Koh Bon, North Reef

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 - Koh Bon, North Reef 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 23m

StandoutExceptional marine biodiversity

Koh Bon’s North Reef is a solid choice when you’re looking for a relaxed dive in the Similans. It’s not the most dramatic wall, but the gentle slope offers plenty to explore, especially for newer divers. We often find leopard sharks resting on the sandy patches around 18-20 metres, and there’s always a good chance of seeing mantas cruising past the main pinnacle if the current is right. Keep an eye out for colourful nudibranchs on the coral bommies; they’re often overlooked but well worth a closer look. It’s an easy-going dive, perfect for getting comfortable with the local conditions.

Typical Koh Bon, North Reef Dive Profile

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

Safety Notes

Depth of 23m - Advanced Open Water certification recommended.

Always perform a 3-minute safety stop at 5m before surfacing.

Today06:1718:1511h 58m daylightGolden hour 17:48

Reviews for Koh Bon, North Reef

Conditions

Ocean conditions, forecast and tides for Koh Bon, North Reef

Koh Bon, North Reef Ocean Conditions

Monthly averages for Koh Bon, North Reef, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (8.1, 98.3) (6km away)