Measurements:
°C
°F
Cephalonia
68°F
SW 4 mph
Feels like: 68°F
Precip: 4%
World Resorts Greece Cephalonia Weather

Cephalonia Sea Water Temperature

Current Sea Water Temperature:
+79.6°F
Maximum Sea Water Temperature in September: 87.2°F
Minimum Sea Water Temperature in September: 77.0°F
Average water temperature in September: 81.4°F

Sea Water Temperature for the Last 10 Days:

September 28 79.6°F September 23 82.2°F
September 27 80.4°F September 22 82.8°F
September 26 80.2°F September 21 82.0°F
September 25 80.8°F September 20 81.6°F
September 24 81.2°F September 19 82.0°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: 2026 2025 2024

The average sea surface temperature in August 2026 for Cephalonia was 84.2°F. The maximum and minimum values were 81.2°F and 86.2°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Cephalonia was 83.8°F. The maximum and minimum values were 79.6°F and 86.8°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Cephalonia was 82.7°F. The maximum and minimum values were 80.4°F and 85.2°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 89.0 °F
July 87.9 °F
September 82.7 °F
Warmest sea temperature:
August 83.2 °F
September 81.4 °F
July 81.0 °F
The most cold months:
January 56.8 °F
February 57.5 °F
March 59.7 °F
The most rainy months:
January 7 days
November 7 days
December 7 days
The most windy months:
January 12 mph
February 11 mph
December 10 mph

Cephalonia on the Weather Map

Greece Resorts:
NAME
F°
Athenes +64
Bali Gr +56
Chalkidiki +70
Chania +64
Corfu +74
Crete +60
Hanioti +70
Paralia Katerini +64
Pefkochori +70
Possidi +70
Rhodes +68
Sithonia +70
Thasos +64
Thessaloniki +64
Zakynthos +70
24 Hours Weather Forecast
Cephalonia
Local time: 02:57
29 sep, tuesday
0300 68°F
SW
4 mph
0600 68°F
W
4 mph
0900 64°F
W
4 mph
1200 72°F
SW
2 mph
1500 72°F
SE
4 mph
1800 70°F
SE
6 mph
2100 66°F
S
6 mph
30 sep, wednesday
0000 68°F
SW
6 mph