Iowa City — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Iowa City, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Iowa City today is 20.7°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 14 | 20.7°C | 17.3°C | |
| SEP 15 | 21.1°C | 17.3°C | |
| SEP 16 | 20.6°C | 17.3°C | |
| SEP 17 | 20.8°C | 17.3°C | |
| SEP 18 | 20.4°C | 17.3°C | |
| SEP 19 | 21.0°C | 17.3°C | |
| SEP 20 | 20.6°C | 17.3°C | |
| SEP 21 | 20.7°C | 17.3°C | |
| SEP 22 | 17.3°C | 20.5°C | |
| SEP 23 | 17.3°C | 20.4°C | |
| SEP 24 | 17.3°C | 20.2°C | |
| SEP 25 | 17.3°C | 20.0°C | |
| SEP 26 | 17.3°C | 19.9°C | |
| SEP 27 | 17.3°C | 19.7°C | |
| SEP 28 | 17.3°C | 19.5°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 | 2°C | 7°C | 11°C |
| April | 5°C | 10°C | 16°C |
| May | 8°C | 15°C | 22°C |
| June | 14°C | 19°C | 24°C |
| July | 17°C | 23°C | 28°C |
| August | 17°C | 21°C | 26°C |
| September | 11°C | 17°C | 24°C |
| October | 8°C | 15°C | 22°C |
| November | 3°C | 10°C | 17°C |
| December | 2°C | 5°C | 8°C |
Iowa City: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
In Iowa City, Iowa, the Iowa River runs through the heart of the city, offering some opportunities for water-based activities. However, similar to other rivers in the area, swimming in the Iowa River is generally not recommended due to strong currents and water quality concerns. During the summer months, the river's water temperature can rise to around 70°F to 80°F (21°C to 27°C), which might seem inviting, but the water quality often fluctuates with rainfall and runoff from surrounding areas, affecting its safety for recreational swimming.
The Iowa River's flow can be swift, especially after storms or during spring runoff, making swimming dangerous in many areas. While there may be some calm spots where people might wade or cool off, the current risks and water quality are significant concerns. Additionally, pollution, including bacteria from agricultural runoff, can compromise the water's cleanliness and make it unsafe for contact recreation.
Though the Iowa River might not be ideal for swimming, Iowa City offers alternative ways to enjoy water activities. Local parks, lakes, and swimming pools provide safer options for swimming, including the popular Coralville Lake located just outside of Iowa City, which is known for its designated swimming areas. For those looking for a river experience, kayaking, canoeing, and fishing on the Iowa River are popular activities and can be enjoyed with proper safety precautions.