Royal Caribbean· Oasis Class
Harmony of the Seas
Harmony of the Seas launched in 2016 at 226,963 GT as the third Oasis-class ship. It was the first ship to feature the Ultimate Abyss slide and carries 5,479 guests at double occupancy across 16 guest-accessible decks.
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Ship specs
- Cruise line:Royal Caribbean
- Ship class: Oasis
- Year launched:2016
- Gross tonnage:226,963 GT
- Length:1,188 ft
- Passengers (double occupancy):5,479
- Passengers (max): 6,687
About Harmony of the Seas
Harmony of the Seas launched in 2016 at 226,963 GT as the third Oasis-class ship. It was the first ship to feature the Ultimate Abyss slide and carries 5,479 guests at double occupancy across 16 guest-accessible decks.
Best for: This ship works well for multigenerational family groups, thanks to dozens of connecting staterooms and a strong mix of activities for all ages.
Key features and highlights
- ▸The Ultimate Abyss is the tallest slide at sea, plunging 10 stories from the pool deck.
- ▸The Bionic Bar features robotic arms that mix and serve cocktails, preparing up to 1,000 drinks per day from 30 spirits and 21 mixers.
- ▸Two FlowRider surf simulators and a full zip line across the Boardwalk keep thrill-seekers busy.
- ▸Studio B serves as both an ice-skating rink and a venue for full ice shows.
- ▸Central Park is an open-air neighborhood with live plants, fine dining, and a jazz club.
What to know before you book
Cabin tips
Harmony has an unusually large selection of connecting staterooms, making it ideal for families or groups. If you want a quiet retreat, book a Central Park balcony mid-ship. Virtual Balcony interior rooms (172 sq ft) use HD screens to simulate an ocean view and offer solid value.
Dining
About 20 dining venues include the upscale 150 Central Park, Giovanni's Table for Italian, Samba Grill Brazilian Steakhouse (added during amplification), and the complimentary Park Cafe for a quick Kummelweck roast beef sandwich.
Entertainment
Nightly shows run in the 1,400-seat Royal Theater, the AquaTheater hosts diving and acrobatic performances, and the Bionic Bar's robot bartenders are worth visiting for the spectacle alone. A jazz club, karaoke bar, and comedy club round out the nightlife.
Cabin sizes by category
Interior
| Subcategory | Cabin size | Balcony | Max guests |
|---|---|---|---|
| Standard Interior, Promenade View, Boardwalk View, Park View, Family Interior | 172-260 sq ft | Not published | Not published |
Oceanview
| Subcategory | Cabin size | Balcony | Max guests |
|---|---|---|---|
| Standard Oceanview, Ultra Spacious Oceanview | 179-271 sq ft | Not published | Not published |
Balcony
| Subcategory | Cabin size | Balcony | Max guests |
|---|---|---|---|
| Spacious Balcony, Boardwalk Balcony, Park Balcony, Family Balcony | 182-271 sq ft | 50-82 sq ft | Not published |
Suite
| Subcategory | Cabin size | Balcony | Max guests |
|---|---|---|---|
| Junior Suite, Grand Suite, Panoramic Suite, Star Loft Suite, Owner's Suite, AquaTheater Suite, Four-Bedroom Family Suite, Royal Loft Suite | 287-1524 sq ft | up to 843 sq ft | Not published |
Cabin sizes are sourced from deck plan databases and may vary by specific stateroom number. Always confirm with the cruise line before booking.
Frequently asked questions
How big is the Harmony of the Seas?
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More on Royal Caribbean
Other Royal Caribbean ships
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Caden Sorenson runs Travel Vient, an independent travel research and tools site covering airline carry-on policies, packing lists, and head-to-head airline, cruise, and destination comparisons, with everything cited to primary sources. He's a senior staff engineer with 15+ years of experience building iOS apps, web platforms, and developer tools, and a Computer Science graduate from Utah State University. Based in Logan, Utah.
Sources & verification
- year-launched:https://www.royalcaribbeanpresscenter.com/fact-sheet/harmony
- length-overall:https://www.royalcaribbeanpresscenter.com/fact-sheet/harmony
- gross-tonnage:https://www.royalcaribbeanpresscenter.com/fact-sheet/harmony
- cabin-dimensions:https://www.cruisedeckplans.com/DP/ships/Harmony-of-the-Seas/staterooms
Verified Jun 2026. Ship specs and cabin sizes can change with refurbishments and reconfiguration. Confirm with the cruise line before booking.