Updated Tue 15:27 (Europe/Istanbul)
Turkey · Forecast updated Sep 22, 2026, 15:27 UTC
Current Sea Temperature
28.9°C
84.0°F
Very warm water
Valid Sep 22, 2026, 15:27 (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 28.6°C (83.5°F) from the historical baseline.
Recent trend
Cooling by 0.3°C
Seven-day average: 28.8°C, versus 29.1°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.
In the historical baseline for Kas, typical monthly averages range from about 18.0°C (64.4°F) in March to 29.8°C (85.6°F) in August.
Over the past 30 days, the average sea temperature in Kas has been 29.1°C.
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Kas, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 19.1–20.3°C | 19.5°C / 67.1°F |
| February | 17.8–19.2°C | 18.5°C / 65.3°F |
| March | 17.4–18.9°C | 18.0°C / 64.4°F |
| April | 18.0–19.9°C | 18.7°C / 65.7°F |
| May | 20.4–21.8°C | 21.2°C / 70.2°F |
| June | 24.1–26.7°C | 25.4°C / 77.7°F |
| July | 28.0–29.2°C | 28.5°C / 83.3°F |
| August | 29.5–30.1°C | 29.8°C / 85.6°F |
| September | 28.6–28.7°C | 28.6°C / 83.5°F |
| October | 25.5–26.6°C | 26.1°C / 79.0°F |
| November | 23.0–24.2°C | 23.6°C / 74.5°F |
| December | 20.2–21.8°C | 21.2°C / 70.2°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (36.21, 29.63). Each month is the mean of yearly monthly means; the range is the lowest and highest of those yearly monthly means. Open-Meteo methodology.
Each month uses the 2023–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Typical January water temperature near Kas is 19.5°C (67.1°F), with yearly monthly means from 19.1–20.3°C.
Typical February water temperature near Kas is 18.5°C (65.3°F), with yearly monthly means from 17.8–19.2°C.
Typical March water temperature near Kas is 18.0°C (64.4°F), with yearly monthly means from 17.4–18.9°C.
Typical April water temperature near Kas is 18.7°C (65.7°F), with yearly monthly means from 18.0–19.9°C.
Typical May water temperature near Kas is 21.2°C (70.2°F), with yearly monthly means from 20.4–21.8°C.
Typical June water temperature near Kas is 25.4°C (77.7°F), with yearly monthly means from 24.1–26.7°C.
Typical July water temperature near Kas is 28.5°C (83.3°F), with yearly monthly means from 28.0–29.2°C.
Typical August water temperature near Kas is 29.8°C (85.6°F), with yearly monthly means from 29.5–30.1°C.
Typical September water temperature near Kas is 28.6°C (83.5°F), with yearly monthly means from 28.6–28.7°C.
Typical October water temperature near Kas is 26.1°C (79.0°F), with yearly monthly means from 25.5–26.6°C.
Typical November water temperature near Kas is 23.6°C (74.5°F), with yearly monthly means from 23.0–24.2°C.
Typical December water temperature near Kas is 21.2°C (70.2°F), with yearly monthly means from 20.2–21.8°C.
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 |
|---|---|---|---|
| January | 18.4°C / 65.1°F | 19.4°C / 66.8°F | 20.5°C / 68.9°F |
| February | 17.6°C / 63.7°F | 18.0°C / 64.5°F | 18.6°C / 65.5°F |
| March | 17.5°C / 63.5°F | 17.9°C / 64.2°F | 18.3°C / 64.9°F |
| April | 17.3°C / 63.1°F | 18.2°C / 64.8°F | 20.0°C / 68.0°F |
| May | 18.3°C / 64.9°F | 20.4°C / 68.7°F | 23.5°C / 74.3°F |
| June | 22.2°C / 72.0°F | 25.2°C / 77.4°F | 27.9°C / 82.2°F |
| July | 26.4°C / 79.5°F | 28.6°C / 83.4°F | 30.1°C / 86.2°F |
| August | 28.2°C / 82.8°F | 29.4°C / 85.0°F | 30.5°C / 86.9°F |
| September | 27.1°C / 80.8°F | 28.5°C / 83.4°F | 29.6°C / 85.3°F |
| October | 24.5°C / 76.1°F | 25.5°C / 78.0°F | 27.5°C / 81.5°F |
| November | 22.5°C / 72.5°F | 23.6°C / 74.4°F | 24.5°C / 76.1°F |
| December | 20.5°C / 68.9°F | 21.6°C / 70.9°F | 22.5°C / 72.5°F |
Profile calculated from 9049 hourly forecast records across 13 monthly periods. This is a growing archive, not a long-term climate normal.
Turquoise coast with excellent visibility
The current sea surface temperature near Kas is 28.9°C (84.0°F). Over the last 30 days, the average has been 29.1°C.
The water is typically warmest in August, at around 29.8°C (85.6°F) in the 2023–2025 historical baseline.
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.
At 28.9°C, the water is usually comfortable for swimming and snorkeling.
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