Norris Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Norris Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Norris Lake today is 71°F.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| MAY 11 | 64°F | 72°F | |
| MAY 12 | 68°F | 72°F | |
| MAY 13 | 65°F | 72°F | |
| MAY 14 | 65°F | 72°F | |
| MAY 15 | 65°F | 72°F | |
| MAY 16 | 65°F | 72°F | |
| MAY 17 | 65°F | 72°F | |
| MAY 18 | 70°F | 72°F | |
| MAY 19 | 72°F | 71°F | |
| MAY 20 | 72°F | 71°F | |
| MAY 21 | 72°F | 71°F | |
| MAY 22 | 72°F | 71°F | |
| MAY 23 | 72°F | 71°F | |
| MAY 24 | 72°F | 71°F | |
| MAY 25 | 72°F | 71°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 | 37°F | 45°F | 52°F |
| February | 37°F | 44°F | 50°F |
| March | 39°F | 49°F | 61°F |
| April | 52°F | 62°F | 72°F |
| May | 63°F | 72°F | 81°F |
| June | 72°F | 79°F | 86°F |
| July | 70°F | 74°F | 79°F |
| August | 72°F | 79°F | 86°F |
| September | 70°F | 81°F | 91°F |
| October | 64°F | 70°F | 75°F |
| November | 52°F | 58°F | 64°F |
| December | 43°F | 49°F | 55°F |
Norris Lake: Water Temperature by Location
Norris Lake: Weather Forecast
May 19
May 20
May 21
May 22
Location & Local Information
Norris Lake, a TVA reservoir in northeastern Tennessee, experiences substantial seasonal variation in surface water temperature. In summer months the surface commonly warms to the mid-70s to mid-80s °F (about 24–29 °C), and during hot spells can approach the upper-80s °F (30–31 °C). Spring brings a steady warm-up from the 40s–60s °F (4–16 °C) as snowmelt and runoff cool the basin, while fall sees a decline from the 60s into the 40s–50s °F (16–4–10 °C). Winters are typically cold enough that surface readings often sit near the mid-30s to low-40s °F (1–6 °C). Like many reservoirs, Norris stratifies in summer: surface layers are warmer while deeper water remains much cooler, often in the 50s–60s °F (10–16 °C), which can be a shock to swimmers who dive or swim vertically.
Swimming at Norris Lake is allowed in many locations but is subject to local rules, private property rights, and safety considerations. There are no widespread lifeguarded beaches maintained across the entire lake, and areas near marinas, boat ramps, or dam infrastructure may be posted against swimming for safety. The seasonal temperature swings make summer the most comfortable time for casual swimming, whereas spring and late fall pose risks of cold-water shock and hypothermia. Visitors should heed posted signs, respect private docks, be mindful of boat traffic, and choose sheltered areas with awareness of changing temperatures.