Top picks for Marathon Water activities
Discover 34 Water activities in Marathon on Trip.com, updated 20 October 2026, with experiences lasting from 1 to 16 hours. Find the perfect adventure for your day!
From €35.49 per person, with an average total of €104.24. Choose the option that suits your plan.
With 5.003k verified reviews, Water activities Marathon boast an average rating of 4.7.
This week's most popular Water activities: "Key West Dolphin Watch and Snorkel Tour - Eco Adventure", with 1.082k reviews and a 4.7 rating.
Now on Trip.com: "Key West Dolphin Watch and Snorkel Tour - Eco Adventure", a 3-hour adventure in Marathon!
The next available day tour departs on 21 October 2026. Book now to secure your spot!
Marathon Water activities usually take about 3 hours — perfect for a relaxed, immersive experience!
70% of Marathon Water activities now offer English-speaking guides
October is the perfect time to visit Marathon! Choose from 34 available day tours, including seasonal favorites like Key West Dolphin Watch and Snorkel Tour - Eco Adventure.
Your trip, worry-free! All day tours are run by licensed suppliers with verified reviews, and many include free cancellation before departure.
Search attractions or local attractions & tours
Water activities
Book now for today
Book now for tomorrow
34 results for Marathon Water activities
Sort by
Recommended
4.7/5· 1.1k reviews· 41 bookedFree cancellationBook now for tomorrow92.2% of travelers recommendFrom€65.34
4.8/5· 145 reviewsFree cancellationBook now for tomorrow95.9% of travelers recommendFrom€52.72
4.8/5· 905 reviewsFree cancellation94.7% of travelers recommendFrom€66.93
4.3/5· 124 reviewsFree cancellationBook now for tomorrowFrom€44.11
4.9/5· 760 reviewsFree cancellationBook now for tomorrow100 consecutive positive reviewsFrom€141.89
4.2/5· 424 reviewsFree cancellationBook now for tomorrowFrom€47.93
4.8/5· 92 reviewsFree cancellationBook now for tomorrow94.6% of travelers recommendFrom€57.52
4.7/5· 133 reviewsFree cancellationBook now for tomorrowFrom€97.75
Free cancellationBook now for todayFrom€57.52
4.6/5· 302 reviewsFree cancellationBook now for tomorrowFrom€47.93
4.6/5· 231 reviewsFree cancellation25 consecutive positive reviewsFrom€66.93
From€67.11
Free cancellationBook now for tomorrowFrom€668.39
4.8/5· 191 reviewsFree cancellationBook now for tomorrow68 consecutive positive reviewsFrom€127.66
From€70.50
5.0/5· 5 reviewsFree cancellationBook now for tomorrow5% offLimited-time saleFrom€56.04€58.99
5.0/5· 1 reviewFree cancellationBook now for tomorrow5% offLimited-time saleFrom€68.15€71.74
4.7/5· 141 reviewsFree cancellationBook now for tomorrow22 consecutive positive reviews5% offLimited-time saleFrom€68.15€71.74
4.4/5· 11 reviewsFree cancellationBook now for tomorrow5% offLimited-time saleFrom€35.49€37.36
1
2
Explore top experiences
See what other travellers love, based on ratings and bookings
Frequently asked questions about Marathon Water activities
How many Water activities are available in Marathon on Trip.com?
What are the best Water activities in Marathon?
What are the top-rated Water activities in Marathon?
How can I contact Trip.com customer support?
Can I change or cancel my booking?
How can I get discounted prices?
Reviews/Trip Moments
★
★
★
★
★
Reviews: Key West Dolphin Watch and Snorkel Tour - Eco Adventure
Guest User2026-02-06
We booked a snorkeling excursion with FURY, one of Norwegian Cruise Line’s shore excursions and the 2025 Travels Choice Award winner for Outstanding Water Adventures in the Keys. FURY has been a staple here for more than three decades, and it shows.
Quick tip: You can book this excursion directly through the FURY website and save some money. However, booking through the cruise line guarantees you won’t be left behind if there’s a delay returning to port. With such limited time in Key West, the extra cost was worth it for peace of mind.
Within minutes, we’re off—along with a boatload of fellow NCL passengers—aboard one of FURY’s catamarans. This is a very popular excursion. Everything you need is provided: snorkeling gear, vests, flotation noodles, and even wetsuits available for rent. FURY also has equipment for all shapes and sizes… including kids!
During the 30-minute ride out to the reef, I chat with Captain Willie about the adventure ahead. Soon enough, it’s time to enter the water. Captain Willie gives us a heads-up—the water is a bit rough and cool, around 70 degrees. But we suck it up and take the plunge!
We’re snorkeling over a portion of North America’s largest living reef. Visibility is pretty good, and the scenery is stunning—sea fans sway harmonically with the current, coral heads rise from the ocean floor, and marine life surrounds us.
As Captain Willie explained, this is the Rock Key Sanctuary, just east of Sand Key. There’s a strictly enforced no-touch, no-take policy, helping preserve this fragile ecosystem. We’re swimming in 10 to 25 feet of water, making it perfect for all skill levels.
Denise points out a yellowtail snapper swimming below us, while another species nibbles at the living coral rock. Even with nearly 100 swimmers on the reef, it somehow feels like we’re all alone—completely immersed in this tropical wonderland. The swaying sea fans are hypnotic.
We give this adventure a big thumbs up as we head back to the Pacific Fury, where Captain Willie gets the party started for the ride back.
It’s been 20 years since we last explored the Florida Keys coral reef, and honestly, it rivals what we’ve experienced in Hawaii and the U.S. Virgin Islands.
If you’re visiting Key West, this is an absolute must-see experience★
★
★
★
★
Reviews: Key West Afternoon Reef Snorkeling with Open Bar
Guest User2024-07-17
We had a great time - we saw lots of fish, sting rays, barracudas. The water was beautiful and the boat ride was fun. The drinks were great and the crew was very helpful.★
★
★
★
★
Reviews: Half Day Snorkel Trip on Reefs in the Florida Keys
Guest User2026-01-27
We had the most amazing time and saw so many cool fish and reefs and we got to see the statue of Jesus of under water!! Such a cool time will definitely do again★
★
★
★
★
Reviews: Key West Reef Snorkel – Morning Mimosas or Afternoon Margaritas
Guest User2024-05-26
It was definitely packed because of the holiday weekend but it was still very organized. The crew was so friendly and great!! I would totally recommend this to friends and family! My boyfriend and I had so much fun snorkeling and saw some cool fish friends.★
★
★
★
★
Reviews: Key West Full-Day Ocean Adventure: Kayak, Snorkel, Sail
Guest User2026-01-04
We had a wonderful day. We thought it would be a tourist trap, but it wasn't at all. An old sailboat in very good condition, incredibly friendly, helpful, and cheerful staff. A high-quality cold buffet lunch with unlimited drinks. I highly recommend this experience. Go for it, you won't be disappointed.★
★
★
★
★
Reviews: Key West Afternoon Snorkel Sail with Unlimited Cocktails!
Guest User2024-07-14
This was without a doubt our favorite family adventure on our weeks vacation. Highly recommend! The captain and crew were nothing short of phenomenal.