Zakynthos Sea Temperature
Updated Sat 19:18 (Europe/Athens)
Greece · Forecast updated Aug 8, 2026, 19:18 UTC
Current Sea Temperature
28.3°C
82.9°F
Very warm water
Versus this month's average
0.5°C above
The August average in our archive is 27.8°C (82.0°F).
Recent trend
Warming by 0.6°C
Seven-day average: 27.6°C, versus 26.9°C in the prior seven days.
What to wear
Very warm water
Swimwear is usually enough; a rash guard adds sun protection.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions.
Sea Surface Temperature Over the Year
In the data collected for Zakynthos, monthly averages range from about 16.4°C (61.5°F) in March to 27.8°C (82.0°F) in August.
Over the past 30 days, the average sea temperature in Zakynthos has been 27.4°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| January | 16.6°C / 61.9°F | 17.3°C / 63.1°F | 18.4°C / 65.1°F |
| February | 16.2°C / 61.2°F | 16.5°C / 61.6°F | 16.8°C / 62.2°F |
| March | 16.0°C / 60.8°F | 16.4°C / 61.5°F | 17.0°C / 62.6°F |
| April | 15.9°C / 60.6°F | 17.1°C / 62.8°F | 19.2°C / 66.6°F |
| May | 18.0°C / 64.4°F | 19.5°C / 67.1°F | 22.8°C / 73.0°F |
| June | 21.5°C / 70.7°F | 24.2°C / 75.5°F | 27.1°C / 80.8°F |
| July | 25.1°C / 77.2°F | 27.0°C / 80.7°F | 29.3°C / 84.7°F |
| August | 26.6°C / 79.9°F | 27.8°C / 82.0°F | 29.2°C / 84.6°F |
| September | 25.0°C / 77.0°F | 25.8°C / 78.4°F | 26.9°C / 80.4°F |
| October | 21.0°C / 69.8°F | 22.3°C / 72.1°F | 25.1°C / 77.2°F |
| November | 19.9°C / 67.8°F | 21.1°C / 70.0°F | 22.1°C / 71.8°F |
| December | 18.4°C / 65.1°F | 19.0°C / 66.2°F | 19.9°C / 67.8°F |
Profile calculated from 7973 hourly forecast records across 12 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Zakynthos
Crystal clear Ionian Sea waters
Zakynthos Water Temperature: Common Questions
What is the sea temperature in Zakynthos today?
The current sea surface temperature in Zakynthos is 28.3°C. Over the last 30 days, the average has been 27.4°C.
When is the water warmest in Zakynthos?
The warmest monthly average in the Zakynthos archive is August, at around 27.8°C (82.0°F).
When is the water coldest in Zakynthos?
The coldest monthly average in the archive is March, at around 16.4°C (61.5°F). A wetsuit is usually recommended during this period.
Can you swim in Zakynthos today?
At 28.3°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Zakynthos.
View Snorkel Forecast →