Water temperature in Ko Lanta

This data the coastal Ko Lanta 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 Ko Lanta

Water temperature in Ko Lanta today is 29.3°C. Based on our historical data over a period of ten years, the warmest water in this day in Ko Lanta was recorded in 2018 and was 29.4°C, and the coldest was recorded in 2011 at 28°C. Sea water temperature in Ko Lanta is expected to drop to 29.2°C in the next 10 days. September average water temperature in Ko Lanta is 29.2°C, the minimum temperature is 27.6°C, and the maximum is 30.6°C.

The swimming season in Ko Lanta lasts from January to December, twelve months per year! During those months, Ko Lanta water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Ko Lanta in winter reaches 28.7°C, in spring 30.3°C, in summer the average temperature rises to 29.8°C, and in autumn it is 29.3°C.

Ko Lanta water temperature now

The sea salinity in Ko Lanta is 31.61‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Ko Lanta 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 Ko Lanta. 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 Ko Lanta. Data in table shown for 26 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Ko Lanta

Ko Lanta weather forecast

Current temperature and weather

Data in a table show Ko Lanta temperature today (26 September 2025). For more information and forecast for a few days, go to the weather forecast Ko Lanta.

0-3 h	3-6 h	6-9 h	9-12 h
28.4°C	28.2°C	28.2°C	28.4°C

12-15 h	15-18 h	18-21 h	21-24 h
28.8°C	29°C	28.8°C	28.6°C

Ko Lanta water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Ko Lanta. 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 Ko Lanta 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 Ko Lanta

The nearest beaches and cities from Ko Lanta 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
Ko Phi Phi Don	29.3°C	29°C		0.66 m
Koh Ngai	29.3°C	29°C		0.57 m
Phi Phi Islands	29.4°C	29°C		0.76 m
Ko Kradan	29.4°C	29°C		0.57 m
Krabi	29.3°C	30°C		0.22 m
Railay Beach	29.4°C	30°C		0.22 m
Ao Nang	29.4°C	30°C		0.22 m
Ban Ao Nang	29.3°C	30°C		0.18 m
Kantang	29.6°C	31°C		0.4 m
Cape Panwa	29.3°C	29°C		0.63 m

If you have interesting photos of this place, you can upload them here. Photos will be available to all users after verification by the moderator.

Koh Lanta, Ko Lanta Yai

Get widget or API for your website

Our report for Ko Lanta 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.