Where to dive in September 2026
In season this month: 54 curated locations, 6 bucket-list encounters and the top dive sites where September’s conditions and wildlife align. Rankings come from documented seasonality and operator continuity — not marketing calendars.
In-season locations
Aliwal Shoal
South Africa
Aqaba
Jordan
Beqa Lagoon
Fiji
Bloody Bay Wall
Cayman Islands
Bonaire National Marine Park
Bonaire
Bonegi Wrecks
Solomon Islands
Brothers Islands
Egypt
Bunaken
Indonesia
Capo Carbonara
Italy
Channel Islands
United States
Cocos Island
Costa Rica
Cod Hole
Australia
Darwin Island
Ecuador
Daymaniyat Islands
Oman
Fernando de Noronha
Brazil
Florida Keys
United States
Gozo
Malta
Great White Wall
Fiji
Green Island
Taiwan
Jeju Island
South Korea
Kimbe Bay
Papua New Guinea
Koh Tao
Thailand
Komodo National Park
Indonesia
Kona Coast
United States
Kornati National Park
Croatia
La Restinga
Spain
Larnaca
Cyprus
Mabul
Malaysia
Malpelo Island
Colombia
Medes Islands
Spain
Milne Bay
Papua New Guinea
Mitsamiouli
Comoros
Mnemba Atoll
Tanzania
Niue Reef
Niue
Nosy Be
Madagascar
Ogasawara
Japan
Osprey Reef
Australia
Ras Mohammed
Egypt
Santa Maria
Portugal
Sanya
China
São Tomé North Coast
São Tomé and Príncipe
Silfra Fissure
Iceland
Sipadan
Malaysia
Sodwana Bay
South Africa
South Pass
French Polynesia
SS President Coolidge
Vanuatu
Stingray City
Cayman Islands
Tiputa Pass
French Polynesia
Tofo
Mozambique
Trincomalee
Sri Lanka
Tulamben
Indonesia
Vis Island
Croatia
Westpunt
Curaçao
Wolf Island
Ecuador
In-season encounters
Filter by certification
Thermal stress this month
Some reefs are currently under NOAA Coral Reef Watch bleaching alert. If you’re flexible, skip stressed reefs and steer toward locations whose latest survey looks better. See in-season sites with current reef condition →
Methodology
How we picked “in season”
A location, encounter or site is “in season” for September when its curated bestMonths array includes month 9. Best-months come from operator calendars, climatological reanalysis, and (where applicable) the sighting-occurrence-cluster methodology for species. Reef condition framing follows reef-health-aims-noaa.