Nickajack Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Nickajack Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Nickajack Lake today is 28.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. 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 | 28.7°C | 25.6°C | |
| AUG 5 | 28.7°C | 25.6°C | |
| AUG 6 | 28.7°C | 25.6°C | |
| AUG 7 | 28.5°C | 25.6°C | |
| AUG 8 | 28.7°C | 25.6°C | |
| AUG 9 | 28.7°C | 25.6°C | |
| AUG 10 | 28.6°C | 25.6°C | |
| AUG 11 | 28.6°C | 25.6°C | |
| AUG 12 | 25.6°C | 28.5°C | |
| AUG 13 | 25.6°C | 28.3°C | |
| AUG 14 | 25.6°C | 28.2°C | |
| AUG 15 | 25.6°C | 28.0°C | |
| AUG 16 | 25.6°C | 27.9°C | |
| AUG 17 | 25.6°C | 27.7°C | |
| AUG 18 | 25.6°C | 27.6°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 | 11°C |
| February | 3°C | 7°C | 12°C |
| March | 5°C | 11°C | 18°C |
| April | 13°C | 18°C | 23°C |
| May | 18°C | 23°C | 28°C |
| June | 21°C | 26°C | 30°C |
| July | 23°C | 29°C | 35°C |
| August | 22°C | 26°C | 30°C |
| September | 22°C | 27°C | 32°C |
| October | 16°C | 19°C | 22°C |
| November | 11°C | 15°C | 19°C |
| December | 8°C | 11°C | 14°C |
Nickajack Lake: Water Temperature by Location
Nickajack Lake: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
Nickajack Lake, a TVA reservoir on the Tennessee River, experiences a broad seasonal cycle in surface water temperature. In winter the lake commonly cools to roughly 40–55°F (4–13°C). Spring brings warming conditions around 50–70°F (10–21°C) as air temperatures rise and stratification breaks down. Peak surface temperatures in summer often reach about 75–85°F (24–29°C), while autumn sees a gradual cooling with typical ranges near 60–75°F (15–24°C). Deeper water remains noticeably colder year-round and flows from the dam can produce locally cooler pockets; temperature can also change quickly near inflows, outflows and in shaded coves.
Swimming is generally permitted in many parts of Nickajack Lake because it is managed for public recreation, but there are no universally designated lifeguarded beaches across the reservoir and local rules or posted signs may restrict access in specific spots. Safety considerations explain those restrictions: strong currents and sudden changes in depth near the dam and navigation channels, boat traffic, submerged structures, and colder deep water all increase risk. As a result, people commonly swim from shorelines and recreation areas where allowed, but they are expected to follow local regulations, heed warning signs, and take appropriate safety precautions.