Heaven Sauna

On the quieter side of Silom, Heaven Sauna draws a friendly, mostly mature crowd who come for an easygoing afternoon soak and a chat. It’s on Soi Mahesak, a short walk from Surasak BTS, tucked inside the BIS Building on the 4th floor. Doors open at 1pm, so weekday visits feel relaxed; by late afternoon and on weekends the vibe picks up. Inside you’ll find the essentials done right: dry sauna and steam rooms, private cabins and darker corners upstairs, plus a small gym if you want to warm up before the heat. The rooftop garden is the signature spot — grab some air, slide into the jacuzzi, and watch the sky turn pink over Bang Rak. There’s a simple bar for cold beers and soft drinks and a few easy Thai plates when you need a reset between rounds. Regulars skew bears, daddies and their admirers, with a good mix of Thai guys, expats and in‑the‑know visitors. Staff keep the place tidy and the vibe respectful. Aim for late Saturday or a public holiday if you want it lively; earlier in the week is quieter and better for conversation. Address: 119 Soi Mahesak, BIS Building, 4th Floor, Suriyawong, Bang Rak. Last checked April 2026.