INSTRUMENT / SEA TEMPERATURE
Symi Water Temperature
Updated Sat 14:58 (Europe/Athens)
Greece · Forecast updated Nov 7, 2026, 14:58 UTC
Current Sea Temperature
23.0°C
73.4°F
Mild water
Valid Nov 7, 2026, 14:58 (Europe/Athens). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
Close to average
The typical November average is 23.1°C (73.6°F) from the historical baseline.
Recent trend
Cooling by 0.7°C
Seven-day average: 23.6°C, versus 24.4°C in the prior seven days.
What to wear
Mild water
A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions or replace the snorkel forecast.
Typical Sea Temperature Over the Year
In the historical baseline for Symi, typical monthly averages range from about 17.8°C (64.0°F) in March to 27.8°C (82.0°F) in August.
Over the past 30 days, the average sea temperature in Symi has been 24.7°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Symi, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 18.9–20.3°C | 19.4°C / 66.9°F |
| February | 17.6–18.6°C | 18.1°C / 64.6°F |
| March | 17.4–18.2°C | 17.8°C / 64.0°F |
| April | 17.7–19.4°C | 18.3°C / 64.9°F |
| May | 19.6–20.6°C | 20.0°C / 68.0°F |
| June | 23.1–24.7°C | 24.0°C / 75.2°F |
| July | 25.7–27.8°C | 26.9°C / 80.4°F |
| August | 27.2–28.2°C | 27.8°C / 82.0°F |
| September | 26.5–27.9°C | 27.4°C / 81.3°F |
| October | 24.5–26.1°C | 25.2°C / 77.4°F |
| November | 22.5–23.7°C | 23.1°C / 73.6°F |
| December | 20.1–21.5°C | 20.9°C / 69.6°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (36.63, 27.88). Each month is the mean of yearly monthly means; the range is the lowest and highest of those yearly monthly means. Open-Meteo methodology.
Water temperature by month
Each month uses the 2023–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Symi in January
Typical January water temperature near Symi is 19.4°C (66.9°F), with yearly monthly means from 18.9–20.3°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: December 20.9°C · February 18.1°C.
Explore Symi sea temperature in January, including swim comfort and month comparisons →
Symi in February
Typical February water temperature near Symi is 18.1°C (64.6°F), with yearly monthly means from 17.6–18.6°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: January 19.4°C · March 17.8°C.
Explore Symi sea temperature in February, including swim comfort and month comparisons →
Symi in March
Typical March water temperature near Symi is 17.8°C (64.0°F), with yearly monthly means from 17.4–18.2°C.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: February 18.1°C · April 18.3°C.
Explore Symi sea temperature in March, including swim comfort and month comparisons →
Symi in April
Typical April water temperature near Symi is 18.3°C (64.9°F), with yearly monthly means from 17.7–19.4°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: March 17.8°C · May 20.0°C.
Explore Symi sea temperature in April, including swim comfort and month comparisons →
Symi in May
Typical May water temperature near Symi is 20.0°C (68.0°F), with yearly monthly means from 19.6–20.6°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: April 18.3°C · June 24.0°C.
Explore Symi sea temperature in May, including swim comfort and month comparisons →
Symi in June
Typical June water temperature near Symi is 24.0°C (75.2°F), with yearly monthly means from 23.1–24.7°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: May 20.0°C · July 26.9°C.
Explore Symi sea temperature in June, including swim comfort and month comparisons →
Symi in July
Typical July water temperature near Symi is 26.9°C (80.4°F), with yearly monthly means from 25.7–27.8°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: June 24.0°C · August 27.8°C.
Explore Symi sea temperature in July, including swim comfort and month comparisons →
Symi in August
Typical August water temperature near Symi is 27.8°C (82.0°F), with yearly monthly means from 27.2–28.2°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: July 26.9°C · September 27.4°C.
Explore Symi sea temperature in August, including swim comfort and month comparisons →
Symi in September
Typical September water temperature near Symi is 27.4°C (81.3°F), with yearly monthly means from 26.5–27.9°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: August 27.8°C · October 25.2°C.
Explore Symi sea temperature in September, including swim comfort and month comparisons →
Symi in October
Typical October water temperature near Symi is 25.2°C (77.4°F), with yearly monthly means from 24.5–26.1°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: September 27.4°C · November 23.1°C.
Explore Symi sea temperature in October, including swim comfort and month comparisons →
Symi in November
Typical November water temperature near Symi is 23.1°C (73.6°F), with yearly monthly means from 22.5–23.7°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: October 25.2°C · December 20.9°C.
Explore Symi sea temperature in November, including swim comfort and month comparisons →
Symi in December
Typical December water temperature near Symi is 20.9°C (69.6°F), with yearly monthly means from 20.1–21.5°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: November 23.1°C · January 19.4°C.
Explore Symi sea temperature in December, including swim comfort and month comparisons →
Forecast archive (growing)
These values come from hourly forecasts SnorkelForecast has stored. They cover only months with records and do not replace the historical baseline.
| 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 | 26.1°C / 79.0°F | 27.7°C / 81.9°F | 28.9°C / 84.0°F |
| October | 24.1°C / 75.4°F | 25.3°C / 77.5°F | 26.6°C / 79.9°F |
| November | 22.9°C / 73.2°F | 23.4°C / 74.2°F | 24.3°C / 75.7°F |
Partial coverage: 6 calendar months with records. Profile calculated from 3839 hourly forecast records across 6 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 water temperature in Symi today?
The current sea surface temperature near Symi is 23.0°C (73.4°F). Over the last 30 days, the average has been 24.7°C.
When is the water warmest in Symi?
The water is typically warmest in August, at around 27.8°C (82.0°F) in the 2023–2025 historical baseline.
When is the water coldest in Symi?
The water is typically coldest in March, at around 17.8°C (64.0°F) in the same historical baseline. A wetsuit is usually recommended during this period.
Can you swim in Symi today?
At 23.0°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 →