Water temperature in Hanoi

This data the coastal Hanoi water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current water temperature in Hanoi

Water temperature in Hanoi today is 30°C. Based on our historical data over a period of ten years, the warmest water in this day in Hanoi was, like today, 30°C, and the coldest was recorded in 2021 at 27°C. Water temperature in Hanoi is expected to drop to 27.8°C in the next 10 days. September average water temperature in Hanoi is 27.9°C, the minimum temperature is 26°C, and the maximum is 30°C.

The swimming season in Hanoi lasts from February to December. During those months, Hanoi water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Hanoi in winter reaches 18.3°C, in spring 24.7°C, in summer the average temperature rises to 29.6°C, and in autumn it is 25.4°C.

Hanoi water temperature now

Current temperature and weather

Data in a table show Hanoi temperature today (6 September 2025). For more information and forecast for a few days, go to the weather forecast Hanoi.

0-3 h	3-6 h	6-9 h	9-12 h
25.8°C	25.2°C	25°C	29.5°C

12-15 h	15-18 h	18-21 h	21-24 h
32.6°C	32.8°C	29.7°C	27.1°C

Hanoi water temperature by month

These figures shows the average, minimum and maximum monthly water temperature in Hanoi. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Hanoi on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Hanoi

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Our report for Hanoi is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.