Octave Rooftop Lounge & Bar occupies the top three floors of the Bangkok Marriott Hotel Sukhumvit, climbing from a 45th-floor open-air tapas restaurant up through a 46th-floor lounge to a circular 49th-floor sky bar with unbroken 360-degree views over Thonglor and lower Sukhumvit. The layout is the point here. You can move between three distinct rooms in one visit, each with its own soundtrack and pace, and each framed by a different slice of the skyline.
The bar has been a fixture of the Thonglor drinking scene since the Marriott opened on Soi 57, and it remains one of the later-serving rooftop options in the neighborhood, running daily from 5 PM through to 2 AM. Resident DJs play nightly, pulling from R&B, pop and house, and the crowd skews toward the post-work Sukhumvit set along with hotel guests and visitors coming up specifically for the view.
You enter through the hotel lobby on Sukhumvit Soi 57 and take the dedicated lift up. Start at the 45th-floor restaurant for modern Asian tapas at an open-air table, then climb the internal stairs to the 46th-floor lounge for cocktails, and finally push up to the 49th-floor circular sky bar where the view opens completely on all sides. The vibe builds through the night, quieter and more food-focused early, fuller and more dance-forward after 10 PM when the DJ sets hit their stride.
Dress code is smart-casual and enforced: no sportswear, flip-flops, shorts or sleeveless tops for men. Book ahead on weekends, particularly for a table on the 49th floor at sunset, which is the window everyone wants.
The cocktail list at Octave Rooftop Lounge & Bar leans into color and local sourcing. Purple Ovation pairs butterfly pea and lemon-infused Tanqueray gin with Luxardo Maraschino liqueur, turning a deep indigo in the glass. Overture Old Fashioned is the bar's house riff on the classic, built on Johnnie Walker Gold Label stirred with Fernet Branca and Angostura bitters. Bangkok 57 is a nod to the hotel's Soi 57 address, with Chandon Brut topped by saffron-infused Ketel One vodka. Alongside these, the Thai-inspired locale cocktails rotate through tropical fruits and regional ingredients, each drink named for a Thai destination such as Phuket, Chiang Mai, Lamai or Lumpini.
Octave sits atop the Bangkok Marriott Hotel Sukhumvit at Soi 57, a short walk from BTS Thong Lo station and the main Thonglor strip. It is a rooftop bar in Thonglor, Bangkok, easy to pair with dinner on Soi Thonglor or drinks further down Sukhumvit before or after.
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