When To Go · Destination Guide
Cocos Island
Remote Pacific liveaboard diving where hammerheads gather around volcanic pinnacles
When To Go · Destination Guide
Remote Pacific liveaboard diving where hammerheads gather around volcanic pinnacles
When to go
Cocos Island is a year-round, liveaboard-only dive expedition rather than a short coastal outing.
Best overall window
All months are potentially operable when the operator has an authorized departure.
Outside that window
Crossings and exposed sites can feel rougher in this stretch.
Start with the overall answer, then switch only when scuba, freedive, snorkel, or topside timing changes the trip in a meaningful way.
The overall row stays visible so you can compare it against the currently selected scope.
| Scope | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall | Overall - Jan: Tradeoffs | Overall - Feb: Tradeoffs | Overall - Mar: Tradeoffs | Overall - Apr: Tradeoffs | Overall - May: Good | Overall - Jun: Tradeoffs | Overall - Jul: Tradeoffs | Overall - Aug: Tradeoffs | Overall - Sep: Tradeoffs | Overall - Oct: Tradeoffs | Overall - Nov: Tradeoffs | Overall - Dec: Good |
These do not replace the overall planner. Use them only if a specific animal or event is driving your trip dates.
Schooling scalloped hammerheads
Best for Scuba
Jun to Nov
An important draw during wetter, nutrient-rich months around Alcyone and Dirty Rock; numbers, depth, visibility and encounters vary.
Rays and other pelagic visitors
Best for Scuba
Check current season
Manta rays, eagle rays, dolphins and occasionally whale sharks may be seen on authorized scuba dives, but available sources do not support a reliable month-by-month guarantee for these species.
Rainforest and waterfall conditions
Best for Topside
May to Nov
Wetter conditions can produce active waterfalls and muddy or closed trails.
Built from climate references, access rules, and destination operators. Wildlife timing and route flexibility can shift year to year.