What is the best time to dive Mergui Archipelago?

The best months to dive Mergui Archipelago in Myanmar are November, December, January, February, March, April. Water temperatures range from 26°C to 30°C during peak season.

How deep is Mergui Archipelago?

Mergui Archipelago reaches a maximum depth of 40 m, with visibility ranging from 10–30 m. The full depth range requires Advanced certification at minimum; some zones are technical diver territory.

What marine life can you see at Mergui Archipelago?

Mergui Archipelago is known for encounters with manta ray, whale shark, dugong, harlequin shrimp, frogfish, sea fan garden. The site features reef, wall, pelagic, macro diving across 40 named sites, with a marine life score of 78/100 in OkToDive's ranking.

Is Mergui Archipelago good for beginners?

Mergui Archipelago is better suited to experienced divers. Currents can be moderate and depths reach 40 m. A minimum Advanced Open Water certification is required, and OkToDive recommends at least 100 logged dives before visiting.

How much does it cost to dive Mergui Archipelago?

A 2-tank dive at Mergui Archipelago averages around $180 USD, placing it in the mid range tier. Most diving here is done via liveaboard, so factor in multi-day packages when budgeting.

Mergui Archipelago Diving — Myanmar's Last Frontier

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World Class

Advanced

Mergui Archipelago

MyanmarAndaman Sea

66.4

SCORE

11.5000°N

98.0000°E

The Mergui Archipelago is a chain of 800 largely uninhabited islands in Myanmar's Andaman Sea, home to the Moken sea nomads and some of Southeast Asia's most remote reefs. Accessible only by liveaboard from Kawthaung or Ranong (Thailand), the diving features black rock pinnacles draped in sea fans, macro critters galore, and encounters with mantas and whale sharks in season.

Myanmar's Untouched Island Wilderness

Visibility10–30 m

Temperature26–30°C

Max Depth40 m

Currentmoderate

2-Tank Dive$180

Best MonthsNovember, December, January, February

CertificationAdvanced Open WaterAdvanced

Score breakdown

Click any score to see a detailed breakdown

Marine Life

78.0

Species diversity, megafauna encounters, reef fish abundance, macro life, and endemic species.

Species Diversity

Megafauna Encounters

Reef Fish Abundance

Macro Life

Endemic Species

Marine life diversity

78.0

Coral & reef health

75.0

Visibility & conditions

65.0

Dive site variety

72.0

Water temperature

85.0

Depth & access

68.0

Operator quality

72.0

Topside experience

35.0

Getting there

35.0

Value & cost

58.0

Crowding

92.0

Social proof

62.0

Key species

manta ray whale shark dugong harlequin shrimp frogfish sea fan garden

Dive types

reefwallpelagicmacro

Traveling with non-divers?

This destination is primarily accessed by liveaboard — not ideal for non-diving partners. Consider planning separate shore-based activities before or after your liveaboard trip.

Activities for non-divers

island explorationMoken village visitskayakingsnorkeling

Nearby cultural sites

Moken sea nomad villages

Non-diver score

3/10

Dedicated dive destination — not ideal for non-divers.

Family FriendlyNot recommended

Restaurants & Nightlifenone

Safety & emergency

Dive insurance

DAN recommends dive insurance for all divers.

Learn more at DAN.org

Hyperbaric Chamber300 km — Bangkok Hospital Hyperbaric Unit (via Ranong)

Nearest Hospital200 km

No medical facilities in the archipelago; evacuation to Kawthaung or Ranong (Thailand) — liveaboard carries emergency O2; DAN coverage mandatory

Skill LevelAdvanced

Current Strengthmoderate

Top operators

Burma Boating Liveaboards

PADI

4.7

100 reviewsNITROX

Compare this dive site

Mergui Archipelago in Myanmar scores 66.4/100in OkToDive's 12-category data-driven rating. Best for reef diving with 10–30m visibility and 26–30°C water temps. A 2-tank dive costs ~$180 USD. Peak season: November, December, January.

Last updated: 2026-05-25

Who should dive here

Best for

+ Macro photographers hunting critters
+ Dedicated divers willing to commit to a liveaboard trip
+ Groups seeking 40+ named dive sites in one area

Skip if

− You don't have Advanced certification
− You get seasick or prefer shore-based diving

Verdict

Choose Mergui Archipelago over similar Andaman Sea destinations when crowding matters more than getting there

Honest reality check

What your dive shop won't tell you

The minimum certification printed on a brochure is the legal floor, not the honest recommendation. Here's what we actually think you should bring to this site.

Recommended logged dives

50+

Below this we'd send you somewhere easier first.

