The SIN Rooftop Bar is one of the most glamorous spots in all of Bangkok. Located on the 27th floor of the Avani+ Riverside Hotel, it offers breathtaking views of the Chao Phraya River. The atmosphere is intimate, stylish, and yet lively – with red lighting, unique geometric designs, and house music playing until just after midnight. This rooftop bar is ideal for couples looking for a romantic date or friends wanting to start their evening in Bangkok in style.

The bar opens at 5:00 PM – perfect for sunset drinks – and closes at 1:00 AM, or sometimes later on weekends. If you want to avoid the 5,000 THB minimum spend for the tables by the glass, you can, of course, sit at one of the other tables or at the bar (like we did). However, you can easily reach that amount with a few cocktails and light meals. Admittedly, it's not the cheapest bar, but if you want to treat yourself to a special evening in Bangkok, it's an excellent choice.

What to order at the SIN Rooftop Bar

We arrived at 9:00 PM and had already eaten dinner, so we were only interested in the drinks menu. Cam ordered one of their signature cocktails, the "Forbidden Nectar," made with Kentucky bourbon and unusual ingredients like miso, caramel yogurt, and carrots. It was delicious, but very intense in flavor, so he preferred mojitos afterward. We were even served fresh, cold towels with our drinks—a nice touch.

The SIN Rooftop Bar offers an extensive beer and wine list, as well as exclusive small plates such as oysters, sausage and cheese specialties, ceviche, sashimi, Wagyu beef, pork belly, king crab, vegan tacos, and various desserts. These dishes are intended as small portions and snacks, not as full meals to be enjoyed with cocktails. We started with a few drinks at one of the tables inside before heading to the bar to be closer to the action.

View of the Chao Phraya River

The view of the Chao Phraya River makes the SIN Rooftop Bar truly special: at night, the river glows with lights, the Asiatique Ferris wheel shines on the opposite bank, and boats glide leisurely by. Even if you're not sitting right at the edge of the glass, you can wander around and take photos to your heart's content. We actually found the atmosphere at the bar to be the best – you can chat with the bartenders and other guests, watch the DJs up close, and constantly let your gaze wander.

Is the SIN Rooftop Bar worth visiting?

In our opinion, the SIN Rooftop Bar is definitely worth a visit. From the iconic red DJ booth to the cozy tables overlooking the river, everything makes it a phenomenal experience. The atmosphere is initially quiet and very intimate until 10:00 PM, when the bar fills up and the music becomes more energetic. Around midnight, everyone mixes together, dances, and has a great time. The only downside: it's quite expensive and probably not suitable for backpackers on a budget, as drinks cost between 500 and 700 THB.

SIN Rooftop Bar vs SEEN Restaurant

The SIN Rooftop Bar and the SEEN Restaurant are easily confused, as they are located just one floor below. However, both can easily be visited in the same trip. An elevator takes you from the ground floor of the building to the 26th floor (where SEEN is located), and from there, another elevator takes you to the 27th floor (where SIN is located). The restaurant offers indoor and outdoor seating and serves upscale fusion cuisine, ideal for families or larger groups who want to enjoy a relaxed meal before heading out for drinks.

The best way to get there

The best way to reach Sin Island is via the BTS Silom Line to Saphan Taksin station. From there, take the shuttle to Sathorn Pier and catch the hotel's complimentary boat. Alternatively, you can take the BTS Gold Line to Charoen Nakhon station (near ICONSIAM) and then use a taxi or Grab. However, please note that traffic in Bangkok is very heavy around 5:00 PM, so avoid taxis at this time. If you are staying at the Avani+ Riverside, the restaurant and rooftop bar are right outside your door.

Book your accommodation: Avani+ Riverside Bangkok Hotel

Frequently asked questions about the SIN Rooftop Bar

Do I need to book in advance?

Reservations are not mandatory for the SIN Rooftop Bar, but highly recommended due to its small size (80 seats). As with many rooftop bars in Bangkok, you have a 15-minute grace period after making your reservation in case your table isn't released. However, you can also simply drop by anytime after 5:00 PM. Even if all tables are reserved, you might still find a spot at the bar. All reservation information can be found on the official website.

What is the dress code for the SIN Rooftop Bar?

You'll be surprised how relaxed the dress code at SIN is compared to other rooftop bars in Bangkok. While it's advertised as "smart casual," shorts and flip-flops are still permitted. However, hotel slippers and tank tops for men are not allowed. To be on the safe side, though, a smart outfit is recommended, including long dress pants and closed shoes (for men). The luxurious riverside location practically demands a smart look anyway.

Which other rooftop bars should I visit?

Bangkok offers a seemingly endless selection of rooftop bars, with exciting new venues opening almost every month. Those seeking breathtaking views should definitely visit the Nobu Rooftop Bar. For those who want to combine stunning vistas with a lively party atmosphere, the Tichuca Rooftop Bar or the Akara Sky Hanuman are excellent choices.