Italy — Water Temperature in Seas, Lakes and Rivers
Check today’s water temperatures across Italy, including seas, lakes, and rivers. View real-time updates and seasonal ranges for both coastal and inland waters. We find every place where you can swim and show you the water temperature there today and throughout the year.
Sea Water Temperature Along the Coast
Chart of Average Temperature Changes Over the Last 60 Days
Places with the Warmest Sea Water Today
The Most Popular Seaside Places
Coastal Seas and Oceans
Water Temperature in Lakes and Rivers
Popular Lakes
Popular Rivers
Popular Places
Water Temperature and Swimming Overview
Regions and Map
Water Temperature Trends
Italy’s coastal waters vary with region and season, reflecting its long Mediterranean coastline. In winter the sea temperature typically ranges from about 12–16 °C (54–61 °F) along most coasts, cooler in the far north and slightly warmer in the southern Ionian and Sicily. By summer, surface temperatures commonly reach 22–28 °C (72–82 °F), with the warmest values often found in southern seas and enclosed gulfs; the northern Adriatic can also become quite warm during heat spells. Transitional spring and autumn months see gradual changes, usually between 15–22 °C (59–72 °F). These conditions make coastal swimming widely popular in summer, supported by many staffed beaches and tourist facilities, while off-season swimming is possible but colder and more dependent on local weather, currents and water quality.
Swimming Conditions
Inland waters show stronger contrasts: large northern lakes such as Garda, Como and Maggiore warm to about 20–24 °C (68–75 °F) in summer, sometimes reaching 25 °C (77 °F) in heat, but drop to single digits in winter, around 4–8 °C (39–46 °F). Alpine and high-altitude lakes remain cooler year-round, often 12–18 °C (54–64 °F) in summer. Rivers are typically colder and faster in mountain areas (around 4–12 °C / 39–54 °F) while lowland rivers like parts of the Po may warm to 18–25 °C (64–77 °F) in summer. Swimming is generally allowed in designated coastal and lake areas; however, safety depends on factors such as water quality, lifeguard presence, currents, jellyfish occurrences and seasonal restrictions imposed after storms or pollution events. Visitors should follow local signage and advisories to avoid hazards and health risks.