Measurements:
°C
°F
Cephalonia
58°F
SE 9 mph
Feels like: 56°F
Precip: 100%
World Resorts Greece Cephalonia Weather

Cephalonia Sea Water Temperature

Current Sea Water Temperature:
+68.0°F
Maximum Sea Water Temperature in December: 72.0°F
Minimum Sea Water Temperature in December: 62.2°F
Average water temperature in December: 66.7°F

Sea Water Temperature for the Last 10 Days:

December 05 68.0°F November 30 69.0°F
December 04 68.2°F November 29 69.0°F
December 03 68.6°F November 28 69.2°F
December 02 68.2°F November 27 69.2°F
December 01 68.2°F November 26 69.4°F

When is the Warmest Sea for Cephalonia?

According to our data for the last three years for Cephalonia 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 Cephalonia was 81.2°F. The maximum and minimum values were 78.6°F and 83.4°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Cephalonia was 80.2°F. The maximum and minimum values were 78.8°F and 81.6°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Cephalonia was 81.7°F. The maximum and minimum values were 79.4°F and 84.6°F respectively.

Best Time to Visit Cephalonia
The most sunny months:
July 30 days
August 29 days
June 26 days
The most warm months:
August 89.1 °F
July 88.0 °F
September 82.9 °F
Warmest sea temperature:
August 83.2 °F
September 81.2 °F
July 80.9 °F
The most cold months:
January 56.9 °F
February 57.6 °F
March 60.1 °F
The most rainy months:
January 7 days
November 7 days
December 7 days
The most windy months:
January 11 mph
February 11 mph
December 10 mph

Cephalonia on the Weather Map

Greece Resorts:
NAME
Athenes +58
Athos +58
Bali Gr +60
Chalkidiki +58
Chania +52
Corfu +56
Crete +56
Hanioti +60
Heraklion +60
Hersonissos +56
Paralia Katerini +50
Rhodes +62
Santorini +66
Thasos +60
Thessaloniki +52
24 Hours Weather Forecast
Cephalonia
Local time: 09:49
05 dec, friday
1200 60°F
SE
11 mph
1500 60°F
SE
9 mph
1800 58°F
S
5 mph
2100 56°F
S
5 mph
06 dec, saturday
0000 56°F
SE
6 mph
0300 58°F
SE
6 mph
0600 56°F
SE
8 mph
0900 58°F
SE
15 mph