Ustica Water Temperature
Updated Tue 14:18 (Europe/Rome)
Italy · Forecast updated Sep 22, 2026, 14:18 UTC
Current Sea Temperature
28.0°C
82.4°F
Very warm water
Valid Sep 22, 2026, 14:18 (Europe/Rome). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
1.7°C above
The typical September average is 26.3°C (79.3°F) from the historical baseline.
Recent trend
Cooling by 0.8°C
Seven-day average: 28.4°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.
Typical Sea Temperature Over the Year
In the historical baseline for Ustica, typical monthly averages range from about 15.0°C (59.0°F) in February to 28.3°C (82.9°F) in August.
Over the past 30 days, the average sea temperature in Ustica has been 29.4°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Ustica, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 15.7–16.3°C | 16.0°C / 60.8°F |
| February | 15.0–15.1°C | 15.0°C / 59.0°F |
| March | 15.0–15.9°C | 15.5°C / 59.9°F |
| April | 16.0–16.9°C | 16.6°C / 61.9°F |
| May | 19.0–19.9°C | 19.5°C / 67.1°F |
| June | 23.8–25.5°C | 24.4°C / 75.9°F |
| July | 27.6–28.1°C | 27.9°C / 82.2°F |
| August | 27.4–29.8°C | 28.3°C / 82.9°F |
| September | 25.9–26.5°C | 26.3°C / 79.3°F |
| October | 22.9–24.6°C | 23.5°C / 74.3°F |
| November | 20.2–21.2°C | 20.8°C / 69.4°F |
| December | 17.3–17.8°C | 17.5°C / 63.5°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (38.71, 13.21). 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.
Ustica in January
Typical January water temperature near Ustica is 16.0°C (60.8°F), with yearly monthly means from 15.7–16.3°C.
Ustica in February
Typical February water temperature near Ustica is 15.0°C (59.0°F), with yearly monthly means from 15.0–15.1°C.
Ustica in March
Typical March water temperature near Ustica is 15.5°C (59.9°F), with yearly monthly means from 15.0–15.9°C.
Ustica in April
Typical April water temperature near Ustica is 16.6°C (61.9°F), with yearly monthly means from 16.0–16.9°C.
Ustica in May
Typical May water temperature near Ustica is 19.5°C (67.1°F), with yearly monthly means from 19.0–19.9°C.
Ustica in June
Typical June water temperature near Ustica is 24.4°C (75.9°F), with yearly monthly means from 23.8–25.5°C.
Ustica in July
Typical July water temperature near Ustica is 27.9°C (82.2°F), with yearly monthly means from 27.6–28.1°C.
Ustica in August
Typical August water temperature near Ustica is 28.3°C (82.9°F), with yearly monthly means from 27.4–29.8°C.
Ustica in September
Typical September water temperature near Ustica is 26.3°C (79.3°F), with yearly monthly means from 25.9–26.5°C.
Ustica in October
Typical October water temperature near Ustica is 23.5°C (74.3°F), with yearly monthly means from 22.9–24.6°C.
Ustica in November
Typical November water temperature near Ustica is 20.8°C (69.4°F), with yearly monthly means from 20.2–21.2°C.
Ustica in December
Typical December water temperature near Ustica is 17.5°C (63.5°F), with yearly monthly means from 17.3–17.8°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 | 22.5°C / 72.5°F | 25.9°C / 78.5°F | 29.4°C / 84.9°F |
| July | 27.5°C / 81.5°F | 28.9°C / 84.0°F | 30.6°C / 87.1°F |
| August | 29.2°C / 84.6°F | 30.2°C / 86.3°F | 31.2°C / 88.2°F |
| September | 26.9°C / 80.4°F | 28.9°C / 84.1°F | 30.6°C / 87.1°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2735 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Ustica
Volcanic island marine reserve north of Palermo with vivid clear water.
- Area
- Sicily
Ustica Water Temperature: Common Questions
What is the water temperature in Ustica today?
The current sea surface temperature near Ustica is 28.0°C (82.4°F). Over the last 30 days, the average has been 29.4°C.
When is the water warmest in Ustica?
The water is typically warmest in August, at around 28.3°C (82.9°F) in the 2023–2025 historical baseline.
When is the water coldest in Ustica?
The water is typically coldest in February, 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 Ustica today?
At 28.0°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 Ustica.
View Snorkel Forecast →