Su Tu Bien Islet in Bai Tu Long Bay: Travel Guide, Activities, Costs & Eco-Tours

Su Tu Bien Islet, also known as Sea Lion Islet, is a captivating limestone formation in Bai Tu Long Bay, part of the UNESCO World Heritage Site near Halong Bay in Halong Region, Vietnam. Resembling a lion stretching out amidst the sea, this 15-meter-high karst is located along the scenic route to Thien Cung and Dau Go Grottoes, approximately 10 minutes by boat from Bai Chay Tourist Wharf. Unlike the busier Halong Bay, Bai Tu Long Bay, spanning 157.8 km², offers a tranquil escape with pristine beaches, clear waters, and cultural gems like Vung Vieng Fishing Village. Su Tu Bien Islet’s sea lion-like shape, formed over millions of years, adds to the bay’s imaginative “animal collection,” making it a must-see for nature lovers and photographers. Following Vietnam’s administrative restructuring, Ha Long City has transitioned into Halong Region, reinforcing its tourism prominence while prioritizing sustainability. Aligned with Quang Ninh’s “Green Tourism” initiative, Bai Tu Long Bay promotes eco-friendly exploration through regulated cruises and community-supported tourism. Legend Travel Group’s sustainable tours provide an authentic, responsible way to experience Su Tu Bien Islet—book your adventure via the links throughout this guide.

Legend Travel Group, a premier local tour operator, specializes in sustainable Southeast Asia journeys, emphasizing environmental and cultural preservation. Our Bai Tu Long Bay tours, including Su Tu Bien Islet visits, feature eco-friendly transport—electric boats, bamboo rowboats, and low-emission shuttles—guided by local experts who share the bay’s heritage. Supporting communities in Halong Region and Van Don, we align with Quang Ninh’s sustainability goals. With transparent pricing, free cancellations up to 48 hours before departure, and 24/7 support, we ensure a seamless experience. Contact us at sales@legendtravelgroup.com or WhatsApp +84825862222 to book eco-tours and explore Su Tu Bien Islet responsibly!

Vietnam’s administrative reorganization has integrated Ha Long City into Halong Region under Quang Ninh Province, streamlining access to Bai Tu Long Bay’s attractions, including Su Tu Bien Islet, Thien Cung Cave, and Vung Vieng Fishing Village. Supported by sustainable infrastructure—cycling paths, electric ferries, and a VND1.2 trillion coastal preservation project—Halong Region facilitates eco-conscious exploration, making Su Tu Bien Islet a key highlight in sustainable tourism itineraries.

Su Tu Bien Islet, nestled in Bai Tu Long Bay, is a year-round destination, with optimal times based on weather and crowd levels. The bay’s tropical monsoon climate influences visibility and activities around this sea lion-shaped karst.

• Autumn (September–November): Best Time. Cool and dry, 22–30°C (71.6–86°F), low humidity (70–75%), minimal rainfall (50–150 mm/month). November’s clear skies and fewer crowds offer perfect conditions for photographing Su Tu Bien Islet and cruising ($80–$200 or 2,000,000–5,000,000 VND). Ideal for kayaking ($10–$20 or 250,000–500,000 VND).

• Spring (March–May): Warm and pleasant, 20–28°C (68–82.4°F), moderate humidity (75–80%), low rainfall (<100 mm/month). Clear views of Su Tu Bien Islet’s lion-like form, but peak season crowds require early bookings ($100–$250 or 2,500,000–6,250,000 VND). Great for water activities.

• Winter (December–February): Cool and dry, 10–22°C (50–71.6°F), low humidity (65–70%), minimal rainfall (<30 mm/month). Occasional fog adds a mystical vibe to Su Tu Bien Islet, ideal for cultural cruises ($100–$250 or 2,500,000–6,250,000 VND). Book early for Christmas/New Year ($120–$300 or 3,000,000–7,500,000 VND).

• Summer (June–August): Hot and humid, 27–34°C (80.6–93.2°F), high humidity (80–90%), frequent showers (300–450 mm/month). Budget-friendly cruises ($60–$120 or 1,500,000–3,000,000 VND) offer clear Su Tu Bien Islet views between showers, but typhoon risks require weather checks.

Tip: Visit in October–November for optimal weather and serene views of Su Tu Bien Islet, included in our Bai Tu Long Bay Autumn Heritage ($100–$150).

