Measurements:
°C
°F
Rethymno
78°F
S 3 mph
Feels like: 80°F
Precip: 4%
World Resorts Greece Rethymno Weather

Rethymno Sea Water Temperature

Current Sea Water Temperature:
+83.6°F
Maximum Sea Water Temperature in August: 87.0°F
Minimum Sea Water Temperature in August: 80.4°F
Average water temperature in August: 83.6°F

Sea Water Temperature for the Last 10 Days:

August 19 83.6°F August 14 84.2°F
August 18 82.6°F August 13 84.0°F
August 17 82.8°F August 12 84.6°F
August 16 83.0°F August 11 84.2°F
August 15 83.8°F August 10 84.0°F

When is the Warmest Sea for Rethymno?

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

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 Rethymno was 83.8°F. The maximum and minimum values were 82.6°F and 84.6°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Rethymno was 84.1°F. The maximum and minimum values were 82.6°F and 87.0°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Rethymno was 81.6°F. The maximum and minimum values were 78.6°F and 83.4°F respectively.

Best Time to Visit Rethymno
The most sunny months:
July 30 days
August 30 days
June 28 days
The most warm months:
August 89.0 °F
July 88.7 °F
September 84.8 °F
Warmest sea temperature:
August 83.6 °F
July 82.3 °F
September 81.6 °F
The most cold months:
January 59.0 °F
February 59.7 °F
March 62.4 °F
The most rainy months:
January 4 days
December 4 days
February 3 days
The most windy months:
January 10 mph
February 10 mph
March 9 mph

Rethymno on the Weather Map

Greece Resorts:
NAME
Athenes +82
Bali Gr +74
Chalkidiki +84
Chania +76
Corfu +84
Crete +74
Hanioti +82
Heraklion +76
Paralia Katerini +82
Pefkochori +82
Rhodes +78
Sithonia +82
Thasos +88
Thessaloniki +84
Zakynthos +80
24 Hours Weather Forecast
Rethymno
Local time: 22:03
20 aug, thursday
0000 76°F
S
3 mph
0300 74°F
SW
4 mph
0600 72°F
SW
4 mph
0900 82°F
S
4 mph
1200 88°F
SE
5 mph
1500 90°F
SE
6 mph
1800 88°F
S
6 mph
2100 80°F
S
3 mph