Scuba Diving in October

Year-round Red Sea diving from shore at budget prices, with the famous Blue Hole and a dedicated learning community that makes Dahab one of the world's top divemaster training destinations. Immediate deep-water access without a boat separates it from every other dive town on the Red Sea.

The USAT Liberty — a 120m US Army cargo ship torpedoed in 1942 — lies just 30m from shore in 5-30m of water, encrusted in coral and surrounded by reef life. It is the most accessible major wreck dive in the world, and one of the best macro sites in Bali for pygmy seahorses, ghost pipefish, and nudibranchs.

Self-reliant divers' paradise. Rent a truck, load tanks, drive to any of 86 marked sites around the island, and enter from shore — no boat, no schedule, no guide required. The marine park is among the most strictly enforced in the Caribbean, which means coral health far exceeds comparable destinations. Divers routinely do 3-4 dives a day at their own pace.

Mediterranean diving is a different proposition to tropical — cooler, clearer, and defined by geology and archaeology rather than reef life. Elounda's standout site is the partially submerged ancient city of Olous: wall remnants, column bases, and mosaic floors visible in 2-6m of crystalline water. Spinalonga island adds wall and wreck context. For divers who have done the tropical circuit, Mediterranean structure diving — with its underwater archaeology and dramatic limestone formations — offers a genuinely distinct perspective.

The world's most famous reef and still one of the most biologically rich. Day trips from Cairns reach the Outer Reef in 90 minutes — clownfish, giant clams, Maori wrasse, sea turtles, and reef sharks on every dive. Liveaboards push into the pristine Coral Sea for encounters that far exceed day-trip diving. The most accessible bucket-list dive destination for first-time divers.

Egypt's most developed resort dive hub, with well-organized operations and easy liveaboard access to the SS Thistlegorm — the world's most dived wreck. Ras Mohammed National Park is 20 minutes by boat and delivers consistent shark, turtle, and reef encounters.

The world's most reliably documented whale shark aggregation, with the Indian Ocean's highest density of resident manta rays. Small backpacker-diver community in a town that still feels genuinely off the beaten path, with dive operators who know these animals individually and run research-alongside-recreation programs.

Blue Corner is the most celebrated dive site in Micronesia. Hook into the wall in 1-3 knots of current and watch grey reef sharks, whitetips, barracuda, and Napoleon wrasse pass at eye level. Add the largest WWII wreck graveyard in the Pacific, Jellyfish Lake, and German Channel manta cleaning station — Palau is the most complete advanced dive destination in the Pacific.

More fish species and coral diversity than anywhere else on Earth — Raja Ampat consistently registers more species per dive than the next-closest destination. Even the snorkeling here surpasses most destinations' scuba diving. Remote West Papua archipelago that remains genuinely difficult to reach, which has preserved its reefs in near-pristine condition.

The world's premier destination for schooling hammerheads. No accommodation, no day visitors — liveaboard only, 36 hours offshore. The payoff is underwater encounters that have no equivalent in the Pacific: walls of hammerheads at Dirty Rock and Alcyone, whale sharks on almost every dive, silvertip and Galapagos sharks throughout. A UNESCO World Heritage Site with strict permit limits that keep it genuinely pristine.