family of 4. The ferry ride is about 2.5 hours each way and can be rough in open water; anyone prone to seasickness should plan accordingly, which is part of why the pricier seaplane appeals to some families.
5Area photo: Radomianin / Wikimedia Commons (CC BY-SA 4.0)Sunset Schooner Sail off Mallory Square
The classic, lower-cost Key West evening — a traditional schooner sail out into the Gulf timed to watch the sunset from the water, away from the street-performer crowds that gather at Mallory Square itself. It's relaxed, scenic, and a good wind-down activity after an active day.
Watch out: Some sunset sails lean toward an adults-focused open-bar crowd — check that you're booking a family-coded departure rather than a party-boat one, since both are marketed similarly. Seating is often bench-style on deck; bring a light layer since it cools off on the water once the sun goes down.
Frequently asked
Is the Dry Tortugas trip really worth the cost?
For most families who can afford it, yes — it's a genuinely unique experience combining a massive historic fort with some of the best water clarity and reef in the Keys. But it's a real splurge, not a casual add-on, so budget for it deliberately rather than assuming it fits into a standard daily activity budget.
Is the Hemingway Home worth visiting with kids?
It's a fine, optional cultural stop — kids who like cats tend to enjoy spotting the famous six-toed felines around the property, but it gets crowded and the literary history itself appeals more to adults. Treat it as a nice-to-have rather than a must-do for every family.
Where's the best place to actually swim in Key West?
Fort Zachary Taylor State Park has the best swimming beach on the island by a wide margin — a reef-protected, calmer water area with real shade, unlike most of Key West's rocky or sand-limited shoreline elsewhere.
How should we budget activities for a 5-day Key West trip?
Without Dry Tortugas, plan $500–$800 for a family of 4 covering Fort Zachary Taylor, a reef snorkel tour, and a sunset schooner sail. Adding a Dry Tortugas ferry day trip pushes total activity spending up by $700-1,100 more, so decide on that one deliberately.
Same destination, where to stay
Booking these activities? Pick the right resort first.
Activity days work best when your resort is the right launch pad. Our Key West family-resort guide ranks the whole-family-experience winners.
Best Family Resorts in Key West →Things to do in similar destinations
Same family-activity angle, different destination.
Quintana Roo, Mexico
Cancun
Xel-Há All-Inclusive Eco Park · Xcaret Park (Plus Pass) · Chichen Itza + Cenote + Valladolid Day-Trip
Things to do in Cancun →
FL, United States
Orlando
Kennedy Space Center Visitor Complex Day · Gatorland — Florida's Original Attraction · Discovery Cove (Reserved-Day, All-Inclusive)
Things to do in Orlando →
Plan a full Key West family trip
Tell the Advisor your kids' ages, your budget, and your travel window. We'll match a resort, an activity stack, and the booking-window math that beats peak pricing.