Mergui Archipelago Islands

Remote southern islands with coral reefs and biodiversity

The Mergui Archipelago comprises hundreds of Andaman Sea islands with coral reefs, remote beaches and Moken seafaring communities; diving, liveaboards and village visits are common activities.

Admiralty Chart No 216a Mergui Archiplelago Northern Part, Published 1830, New Edition 1938.jpg
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Mergui Archipelago at a Glance#

About Mergui Archipelago#

The Mergui Archipelago is a vast group of more than 800 islands in the Andaman Sea off southern Myanmar’s Tanintharyi coast, known for remote beaches, coral reefs, and largely unspoiled marine environments. Islands range from forested granite outcrops to sandy islets and include a mix of inhabited and uninhabited sites.

Many visitors come for snorkelling, diving, and liveaboard cruises that explore reef systems, seagrass beds, and submerged pinnacles; boat trips also visit remote beaches and small island communities. A small number of islands are inhabited by the Moken people, a maritime population with traditional seafaring lifestyles, and some itineraries include cultural visits where permitted.

Modern charting and limited infrastructure mean travel is typically by boat from southern ports; services are seasonal and often run from regional hubs during the calmer months. The archipelago’s islands have seen intermittent contact with traders and colonial powers but remain sparsely developed compared with better-known tourist archipelagoes.

Geographically the islands lie off Myanmar’s Tanintharyi Region in the far south of the country, scattered across the Andaman Sea and separated from the Thai-Malaysian marine area to the southeast; the nearest mainland access points are coastal towns in Tanintharyi Region.

  • Scale and activities: The archipelago comprises more than 800 islands, many of them uninhabited and fringed by coral reefs, making it a major site for diving and liveaboard cruises.
  • Seasonality: Best visiting season is generally the dry months when sea conditions are calmer and access from the mainland is more reliable.

How to Get to Mergui Archipelago#

The Mergui (Myeik) Archipelago is accessed by sea from the port town of Myeik (Mergui) in Tanintharyi Region. Regular passenger and charter boats, dive liveaboards and private charters depart Myeik for islands in the archipelago; Myeik itself is reached by domestic flight or road from other parts of southern Myanmar. There are no road connections directly into the archipelago - all access is by boat.

Tips for Visiting Mergui Archipelago#

  • Visit during the dry season (roughly November-April) when sea conditions are calmer and snorkeling/diving visibility is best; many operators run seasonal schedules.
  • Book a multi-day trip with a reputable Mergui operator out of Kawthaung or Myeik so logistics, fuel and island landing permissions are handled-independent island-hopping is impractical due to distance and limited services.
  • Plan your itinerary around specific activities (snorkel/dives, island hikes, Moken village visits) and confirm what's included-many visitors miss prime snorkeling sites if they don't specify dive/snorkel stops in advance.

Best Time to Visit Mergui Archipelago#

Best to visit the Mergui Archipelago in the dry season (November-April) for calm seas and the best diving and sailing conditions.

Dry season
November-April · 24-32°C
Calm seas, better visibility for diving and snorkeling, and the main window for liveaboard and island-hopping trips.
Monsoon season
May-October · 24-30°C
Rougher seas, heavier rain and many tour operators reduce services or suspend trips - not ideal for boating or diving.

Weather & Climate near Mergui Archipelago#

Climate

Mergui Archipelago's climate is classified as Tropical Monsoon - Tropical Monsoon climate with consistently warm temperatures year-round. Temperatures range from 21°C to 32°C. Heavy rainfall (4897 mm/year), wettest in August with a pronounced dry season.

Air Quality: AQI 63 Moderate
Best Time to Visit
JanuaryFebruaryDecember
Temperature & Rainfall
Temperature Range
34°
Warmest Month
22°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Ideal 21° - 30° 25° 6 mm some cloud 75% 1.7 m/s 1.8 very high 11.4h
February Excellent 21° - 30° 26° 33 mm some cloud 74% 1.7 m/s 2.1 extreme 11.7h
March Excellent 22° - 31° 27° 74 mm some cloud 75% 2.4 m/s 2.3 extreme 12.0h
April Good 23° - 32° 30° 133 mm partly cloudy 76% 2.3 m/s 2.4 extreme 12.3h
May Good 23° - 30° 27° 501 mm overcast 81% 1.7 m/s 1.9 very high 12.5h
June Good 23° - 29° 26° 955 mm overcast 84% 2.0 m/s 1.7 very high 12.7h
July Good 22° - 28° 25° 1006 mm overcast 84% 1.8 m/s 1.7 very high 12.6h
August Good 22° - 28° 25° 1030 mm overcast 85% 1.8 m/s 1.7 very high 12.4h
September Good 22° - 28° 25° 729 mm overcast 85% 1.4 m/s 1.8 very high 12.1h
October Good 22° - 29° 26° 323 mm overcast 83% 1.7 m/s 1.8 very high 11.8h
November Very Good 22° - 29° 26° 85 mm partly cloudy 80% 2.2 m/s 1.8 very high 11.5h
December Excellent 21° - 29° 25° 22 mm partly cloudy 77% 2.4 m/s 1.7 very high 11.3h