Rock River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Rock River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Rock River today is 16.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 25 | 16.5°C | 16.8°C | |
| SEP 26 | 16.4°C | 16.8°C | |
| SEP 27 | 16.7°C | 16.8°C | |
| SEP 28 | 16.6°C | 16.8°C | |
| SEP 29 | 16.8°C | 16.8°C | |
| SEP 30 | 17.1°C | 16.8°C | |
| OCT 1 | 16.7°C | 14.0°C | |
| OCT 2 | 15.6°C | 14.0°C | |
| OCT 3 | 14.0°C | 16.4°C | |
| OCT 4 | 14.0°C | 16.3°C | |
| OCT 5 | 14.0°C | 16.1°C | |
| OCT 6 | 14.0°C | 16.0°C | |
| OCT 7 | 14.0°C | 15.9°C | |
| OCT 8 | 14.0°C | 15.8°C | |
| OCT 9 | 14.0°C | 15.6°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 | 0°C | 5°C | 9°C |
| February | 0°C | 5°C | 9°C |
| March | 2°C | 7°C | 11°C |
| April | 4°C | 11°C | 16°C |
| May | 7°C | 14°C | 21°C |
| June | 14°C | 19°C | 22°C |
| July | 17°C | 22°C | 28°C |
| August | 17°C | 21°C | 25°C |
| September | 11°C | 17°C | 23°C |
| October | 8°C | 14°C | 20°C |
| November | 3°C | 8°C | 16°C |
| December | 1°C | 5°C | 8°C |
Rock River: Water Temperature by Location
Rock River: Weather Forecast
October 3
October 4
October 5
October 6
October 7
October 8
Location & Local Information
Source:
• location Horicon Marsh north of Horicon, Wisconsin
Mouth:
• location Confluence with the Mississippi River at Rock Island, Illinois
• elevation 551 ft (168 m)
Length 299 mi (481 km)
The Rock River, flowing through Wisconsin and Illinois, offers a range of opportunities for outdoor activities, including swimming. The water temperature in the river can fluctuate depending on the season, with summer months typically bringing the warmest temperatures. During peak summer, the water can reach temperatures between 70°F and 80°F (21°C to 27°C), making it suitable for swimming in several stretches of the river. However, it's important to note that the water temperature can be cooler in spring and fall, especially in upstream areas where the river's flow is influenced by nearby cold-water springs.
Swimmers can enjoy the Rock River in designated parks and recreational areas, where the river is often calmer and more accessible for safe swimming. These areas are typically monitored for water quality, and local authorities may provide information on the safety of the water for swimming. However, due to the river's varying depths and currents, swimmers should be cautious, particularly in regions with faster-moving water or where the river widens. As with all natural bodies of water, it's essential to be aware of potential hazards and to check for any advisories before swimming.