Su Tu Bien Islet’s sea lion-like shape and scenic beauty make it a highlight of Bai Tu Long Bay cruises. Below are eco-friendly activities to enjoy nearby, emphasizing sustainable tourism:

• Eco-Cruise: Sail past Su Tu Bien Islet on an electric boat, capturing its lion-like silhouette against emerald waters ($80–$200 or 2,000,000–5,000,000 VND for 2D1N). Cruises often include Thien Cung Cave ($5 or 125,000 VND entry) and Dau Go Grotto, offering a low-impact exploration.

• Kayaking: Paddle around Su Tu Bien Islet and nearby karsts like Dua Islet for an up-close view of its unique form ($10–$20 or 250,000–500,000 VND). Ideal in calm autumn waters, this zero-emission activity enhances the experience.

• Photography: Capture Su Tu Bien Islet’s sea lion shape at sunrise or sunset, especially in November’s clear skies. Use a drone with cruise permission for aerial shots or shoot from the cruise deck for stunning perspectives.

• Bamboo Boat Tours: Visit Vung Vieng Fishing Village, 20 km from Su Tu Bien Islet, to explore floating communities with local rowers ($5–$10 or 125,000–250,000 VND), supporting community-based tourism.

• Squid Fishing: Try eco-friendly night fishing near Su Tu Bien Islet, a cultural activity included in select cruises, using sustainable methods to engage with marine life.

• Cooking Classes: Learn to prepare Vietnamese dishes like banh gat gu onboard ($15–$25 or 375,000–625,000 VND), complementing the cruise with local culinary immersion.

Tip: Opt for a 2D1N or 3D2N eco-cruise to combine Su Tu Bien Islet views with multiple activities, included in our Bai Tu Long Bay Explorer ($95–$140).

Su Tu Bien Islet, located near Thien Cung and Dau Go Grottoes in Bai Tu Long Bay, is accessible only by boat, typically via eco-friendly cruises departing from Hon Gai or Van Don ports, 180 km from Hanoi. Below are sustainable transportation options to reach the ports and cruise to Su Tu Bien Islet, including costs and travel times.

1. Eco-Cruise with Included Transfers (Most Convenient)

• Description: Most Bai Tu Long Bay cruises include round-trip transfers from Hanoi to Hon Gai or Van Don ports via low-emission limousines or shuttles, docking near Su Tu Bien Islet during the itinerary. Operators like Indochina Junk use electric boats for sustainability.

• Travel Time: 2.5–3.5 hours (Hanoi to port) + cruise duration (2D1N or 3D2N, passing Su Tu Bien Islet on day 1 or 2).

• Cost: $80–$200 (2,000,000–5,000,000 VND) for 2D1N; $120–$350 (3,000,000–8,750,000 VND) for 3D2N, including transfers, meals, and activities.

• Departure Points: Hanoi Old Quarter or your hotel to Hon Gai/Van Don ports, then cruise to Su Tu Bien Islet.

• Sustainability: Electric boats and waste-reduction practices align with UNESCO conservation goals.

• How to Book: Reserve through Legend Travel Group for trusted operators like Dragon Legend or Swan Cruises.

• Tip: Choose cruises with Su Tu Bien Islet on the itinerary, included in our Bai Tu Long Bay Eco-Cruise ($95–$140).

2. Shuttle Bus to Port

• Description: Air-conditioned shuttle buses (e.g., Hoang Khoi Limousine) offer shared rides from Hanoi to Hon Gai or Van Don ports, where cruises to Su Tu Bien Islet depart. Fuel-efficient fleets reduce emissions.

• Travel Time: 2.5–3 hours, with a 15-minute rest stop.

• Cost: $10–$15 (250,000–375,000 VND) one-way per person.

• Departure Points: Hanoi Old Quarter (My Dinh or Gia Lam stations) to Hon Gai/Van Don ports.

• Sustainability: Shared transport lowers carbon footprints.

• How to Book: Book via Legend Travel Group or platforms like 12Go.

• Tip: Align bus arrival with cruise schedules (10:00 AM–12:00 PM), included in our Bai Tu Long Bay Discovery Tour ($90–$130).

3. Private Car or Limousine

• Description: Private cars or limousines (e.g., Indochina Go) provide door-to-door service from Hanoi to Hon Gai/Van Don ports, ideal for groups. Hybrid vehicles are available for eco-travel.

• Travel Time: 2.5 hours via 5B Highway.

• Cost: $50–$80 (1,250,000–2,000,000 VND) one-way for a 4-seater; $80–$120 (2,000,000–3,000,000 VND) for a 9-seater.

