Halong locates in the North Vietnam. The highest rainfall of this area occur from July to September, even until October. During this time Halong bay cruise sometime must be cancelled due to unexpected typhoon and storm. Every year, Vietnam faces 12 typhoons and storms, more or less. Almost happens from July to October. July , August and September are the months with highest rate of cancellation. It would be very disappointed to get cancellation. It’s a bad luck but it’s for the traveller safety. In case of cancellation, we always have plan B. If you still have some days to explore the North Vietnam, we can switch around by visiting another destination in the North of Vietnam first and visit Halong Bay later. Normally the storms and typhoon does not last longer than 3days . Or we can stay 1 night at hotel in Halong city, wait and hope for the day cruise which may be available next day. The worst case that your time does not allow to stay there long, some people accept to transfer to Halong city and just see Halong bay from the shore. It’s really bad luck but at least they know where Halong is and have a general ideas about Halong bay. We can also arrange the tour as an alternative to the surrounding area such as Mai chau and Ninh Binh.