
By Global Travel Guide Editorial Team
The bay covers about 1,500 square kilometres and includes caves, floating villages and island beaches. Day trips from Hanoi are long; an overnight cruise gives time for kayaking and a cave visit. Cruises leave from Bai Chay or Tuan Chau, about 2.5 to 3 hours from Hanoi. The dry season from November to April has calmer water; summer brings storms and occasional cruise cancellations. Choose a cruise with a clear itinerary and check the boat's safety record.
The details official guides skip — save time, avoid crowds, and get better photos.
Choose an overnight cruise A day trip covers only a small part of the bay. Book a licensed overnight cruise, check the route and inclusions, and confirm pickup from Hanoi.
The bay has more than 1,600 limestone karst islands and islets rising from emerald water, and has been a UNESCO World Heritage Site since 1994. Many islands have caves and floating fishing villages.
An overnight cruise is worth it: day trips spend 4-5 hours in transit and only a short time on the water. Two days one night allows kayaking and a quieter morning.
October-April is drier and cooler, with better visibility; May-September is hotter and stormier, and some cruises are cancelled in typhoon season.