A family from Hanoi discovered one of central Vietnam's most unusual coastal experiences this summer — an underwater meadow of golden sargassum seaweed swaying beneath clear water off Hon Kho island, near Quy Nhon city in Binh Dinh province. The phenomenon lasts roughly two and a half months each year, from mid-May to early August, and the family spent nearly four hours in the water on a single visit.
A Seasonal Window That Rewards Timing
The sargassum season at Hon Kho is short enough that missing it means waiting a full year. According to the Hanoi visitor, Nguyen Hong Nhat, June marks the peak, when the seaweed grows thickest and takes on the brightest golden hue. Morning departures — around 7:30 a.m. — offer the clearest water and the best light for seeing the seagrass beds illuminate below the surface. The limited window, combined with the untouched character of the site, is what distinguishes Hon Kho from Vietnam's many other beach destinations.
Getting There from Quy Nhon
The logistics are straightforward. From central Quy Nhon, the drive to Nhon Hai fishing village takes about 30 minutes, followed by a 15-minute canoe ride to the island itself. Staying in the village rather than a city hotel allows early morning departures and removes one logistical step from the day. Nhon Nhat's family paid around 500,000 VND per night for a two-bed homestay room — basic but clean, and staffed by locals who were notably hospitable.
What the Seagrass Looks Like Underwater
The visual effect below the surface surprised the family. Rather than a flat seabed, the sargassum forms a dense, swaying canopy that sunlight filters through, creating shifting patterns of yellow and green. Anh Nhat described it as "a golden forest under clear water" — a scene that bears little resemblance to the view from the surface. Live coral and small fish were visible throughout, adding to what the family described as an accessible but genuinely wild underwater environment. Children in the group refused to leave the water after almost four hours.
Tour Pricing and What It Covers
The all-inclusive tour package runs 250,000 VND per person — roughly $10 at current exchange rates. That covers canoe transfers, snorkel masks, life jackets, SUP boards, drinking water, fruit, a glass-bottom boat coral viewing session, and photography including drone footage. The family judged the price fair for the range of activities included. For context, comparable snorkeling tours at more developed sites like Phu Quoc or Nha Trang tend to run significantly higher, though the sargassum experience here has no real equivalent elsewhere in the region during this season.
Food and the Fishing Village Atmosphere
The Nhon Hai area adds a cultural dimension beyond the water. Local restaurants and roadside stalls served fresh seafood at low prices — the family of four ate well on about one million VND per day. A standout dish was tuna eyeball braised with traditional medicinal herbs, a local specialty not commonly found in tourist-focused restaurants. The slow pace of the fishing village provided a contrast to the more polished resort towns further along the central coast.
Protecting the Ecosystem
Guides ask visitors not to step on the seagrass or touch the coral, and the family followed those rules strictly. The sargassum beds and coral reef are interdependent, and damage to either can degrade the experience for future visitors. Anh Nhat noted that those who only photograph from a SUP board or stay on shore
