Fethiye Water Temperature
Updated Tue 10:07 (Europe/Istanbul)
Turkey · Forecast updated Sep 22, 2026, 10:07 UTC
Current Sea Temperature
28.4°C
83.1°F
Very warm water
Valid Sep 22, 2026, 10:07 (Europe/Istanbul). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.3°C above
The typical September average is 28.1°C (82.6°F) from the historical baseline.
Recent trend
Cooling by 0.6°C
Seven-day average: 28.2°C, versus 28.8°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 or replace the snorkel forecast.
Typical Sea Temperature Over the Year
In the historical baseline for Fethiye, typical monthly averages range from about 18.0°C (64.4°F) in March to 29.5°C (85.1°F) in August.
Over the past 30 days, the average sea temperature in Fethiye has been 28.9°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Fethiye, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 19.0–20.8°C | 19.8°C / 67.6°F |
| February | 17.8–19.1°C | 18.5°C / 65.3°F |
| March | 17.7–18.6°C | 18.0°C / 64.4°F |
| April | 18.0–20.1°C | 18.8°C / 65.8°F |
| May | 20.4–21.6°C | 21.0°C / 69.8°F |
| June | 24.4–26.5°C | 25.5°C / 77.9°F |
| July | 27.8–29.2°C | 28.5°C / 83.3°F |
| August | 29.3–29.9°C | 29.5°C / 85.1°F |
| September | 27.6–28.4°C | 28.1°C / 82.6°F |
| October | 25.2–26.4°C | 25.9°C / 78.6°F |
| November | 23.2–24.2°C | 23.6°C / 74.5°F |
| December | 20.4–22.0°C | 21.3°C / 70.3°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (36.63, 29.04). 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.
Fethiye in January
Typical January water temperature near Fethiye is 19.8°C (67.6°F), with yearly monthly means from 19.0–20.8°C.
Fethiye in February
Typical February water temperature near Fethiye is 18.5°C (65.3°F), with yearly monthly means from 17.8–19.1°C.
Fethiye in March
Typical March water temperature near Fethiye is 18.0°C (64.4°F), with yearly monthly means from 17.7–18.6°C.
Fethiye in April
Typical April water temperature near Fethiye is 18.8°C (65.8°F), with yearly monthly means from 18.0–20.1°C.
Fethiye in May
Typical May water temperature near Fethiye is 21.0°C (69.8°F), with yearly monthly means from 20.4–21.6°C.
Fethiye in June
Typical June water temperature near Fethiye is 25.5°C (77.9°F), with yearly monthly means from 24.4–26.5°C.
Fethiye in July
Typical July water temperature near Fethiye is 28.5°C (83.3°F), with yearly monthly means from 27.8–29.2°C.
Fethiye in August
Typical August water temperature near Fethiye is 29.5°C (85.1°F), with yearly monthly means from 29.3–29.9°C.
Fethiye in September
Typical September water temperature near Fethiye is 28.1°C (82.6°F), with yearly monthly means from 27.6–28.4°C.
Fethiye in October
Typical October water temperature near Fethiye is 25.9°C (78.6°F), with yearly monthly means from 25.2–26.4°C.
Fethiye in November
Typical November water temperature near Fethiye is 23.6°C (74.5°F), with yearly monthly means from 23.2–24.2°C.
Fethiye in December
Typical December water temperature near Fethiye is 21.3°C (70.3°F), with yearly monthly means from 20.4–22.0°C.
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 | 22.6°C / 72.7°F | 25.6°C / 78.1°F | 28.0°C / 82.4°F |
| July | 26.3°C / 79.3°F | 28.3°C / 82.9°F | 30.1°C / 86.2°F |
| August | 28.2°C / 82.8°F | 29.2°C / 84.6°F | 30.2°C / 86.4°F |
| September | 27.8°C / 82.0°F | 28.6°C / 83.5°F | 29.6°C / 85.3°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2730 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Fethiye
Turquoise Coast hub with Ölüdeniz lagoon and sheltered clear bays.
- Area
- Muğla
Fethiye Water Temperature: Common Questions
What is the water temperature in Fethiye today?
The current sea surface temperature near Fethiye is 28.4°C (83.1°F). Over the last 30 days, the average has been 28.9°C.
When is the water warmest in Fethiye?
The water is typically warmest in August, at around 29.5°C (85.1°F) in the 2023–2025 historical baseline.
When is the water coldest in Fethiye?
The water is typically coldest in March, at around 18.0°C (64.4°F) in the same historical baseline. A wetsuit is usually recommended during this period.
Can you swim in Fethiye today?
At 28.4°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 Fethiye.
View Snorkel Forecast →