Lake Jacomo — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Jacomo, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Jacomo today is 30°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. 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 |
|---|---|---|---|
| JUL 14 | 26.3°C | 30.0°C | |
| JUL 15 | 28.6°C | 30.0°C | |
| JUL 16 | 28.6°C | 30.0°C | |
| JUL 17 | 28.8°C | 30.0°C | |
| JUL 18 | 29.7°C | 30.0°C | |
| JUL 19 | 29.9°C | 30.0°C | |
| JUL 20 | 30.0°C | 30.0°C | |
| JUL 21 | 30.0°C | 30.0°C | |
| JUL 22 | 30.0°C | 30.0°C | |
| JUL 23 | 30.0°C | 30.0°C | |
| JUL 24 | 30.0°C | 30.0°C | |
| JUL 25 | 30.0°C | 30.0°C | |
| JUL 26 | 30.0°C | 30.0°C | |
| JUL 27 | 30.0°C | 30.0°C | |
| JUL 28 | 30.0°C | 30.0°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 | 0°C | 3°C | 5°C |
| February | 0°C | 3°C | 6°C |
| March | 2°C | 10°C | 18°C |
| April | 9°C | 14°C | 20°C |
| May | 15°C | 20°C | 25°C |
| June | 21°C | 24°C | 27°C |
| July | 25°C | 30°C | 35°C |
| August | 23°C | 27°C | 31°C |
| September | 21°C | 25°C | 29°C |
| October | 15°C | 20°C | 24°C |
| November | 5°C | 11°C | 17°C |
| December | 1°C | 3°C | 6°C |
Lake Jacomo: Water Temperature by Location
Lake Jacomo: Weather Forecast
July 22
July 23
July 24
July 25
July 26
Location & Local Information
Lake Jacomo’s water temperature follows a typical Midwestern reservoir pattern, warming through spring and peaking in mid to late summer. Surface temperatures in winter commonly hover near freezing, roughly 32–40 °F (0–4 °C). During spring the lake generally warms to about 40–60 °F (4–16 °C) as air temperatures rise. In summer, surface readings often reach the 70–82 °F range (21–28 °C), with occasional heat-wave spikes a few degrees higher. By autumn the water cools again, commonly falling into a 50–70 °F band (10–21 °C). Actual temperatures vary by depth, time of day and recent weather; shallow bays warm fastest while deeper areas stay cooler, and cold fronts can quickly drop surface readings.
Lake Jacomo is not a designated swim beach and public swimming is effectively not permitted under park rules, so it’s not managed for recreational bathing. The county emphasizes boating and fishing as primary uses; absence of lifeguards, boat traffic, submerged hazards and variable water quality are among the reasons formal swimming is discouraged. People sometimes wade or enter the water at their own risk, and in winter any ice should be treated as unsafe unless officially declared solid; visitors should follow posted regulations and exercise caution around the shoreline.