J Percy Priest Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in J Percy Priest Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in J Percy Priest Reservoir today is 18.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| OCT 26 | 19.4°C | 20.5°C | |
| OCT 27 | 19.2°C | 20.5°C | |
| OCT 28 | 19.8°C | 20.5°C | |
| OCT 29 | 19.5°C | 20.5°C | |
| OCT 30 | 19.2°C | 20.5°C | |
| OCT 31 | 19.0°C | 20.5°C | |
| NOV 1 | 18.9°C | 13.5°C | |
| NOV 2 | 18.5°C | 13.5°C | |
| NOV 3 | 13.5°C | 17.9°C | |
| NOV 4 | 13.5°C | 17.6°C | |
| NOV 5 | 13.5°C | 17.4°C | |
| NOV 6 | 13.5°C | 17.2°C | |
| NOV 7 | 13.5°C | 17.0°C | |
| NOV 8 | 13.5°C | 16.7°C | |
| NOV 9 | 13.5°C | 16.5°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 | 2°C | 7°C | 12°C |
| February | 4°C | 8°C | 12°C |
| March | 10°C | 14°C | 18°C |
| April | 12°C | 17°C | 23°C |
| May | 16°C | 22°C | 26°C |
| June | 20°C | 24°C | 28°C |
| July | 23°C | 28°C | 32°C |
| August | 22°C | 27°C | 32°C |
| September | 22°C | 27°C | 32°C |
| October | 17°C | 21°C | 24°C |
| November | 9°C | 14°C | 17°C |
| December | 6°C | 9°C | 13°C |
J Percy Priest Reservoir: Water Temperature by Location
J Percy Priest Reservoir: Weather Forecast
November 3
November 4
November 5
November 6
November 7
November 8
Location & Local Information
J. Percy Priest Reservoir, often called Percy Priest Lake near Nashville, experiences notable seasonal shifts in surface water temperature. In winter the lake typically cools to roughly 35–50°F (2–10°C), rising through spring to about 50–70°F (10–21°C) as air temperatures warm. By summer the surface commonly reaches 75–85°F (24–29°C) and can climb into the upper 80s or around 90°F (30–32°C) during heat spells. In fall the water gradually falls back into the 55–70°F (13–21°C) range. These values represent general surface conditions; deeper or shaded areas remain cooler and short-term weather can change temperatures rapidly.
Swimming is permitted in many parts of the reservoir, particularly at shoreline parks and designated launch or recreation areas, but it is subject to safety and water-quality considerations. There are often no lifeguards on duty, boat traffic and drop-offs create hazards, and occasional algal blooms or elevated bacteria levels can prompt advisories against swimming. For safe recreation, swimmers should use marked or established areas, be aware of changing temperatures that affect hypothermia risk, and heed local health or Corps of Engineers notices regarding water quality and permitted activities.