Limited Time Offer: SPF 100
Stay longer, settle in, and enjoy more of Tranquility Bay with the SPF 100 offer.
Families can enjoy 20% off stays of 5 or more nights, plus a $100 nightly resort credit to use during their escape. Use it for waterfront dining, drinks by the water or simple moments that make your Florida Keys family vacation feel even more relaxed.
Book by August 18, 2026 for travel until January 31, 2027.
A Florida Keys Retreat Made for Family Time
More than a beach. A place to settle into the water.
Tranquility Bay is designed for families who want the beauty of the Keys with more room, more calm and more flexibility. Located in Marathon, the resort brings together spacious accommodations, private beach access, warm water, resort pools, waterfront dining and easy access to family-friendly activities in one relaxed setting.
Spacious Stays for Florida Keys Family Getaways
Ideal for families who want a little more room to spread out, Tranquility Bay’s two- and three-bedroom beachfront and waterfront villas feel easy and comfortable from the moment you arrive. With separate bedrooms, open living spaces, washer/dryer, full kitchens and private porches, everyone has space to relax without feeling on top of each other.
They’re a natural fit for family trips, giving you space to come together when you want to, and a little privacy when you need it.
Resort Amenities Made for Easy Family Days
Lagoon Pool
Relaxation Pool
Adults-Only Pool
Jack Nicklaus Putting Greens
Beach Volleyball
Bike Rentals
Fitness Room
Marathon Florida Family Activities Near Tranquility Bay
Staying in Marathon puts your family close to beaches, wildlife experiences and scenic landmarks, with plenty of easy ways to explore beyond the resort.
Nearby highlights include:
Coco Plum Beach
Florida Keys Aquarium Encounters
Pigeon Key
Dolphin Research Center
The Turtle Hospital
Sombrero Reef and Sombrero Beach
Seven Mile Bridge
Crane Point Hammock
For more family-friendly attractions across the Florida Keys, including Key West, Islamorada and Dry Tortugas, explore the wider area.
Plan Your Florida Keys Family Getaway
A family trip to the Florida Keys should feel easy, spacious and full of time together.
Settle into a beachfront villa or guest room, step onto a private beach, enjoy warm water and resort pools, then let each day unfold at your family’s pace.
Whether you are planning a South Florida weekend away, a school break escape or a longer family vacation in the Keys, Tranquility Bay gives you room to reconnect by the water.
Frequently Asked Questions
Which Florida Key is best for families?
Families looking for a quieter, more spacious Florida Keys experience may enjoy Marathon. It offers warm water, beaches, boating, wildlife experiences, local attractions and a central location for exploring the island chain.
Is Marathon, Florida good for a family vacation?
Yes. Marathon is a great option for families because it offers beaches, boating, wildlife experiences, snorkeling, family-friendly attractions and a quieter pace than some of the busier Florida Keys destinations.
What are family-friendly things to do in Marathon, Florida?
Families can enjoy kayaking, paddleboarding, boating, snorkeling trips, wildlife attractions, beach days, pool time and scenic sunset moments. Tranquility Bay also offers easy access to resort activities and nearby local attractions.
Does Tranquility Bay have spacious accommodations for families?
Yes. Tranquility Bay offers villas with spacious living areas, private porches, full kitchens and waterfront surroundings, making them a strong fit for families who want room to spread out.