Recommended certification

Advanced Open Water

“Intermediate minimum — deep profiles and variable viz.”

What will challenge you

→Moderate currents. Expect to drift — this is not a skill-builder site for a first trip after certification.
→Recreational limit of 40 m is reachable here (max depth 40 m). Gas planning and NDL tracking matter.
→Liveaboard only. Self-sufficiency matters — you're far from dive medical support.
→Nearest hyperbaric chamber is ~300 km away. Evacuation is slow. Dive conservative profiles and get DAN insurance before you fly.

What will surprise you

→You'll do 3–4 dives a day for a week straight. Fitness and sleep discipline matter more than your certification level.
→Thermoclines can drop water temp by 4°C between the surface and depth. Your wetsuit choice should match the minimum, not the average.
→Permit-restricted access. Book 6+ months ahead through a licensed operator.

Time of day

When to dive it

Every dive shop gives you this briefing at 7am. We just wrote it down. Tidal dependency: slight. Optimal window: First light to 11am for best visibility..

Morning

Viz
high
Current
moderate
Crowd
light

reef exploration
photography

Best light and calmest conditions before afternoon wind picks up.

Afternoon

Viz
moderate
Current
moderate
Crowd
moderate

drift diving
second tank

Wind chop can reduce viz. Still diveable but morning is better.

Month-by-month

Dive forecast

Realistic conditions by month. Viz ranges are what you should actually expect, not best-case marketing numbers. Confidence % is the share of days that match this profile historically.

Month	Viz (m)	Temp (°C)	Current	Sea	Rain	Confidence	Highlights
Jan	10–20	26	Mod	Mod	Light	70%	reef fish active, peak season crowds
Feb	10–20	26	Mod	Mod	Light	70%	reef fish active, peak season crowds
Mar	10–20	26	Mod	Mod	Light	70%	reef fish active, peak season crowds
Apr	10–20	26	Mod	Mod	Light	70%	reef fish active
May	24–30	30	Mod	Calm	Dry	70%	reef fish active
Jun	24–30	30	Mod	Calm	Dry	70%	reef fish active
Jul	24–30	30	Mod	Calm	Dry	70%	reef fish active
Aug	24–30	30	Mod	Calm	Dry	70%	reef fish active
Sep	24–30	30	Mod	Calm	Dry	70%	reef fish active
Oct	10–20	26	Mod	Mod	Light	70%	reef fish active
Nov	10–20	26	Mod	Mod	Light	70%	reef fish active
Dec	10–20	26	Mod	Mod	Light	70%	reef fish active

Shoot here

Photography brief

Subjects are only half the shot. A perfect macro site is useless in a three-knot drift, and a wide-angle dream is useless at 35 m with a murky ceiling. These are the conditions, not the hype.

Macro subjects78

Wide angle83

Viz stability58

Hover friendliness70

Natural light46

Recommended kit

→Macro lens (60mm or 105mm), focus light, dual strobes positioned for fill
→Wide-angle or fisheye (8-15mm range), dual strobes for close-focus wide angle

Level up here

What this site will teach you

The dives that made you a better diver are the ones that made you uncomfortable for the right reasons. Here's what this site will quietly train you for.

Deep diving comfort
advanced
Regular dives past 30m build confidence at depth.
Buoyancy precision
intermediate
Macro subjects demand millimeter-level hover control.

What it costsEstimates — calibration pending

7-day trip, per person

Rough ranges anchored to existing regional data — not booking quotes. This is a liveaboard destination, so the dive package rolls accommodation and food into one nightly rate.

Budget

$3,550–$4,400

Hostels, shore diving, cheap eats

Flights (RT from US): $720–$880
Diving / day: $380–$450
Transfers + misc: $150–$380

Mid-range

$4,450–$5,900

3-star hotels, standard boat ops, mix of restaurants

Flights (RT from US): $1,150–$1,450
Diving / day: $450–$580
Transfers + misc: $150–$380

Splurge

$6,000–$8,050

Top resorts or liveaboards, premium operators

Flights (RT from US): $1,800–$2,200
Diving / day: $580–$780
Transfers + misc: $150–$380

Budget decision guide

Choose Budget if you prioritize dive count over comfort — hostels and shore diving maximize bottom time per dollar. Choose Mid-range for the best balance of comfort and value — most divers land here. Choose Splurge for premium operators, private guides, and top-tier accommodation — worth it for special trips or non-diving partners.

Flights priced round-trip from a major US hub. Figures are per person on a shared room. Solo travelers add ~30% to accommodation.

Best dive types here