Skiathos Water Temperature
Updated Thu 06:39 (Europe/Athens)
Greece · Forecast updated Sep 24, 2026, 06:39 UTC
Current Sea Temperature
23.8°C
74.8°F
Mild water
Valid Sep 24, 2026, 06:39 (Europe/Athens). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
1.4°C below
The typical September average is 25.2°C (77.4°F) from the historical baseline.
Recent trend
Cooling by 0.8°C
Seven-day average: 24.4°C, versus 25.1°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 Skiathos, typical monthly averages range from about 15.0°C (59.0°F) in March to 26.9°C (80.4°F) in July.
Over the past 30 days, the average sea temperature in Skiathos has been 25.7°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Skiathos, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 14.8–16.7°C | 15.6°C / 60.1°F |
| February | 15.1–15.8°C | 15.4°C / 59.7°F |
| March | 14.6–15.6°C | 15.0°C / 59.0°F |
| April | 15.6–17.5°C | 16.3°C / 61.3°F |
| May | 17.3–19.2°C | 18.2°C / 64.8°F |
| June | 22.7–24.6°C | 23.6°C / 74.5°F |
| July | 26.4–27.9°C | 26.9°C / 80.4°F |
| August | 25.9–27.9°C | 26.8°C / 80.2°F |
| September | 24.7–26.1°C | 25.2°C / 77.4°F |
| October | 22.0–23.2°C | 22.8°C / 73.0°F |
| November | 19.0–20.4°C | 19.7°C / 67.5°F |
| December | 16.6–17.6°C | 17.1°C / 62.8°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (39.13, 23.46). 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.
Skiathos in January
Typical January water temperature near Skiathos is 15.6°C (60.1°F), with yearly monthly means from 14.8–16.7°C.
Skiathos in February
Typical February water temperature near Skiathos is 15.4°C (59.7°F), with yearly monthly means from 15.1–15.8°C.
Skiathos in March
Typical March water temperature near Skiathos is 15.0°C (59.0°F), with yearly monthly means from 14.6–15.6°C.
Skiathos in April
Typical April water temperature near Skiathos is 16.3°C (61.3°F), with yearly monthly means from 15.6–17.5°C.
Skiathos in May
Typical May water temperature near Skiathos is 18.2°C (64.8°F), with yearly monthly means from 17.3–19.2°C.
Skiathos in June
Typical June water temperature near Skiathos is 23.6°C (74.5°F), with yearly monthly means from 22.7–24.6°C.
Skiathos in July
Typical July water temperature near Skiathos is 26.9°C (80.4°F), with yearly monthly means from 26.4–27.9°C.
Skiathos in August
Typical August water temperature near Skiathos is 26.8°C (80.2°F), with yearly monthly means from 25.9–27.9°C.
Skiathos in September
Typical September water temperature near Skiathos is 25.2°C (77.4°F), with yearly monthly means from 24.7–26.1°C.
Skiathos in October
Typical October water temperature near Skiathos is 22.8°C (73.0°F), with yearly monthly means from 22.0–23.2°C.
Skiathos in November
Typical November water temperature near Skiathos is 19.7°C (67.5°F), with yearly monthly means from 19.0–20.4°C.
Skiathos in December
Typical December water temperature near Skiathos is 17.1°C (62.8°F), with yearly monthly means from 16.6–17.6°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 | 22.1°C / 71.8°F | 24.4°C / 75.9°F | 25.8°C / 78.4°F |
| July | 25.2°C / 77.4°F | 26.9°C / 80.5°F | 29.0°C / 84.2°F |
| August | 25.3°C / 77.5°F | 26.7°C / 80.1°F | 28.3°C / 82.9°F |
| September | 23.5°C / 74.3°F | 25.3°C / 77.5°F | 27.2°C / 81.0°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2775 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Skiathos
Sporades island with pine-backed coves and clear turquoise water.
- Area
- Sporades
Skiathos Water Temperature: Common Questions
What is the water temperature in Skiathos today?
The current sea surface temperature near Skiathos is 23.8°C (74.8°F). Over the last 30 days, the average has been 25.7°C.
When is the water warmest in Skiathos?
The water is typically warmest in July, at around 26.9°C (80.4°F) in the 2023–2025 historical baseline.
When is the water coldest in Skiathos?
The water is typically coldest in March, at around 15.0°C (59.0°F) in the same historical baseline. A wetsuit is usually recommended during this period.
Can you swim in Skiathos today?
At 23.8°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 Skiathos.
View Snorkel Forecast →