Clear Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Clear Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Clear Lake today is 26.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 |
|---|---|---|---|
| JUL 14 | 21.7°C | 21.8°C | |
| JUL 15 | 23.7°C | 21.8°C | |
| JUL 16 | 23.8°C | 21.8°C | |
| JUL 17 | 23.9°C | 21.8°C | |
| JUL 18 | 23.9°C | 21.8°C | |
| JUL 19 | 23.9°C | 21.8°C | |
| JUL 20 | 23.7°C | 21.8°C | |
| JUL 21 | 24.1°C | 21.8°C | |
| JUL 22 | 21.8°C | 26.3°C | |
| JUL 23 | 21.8°C | 26.0°C | |
| JUL 24 | 21.8°C | 25.8°C | |
| JUL 25 | 21.8°C | 25.6°C | |
| JUL 26 | 21.8°C | 25.3°C | |
| JUL 27 | 21.8°C | 25.1°C | |
| JUL 28 | 21.8°C | 24.9°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 | 6°C | 12°C |
| February | 0°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 | 19°C | 22°C |
| July | 17°C | 22°C | 27°C |
| August | 20°C | 24°C | 28°C |
| September | 17°C | 20°C | 22°C |
| October | 5°C | 12°C | 18°C |
| November | 3°C | 7°C | 10°C |
| December | 1°C | 6°C | 11°C |
Clear Lake: Water Temperature by Location
Clear Lake: Weather Forecast
July 22
July 23
July 24
July 25
July 26
Location & Local Information
Clear Lake in eastern South Dakota follows the patterns of shallow prairie lakes, so its surface temperatures change a lot through the year. In winter the lake usually freezes and surface water sits at or very near freezing, about 32°F (0°C) with slightly warmer, near‑freezing water beneath the ice. During spring and early summer the surface warms from roughly 40–65°F (4–18°C) as snowmelt and cool nights moderate temperatures. Peak summer conditions commonly bring surface temperatures into the 70–80°F range (21–27°C), and during hot, calm spells the shallow areas can approach the mid‑80s °F (around 29°C). As fall sets in the water cools back toward the 50s–60s °F (10–16°C).
Swimming is typically allowed at Clear Lake where public beaches or access points exist because it is used for recreation, but actual access depends on local rules, posted signage, and water‑quality or safety advisories. In summer the warmed surface layers are suitable for casual swimming, while in winter ice cover makes swimming unsafe except for supervised or organized winter events. Visitors should check current local guidance about bacteria blooms, nuisance weeds, lifeguard coverage, and ice thickness before entering the water.