Ko Samui Water Temperature

Ko Samui is a Island close to Gulf of Thailand. tropical monsoon climate would be the climate here. May is the month with the highest water temperature at 87.1°F / 30.6°C. The month with the lowest is January with an average water temperature of 81.9°F / 27.7°C. The avg. air temperature is around 82.9°F / 28.3°C, April is the month with the highest temperature. December is the coolest with 77.9°F / 25.5°C average air temperature. February is the month with the min. precipitation of 0in / 1.1mm and October with the max. precipitation in a year with 17.1in / 434.4mm. January, February, March, May, June, July, August, September would be the best time to visit this place.

Ko Samui Summary

Description Value
Current water temperature 30 °C / 86 °F
Warmest Month Water Temperature: May with 30.6°C / 87.1°F
Coldest Month Water Temperature: January with 27.7°C / 81.9°F
Warmest Month Air Temperature: April with 28.3°C / 82.9°F
Coldest Month Air Temperature: December with 25.5°C / 77.9°F
Wettest Month: October with 434.4mm / 17.1in
Driest Month: February with 1.1mm / 0in
Highest Humidity October with 87.6%
Lowest Humidity March with 75.2%
Best Time to Visit: January, February, March, May, June, July, August, September
Climate Classification tropical monsoon climate

Ko Samui water temperature by month

Gulf of Thailand water temperature by month

Max. Water

Temperature (°C)

ø. Water

Temperature (°C)

Min. Water

Temperature (°C)

January

27.9 27.7 27.4

February

28.7 28.2 27.8

March

29.9 29.3 28.6

April

30.7 30.3 29.8

May

30.8 30.6 30.3

June

30.4 30.1 29.7

July

29.9 29.7 29.4

August

29.5 29.3 29.1

September

29.6 29.3 29.1

October

29.4 29.2 29.1

November

29.1 28.8 28.4

December

28.5 28.1 27.6

Gulf of Thailand water temperature by month

Max. Water

Temperature (°F)

ø. Water

Temperature (°F)

Min. Water

Temperature (°F)

January

82.2 81.9 81.3

February

83.7 82.8 82

March

85.8 84.7 83.5

April

87.3 86.5 85.6

May

87.4 87.1 86.5

June

86.7 86.2 85.5

July

85.8 85.5 84.9

August

85.1 84.7 84.4

September

85.3 84.7 84.4

October

84.9 84.6 84.4

November

84.4 83.8 83.1

December

83.3 82.6 81.7
The highest water temperature will be reached in May with around 87.1°F / 30.6°C. The lowest in January with an average water temperature of 81.9°F / 27.7°C.

Ko Samui weather today & 14-day weather forecast

Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Apr. 13
Broken clouds
85 °F
84°F
30 °C
29°C
3mph (4km/h)
east-southeast
0in (0mm)
20 %
70%
Apr. 14
Overcast clouds
85 °F
81°F
30 °C
27°C
2mph (3km/h)
south-southwest
0in (2mm)
35 %
72%
Apr. 15
Broken clouds
85 °F
82°F
29 °C
28°C
1mph (2km/h)
south
0in (2mm)
35 %
72%
Apr. 16
Light rain
86 °F
83°F
30 °C
28°C
2mph (3km/h)
west-southwest
0in (6mm)
65 %
69%
Apr. 17
Overcast clouds
85 °F
82°F
30 °C
28°C
1mph (2km/h)
southeast
0in (1mm)
25 %
69%
Apr. 18
Light rain
85 °F
80°F
29 °C
27°C
1mph (2km/h)
east-southeast
0in (7mm)
70 %
68%
Apr. 19
Thunderstorm with rain
83 °F
80°F
28 °C
27°C
5mph (8km/h)
west-southwest
0in (9mm)
75 %
76%
Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Apr. 20
Thunderstorm with rain
86 °F
79°F
30 °C
26°C
4mph (6km/h)
west
0in (11mm)
80 %
73%
Apr. 21
Broken clouds
87 °F
82°F
31 °C
28°C
4mph (6km/h)
west
0in (2mm)
35 %
72%
Apr. 22
Broken clouds
86 °F
82°F
30 °C
28°C
4mph (6km/h)
west
0in (1mm)
20 %
73%
Apr. 23
Broken clouds
86 °F
83°F
30 °C
29°C
4mph (7km/h)
west
0in (0mm)
0 %
72%
Apr. 24
Broken clouds
85 °F
84°F
30 °C
29°C
4mph (7km/h)
west
0in (0mm)
0 %
69%
Apr. 25
Broken clouds
84 °F
83°F
29 °C
28°C
5mph (7km/h)
west
0in (0mm)
10 %
73%
Apr. 26
Overcast clouds
87 °F
83°F
31 °C
29°C
5mph (7km/h)
west
0in (1mm)
25 %
71%
Apr. 27
Overcast clouds
86 °F
84°F
30 °C
29°C
4mph (7km/h)
west
0in (0mm)
0 %
69%
Apr. 28
Overcast clouds
84 °F
82°F
29 °C
28°C
4mph (6km/h)
west
0in (1mm)
30 %
71%

Ko Samui weather by month / climate table

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

28.8 25.6 23 79.3 10 81.1%

February

30.7 26.4 22.8 1.1 0 75.9%

March

31.8 27.5 23.5 85.7 3 75.2%

April

32.8 28.3 24.8 114.3 12 75.8%

May

31.9 27.7 25.2 258.7 27 80.2%

June

31.2 27.4 25 193.8 24 79.9%

July

31.1 27.2 24.8 192.7 24 79.1%

August

31.3 27.1 24.6 221.8 25 79.2%

September

30.9 26.5 24.3 284.6 27 82.9%

October

29.4 25.9 23.9 434.4 0 87.6%

November

28.6 25.8 23.8 391.5 27 87.2%

December

28.2 25.5 23.1 212 19 83.7%

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

83.8 78.1 73.4 3.1 10 81.1%

February

87.3 79.5 73 0 0 75.9%

March

89.2 81.5 74.3 3.4 3 75.2%

April

91 82.9 76.6 4.5 12 75.8%

May

89.4 81.9 77.4 10.2 27 80.2%

June

88.2 81.3 77 7.6 24 79.9%

July

88 81 76.6 7.6 24 79.1%

August

88.3 80.8 76.3 8.7 25 79.2%

September

87.6 79.7 75.7 11.2 27 82.9%

October

84.9 78.6 75 17.1 0 87.6%

November

83.5 78.4 74.8 15.4 27 87.2%

December

82.8 77.9 73.6 8.3 19 83.7%
February is the month with the lowest rain of 0in / 1.1mm and October with the highest precipitation in a year with 17.1in / 434.4mm. The avg. temperature is around 82.9°F / 28.3°C, April is the month with the highest temperature. December is the coolest with 77.9°F / 25.5°C average temperature.
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