Horseshoe Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Horseshoe Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Horseshoe Lake today is 17.5°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 14 | 19.2°C | 21.1°C | |
| SEP 15 | 18.6°C | 21.1°C | |
| SEP 16 | 18.2°C | 21.1°C | |
| SEP 17 | 18.1°C | 21.1°C | |
| SEP 18 | 17.8°C | 21.1°C | |
| SEP 19 | 18.1°C | 21.1°C | |
| SEP 20 | 17.8°C | 21.1°C | |
| SEP 21 | 17.5°C | 21.1°C | |
| SEP 22 | 21.1°C | 17.7°C | |
| SEP 23 | 21.1°C | 17.9°C | |
| SEP 24 | 21.1°C | 18.0°C | |
| SEP 25 | 21.1°C | 18.2°C | |
| SEP 26 | 21.1°C | 18.4°C | |
| SEP 27 | 21.1°C | 18.6°C | |
| SEP 28 | 21.1°C | 18.8°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 | 7°C | 12°C |
| February | 1°C | 8°C | 15°C |
| March | 0°C | 9°C | 17°C |
| April | 2°C | 11°C | 20°C |
| May | 7°C | 14°C | 21°C |
| June | 14°C | 18°C | 22°C |
| July | 17°C | 22°C | 28°C |
| August | 20°C | 24°C | 28°C |
| September | 17°C | 21°C | 26°C |
| October | 5°C | 12°C | 18°C |
| November | 3°C | 7°C | 10°C |
| December | 1°C | 6°C | 11°C |
Horseshoe Lake: Water Temperature by Location
Horseshoe Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Horseshoe Lake in South Dakota typically follows the seasonal patterns of prairie lakes, with cold springs, warm summers and ice cover in winter. Surface water temperatures in spring often range from about 40–60°F (4–15°C) as the lake mixes and warms. By early summer temperatures commonly climb into the 60s–70s°F (15–24°C), and at peak summer the surface can reach the mid-70s to low 80s°F (24–28°C) on warm, sunny days—shallower areas warm fastest. In autumn the lake cools back through the 50s–60s°F (10–16°C) and drops toward freezing by late fall. In winter the water hovers near 32°F (0°C) under ice when the surface is frozen.
Swimming at Horseshoe Lake is generally possible where public access points or beaches exist, and many people swim in summer when surface temperatures are most comfortable. Whether swimming is allowed at a particular spot depends on local regulations, posted signs and current water-quality conditions; authorities may restrict access during harmful algal blooms, contamination events or when ice makes swimming unsafe. Cold spring or autumn water can pose cold‑water shock or hypothermia risks even when air temperatures feel mild, so visitors should heed advisories, use common-sense safety measures and check local notices before entering the water.