
Reefhouse Resort & Marina
Best for families and on-site activities—private beach, kids’ options, and a full-service spa make Reefhouse a strong pick for multigenerational stays.
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Reefhouse Resort & Marina is a family-friendly waterfront resort in Key Largo with a private beach, on-site marina, spa, and multiple casual restaurants. Three Waters Resort and Marina, Islamorada, a Tribute Portfolio Resort is a branded, marina-front Marriott Tribute property in Islamorada with multiple pools, dining outlets, and meeting space—good to compare if you want a known-brand Keys resort with marina access.
Updated · about 19 miles (30 km) apart

Best for families and on-site activities—private beach, kids’ options, and a full-service spa make Reefhouse a strong pick for multigenerational stays.

Best for Marriott/Tribute Portfolio guests and groups looking for multiple pools and large meeting/event capacity at a branded Islamorada marina resort.
When Reefhouse Resort & Marina wins: pick Reefhouse if you want an all-ages waterfront property with a private beach, family-oriented programming, on-site spa (By the Bay/Opal Spa), and easy access to John Pennekamp Coral Reef State Park near Key Largo.
When Three Waters Resort and Marina wins: choose Three Waters if you prefer a Marriott-affiliated, Islamorada location with multiple outdoor pools, a prominent on-site marina, more meeting rooms, and an adults-only room cluster option (The Cove) for quieter ocean-view accommodations.
Bottom line: Reefhouse is the better family-oriented Key Largo choice for beach access, a spa, and family dining; Three Waters is the stronger fit for travelers who value Marriott/Tribute Portfolio branding, multiple pools, larger conference capacity, and a marina-setting in Islamorada.
| Category | Reefhouse Resort & Marina | Three Waters Resort and Marina, Islamorada, a Tribute Portfolio Resort |
|---|---|---|
| Overall vibe | Family-friendly waterfront resort with spa and activity program | Branded, marina-front resort with multiple pools and meeting rooms |
| Location | Key Largo, steps from John Pennekamp Coral Reef State Park | Islamorada, oceanfront on the Overseas Highway near local attractions |
| Size (rooms) | 153 accommodations | 214 individually decorated guestrooms |
| Ages / adults-only | All ages welcome; main guest must be 21 to check in; children 17 and under stay free | Not adults-only hotel overall but room inventory includes Adults Only at The Cove (21+); main guest check-in age may be 21 |
| Pools | Two pool areas; outdoor heated-and-cooled pool plus hot tub | Three outdoor pools (listed in supplier amenities) |
| Beach | Private beach with loungers, umbrellas, towel service | |
| Restaurants & bars | Three on-site venues (Gus' Grille, Breezer's Tiki Bar, Flipper's Pool Bar) | Four restaurants and 2 coffee shops/cafes plus several bars/lounges |
| Spa & wellness | Full-service spa (By the Bay / Opal Spa) with published hours and signature treatments | Not published |
| Marina & watersports | On-site marina with diving, snorkeling, fishing charters, parasailing, wave runners | |
| Meetings & events | Multiple indoor/outdoor event spaces, several named venues and ballrooms (16,384 sq ft listed) | Large conference space (87,295 sq ft) and 10 meeting rooms |
Reefhouse sits on 17 waterfront acres in Key Largo, a short drive or walk to John Pennekamp Coral Reef State Park.
Reefhouse is ideal if you want immediate access to Key Largo’s dive/snorkel scene and nearby state-park activities.
Three Waters is on the Overseas Highway in Islamorada with ocean frontage and easy marina access.
Three Waters places you in Islamorada for more of the Middle Keys’ dining and marina-focused activity options.
Reefhouse offers 153 rooms and suites designed for families and waterfront views.
Reefhouse is set up for families and groups who need flexible room configurations and family-friendly policies.
Three Waters lists 214 individually decorated guestrooms, including an adults-only cluster called The Cove.
Three Waters gives both standard and adults-only room choices; check The Cove (21+) if you want a quieter adult-focused room.
Reefhouse centers dining on three casual venues with seafood and family-friendly menus.
Reefhouse keeps dining simple and family-friendly with three on-site spots for breakfast through evening cocktails.
Three Waters offers multiple restaurants and cafes plus bars and lounges on property.
Three Waters gives more on-property dining variety and multiple bar options for groups and couples.
Reefhouse emphasizes a private beach and waterfront activity center alongside heated-and-cooled pools.
Pick Reefhouse for family beach time plus easy access to snorkeling, diving, and chartered fishing from the resort marina.
Three Waters lists three outdoor pools and direct access to marina activities and beach areas.
Three Waters is a marina-forward choice with several pool areas and on-site watercraft options to choose from.
Reefhouse operates a full-service spa (By the Bay/Opal Spa), plus 24-hour fitness facilities and evening entertainment at the tiki bar.
Reefhouse is a good pick if you want on-site spa treatments plus casual evening live music and tiki-bar vibes.
Three Waters lists 24-hour fitness facilities and several bars; spa details are not published in the supplied listing.
Three Waters offers fitness and nightlife options on property; if a dedicated spa is a must, confirm details when booking.

Reefhouse — private beach, kids-friendly dining and activities, children 17 and under stay free.

Three Waters — Tribute Portfolio affiliation appeals to Marriott/Bonvoy members and those who prefer branded programs.

Three Waters — large conference-space listing (87,295 sq ft) and 10 meeting rooms make it a strong meetings pick in Islamorada.

Reefhouse — full-service By the Bay / Opal Spa with published hours and signature treatments.
Reefhouse — it’s explicitly family-friendly, offers children 17 and under stay free policies, kids menus and family activities; Three Waters has family rooms but also an adults-only room cluster (The Cove).
Yes — the supplier inventory includes several room types labeled Adults Only at The Cove (21 Plus), but the property listing overall is not listed as fully adults-only.
Three Waters lists three outdoor pools; Reefhouse lists two pool areas (including a heated-and-cooled pool and hot tub).
Yes — both properties list an on-site marina and a range of watersports and boat-tour options.
Explore how Reefhouse Resort & Marina stacks up against other hotels nearby:
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