
Great Blue Hole
Belize
A deep dive to about 30-40 m among stalactites under the overhangs, watching for nurse, Caribbean reef and blacktip sharks on the ascent.
- Experienced
- Blue hole
- Blacktip shark
Dark: peak season. Light: regularly seen.
| Destination | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MalapascuaPeak All year | ||||||||||||
| Aliwal Shoal & Protea BanksPeak May–Nov | ||||||||||||
| Cocos IslandPeak Jun–Dec | ||||||||||||
| Marsa Alam & the BrothersPeak Jun–Dec | ||||||||||||
| Southeast Florida (Palm Beach to Miami)Peak Nov–Apr | ||||||||||||
| BahamasPeak Oct–Mar | ||||||||||||
| Okinawa & YonaguniPeak Dec–May | ||||||||||||
| GalápagosPeak Jun–Oct | ||||||||||||
| Riviera Maya & CenotesPeak Nov–Mar | ||||||||||||
| AzoresPeak Jul–Oct | ||||||||||||
| Sharm El Sheikh & Ras MohammedPeak Jun–Sep | ||||||||||||
| Fakarava & RangiroaPeak Jan–Mar | ||||||||||||
| Socorro (Revillagigedo)Peak Jan–Mar | ||||||||||||
| Sodwana BayPeak Dec–Jan | ||||||||||||
| Cancún & Isla MujeresAll year | ||||||||||||
| Chuuk (Truk) LagoonAll year | ||||||||||||
| Kona (Big Island)All year | ||||||||||||
| MaldivesAll year | ||||||||||||
| PalauAll year | ||||||||||||
| Raja AmpatAll year | ||||||||||||
| CozumelNov–Mar | ||||||||||||
| Poor Knights IslandsMay–Sep | ||||||||||||
| Gulen (Western Norway)Jun–Aug | ||||||||||||
| KomodoJul–Sep | ||||||||||||
| Ningaloo ReefJun–Aug | ||||||||||||
| Plymouth & South CornwallJun–Aug | ||||||||||||
| Bohol & PanglaoFeb–Mar |
Sources confirm them, but don't say in which months.

Belize
A deep dive to about 30-40 m among stalactites under the overhangs, watching for nurse, Caribbean reef and blacktip sharks on the ascent.
Komodo, Indonesia
Tiny Central Komodo rock pinnacle with clouds of anthias, bigeye trevally and sweetlips, whitetips on the deeper slopes and common hawksbill turtles.

Bali & Nusa Penida, Indonesia
Mantas visit the cleaning stations here all year, sometimes in courtship 'manta trains' of up to 30.

Sharm El Sheikh & Ras Mohammed, Egypt
Ras Mohammed drift with sunlit swim-throughs at 5 and 15 m, then an alley of jackfish and whitetip reef sharks.
SS Yongala (Townsville), Australia
Sunk by a cyclone in March 1911, the wreck lies on a 30 m seabed with its upper parts at 16 m; penetration diving is prohibited by law.

Malapascua, Philippines
A plateau where thresher sharks rise at dawn to visit cleaning stations.
Dahab, Egypt
Walk-in shore dive where holes and cracks hide morays, nudibranchs and scorpionfish, with a school of yellowtail barracuda at 7 m.

Sipadan & Semporna, Malaysia
On Sipadan's north coast, divers can end up in the middle of a swirling vortex of chevron or blacktail barracuda.
Dahab, Egypt
Drop through the Bells chimney to a wall at about 25 m, then follow the wall to cross the 7 m saddle into the Blue Hole.
Aliwal Shoal & Protea Banks, South Africa
In raggie season up to 40 ragged-tooth sharks rest in this reef amphitheatre; in summer, look out for hammerheads above.
Palau
Hook in above the wall and watch resident grey and whitetip reef sharks, tuna and barracuda work the current.
Palau
Ride the channel current past lettuce coral grown 15–20 feet from the bottom, with grey reef sharks and batfish at the mouth.