Where to dive in October

The region's destinations, ranked on the monsoon season, the week's forecast, and how long it takes to get there from Singapore. Three separate signals — each card shows all three, because they often disagree.

← All sites

Best of October

1North Sulawesi — Lembeh and Bunaken
2,327km · 7h 24m each way · 34 sites on the map
Prime
A sheltered strait with no real off-season — one of the few places in the region you can book blind.
- · October is peak season here.
- · Every day of the next 7 looks diveable.
- · 2,327km — worth a week, not a weekend.
next 7 dayswater 30°C
Alung banua Bango Barracuda Point Batu Kapal Bualo
2Andaman and Nicobar Islands
1,668km · 6h 30m each way · 14 sites on the map
Good
India's side of the same sea, on the same southwest monsoon calendar.
- · No monsoon season this month.
- · Every day of the next 7 looks diveable.
- · 1,668km — worth a week, not a weekend.
next 7 dayswater 30°C
Dixon's Duncan's Wreck Guoddus Garden Jackson's Bar Johnny's Gorge
3Sabah and the Celebes Sea
1,665km · 6h 57m each way · 5 sites on the map
Good
Sipadan, Mabul and Layang Layang. Sheltered enough to dive most of the year, with one atoll that shuts completely.
- · No monsoon season this month.
- · Every day of the next 7 looks diveable.
- · 1,665km — worth a week, not a weekend.
next 7 dayswater 32°C
Lankayan - Jetty Dive Lankayan - Bimbo Rock Lankayan - Lankayan Wreck Lankayan - Malu Malu Lankayan - Sunnug Lair
4Komodo and the Lesser Sundas
2,058km · 6h 48m each way · 36 sites on the map
Good
Current is the defining feature here in every month. The season decides whether you can get out to the sites, not whether they are working.
- · No monsoon season this month.
- · Every day of the next 7 looks diveable.
- · 2,058km — worth a week, not a weekend.
next 7 dayswater 29°C
The Cauldron Dive Site 3 Sisters Batu Bolong Dive Site Batu Tiga Dive Site Bonsai dive site
5Bali and Nusa Penida
1,709km · 7h 45m each way · 89 sites on the map
Prime
Diveable every month of the year. What moves is the water temperature and the rain, not the access.
- · October is peak season here.
- · Nothing in the next 7 days looks comfortable.
- · 1,709km — worth a week, not a weekend.
next 7 dayswater 26°C
Manta Bay Ped Amed wall Bale Sampan Biorock Gili Divers Biorock
6Sri Lanka
2,777km · 9h 48m each way · 6 sites on the map
Good
Two coasts, two opposite seasons. The island always has one side working.
- · No monsoon season this month.
- · 6 of the next 7 days look diveable.
- · 2,777km — worth a week, not a weekend.
next 7 dayswater 29°C
Bar Reef Scuba Lanka Blue Water Dive Center sea horse Submarine Diving School
7Raja Ampat and West Papua
3,030km · 9h 33m each way · 100 sites on the map
Good
The best diving in the region and the narrowest window to reach it — the liveaboards physically leave for the southeast monsoon.
- · No monsoon season this month.
- · 2 of the next 7 days look diveable.
- · 3,030km — worth a week, not a weekend.
next 7 dayswater 27°C
Andiamo Dive Site Barracuda Rock Batu Dalam Boo east Boo Window
8The Great Barrier Reef and Coral Sea
5,003km · 16h 42m each way · 24 sites on the map
Prime
Southern hemisphere, so the calendar inverts: the good months are the ones that are cold at home.
- · October is peak season here.
- · Nothing in the next 7 days looks comfortable.
- · 5,003km — worth a week, not a weekend.
next 7 dayswater 25°C
Admiralty Anchorage Agincourt Reef No. 1 - Trigger Fish City Castle Challenger Bay Clipper
9East coast Peninsular Malaysia
521km · 5h 30m each way · 53 sites on the map
Marginal
The crew's home water, and the most seasonal of the lot: the northeast monsoon closes it outright for a third of the year.
- · Inter-monsoon squalls is blowing.
- · A short flight away.
Batu Layar Blue Lagoon D'Lagoon K.K Bay Kapal Polis
10The Maldives
3,377km · 8h 30m each way · 139 sites on the map
Marginal
Neither monsoon closes it. They swap which side of an atoll the mantas feed on, which is a choice rather than a problem.
- · Hulhangu — southwest monsoon is blowing.
- · 3,377km — worth a week, not a weekend.
Alimatha Jetty Broken rock Etheremadivaru house reef Five rocks Fotteyo Kandu
11Gulf of Thailand
1,064km · 5h 51m each way · 68 sites on the map
Monsoon
Koh Tao and its neighbours run on the opposite calendar to Phuket — the gulf is at its best while the Andaman side is shut.
- · Northeast monsoon is blowing.
- · A short flight away.
Ao Hin Ngam Ao Luek Ao Tanot Buoyancy Chumpon Pinnackle
12Vietnam
1,347km · 4h 54m each way · 6 sites on the map
Monsoon
Nha Trang and Con Dao. A short northeast monsoon that ends the season rather than dents it.
- · Northeast monsoon is blowing.
- · 1,347km — worth a week, not a weekend.
Angel Dive Snorkeling spot Hon Tai Turtle Dive Dive Center Searama Rainbow Divers
13The Philippines
2,027km · 9h 9m each way · 105 sites on the map
Monsoon
Two monsoons from opposite directions, so which coast you are on matters more than which month it is. Typhoons overlay both.
- · Habagat — southwest monsoon is blowing.
- · 2,027km — worth a week, not a weekend.
Biet Point Bogtong Bato Lapus-Lapus 2 Adrian's Cove Bonnie's place

Shut in October

Andaman Sea — Thailand and Myanmar
Mu Ko Similan and Mu Ko Surin national parks close to all visitors for the monsoon — a legal closure, so no operator can take you whatever the sea looks like. Richelieu Rock sits inside Surin and closes with it. The inshore sites around Phuket and Phi Phi stay open in reduced conditions.
Go instead: December, January, February, March, April.

Which week

Waning gibbous

72% lit · day 19 of the lunar month

Neap tides

Neap tides — the smallest range of the month, so the weakest currents. Easy conditions and usually the clearest water, though a drift site may barely drift.

New 10 Oct Full 26 Oct

Phase computed here, not fetched. This is the spring/neap cycle, which sets how hard the water moves — not a tide table: no free source publishes high and low water for Southeast Asian reefs, and the range peaks a day or two after the moon does, by an amount that varies with the coast. For times on the day, ask the operator.

Spring tides ahead

New moon10 Oct
Full moon26 Oct
New moon9 Nov

Book these weeks for current — Blue Corner, Sipadan's barracuda, anywhere the fish stack up in moving water. Avoid them for a training weekend or a photography trip, where you want the water still and clear.

How this is ranked

Destinations rather than individual sites, because forty markers around one island are one trip, not forty — and a list of the best thirty would be Tioman thirty times over.

Weighted 55% monsoon season, 30% the seven-day forecast, 15% how long it takes to get there. The season carries the most because it is the signal that closes a place outright; the forecast carries less because it knows about next Tuesday and your trip probably is not next Tuesday.

The moon is deliberately not in the score. It is the same moon everywhere, so it cannot separate one destination from another — it decides which week, not which place.

Season data is hand-written and calibrated against what operators actually do. Forecasts from Open-Meteo, sites from OpenStreetMap. A ranking is an opinion with its reasoning shown, not a fact — the operator you book with knows things this page does not.