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The average temperature is from 15–25 °C (59–77 °F), and annual rainfall is between 2 and 2.2 metres (6.6 and 7.2 ft). Hạ Long Bay has the typical diurnal tide system (tide amplitude ranges from 3.5–4 metres or 11–13 feet). The salinity is from 31 to 34.5MT in the dry season and lower in the rainy season.
Weather. 24/7 Help. ... including white-water rafting, night hikes through the jungle, camping, and ziplining. ... I explored the city before sleeping a few nights on a houseboat in Halong Bay.
Cát Bà Island is the largest of the 367 islands spanning 262.41 km 2 (101.32 sq mi) [1] [a] that comprise the Cat Ba Archipelago, which makes up the southeastern edge of Lan Ha Bay in Northern Vietnam and maintains the dramatic and rugged features of Ha Long Bay.
The ocean temperature plays a crucial role in the global climate system, ocean currents and for marine habitats. It varies depending on depth, geographical location and season. Not only does the temperature differ in seawater, so does the salinity. Warm surface water is generally saltier than the cooler deep or polar waters. [1]
Quảng Ninh's sea borders upon the Gulf of Bắc Bộ. It is large and protected by the ranks of islands, so the wind is quieter and the water smoother. The gulf's current runs from north to south. It is Vietnam's coldest sea, with the temperature sometimes dipping below 13 °C. The average tide level recorded is 2.5 m. [7] [8]
The highest temperature ever recorded in Vietnam was 44,2.C, which was recorded in Tương Dương district, Nghệ An Province on 7 May, 2023. [24] The coldest temperature recorded in Vietnam was −6.1 °C (21.0 °F) in Sa Pa on 4 January 1974. [25]
Hạ Long Bay–Cát Bà Archipelago: Quảng Ninh and Hải Phòng: 1994 [a] 672; (vii), (viii), (ix), (x) (natural) [a] Ha Long Bay features more than 1600 karst limestone pillars and isles in various shapes and sizes, developed in a warm and wet tropical climate. The limestone monolithic islands rise from the ocean, topped with thick jungle ...
A wet-bulb temperature at 500 hPa in a tropical atmosphere of −13.2 °C (8.2 °F) is required to initiate convection if the water temperature is 26.5 °C (79.7 °F), and this temperature requirement increases or decreases proportionally by 1 °C in the sea surface temperature for each 1 °C change at 500 hpa.