Terni — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Terni, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Terni today is 21.4°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 | 22.8°C | 19.0°C | |
| SEP 14 | 22.8°C | 19.0°C | |
| SEP 15 | 21.9°C | 19.0°C | |
| SEP 16 | 21.7°C | 19.0°C | |
| SEP 17 | 21.6°C | 19.0°C | |
| SEP 18 | 21.4°C | 19.0°C | |
| SEP 19 | 21.4°C | 19.0°C | |
| SEP 20 | 21.3°C | 19.0°C | |
| SEP 21 | 19.0°C | 21.3°C | |
| SEP 22 | 19.0°C | 21.2°C | |
| SEP 23 | 19.0°C | 21.0°C | |
| SEP 24 | 19.0°C | 20.9°C | |
| SEP 25 | 19.0°C | 20.8°C | |
| SEP 26 | 19.0°C | 20.7°C | |
| SEP 27 | 19.0°C | 20.6°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 | 6°C | 9°C | 12°C |
| February | 6°C | 9°C | 12°C |
| March | 8°C | 11°C | 14°C |
| April | 9°C | 13°C | 16°C |
| May | 11°C | 16°C | 20°C |
| June | 14°C | 19°C | 25°C |
| July | 17°C | 22°C | 27°C |
| August | 17°C | 22°C | 28°C |
| September | 14°C | 19°C | 24°C |
| October | 12°C | 16°C | 18°C |
| November | 9°C | 12°C | 15°C |
| December | 6°C | 9°C | 12°C |
Terni: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Terni’s closest lake, Lago di Piediluco, sits in the Umbrian hills and is the main local spot for open-water recreation. Surface temperatures vary with the seasons: in spring (April–May) waters typically range from about 10–18 °C (50–64 °F), in summer (June–August) they warm to roughly 20–26 °C (68–79 °F), in autumn (September–October) they cool to around 12–20 °C (54–68 °F), and in winter (November–March) temperatures commonly fall to about 4–10 °C (39–50 °F). These figures are approximate and can change with weather, recent rainfall and depth, as deeper parts remain noticeably colder than the shallows.
Swimming is generally allowed in designated areas of Lago di Piediluco and is popular in the warmer months because of the lake’s accessible shoreline and relatively calm water. Restrictions can apply near infrastructure, such as hydroelectric outlets or boating zones, and swimming close to the nearby Marmore Falls or in fast-flowing sections of the Nera River is unsafe and often prohibited due to strong currents and variable flows. Local signage and municipal rules govern bathing times and permitted spots, and occasional advisories may be issued for water quality or safety, so checking current local information before entering the water is advisable.