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 42°F.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 41°F (5°C) to 47°F (8°C). This water temperature is still quite low, and swimming in such conditions may only be comfortable for hardened individuals. It is recommended to limit the time spent in the water to avoid hypothermia. For those not accustomed to cold water, it is better to refrain from swimming. However, if you decide to enter the water, it is advisable to wear a warm wetsuit for protection against the cold. 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 |
|---|---|---|---|
| JAN 15 | 47°F | 45°F | |
| JAN 16 | 47°F | 45°F | |
| JAN 17 | 45°F | 45°F | |
| JAN 18 | 45°F | 45°F | |
| JAN 19 | 45°F | 45°F | |
| JAN 20 | 45°F | 45°F | |
| JAN 21 | 45°F | 45°F | |
| JAN 22 | 42°F | 45°F | |
| JAN 23 | 45°F | 42°F | |
| JAN 24 | 45°F | 42°F | |
| JAN 25 | 45°F | 43°F | |
| JAN 26 | 45°F | 43°F | |
| JAN 27 | 45°F | 43°F | |
| JAN 28 | 45°F | 43°F | |
| JAN 29 | 45°F | 43°F |
* 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 | 41°F | 45°F | 50°F |
| February | 41°F | 47°F | 54°F |
| March | 41°F | 47°F | 54°F |
| April | 52°F | 58°F | 64°F |
| May | 59°F | 64°F | 68°F |
| June | 66°F | 72°F | 77°F |
| July | 70°F | 75°F | 81°F |
| August | 72°F | 77°F | 82°F |
| September | 72°F | 77°F | 82°F |
| October | 66°F | 72°F | 77°F |
| November | 52°F | 59°F | 66°F |
| December | 43°F | 47°F | 54°F |
Lake Cumberland: Water Temperature by Location
Lake Cumberland: Weather Forecast
January 22
January 23
January 24
January 25
January 26
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.