Num Chai Bay

Best months: Jan–May

Protected Area

Mu Ko Similan

Why dive here

With 173+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - Num Chai Bay offers some of Similan Islands's richest reef diving. Water ranges 29-31°C, warmest April, May, June.

Best timeJan–May

WetsuitA 3mm shorty or thin full wetsuit

Marine lifeBlacktip Reef Sharks, Eagle Rays, Giant Moray Eels, Whale Sharks and Clownfish · 173+ species recorded

Water29-31°C · warmest April, May, June

CharacterReef dive · max 5-20m

StandoutExceptional marine biodiversity

Num Chai Bay offers a straightforward dive on the eastern side of the Similan Islands. It’s mostly a sandy bottom with scattered coral bommies, attracting a good variety of reef fish. We've seen schools of snapper congregating here, along with the occasional reef shark cruising by. It’s a solid choice for a second dive or if you’re looking for calmer conditions.

Typical Num Chai Bay Dive Profile

Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

Today06:1818:1611h 58m daylightGolden hour 17:48

Reviews for Num Chai Bay

Conditions

Ocean conditions, forecast and tides for Num Chai Bay

Num Chai Bay Ocean Conditions

Monthly averages for Num Chai Bay, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (8.1, 98.3) (6km away)