Ko Bon
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 - Ko Bon offers some of Similan Islands's richest diving. Water ranges 29-31°C, warmest April, May, June.
Ko Bon is where we head when we're hoping for manta rays, particularly between November and May. It's a slope that descends to around 30 metres, covered in hard corals higher up and gorgonian fans deeper. The main draw is the cleaning station, a good spot to wait patiently for the big stuff. Currents can pick up, so it's best for experienced divers comfortable with drift diving.
Reviews for Ko Bon
Conditions
Ocean conditions, forecast and tides for Ko Bon
Ko Bon Ocean Conditions
Monthly averages for Ko Bon, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (8.1, 98.3) (6km away)
October Averages
Sea Temperature
30°C
85°F · Range: 28.7–30.4°C
Current Speed
5.1 cm/s
Direction: S (191.3°)
Salinity
29.75 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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