Measurements:
°C
°F
Kos
56°F
NE 6 mph
Feels like: 54°F
Precip: 100%
World Resorts Greece Kos Weather

Kos Sea Water Temperature

Current Sea Water Temperature:
+65.8°F
Maximum Sea Water Temperature in February: 68.0°F
Minimum Sea Water Temperature in February: 61.8°F
Average water temperature in February: 64.6°F

Sea Water Temperature for the Last 10 Days:

February 21 65.8°F February 16 64.4°F
February 20 65.6°F February 15 66.0°F
February 19 65.4°F February 14 65.6°F
February 18 65.4°F February 13 66.2°F
February 17 66.0°F February 12 65.4°F

When is the Warmest Sea for Kos?

According to our data for the last three years for Kos the highest average sea water temperature was in August, September and July.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Kos was 81.7°F. The maximum and minimum values were 79.0°F and 84.4°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Kos was 79.1°F. The maximum and minimum values were 77.4°F and 80.6°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Kos was 80.1°F. The maximum and minimum values were 75.6°F and 82.6°F respectively.

Best Time to Visit Kos
The most sunny months:
July 31 days
August 31 days
June 29 days
The most warm months:
August 87.0 °F
July 86.6 °F
September 82.2 °F
Warmest sea temperature:
August 81.4 °F
September 80.2 °F
July 78.8 °F
The most cold months:
January 58.0 °F
February 58.5 °F
March 60.7 °F
The most rainy months:
January 7 days
December 6 days
February 5 days
The most windy months:
January 17 mph
February 17 mph
July 16 mph

Kos on the Weather Map

Greece Resorts:
NAME
Athenes +60
Athos +56
Chalkidiki +56
Chania +62
Corfu +56
Crete +50
Heraklion +60
Lefkada +56
Mykonos +58
Paralia Katerini +58
Rhodes +52
Santorini +60
Thasos +48
Thessaloniki +52
Zakynthos +54
24 Hours Weather Forecast
Kos
Local time: 11:49
21 feb, saturday
1200 56°F
NE
6 mph
1500 56°F
SE
5 mph
1800 58°F
W
1 mph
2100 58°F
N
2 mph
22 feb, sunday
0000 56°F
NE
4 mph
0300 58°F
SE
1 mph
0600 56°F
S
7 mph
0900 56°F
S
9 mph