Koh Mai Si Lek
Protected Area
Mu ko Chang
Why dive here
With 54+ marine species recorded in the area - including sea turtles, tiger sharks and pufferfish - Koh Mai Si Lek offers some of Koh Tao's richest diving. Water ranges 29-31°C, warmest April, May, June.
Koh Mai Si Lek is an easy dive off Koh Tao, good for those still building their confidence or wanting a relaxed potter around. We’ve found the sandy bottom and scattered coral bommies host some cool macro life if you look closely – think tiny crabs and nudibranchs. Visibility can vary, but it’s generally calm here, making it a good spot for training dives or just unwinding underwater.
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Conditions
Ocean conditions, forecast and tides for Koh Mai Si Lek
Koh Mai Si Lek Ocean Conditions
Monthly averages for Koh Mai Si Lek, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (11.17, 101.33) (40km away)
October Averages
Sea Temperature
30°C
86°F · Range: 29.1–31.1°C
Current Speed
7.07 cm/s
Direction: E (98.1°)
Salinity
31.67 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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