Halong Bay Climate
The bay is a sea islands in tropical wet with 2 seasons: hot and moist summer, dry and cold winter. Average temperature is from 15°C- 25°C. Annual rainfall is between 2000mm and 2200mm. Halong bay has the typical diurnal tide system (tide amplitude ranges from 3.5-4m). The salinity is from 31 to 34.5MT in dry season and lower in rainy season.
Best time to visit Halong Bay Vietnam
Best time to go to Ha Long Bay is all year round except winter as it is quite cold in the winter especially for swimming and the sky is not so clear for a good view of the bay. That means you can go there from April to October. Vietnamese often go there from May to August as this is the hot summer in Northern Vietnam and going to the beach side becomes such a nice experience.
However take a look at weather forecast is advisable because if it’s going to rain or worse a storm could spoil your visit there.
How to wear in Halong
When you kayaking: Paddle, life-jacket and dry bag are available. We recommend you to bring some extra gears such as Sun block, hat, anti-insect repellent, sunglasses, rain coat. The kayak tour with well-trained and experienced tour guide is always recommended for a best exploration.
When you getting into the caves and grottoes: Caves and grottoes are dry so wear what you are comfortable in. You will have to to take a short hike up steps to reach the caves so it is better if you wear comfortable walking shoes.
Last but not least, you should remember to wear clothes suites the weather. The cold season in Halong Bay is from October to April and the temperature is 10 – 15 degree. The hot season is from May to September with the temperature is 25 – 35 degree. And remember to wear particularly conservative clothing if you visit a culturally sensitive area such as a temple or pagoda – generally, the less bare skin the better and specifically, no shorts, dresses, skirts or tops with low neck lines and bare shoulders.
History of Halong Bay
Soi Nhụ culture (16000- 5000 BC)
Locating in Hạ Long and Bái Tử Long, there are symbolic archaeological site such as Mê Cung, Tiên Ông, Thiên Long. The remain relic major in mountain shellfishes (Cyclophorus) and spring shellfishes (Melania), some fresh water mollusc and some subdimentary labour tools. The main living procedure of Soi Nhụ's habitants are catching shells and fishes, collecting fruits and digging bulbs and roots. Their living environment is coastal area dislike other Vietnamese culture, for example: Hoà Bình, Bắc Sơn, etc. those days.
System of isles and caves
The bay consists of a dense cluster of 1,969 limestone monolithic islands, each topped with thick jungle vegetation, which rise spectacularly from the ocean. Several of the islands are hollow, with enormous caves. Hang Đầu Gỗ (Wooden stakes Cave) is the largest grotto in the Halong area. French tourists visited in the late 19th century, and named the cave Grotte des Merveilles. Its three large chambers contain large numerous stalactites and stalamites (as well as 19th century French graffiti). There are two bigger islands, Tuan Chau and Cat Ba, that have permanent inhabitants. Both of them have tourist facilities, including hotels and beaches. There are a number of wonderful beaches on the smaller islands.
Some of the islands support floating villages of fishermen, who ply the shallow waters for 200 species of fish and 450 different kinds of mollusks. Many of the islands have acquired their names as a result of interpretation of their unusual shapes: such names include Voi Islet (elephant), Ga Choi Islet (fighting cock), and Mai Nha Islet (roof). 989 of the islands have been given names. Birds and animals including bantams, antelopes, monkeys, and iguanas also live on some of the islands.
A community of around 1600 people live on Halong bay in 4 fishing villages: Cửa Vạn, Ba Hang, Cống Tàu and Vông Viêng in Hùng Thắng commune, Hạ Long city. They live on floating houses and are sustained by capture fishing and marine aquaculture (cultivating marine biota).
Originally in Ha Long Bay there was only one fishing village. Now there are about ten.
In 1962, Vietnam Ministry of Culture, Sport and Tourism arranged Halong Bay as National Renowned Lanscape Vestige.
The bay was World's Natural Heritage listed by UNESCO at the 18th meeting of the Committee of the World Heritages of UNESCO (in Phuket, Thailand on December 17th, 1994) for its outstanding universal aesthetic value according to the criteria (vii) explained in the Operational Guilined for the Implementation of the World Heritage Convention. On December 2nd, 2000 at the 24th meeting of Committee of the World Heritages in Cairns city, Queensland state, Australia, Halong bay was admitted as World's Natural Heritage extensively for its outstanding universal geological and geomorphological value according to the criteria (viii) of that Convention.
Halong bay was introduced to nominate by New Open World Foundation as World's 7 Natural Wonder having result on 08/08/2008.
Geology and Geomorphology
History of Tectonics
Scientist said that Halong bay has experienced at least 500 million years in various of ancient geographic condition such as orogeny, marine transgression andmarine regression. In Ordovician and Silurian period (500-410 million years ago), Halong bay is deep sea. In Carboniferous and Permian period (340-250 million years ago), Halong bay is at shallow sea level
Vietnam government is submiting Halong bay in three times in Vietnam's Tentative list to UNESCO for its outstanding universal biodiversity value. The bay includes 2 ecosystem: tropical moist evergreen rainforest ecosystem and marine and coastal ecosystem with 7 endemic species.
Tropical moist evergreen rainforest ecosystem
It said that there are 477 magnoliales, 12 pteris, 20 salt marsh flora and 4 amphibia, 10 reptilia, 40 aves, 4 mammalia in this ecosystem located in islands in Halong bay.