Lan Ha Bay Practical Tips & Local Advice
A little local knowledge goes a long way when traveling in northern Vietnam's maritime regions. Here are the essential tips on money, connectivity, seasickness, and cultural etiquette to ensure a smooth, worry-free trip.
Fact sheet
CurrencyVietnamese Dong (VND); cash is king on small boats
ATMsLocated in Cat Ba Town only; no ATMs on boats or piers
Mobile coverageViettel has the strongest 4G/5G signal across the bay
TippingAppreciated on cruises (50,000–100,000 VND/day per guest is customary)
Tap waterDo not drink tap water; use filtered/bottled water provided on boats
Short answer
Bring enough VND cash, buy an eSIM before arrival for reliable mobile data, take motion sickness medication if prone to nausea, and secure your belongings around monkeys.
Key tips for an effortless trip
- Prevent seasickness: Lan Ha Bay waters are mostly calm and sheltered by karst mountains. However, if you are prone to motion sickness, take a Dramamine or Cinnarizine tablet 30 minutes before boarding your boat.
- Get a local eSIM for maps and data: While cruise boats offer Wi-Fi, it can be patchy between high karst walls. Having a local Viettel eSIM ensures you maintain connectivity for weather alerts, messaging, and Google Maps.
- Cash is essential: ATMs in Cat Ba Town can run out of cash during busy holiday weekends. Always withdraw 1,000,000 to 2,000,000 VND before leaving Hanoi.
- Avoid single-use plastic: The Cat Ba Archipelago UNESCO zone has introduced strict bans on single-use plastic water bottles and plastic bags on cruise boats. Bring a reusable refillable water bottle.
Questions people ask
What medical facilities exist nearby?
There is a general district hospital in Cat Ba Town for minor injuries. For serious medical emergencies, patients are transferred by speedboat to modern international hospitals in Hai Phong or Hanoi.