Lake Cumberland — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Cumberland, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Cumberland today is 26°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 |
|---|---|---|---|
| AUG 4 | 26.6°C | 25.0°C | |
| AUG 5 | 26.7°C | 25.0°C | |
| AUG 6 | 25.2°C | 25.0°C | |
| AUG 7 | 25.2°C | 25.0°C | |
| AUG 8 | 25.2°C | 25.0°C | |
| AUG 9 | 25.4°C | 25.0°C | |
| AUG 10 | 25.9°C | 25.0°C | |
| AUG 11 | 25.9°C | 25.0°C | |
| AUG 12 | 25.0°C | 26.0°C | |
| AUG 13 | 25.0°C | 25.9°C | |
| AUG 14 | 25.0°C | 25.9°C | |
| AUG 15 | 25.0°C | 25.8°C | |
| AUG 16 | 25.0°C | 25.8°C | |
| AUG 17 | 25.0°C | 25.7°C | |
| AUG 18 | 25.0°C | 25.7°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 | 3°C | 7°C | 10°C |
| February | 3°C | 8°C | 12°C |
| March | 5°C | 10°C | 15°C |
| April | 11°C | 16°C | 21°C |
| May | 15°C | 19°C | 23°C |
| June | 19°C | 22°C | 25°C |
| July | 21°C | 24°C | 27°C |
| August | 22°C | 25°C | 28°C |
| September | 22°C | 25°C | 28°C |
| October | 19°C | 22°C | 25°C |
| November | 11°C | 15°C | 19°C |
| December | 6°C | 9°C | 12°C |
Lake Cumberland: Water Temperature by Location
Lake Cumberland: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
Lake Cumberland’s surface water temperatures vary considerably through the year because it is a large, deep reservoir in temperate Kentucky. In summer months (June–August) surface readings commonly range from about 75–85°F (24–29°C), sometimes approaching 86°F (30°C) on very warm days. Spring (March–May) temperatures are cooler, roughly 45–65°F (7–18°C), while autumn (September–November) typically falls between 55–70°F (13–21°C). Winter surface temperatures often sit near 34–45°F (1–7°C). Because the lake stratifies, deeper water can remain much colder—often in the 40s°F (4–10°C) even during summer—so temperature can change quickly with depth or in shaded coves.
Swimming is allowed at Lake Cumberland, particularly in designated beach and park areas maintained by state and local authorities, and the reservoir is a popular spot for recreational swimming in summer. Restrictions and posted advisories are used to protect swimmers; beaches may close temporarily for safety if water quality tests, algae blooms, high boat traffic, low water levels or hazardous currents create risks. The lake’s depth, sudden drop-offs and cold deeper water are reasons for caution, and swimmers are encouraged to use lifeguarded zones, life jackets, and to heed local rules and warnings.