• Departure Points: Hanoi Old Quarter, Noi Bai Airport, or your hotel to Hon Gai/Van Don ports.

• Sustainability: Request hybrid vehicles to reduce emissions.

• How to Book: Arrange through Legend Travel Group or trusted providers.

• Tip: Customize eco-friendly stops en route, included in our Bai Tu Long Bay Heritage Cruise ($100–$150).

4. Seaplane (Luxury Option)

• Description: Hai Au Aviation’s seaplane flights from Noi Bai Airport to Tuan Chau Marina offer aerial views of Bai Tu Long Bay, followed by a transfer (30 minutes, $5–$10 or 125,000–250,000 VND) to Hon Gai/Van Don ports for cruises to Su Tu Bien Islet.

• Travel Time: 45 minutes (flight) + 30 minutes (transfer), totaling ~1.5 hours.

• Cost: $400 (10,000,000 VND) one-way per person.

• Departure Points: Noi Bai Airport to Tuan Chau Marina, then Hon Gai/Van Don ports.

• Sustainability: Low per-passenger emissions for short flights.

• How to Book: Reserve via Hai Au Aviation or Legend Travel Group’s luxury packages.

• Tip: Book early for peak seasons, included in our Bai Tu Long Bay Luxury Tour ($250–$400).

To ensure a comfortable and eco-friendly visit to Su Tu Bien Islet, pack thoughtfully based on the season and cruise activities:

• Clothing:

  • Spring/Autumn (March–May, September–November): Lightweight, breathable clothing (t-shirts, shorts, long pants for cultural sites), a light jacket for cooler evenings, and water shoes for kayaking.

  • Summer (June–August): Swimsuits, quick-dry clothing, sandals, and a hat for sun protection.

  • Winter (December–February): Warm layers (sweaters, fleece), a waterproof jacket, scarf, and closed-toe shoes for cooler, foggy days.

• Sun Protection: SPF 50+ sunscreen ($3–$7 or 75,000–175,000 VND), sunglasses, and a wide-brimmed hat to shield against UV rays.

• Rain Gear (Summer): Lightweight raincoat ($2–$5 or 50,000–125,000 VND), waterproof bag, and umbrella for brief showers.

• Eco-Friendly Essentials: Reusable water bottle ($0.50 or 12,500 VND), biodegradable toiletries, and a reusable tote to minimize plastic waste.

• Activity Gear:

  • Kayaking/Photography: Dry bag for electronics, quick-dry towel, and a camera or smartphone with a waterproof case ($5–$10 or 125,000–250,000 VND).

  • Cruising: Binoculars for distant karst views and a small backpack for essentials.

• Cultural Respect: Modest clothing (long pants, covered shoulders) for nearby fishing villages like Vung Vieng.

• Miscellaneous: Power bank, offline maps (Maps.me), and a small first-aid kit.

Tip: Pack light to reduce your environmental footprint, included in our Bai Tu Long Bay Eco-Cruise ($95–$140).

Visiting Su Tu Bien Islet is typically part of a Bai Tu Long Bay cruise, with costs covering transportation, activities, and onboard amenities. Below are approximate expenses for an eco-conscious trip:

• Transportation:

  • Shuttle Bus: $10–$15 (250,000–375,000 VND) one-way.

  • Private Car/Limousine: $50–$120 (1,250,000–3,000,000 VND) one-way for 2–4 people.

  • Seaplane: $400 (10,000,000 VND) one-way.

  • Eco-Cruise with Transfers: $80–$200 (2,000,000–5,000,000 VND) for 2D1N; $120–$350 (3,000,000–8,750,000 VND) for 3D2N.

• Accommodation (if not on a cruise):

  • Homestays: $10–$25/night (250,000–625,000 VND), e.g., Van Don Homestay.

  • Budget Hotels: $15–$30/night (375,000–750,000 VND).

  • Mid-Range Hotels: $30–$80/night (750,000–2,000,000 VND).

• Activities:

  • Kayaking near Su Tu Bien Islet: $10–$20 (250,000–500,000 VND).

  • Bamboo Boat Tour (Vung Vieng): $5–$10 (125,000–250,000 VND).

  • Cooking Class: $15–$25 (375,000–625,000 VND).

  • Cave Entry (e.g., Thien Cung): $5 (125,000 VND).

