Fox River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Fox River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Fox River today is 21.9°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 14 | 22.1°C | 18.0°C | |
| SEP 15 | 22.1°C | 18.0°C | |
| SEP 16 | 21.1°C | 18.0°C | |
| SEP 17 | 22.2°C | 18.0°C | |
| SEP 18 | 21.5°C | 18.0°C | |
| SEP 19 | 21.9°C | 18.0°C | |
| SEP 20 | 21.8°C | 18.0°C | |
| SEP 21 | 21.9°C | 18.0°C | |
| SEP 22 | 18.0°C | 21.7°C | |
| SEP 23 | 18.0°C | 21.5°C | |
| SEP 24 | 18.0°C | 21.3°C | |
| SEP 25 | 18.0°C | 21.1°C | |
| SEP 26 | 18.0°C | 20.9°C | |
| SEP 27 | 18.0°C | 20.7°C | |
| SEP 28 | 18.0°C | 20.5°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 | 1°C | 5°C | 9°C |
| February | 1°C | 5°C | 9°C |
| March | 3°C | 7°C | 11°C |
| April | 5°C | 10°C | 16°C |
| May | 8°C | 15°C | 22°C |
| June | 14°C | 20°C | 25°C |
| July | 17°C | 23°C | 30°C |
| August | 17°C | 22°C | 27°C |
| September | 11°C | 18°C | 25°C |
| October | 8°C | 16°C | 23°C |
| November | 3°C | 8°C | 16°C |
| December | 1°C | 5°C | 8°C |
Fox River: Water Temperature by Location
Fox River: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Source:
• location 1 mi (1.6 km) southeast of Colgate, Wisconsin
• elevation 942.78 ft (287.36 m)
Mouth:
• location Illinois River at Ottawa, Illinois
• elevation 460.28 ft (140.29 m)
Length 202 mi (325 km)
The Fox River, which runs through Illinois and Wisconsin, is a relatively popular waterway for outdoor activities, especially boating, fishing, and kayaking. The water temperature in the Fox River can fluctuate significantly depending on the season. During the summer months, particularly from June to August, the river water typically warms up to around 70°F to 80°F (21°C to 27°C), making it more comfortable for water activities, including swimming. However, while the warmer temperatures may seem inviting, the river’s current and occasional murky water can make swimming more challenging and less ideal for some.
In the cooler months, especially in early spring and fall, the water temperature in the Fox River can drop to around 50°F to 60°F (10°C to 15°C). The colder temperatures, combined with the faster-moving currents, can make swimming in the river much less appealing and even dangerous in certain areas. Additionally, the river’s flow can vary greatly depending on rainfall and dam operations, so water levels and current speed can change, posing a risk for swimmers.
Although the Fox River may not be the first choice for swimming due to its fluctuating conditions, it is still enjoyed by many for other recreational activities. Kayakers, boaters, and anglers frequently visit the river for its ample fishing spots and scenic views. For those who do wish to swim, it’s best to seek out calmer stretches or find designated swimming areas near parks or public access points where the water is cleaner and safer.