Measurements:
°C
°F
Cephalonia
78°F
SW 2 mph
Feels like: 80°F
Precip: 3%
World Resorts Greece Cephalonia Weather

Cephalonia Sea Water Temperature

Current Sea Water Temperature:
+76.8°F
Maximum Sea Water Temperature in June: 82.2°F
Minimum Sea Water Temperature in June: 68.4°F
Average water temperature in June: 75.7°F

Sea Water Temperature for the Last 10 Days:

June 18 76.8°F June 13 76.6°F
June 17 76.2°F June 12 77.2°F
June 16 76.0°F June 11 75.6°F
June 15 76.2°F June 10 74.8°F
June 14 76.6°F June 09 75.0°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: 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 56.8 °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
Athenes +76
Bali Gr +60
Chalkidiki +78
Chania +70
Corfu +76
Crete +70
Hanioti +80
Heraklion +72
Hersonissos +74
Paralia Katerini +74
Rhodes +76
Sithonia +78
Thasos +74
Thessaloniki +76
Zakynthos +80
24 Hours Weather Forecast
Cephalonia
Local time: 00:23
19 jun, friday
0300 76°F
W
3 mph
0600 74°F
W
3 mph
0900 78°F
W
3 mph
1200 80°F
N
1 mph
1500 82°F
E
2 mph
1800 82°F
SE
4 mph
2100 78°F
SE
4 mph
20 jun, saturday
0000 76°F
S
2 mph