Lake Iseo — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Iseo, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Iseo today is 21.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| SEP 13 | 21.9°C | 19.8°C | |
| SEP 14 | 21.7°C | 19.8°C | |
| SEP 15 | 21.6°C | 19.8°C | |
| SEP 16 | 22.2°C | 19.8°C | |
| SEP 17 | 22.1°C | 19.8°C | |
| SEP 18 | 22.3°C | 19.8°C | |
| SEP 19 | 22.0°C | 19.8°C | |
| SEP 20 | 21.7°C | 19.8°C | |
| SEP 21 | 19.8°C | 21.6°C | |
| SEP 22 | 19.8°C | 21.5°C | |
| SEP 23 | 19.8°C | 21.4°C | |
| SEP 24 | 19.8°C | 21.3°C | |
| SEP 25 | 19.8°C | 21.2°C | |
| SEP 26 | 19.8°C | 21.1°C | |
| SEP 27 | 19.8°C | 21.0°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 4°C | 9°C | 13°C |
| February | 5°C | 9°C | 12°C |
| March | 8°C | 12°C | 15°C |
| April | 10°C | 14°C | 18°C |
| May | 11°C | 17°C | 22°C |
| June | 16°C | 21°C | 26°C |
| July | 18°C | 23°C | 28°C |
| August | 18°C | 24°C | 30°C |
| September | 14°C | 20°C | 26°C |
| October | 12°C | 17°C | 20°C |
| November | 7°C | 11°C | 15°C |
| December | 6°C | 10°C | 13°C |
Lake Iseo: Water Temperature by Location
Lake Iseo: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Lake Iseo (Lago d’Iseo) is a subalpine lake in Lombardy whose surface temperatures vary with the seasons and local weather. In winter the water typically drops to about 4–8 °C (39–46 °F). Spring temperatures climb to roughly 8–16 °C (46–61 °F) as the lake warms, while the main bathing season in summer generally sees surface temperatures around 20–26 °C (68–79 °F). Early autumn usually brings a gradual cooling to about 12–18 °C (54–64 °F). These figures are averages for popular bathing areas and can change with depth, wind and inflow from tributaries.
Swimming is allowed and commonly practiced, especially from public beaches, lidos and designated bathing spots around towns such as Sarnico, Iseo and Monte Isola, where facilities and seasonal lifeguards may be available. Authorities permit swimming because water quality is monitored and generally suitable for recreation, but local rules can restrict bathing in harbours, near boat channels or at intakes for safety reasons. Visitors should follow posted signage, use marked swimming zones to avoid boat traffic, and exercise caution when water is cool despite warm air temperatures.