Search for cities, countries, lakes and rivers

Ha Long

Water Temperature in the South China Sea in Ha Long, Vietnam: Current, Historical Data and Forecast

On this page, you will find comprehensive information about the sea temperature in Ha Long in Vietnam, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Current Water Temperature in Ha Long

26.0°C

TODAY

25.6°C

YESTERDAY

24.0°C

A WEEK AGO

All water temperature data is now available in our official mobile apps — for iOS and Android.

Analysis, Historical Data, and Forecast of Water Temperature

Today sea water temperature in the South China Sea in Ha Long is 26°C. This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Water Temperature Chart for South China Sea in Ha Long Over the Last 30 Days

The water temperature in Ha Long today is lower than both a week ago and a month ago. Today's sea temperature is generally in line with historical values for this day.

According to our forecast, the sea temperature in Ha Long will remain nearly unchanged in the coming days, its value will be 26.9°C.

Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.

Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts across Vietnam to enhance accuracy.

Water temperature data for Ha Long and nearby towns and resorts is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.

Table of Daily Sea Temperature Data

DateCurrentAverageForecast
May 224.0°C25.3°C
May 324.9°C25.3°C
May 425.8°C26.0°C
May 525.9°C26.3°C
May 626.0°C26.3°C
May 725.5°C26.5°C
May 825.6°C26.8°C
May 926.5°C27.3°C
May 1026.8°C26.1°C
May 1127.5°C26.2°C
May 1227.5°C26.3°C
May 1327.5°C26.4°C
May 1427.8°C26.5°C
May 1527.8°C26.6°C
May 1628.3°C26.8°C
May 1728.0°C26.9°C
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Sea Temperature in Ha Long Throughout the Year

Throughout the year, the sea temperature in Ha Long is always above 64°F (18°C), the sea temperature exceeds 72°F (22°C) for 262 days, and exceeds 77°F (25°C) for 207 days.

Below is the annual chart of sea temperature changes in the South China Sea in Ha Long.

January

MinimumAverageMaximum
17°C19.5°C22°C

February

MinimumAverageMaximum
17°C19.5°C22°C

March

MinimumAverageMaximum
17°C20°C23°C

April

MinimumAverageMaximum
19°C23°C27°C

May

MinimumAverageMaximum
24°C27.5°C31°C

June

MinimumAverageMaximum
27°C29.5°C32°C

July

MinimumAverageMaximum
29°C31°C33°C

August

MinimumAverageMaximum
28°C30°C32°C

September

MinimumAverageMaximum
26°C29°C32°C

October

MinimumAverageMaximum
22°C27°C32°C

November

MinimumAverageMaximum
23°C25.5°C28°C

December

MinimumAverageMaximum
17°C21.5°C26°C

Monthly Water Temperature Histogram for South China Sea in Ha Long

You can explore detailed data on how the water temperature in Ha Long varies each month:

What Beaches Are There In and Around Ha Long?

Ha Long Beach

Ha Long Beach is a 4-stars sandy beach, located in a 3 km (2 miles) radius of Ha Long. There are lifeguards on the beach. There is parking. There are cafés. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.

Burning Beach

Burning Beach is a 4-stars sandy beach, located in a 4 km (2 miles) radius of Ha Long. There is parking. There are restrooms. There are cafés. Burning Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.

Bai Chay Beach

Bai Chay Beach is a 4-stars sandy beach, located in a 4 km (2 miles) radius of Ha Long. There is parking. There are restrooms. There are cafés. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.

Marina Beach

Marina Beach is a 4-stars sandy beach, located in a 8 km (5 miles) radius of Ha Long. There is parking. There are restrooms. There are cafés. Marina Beach is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.

Beach Paradise Bay

Beach Paradise Bay is a 1-stars sandy beach, located in a 9 km (6 miles) radius of Ha Long.

Tuan Chau Beach-Tuan Chau Island

Tuan Chau Beach-Tuan Chau Island is a 4-stars sandy beach, located in a 9 km (6 miles) radius of Ha Long. There is parking. There are restrooms. There are cafés. Tuan Chau Beach-Tuan Chau Island is an excellent spot for fishing enthusiasts, offering good opportunities to catch local fish. The calm waters make this beach ideal for swimming, providing a safe and enjoyable experience for all visitors.

