Cozumel, Mexico
    Arrecifes de Cozumel

    Chun Chacaaab Reef

    Good diving all year

    Protected Area

    Arrecifes de Cozumel

    Why dive here

    With 177+ marine species recorded in the area - including barracuda, bull sharks, dolphins, eagle rays and nurse sharks - Chun Chacaaab Reef offers some of Cozumel's richest reef diving. Water ranges 27-30°C, warmest August, September, October.

    Best timeYear-round
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Bull Sharks, Dolphins, Eagle Rays and Nurse Sharks · 177+ species recorded
    Water27-30°C · warmest August, September, October
    CharacterReef dive
    StandoutExceptional marine biodiversity

    Chun Chacaaab Reef is a site we always make time for in Cozumel, especially if we’re looking to escape the usual crowds further south. It’s got a genuine laid-back feel, a place where you can just drift and observe. We often spot the big parrotfish here, those impressive Dark Green Parrotfish with their striking colours, munching away at the coral. Look closely among the nooks and crannies and you’ll likely find a Caribbean Chestnut Moray peeking out, or the shy Candy Basslet darting into cover. What we really love about Chun Chacaaab is the sheer variety of smaller stuff. You'll see Eyed Flounder perfectly camouflaged on the sandy patches, and the intricate patterns of a Spotted Trunkfish are always a treat. Our favourite is watching the Yellowhead Wrasse diligently cleaning other fish, a mini drama playing out right in front of you. It’s a site that rewards a slow, observant dive. Come here for a relaxed pace, where the current is usually gentle, allowing you to really soak in the smaller details rather than just zipping past.

    Safety Notes

    Strong currents typical this month (avg 79 cm/s). Good buoyancy control essential.

    Today05:4217:2911h 47m daylightGolden hour 17:00

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    Conditions

    Ocean conditions, forecast and tides for Chun Chacaaab Reef

    Chun Chacaaab Reef Ocean Conditions

    Monthly averages for Chun Chacaaab Reef, sourced from NOAA NDBC + Copernicus Marine (EU) - nearest station: Yucatan Basin - 120 NM ESE of Cozumel, MX (227km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    30°C

    85°F · Range: 28.7–32.3°C

    Air Temperature

    29°C

    84°F

    Current Speed

    78.6 cm/s

    Direction: NE (36.7°)

    Chlorophyll-a

    0.046 mg/m³

    Very clear (oligotrophic)

    Salinity

    35.99 PSU

    Wave Height

    1.1m

    6.7s period

    Wind Speed

    5.5 m/s

    10.7 knots

    Atmospheric Pressure

    1010.7 hPa

    Visibility

    24.1 nmi

    Based on 5 years of monitoring data · Data sources: NOAA NDBC + Copernicus Marine (EU)

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