Guam
Dirty Rock
About this Dive Site
Description
Dirty Rock, located off Cocos Island, is a legendary dive site for experienced adventurers. This dramatic rock formation is a magnet for large schools of hammerhead sharks, majestic manta rays, and powerful jacks, but be prepared for potentially strong currents.
Best Time to Dive
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 29°C | 29°C | 29°C | 30°C | 30°C | 30°C | 30°C | 30°C | 30°C | 29°C | 29°C | 29°C |
Peak Season
March, April, January, February, May, October, November, December
Jan
Clear waters, excellent for spotting larger marine life like turtles and reef sharks.
Feb
Calm seas and high visibility, ideal for exploring the diverse reef structures.
Mar
Peak visibility, perfect conditions for encountering pelagic species.
Apr
Warmest water, exceptional visibility, potential for manta ray sightings.
More monthly highlights
May
Good visibility, increasing chance of plankton blooms attracting marine life.
Jun
Start of the rainy season, visibility can be reduced by runoff.
Jul
Rainy season, expect showers and potentially lower visibility.
Aug
Peak of the rainy season, visibility is often compromised.
Sep
Rainy season ending, visibility starts to improve.
Oct
Post-rainy season clarity, excellent conditions for exploring the outer reefs.
Nov
Manta ray season begins, good chance of sightings at cleaning stations.
Dec
Manta ray season continues, excellent diving with high visibility.
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