
Casa Marina Key West
Best for families, larger groups, and travelers who want resort amenities (private beach, two pools, spa, several restaurants) in one property.
Prices in other currencies are estimates. You’re charged in USD.
Casa Marina Key West is a large, family-friendly 4-star oceanfront resort with multiple pools, a full spa, and several dining venues; read this if you want a resort-style Key West stay that works for kids and events. Southernmost House Adult Exclusive is a smaller 4-star historic oceanfront mansion at the southern end of Duval Street aimed at adults; read this if you prefer an intimate, adults-only inn within steps of Key West’s southern landmarks.
Updated · about 1.2 km apart

Best for families, larger groups, and travelers who want resort amenities (private beach, two pools, spa, several restaurants) in one property.

Best for adults seeking a compact, historic, adults-only inn within immediate walking reach of the Southernmost Point marker and Duval Street.
When Casa Marina Key West wins: choose Casa Marina if you want resort-scale amenities — a large private beach, two oceanfront pools (including an adults-only pool), Spa al Maré, multiple restaurants/bars, and extensive event space. It’s better for families, wedding parties, and guests who plan to spend days on property.
When Southernmost House Adult Exclusive wins: pick Southernmost House for location and intimacy — it’s a small, 18-room oceanfront mansion steps from the Southernmost Point and Duval Street, with a single pool, a café/bar with ocean views, and an adults-only policy that keeps the atmosphere quieter and more intimate.
Bottom line: both hotels are oceanfront and 4-star, but they answer different needs — Casa Marina is a full-service, family-oriented resort; Southernmost House is a compact, adults-focused historic inn for travelers prioritizing location and a quieter stay.
| Category | Casa Marina Key West | Southernmost House Adult Exclusive |
|---|---|---|
| Overall vibe | Large oceanfront resort with resort amenities, event spaces and family programming | Small historic oceanfront mansion with an adults-only, intimate atmosphere |
| Location | Oceanfront on Reynolds Street, roughly a 15-minute walk to the Southernmost marker and still under a mile from Duval Street | Oceanfront at 1400 Duval Street, steps from Southernmost Point and Duval Street |
| Size (rooms) | 311 rooms and suites across four floors | 18 air-conditioned rooms |
| Ages / policy | All ages welcome; families supported (children’s facilities and family pool); primary guest must be 21 to register | Adults-only property — children 18 and under not permitted; check-in minimum age 21 |
| Pools & beach | Two refurbished oceanfront pools (one adults-only, one family), plus roughly 1,100 feet of private beach and beach services | One outdoor pool and immediate oceanfront access; smaller property-scale beach access and terrace seating |
| Restaurants & bars | Multiple outlets including Dorada (oceanfront Baja‑Med) and The Canary Room cocktail bar, plus breakfast options and grab-and-go market | Seaside Cafe at Mansion with ocean-view seating and a bar/lounge; complimentary continental breakfast |
| Spa & wellness | Spa al Maré (beachfront cabana and indoor services), large fitness center, sunrise beach yoga | Not published |
| Known for | Historic 1920s landmark resort, largest private beach in Key West, extensive event/wedding space | Historic mansion setting at Key West’s southern tip and adult-only atmosphere |
| Front desk / service hours | 24-hour front desk with staffed arrivals assistance; resort services and pool concierge | Front desk with limited hours (open daily 8:00 AM–9:00 PM; arrivals after 8:00 PM need prior notice) |
| Parking | Self and valet parking available (fees apply) | Self parking available (surcharge) |
Casa Marina sits on Reynolds Street with a long private beach and is within walking range of Key West’s key attractions.
Casa Marina offers resort-scale oceanfront space a short walk from Key West sights while remaining slightly removed from Duval’s busiest blocks.
Southernmost House is on Duval Street’s southern end and places you practically at Key West’s famous southern marker.
Southernmost House is ideal when proximity to the Southernmost Point and immediate access to Duval Street matter most.
Casa Marina has a broad room mix across 311 rooms and suites, from pool-view rooms to multi-bedroom lofts and beachfront walkouts.
Choose Casa Marina for variety in room size and oceanfront suite options suitable for families and groups.
Southernmost House offers a small set of room types in a historic mansion format, many labeled 'Adults Only'.
Southernmost House is best if you want a compact, intimate room selection with some suites offering kitchen facilities.
Casa Marina has multiple on-site dining options for different moods, from beachside Baja‑Med to a 1920s-era breakfast venue and a cocktail bar.
Casa Marina provides more on-site choices for full meals, family dining, and evening cocktails.
Southernmost House keeps dining simpler with Seaside Cafe at Mansion and an ocean-view bar/lounge.
Southernmost House is best for travelers who prioritize location over multiple on-site dining venues.
Casa Marina features two refurbished oceanfront pools (one adults-only, one family) and extensive private beach frontage.
Casa Marina offers larger pool choices and a sizeable private beach setup built for families and events.
Southernmost House provides a single outdoor pool and immediate oceanfront settings appropriate to a small inn.
Southernmost House suits guests who prefer a compact, quiet pool and being adjacent to Key West’s southern shoreline over resort beach facilities.
Casa Marina supports wellness with Spa al Maré, fitness facilities, and scheduled beach yoga alongside evening bars and nearby nightlife.
Casa Marina balances on-site wellness services with accessible nightlife options both on property and nearby.
Southernmost House focuses on a quiet adults-only stay with straightforward service hours and a nearby lively Duval scene.
Southernmost House is for guests who want location-based nightlife access but prefer a quieter, adults-only base at night.

Casa Marina — family-friendly rooms, a dedicated family pool, kids’ activities, and a large private beach.

Southernmost House — located at the southern end of Duval Street, mere steps from the Southernmost Point marker and South Beach.

Casa Marina — Spa al Maré, two oceanfront pools, multiple restaurants and extensive event/wedding venues.

Southernmost House — small 18-room historic mansion with an adults-only policy and a quieter atmosphere.
Casa Marina — it’s explicitly family-friendly, has a family pool with child‑friendly depth, and offers activities for children.
Southernmost House — it sits at the southern end of Duval Street and is literally steps from the Southernmost Point marker.
Yes. Casa Marina has roughly 1,100 feet of private beach and full beach services; Southernmost House is oceanfront at the southern tip with immediate beach/shore access.
Casa Marina has Spa al Maré with beachfront cabana services and daily hours. Southernmost House does not publish a full-service spa.
Explore how Casa Marina Key West stacks up against other hotels nearby:
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