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 26.1°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 |
|---|---|---|---|
| SEP 14 | 26.4°C | 27.0°C | |
| SEP 15 | 25.8°C | 27.0°C | |
| SEP 16 | 25.8°C | 27.0°C | |
| SEP 17 | 26.2°C | 27.0°C | |
| SEP 18 | 26.2°C | 27.0°C | |
| SEP 19 | 26.1°C | 27.0°C | |
| SEP 20 | 26.0°C | 27.0°C | |
| SEP 21 | 26.1°C | 27.0°C | |
| SEP 22 | 27.0°C | 26.1°C | |
| SEP 23 | 27.0°C | 26.2°C | |
| SEP 24 | 27.0°C | 26.2°C | |
| SEP 25 | 27.0°C | 26.3°C | |
| SEP 26 | 27.0°C | 26.3°C | |
| SEP 27 | 27.0°C | 26.4°C | |
| SEP 28 | 27.0°C | 26.4°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
September 21
September 22
September 23
September 24
September 25
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.