Ha Long Weather

MAY 10

20°C / 27°C
moderate rain

humidity: 69% | wind: 3 km/h

MAY 11

20°C / 29°C
overcast clouds: 85-100%

humidity: 66% | wind: 2 km/h

MAY 12

22°C / 30°C
overcast clouds: 85-100%

humidity: 77% | wind: 3 km/h

MAY 13

24°C / 31°C
light rain

humidity: 74% | wind: 3 km/h

Sea Temperature in the South China Sea in Ha Long: General Trends and Swimming Opportunities

Original name
Vịnh Hạ Long
The Local Time
01:41
Time Zone
UTC+7
Sunrise
05:18
Sunset
18:20
Length of the day
13 h 2 m

The coastal areas of Vietnam typically feature a tropical climate with high humidity levels, characterized by a dry season from November to April and a wet season from May to October. They tend to have both hotter temperatures and higher rainfall levels compared to the country's inland regions.

Ha Long is located in Asia in the Northern Hemisphere at a latitude of 21 degrees, along the shores of the South China Sea. Ha Long lies within in Vietnam.

The average annual daytime air temperature in Ha Long is 27°C (81°F), with the average nighttime temperature being 20°C (68°F). The highest average daily temperature occurs in July, reaching 32°C (89°F), while the lowest is in January at 19°C (67°F). As for nighttime temperatures, the minimum average temperature of 14°C (56°F) is recorded in January, and the maximum is in July, reaching 26°C (78°F).

According to historical data, Ha Long experiences 133 rainy days per year, which accounts for 36 percent of all days in the year. On average, there are 11 rainy days each month. The wettest month is August, with 19 rainy days and 411 mm (16.2 inches) of precipitation, while the driest month is December, which typically has 4 rainy days and only 21 mm (0.8 inches) of precipitation.

The average annual water temperature in South China Sea in Ha Long is 25°C (77°F). In January, the water reaches its lowest point of the year at 17°C (63°F), while in July, it peaks at 33°C (91°F). The months suitable for comfortable beach vacations and swimming in the South China Sea are May, June, July, August, September, October, and November. During this period, the water temperature stays above 20°C (68°F) and can reach up to 33°C (91°F) on some days.

Geographical Location of Ha Long

Nearby Cities

Frequently Asked Questions About Ha Long and its Water Temperatures

What is the current sea temperature in Ha Long?

The water temperature today in the South China Sea in Ha Long is 79°F (26°C).

In which months is the water temperature in Ha Long comfortable for swimming?

The water temperature in the South China Sea in Ha Long is comfortable for swimming and beach vacations in May, June, July, August, September, October, and November.

What is the water temperature in Ha Long during the winter?

The water temperature in the South China Sea in Ha Long during the winter ranges from 17°C to 26°C (63°F to 79°F).

What is the water temperature in Ha Long during the spring?

The water temperature in the South China Sea in Ha Long during the spring ranges from 17°C to 31°C (63°F to 88°F).

What is the water temperature in Ha Long during the summer?

The water temperature in the South China Sea in Ha Long during the summer ranges from 27°C to 33°C (81°F to 91°F).

What is the water temperature in Ha Long during the fall?

The water temperature in the South China Sea in Ha Long during the fall ranges from 22°C to 32°C (72°F to 90°F).

Is it possible to swim in the sea in Ha Long year-round?

No, it is not possible to swim in the South China Sea in Ha Long year-round, the months suitable for comfortable swimming are May, June, July, August, September, October, and November.

Is Ha Long a popular tourist destination for beach vacations?

Ha Long has a moderate level of popularity for beach vacations; while it does receive some visitors, it is not among the top seaside destinations, as other locations may offer more favorable conditions.

What sea temperatures can I expect in Ha Long in the next month?

In June, the water temperature in the South China Sea in Ha Long will range between 81°F (27°C) and 90°F (32°C)