Big Blue
Protected Area
Khao Lak - Lam Ru
Why dive here
With 173+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - Big Blue offers some of Similan Islands's richest diving. Water ranges 29-31°C, warmest April, May, June.
Big Blue, off the Similan Islands, often gets overlooked for some of the flashier sites nearby, but it’s a solid dive, especially if you’re into the smaller stuff. We usually find a good mix of nudibranchs here, tucked into crevices along the reef. It’s mostly a gentle slope, making it a good choice if you're feeling a bit rusty or just want a relaxed dive to focus on your photography. Look for the Indian Scads schooling near the drop-off, and we’ve seen eagle rays cruise by early in the morning. A great place to unwind after a current-heavy drift.
Nearest Dive Centres to Big Blue
Dive shops near Big Blue
IQ-Dive
Sea Dragon Dive Center
Burma Diving Safaris
Go2Similan
Andaman Scub
ME Diving
Reviews for Big Blue
Conditions
Ocean conditions, forecast and tides for Big Blue
Big Blue Ocean Conditions
Monthly averages for Big Blue, 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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