Water temperature in Koh Rong

This data the coastal Koh Rong sea 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 sea temperature in Koh Rong

Water temperature in Koh Rong today is 29°C. Based on our historical data over a period of ten years, the warmest water in this day in the Gulf of Thailand near Koh Rong was recorded in 2008 and was 29.9°C, and the coldest was recorded in 2012 at 27.7°C. Sea water temperature in Koh Rong is expected to drop to 28.7°C in the next 10 days. September average water temperature in Koh Rong is 28.9°C, the minimum temperature is 27.2°C, and the maximum is 30.4°C.

The swimming season in Koh Rong lasts from January to December, twelve months per year! During those months, Koh Rong water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Koh Rong in winter reaches 28.5°C, in spring 30.2°C, in summer the average temperature rises to 29.3°C, and in autumn it is 29.2°C.

Koh Rong water temperature now

The sea salinity in Koh Rong is 31.07‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Koh Rong for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Koh Rong. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Koh Rong. Data in table shown for 5 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Koh Rong

Koh Rong weather forecast

Current temperature and weather

Data in a table show Koh Rong temperature today (5 September 2025). For more information and forecast for a few days, go to the weather forecast Koh Rong.

0-3 h	3-6 h	6-9 h	9-12 h
27.8°C	27.3°C	27.7°C	27.7°C

12-15 h	15-18 h	18-21 h	21-24 h
27.7°C	27.2°C	27.9°C	28.5°C

Koh Rong water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Koh Rong. 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 Koh Rong 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 Koh Rong

The nearest beaches and cities from Koh Rong with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Koh Dek Koul	29°C	27°C		0.59 m
Phu Quoc	28.7°C	29°C		0.7 m
Kampot	28.7°C	30°C		0.49 m
An Thoi	28.7°C	29°C		0.78 m
Sao Beach	28.7°C	29°C		0.75 m
Krong Kep	28.4°C	30°C		0.53 m
Bang Bao Beach	28.7°C	28°C		0.6 m
Ko Kut	28.8°C	28°C		0.56 m
Ko Mak	28.8°C	28°C		0.55 m
Ko Wai	28.9°C	28°C		0.54 m

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Koh Rong Sanloem

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Our report for Koh Rong 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.