Symi Sea Temperature
Updated Sat 16:42 (Europe/Athens)
Greece · Forecast updated Sep 5, 2026, 16:42 UTC
Current Sea Temperature
28.8°C
83.8°F
Very warm water
Versus this month's average
0.6°C above
The September average in our archive is 28.2°C (82.7°F).
Recent trend
Cooling by 0.3°C
Seven-day average: 28.0°C, versus 28.3°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 Symi, monthly averages range from about 24.5°C (76.2°F) in June to 28.3°C (82.9°F) in August.
Over the past 30 days, the average sea temperature in Symi has been 28.3°C.
Monthly Water Temperature Averages
Northern Hemisphere. Summer is generally June–August; winter is December–February.
| Month | Min | Average | Max |
|---|---|---|---|
| June | 22.5°C / 72.5°F | 24.5°C / 76.2°F | 26.9°C / 80.4°F |
| July | 24.8°C / 76.6°F | 26.3°C / 79.4°F | 28.7°C / 83.7°F |
| August | 26.4°C / 79.5°F | 28.3°C / 82.9°F | 29.5°C / 85.1°F |
| September | 27.2°C / 81.0°F | 28.2°C / 82.7°F | 28.9°C / 84.0°F |
Profile calculated from 2329 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Symi
Small Dodecanese island with deep, clear coves and rocky reefs.
- Area
- Dodecanese
Symi Water Temperature: Common Questions
What is the sea temperature in Symi today?
The current sea surface temperature in Symi is 28.8°C. Over the last 30 days, the average has been 28.3°C.
When is the water warmest in Symi?
The warmest monthly average in the Symi archive is August, at around 28.3°C (82.9°F).
When is the water coldest in Symi?
The coldest monthly average in the archive is June, at around 24.5°C (76.2°F).
Can you swim in Symi today?
At 28.8°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 Symi.
View Snorkel Forecast →