INSTRUMENT / SEA TEMPERATURE
Ustica Water Temperature
Updated Fri 20:14 (Europe/Rome)
Italy · Forecast updated Nov 6, 2026, 20:14 UTC
Current Sea Temperature
20.9°C
69.6°F
Cool water
Valid Nov 6, 2026, 20:14 (Europe/Rome). 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 20.8°C (69.4°F) from the historical baseline.
Recent trend
Cooling by 1.0°C
Seven-day average: 21.5°C, versus 22.5°C in the prior seven days.
What to wear
Cool water
A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
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 23.1°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 2022–2025. 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 | 17.6°C / 63.7°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 2022–2025 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.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: December 17.6°C · February 15.0°C.
Explore Ustica sea temperature in January, including swim comfort and month comparisons →
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.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: January 16.0°C · March 15.5°C.
Explore Ustica sea temperature in February, including swim comfort and month comparisons →
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.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: February 15.0°C · April 16.6°C.
Explore Ustica sea temperature in March, including swim comfort and month comparisons →
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.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: March 15.5°C · May 19.5°C.
Explore Ustica sea temperature in April, including swim comfort and month comparisons →
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.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: April 16.6°C · June 24.4°C.
Explore Ustica sea temperature in May, including swim comfort and month comparisons →
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.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: May 19.5°C · July 27.9°C.
Explore Ustica sea temperature in June, including swim comfort and month comparisons →
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.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: June 24.4°C · August 28.3°C.
Explore Ustica sea temperature in July, including swim comfort and month comparisons →
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.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: July 27.9°C · September 26.3°C.
Explore Ustica sea temperature in August, including swim comfort and month comparisons →
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.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: August 28.3°C · October 23.5°C.
Explore Ustica sea temperature in September, including swim comfort and month comparisons →
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.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: September 26.3°C · November 20.8°C.
Explore Ustica sea temperature in October, including swim comfort and month comparisons →
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.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: October 23.5°C · December 17.6°C.
Explore Ustica sea temperature in November, including swim comfort and month comparisons →
Ustica in December
Typical December water temperature near Ustica is 17.6°C (63.7°F), with yearly monthly means from 17.3–17.8°C.
Swimming and snorkeling: cold water. Use a full 3-5 mm wetsuit and keep the session within your cold-water experience.
Adjacent months: November 20.8°C · January 16.0°C.
Explore Ustica 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 | 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 | 25.8°C / 78.4°F | 28.5°C / 83.2°F | 30.6°C / 87.1°F |
| October | 22.0°C / 71.6°F | 24.0°C / 75.1°F | 26.0°C / 78.8°F |
| November | 20.7°C / 69.3°F | 21.2°C / 70.2°F | 22.0°C / 71.6°F |
Partial coverage: 6 calendar months with records. Profile calculated from 3821 hourly forecast records across 6 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 20.9°C (69.6°F). Over the last 30 days, the average has been 23.1°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 2022–2025 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 20.9°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 →