Islands of Southern Vietnam: Top 5 coastal escapes

The islands in Southern Vietnam offer a range of coastal experiences, from tiny uninhabited islets with clear water to larger groups with historical sites and wildlife. This guide outlines five notable islands—Mong Tay, Nam Du, Hai Tac, Gam Ghi and Con Dao—covering location, main attractions and how to approach planning a visit.

What the islands in Southern Vietnam are

Southern Vietnam’s offshore islands span several clusters and provinces, each with distinct landscapes and scales. Some are small, sparsely populated islets reachable only by local boats; others form archipelagos with communities, services and a small tourism industry. Administratively, many of these islands fall within Kien Giang province or the Phu Quoc and Con Dao districts.

For reference: Mong Tay is part of the Kien Giang island chain to the south of Phu Quoc; Nam Du is an archipelago of 21 isles in Kien Giang province; Hai Tac sits off the Ha Tien coast; Gam Ghi belongs to the An Thoi group near Phu Quoc; and Con Dao is a separate island district with both natural and historic interest. Visitors report that conditions—from sea state to available facilities—vary widely between these spots, so planning per destination is important.

Highlights and key features of each island

Mong Tay is often described locally as a romantic, undeveloped isle. It lies within Duong Hoa commune in Kien Giang and sits to the south of Phu Quoc. The area is known for clear water and light-colored sand, with a marine floor that can be visible in shallow areas.

Nam Du is a collection of 21 inhabited and uninhabited islands in the southwest of Vietnam’s coastline, administered across An Son and Nam Du communes in Kien Hai district. The group includes smaller isles frequented by daytrippers and anglers; notable spots within the chain mentioned by visitors include Hon Ngang, Hon Mau, Hai Bo Dap and Bai Cay Men.

Hai Tac island lies under the jurisdiction of Tien Hai commune, Ha Tien district, Kien Giang province, and is located roughly 28 km from the mainland coast and about 40 km from Phu Quoc. There is a single main road on the island, and people often move around using motorcycles or short local fares. Some travelers hire small boats from the harbor to visit nearby rocks and islets.

Gam Ghi sits at the southern edge of the An Thoi archipelago in the Phu Quoc district. The shoreline features white sand beaches, unusual rock formations and concentrated coral growth close to the shore, where the reef structure is thick enough that snorkelers commonly see coral formations just below the surface.

Con Dao is an island district known for both its shoreline and cultural legacy. The archipelago supports diverse marine life and coral communities, and it provides opportunities for diving, fishing and wildlife observation. Within the Con Dao group, islands such as Bay Canh, Tre, Cau and Ba are often mentioned alongside attractions like Ong Dung forest and turtle nesting sites.

Practical tips for visiting the islands

Access and travel logistics differ by island. Nam Du is often reached via Rach Gia harbour; from there visitors take boats that typically require a two to three hour crossing. Those planning travel from major urban centers should allow time for land transfers to departure ports and expect sea conditions to affect schedules.

On Hai Tac, people commonly bring motorcycles to explore the main road, and short local motorcycle-taxi trips are available on the island; reported fares for such rides are around VND 50,000. Hiring a small boat from the island’s port for a loop around nearby formations is an option many visitors consider, with locally reported prices often falling in a mid-range bracket.

• Timing: Nam Du’s calmer seas tend to occur from late December through May, which many travellers prefer for island visits.
• Packing: bring reef-safe sunscreen, a basic first-aid kit, and a waterproof bag for electronics.
• Cash: ATMs and card services are limited on smaller islands; carry sufficient Vietnamese đồng for food, transport and small purchases.
• Local information: rely on local boat operators and community-run kiosks for up-to-date crossing schedules and weather advisories.

For travellers preparing entry documents, official application forms and the required supporting materials should be checked well ahead of departure. Practical guidance on completing visa paperwork can help avoid delays, so consult the visa application resources before travel.

Complete the visa application form

Local culture and environment

Coastal communities on these islands are typically small and rely on fishing, aquaculture and limited tourism for income. On islands with resident populations—such as parts of Nam Du—local markets, seafood stalls and modest guesthouses create a straightforward travel experience rather than a resort-style stay. Visitors often find opportunities to sample fresh seafood and to observe everyday island life.

Environmental sensitivity matters: several of the islands contain dense coral formations and nesting habitats for marine species. When swimming, snorkeling or boating, most guides recommend avoiding contact with reef structures and following local guidance for wildlife protection. In the Phu Quoc area, regional food products are part of the local identity; for instance, the island district is known for a specific fermented fish condiment that many travellers seek out for purchase or tasting.

Phu Quoc fish sauce

Who these islands suit

Each island appeals to different kinds of travellers. Small islets with little development attract visitors who prioritise quiet, Limited amenities and basic camping-style or day-trip experiences. Gam Ghi and Mong Tay may fit those who want a low-key shoreline and time in shallow, clear waters.

Nam Du is better suited to people seeking a multi-island experience where short boat hops let you visit several distinct locations within a single trip. Con Dao, with its combination of coastline, natural reserves and historical sites, often draws those interested in both outdoor activities and local history. Hai Tac is practical for travellers who want to explore by motorbike and sample rural island life with minimal crowds.

• Solo travellers who value simplicity: smaller, less serviced islets.
• Families or small groups: islands with basic guesthouses and shorter crossings.
• Snorkelers and divers: islands with dense reefs, especially around Gam Ghi and Con Dao.

Comparing the five islands

The table below summarises practical differences between the five destinations covered in this guide to help choose an island that matches your interests and trip length.

Frequently Asked Questions

When is the best time to visit Nam Du?

Most travellers find the sea calmer and conditions more favourable between late December and May, which many local operators recommend for island visits.

Can I bring a motorbike to Hai Tac?

Visitors report that it is possible to bring a motorcycle to Hai Tac and use the main road to get around. Local motorcycle taxis are also commonly used for short trips, with fares that have been cited by travellers in local currency terms.

Are there good snorkeling spots?

Yes: Gam Ghi is noted for dense coral close to shore, and Con Dao’s archipelago supports a range of dive and snorkel sites. As always, follow local guidance and avoid touching reef structures.

What activities are common on Con Dao?

Reported activities include scuba diving, fishing, nature walks (for example in Ong Dung forest), observing turtle nesting where permitted, and visiting neighbouring isles such as Bay Canh, Tre, Cau and Ba.

How should I prepare for limited services on smaller islands?

Bring sufficient cash, pack basic medical supplies and food or snacks if you expect limited dining options, and check boat schedules in advance. Local weather and sea conditions can change plans, so allow time and flexibility in itineraries.