Sioux Falls — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Sioux Falls, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Sioux Falls 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 |
|---|---|---|---|
| JUN 23 | 20.3°C | 18.7°C | |
| JUN 24 | 20.2°C | 18.7°C | |
| JUN 25 | 20.3°C | 18.7°C | |
| JUN 26 | 20.7°C | 18.7°C | |
| JUN 27 | 20.8°C | 18.7°C | |
| JUN 28 | 20.8°C | 18.7°C | |
| JUN 29 | 21.0°C | 18.7°C | |
| JUN 30 | 21.4°C | 18.7°C | |
| JUL 1 | 20.0°C | 21.3°C | |
| JUL 2 | 20.0°C | 21.3°C | |
| JUL 3 | 20.0°C | 21.2°C | |
| JUL 4 | 20.0°C | 21.1°C | |
| JUL 5 | 20.0°C | 21.1°C | |
| JUL 6 | 20.0°C | 21.0°C | |
| JUL 7 | 20.0°C | 20.9°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 | 0°C | 6°C | 11°C |
| April | 4°C | 10°C | 16°C |
| May | 8°C | 13°C | 21°C |
| June | 14°C | 19°C | 24°C |
| July | 17°C | 20°C | 24°C |
| August | 17°C | 21°C | 24°C |
| September | 11°C | 16°C | 21°C |
| October | 8°C | 14°C | 20°C |
| November | 3°C | 10°C | 16°C |
| December | 0°C | 4°C | 8°C |
Sioux Falls: Weather Forecast
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July 4
Location & Local Information
In Sioux Falls, South Dakota, the Big Sioux River runs through the city and serves as a key natural feature for recreation. During the summer months, the water temperature in the Big Sioux River typically ranges from 70°F to 80°F (21°C to 27°C), making it reasonably comfortable for activities like wading or kayaking. While it is not as warm as rivers in southern states, the temperatures are still pleasant enough for short swims and other water activities, particularly on hot summer days.
However, swimming in the Big Sioux River itself is not always recommended due to varying water conditions. The river can experience strong currents and varying water depths, especially in areas near the falls or during periods of heavy rainfall. These conditions make swimming potentially dangerous for those who are not experienced or unaware of the changing water levels. It is important to check water conditions before entering, and it's advisable to swim only in designated, safer areas.
For those seeking water recreation, Sioux Falls offers several designated parks and recreational areas along the Big Sioux River, such as Falls Park. These areas provide opportunities for picnicking, relaxing by the river, and enjoying the scenic beauty of the riverbanks. Though swimming may not be the most common activity, kayaking, canoeing, and tubing are popular options, allowing visitors to enjoy the river’s waters in a controlled manner. Overall, while the Big Sioux River in Sioux Falls offers various outdoor activities, swimming should be approached with caution, and visitors are encouraged to explore safer, designated areas.