Set along a private stretch of waterfront in Marathon, Tranquility Bay Beachfront Resort offers families a more spacious, flexible way to experience the Florida Keys. With beach houses designed for gathering and room to spread out, it’s a place where everyone can settle in comfortably.
Days move at your family’s pace, from mornings on the porch to time between the beach, pool and calm Gulf waters. With private beach access and easy access to activities for all ages, Tranquility Bay makes a Florida Keys family vacation feel easy and unhurried.
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.
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.
Whether you are planning a South Florida drive-down escape, a school break getaway, a multigenerational trip or a longer family vacation in the Florida Keys, this is a place where the pace softens naturally.
A private 2.5-acre white sand beach gives families space to relax, play by the water and enjoy a calmer Florida Keys beach experience.
From kayaking and paddleboarding to relaxed shoreline time, Tranquility Bay keeps families close to the warm water that makes the Keys special.
With multiple pools, families can move easily between beach time, pool time and quiet moments in the sun.
Tranquility Bay offers bikes and beach games, making it easy for families to explore and enjoy active time together.
While the kids stay active, adults can unwind with in-suite spa services, enjoying a quiet moment to relax and recharge during a family getaway.
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.
Some of the best family memories in the Florida Keys happen on the water.
At Tranquility Bay, families can enjoy easy access to watersports and calm Gulf adventures. Spend time kayaking together, try paddleboarding along the shoreline or add more excitement with a Jet Ski rental.
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:
For more family-friendly attractions across the Florida Keys, including Key West, Islamorada and Dry Tortugas, explore the wider area.
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.