• Food and Drinks (if not included in cruise):

  • Street Food (e.g., Bánh Gật Gù): $1–$3 (25,000–75,000 VND).

  • Restaurant Meals: $5–$15 (125,000–375,000 VND).

  • Bottled Water/Coconut Juice: $0.50–$1 (12,500–25,000 VND).

• Total Daily Budget (per person, excluding cruise):

  • Budget Traveler: $25–$40 (625,000–1,000,000 VND).

  • Mid-Range Traveler: $50–$100 (1,250,000–2,500,000 VND).

  • Luxury Traveler: $150–$400 (3,750,000–10,000,000 VND).

Tip: Choose a cruise package for all-inclusive pricing, included in our Bai Tu Long Bay Eco-Tour ($95–$140).

• Book Early: Reserve eco-tours via Legend Travel Group 1–2 months in advance for peak seasons (September–November, March–May) or festive periods like Christmas to secure preferred dates and eco-friendly boats.

• Sustainability: Select cruises with eco-certifications (e.g., Indochina Junk) to minimize environmental impact; support local vendors at Vung Vieng to align with Quang Ninh’s green goals.

• Navigation: Download offline maps (Maps.me) for Halong Region, Van Don, and Hon Gai; save Hon Gai Port as a landmark for cruise departures.

• Safety: Secure valuables on cruises; wear life jackets while kayaking; check summer forecasts for typhoons (June–August).

• Cultural Respect: Dress modestly for cultural visits to nearby fishing villages (long pants, covered shoulders); say “cảm ơn” (thank you).

• Health: Stay hydrated with bottled water ($0.50 or 12,500 VND); apply mosquito repellent ($2–$5 or 50,000–125,000 VND) for outdoor activities.

Our sustainable tours include Su Tu Bien Islet visits, tailored to Bai Tu Long Bay’s serene climate and attractions, with eco-friendly transportation from Hanoi:

• Bai Tu Long Bay Explorer (2D1N, $95–$140/person): Overnight cruise past Su Tu Bien Islet, Thien Cung Cave, and Vung Vieng Fishing Village with kayaking and limousine transfers. Includes guide, meals, and eco-transfers.

• Bai Tu Long Bay Immersion (3D2N, $150–$300/person): Two-night cruise to Su Tu Bien Islet, Ba Mun Island, and Minh Chau Beach with bamboo boat tours. Includes guide, meals, and eco-transfers.

• Bai Tu Long Bay Foodie Cruise (2D1N, $85–$120/person): Seafood tasting, cooking class, and Halong Night Market visit, cruising past Su Tu Bien Islet with shuttle bus transfers. Includes eco-transfers, meals, and guide.

• Bai Tu Long Bay Heritage Cruise (2D1N, $100–$150/person): Su Tu Bien Islet, Vung Vieng Fishing Village, and squid fishing with private car transfers. Includes lunch and guide.

• Bai Tu Long Bay Discovery (2D1N, $90–$130/person): Quan Lan Island cycling, Tuan Chau cultural shows, and Su Tu Bien Islet views with eco-transfers. Includes snacks and guide.

• Bai Tu Long Bay Luxury Tour (3D2N, $250–$400/person): Seaplane transfer, luxury cruise past Su Tu Bien Islet, and Ba Mun rainforest hike. Includes meals and guide.

Prices include English-speaking guides, eco-transfers, and entrance fees. Enjoy 10% off for groups of 8+ or seasonal promotions. Book now via links around this page!

Su Tu Bien Islet, a sea lion-shaped karst in Bai Tu Long Bay, offers a unique glimpse into Vietnam’s geological wonders, best explored via eco-friendly cruises from Hanoi. With optimal visiting times in autumn (September–November) and spring (March–May), activities like kayaking, photography, and cultural tours enhance the experience. Legend Travel Group’s Bai Tu Long Bay Tours guide you through this striking landmark, ensuring a sustainable Bai Tu Long Bay Travel experience featuring seamless transportation and eco-conscious practices. Don’t wait—browse our curated eco-tours and book your Bai Tu Long Bay adventure today!
Ready to cruise past Su Tu Bien Islet’s striking silhouette? Reserve your eco-tour with Legend Travel Group and immerse yourself in Vietnam’s coastal treasure!

Author Bio: Written by Tony Bùi, with over 20 years of experience in the travel industry, guiding 100,000+ travellers across Southeast Asia. This guide draws from firsthand insights, guest feedback from Legend Travel Group surveys.

Sources: By Tony Bùi at Legend Travel Group