Measurements:
°C
°F
Koh Lanta
88°F
SE 7 mph
Feels like: 98°F
Precip: 84%
World Resorts Thailand Koh Lanta Weather

Koh Lanta Sea Water Temperature

Current Sea Water Temperature:
+92.8°F
Maximum Sea Water Temperature in May: 95.0°F
Minimum Sea Water Temperature in May: 86.6°F
Average water temperature in May: 91.5°F

Sea Water Temperature for the Last 10 Days:

May 09 92.8°F May 04 92.4°F
May 08 92.8°F May 03 93.0°F
May 07 93.2°F May 02 92.6°F
May 06 93.2°F May 01 93.4°F
May 05 93.0°F April 30 93.8°F

When is the Warmest Sea for Koh Lanta?

According to our data for the last three years for Koh Lanta the highest average sea water temperature was in April, May and June.

Average Water Temperature by Month, °F

Sea Water Temperature in April

Select Year: 2026 2025 2024

The average sea surface temperature in April 2026 for Koh Lanta was 93.0°F. The maximum and minimum values were 90.8°F and 94.8°F respectively.

Sea Water Temperature in May

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Koh Lanta was 90.6°F. The maximum and minimum values were 89.4°F and 92.2°F respectively.

Sea Water Temperature in June

Select Year: 2025 2024 2023

The average sea surface temperature in June 2025 for Koh Lanta was 90.0°F. The maximum and minimum values were 89.0°F and 91.0°F respectively.

Best Time to Visit Koh Lanta
The most sunny months:
March 21 days
February 18 days
April 16 days
The most warm months:
May 92.3 °F
April 92.3 °F
March 92.0 °F
Warmest sea temperature:
April 91.5 °F
May 91.4 °F
June 90.3 °F
The most cold months:
November 89.5 °F
September 89.7 °F
December 89.7 °F
The most rainy months:
September 14 days
October 14 days
May 13 days
The most windy months:
September 11 mph
August 11 mph
July 11 mph

Koh Lanta on the Weather Map

Thailand Resorts:
NAME
Bang Tao Beach +88
Bangkok +102
Hua Hin +94
Karon Beach +88
Kata Beach +88
Khao Lak +86
Ko Li Pe +88
Koh Chang +90
Patong Beach +88
Pattaya +94
Phangan +90
Phi Phi +88
Phuket +88
Samet +92
Samui +90
24 Hours Weather Forecast
Koh Lanta
Local time: 13:00
10 may, sunday
1500 90°F
E
7 mph
1800 88°F
NE
6 mph
2100 88°F
NW
2 mph
11 may, monday
0000 88°F
SW
4 mph
0300 86°F
W
5 mph
0600 86°F
SW
5 mph
0900 86°F
SW
8 mph
1200 86°F
SW
12 mph