Nantahala Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Nantahala Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Nantahala Lake today is 19.9°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 5 | 21.3°C | 21.0°C | |
| OCT 6 | 21.1°C | 21.0°C | |
| OCT 7 | 21.3°C | 21.0°C | |
| OCT 8 | 21.2°C | 21.0°C | |
| OCT 9 | 20.7°C | 21.0°C | |
| OCT 10 | 20.5°C | 21.0°C | |
| OCT 11 | 21.1°C | 21.0°C | |
| OCT 12 | 20.1°C | 21.0°C | |
| OCT 13 | 21.0°C | 20.0°C | |
| OCT 14 | 21.0°C | 20.0°C | |
| OCT 15 | 21.0°C | 20.1°C | |
| OCT 16 | 21.0°C | 20.1°C | |
| OCT 17 | 21.0°C | 20.2°C | |
| OCT 18 | 21.0°C | 20.2°C | |
| OCT 19 | 21.0°C | 20.3°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 | 11°C |
| February | 2°C | 6°C | 10°C |
| March | 5°C | 8°C | 12°C |
| April | 11°C | 16°C | 20°C |
| May | 15°C | 19°C | 23°C |
| June | 18°C | 22°C | 26°C |
| July | 21°C | 26°C | 29°C |
| August | 21°C | 24°C | 27°C |
| September | 21°C | 25°C | 28°C |
| October | 17°C | 21°C | 25°C |
| November | 10°C | 16°C | 20°C |
| December | 4°C | 9°C | 12°C |
Nantahala Lake: Water Temperature by Location
Nantahala Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Nantahala Lake, a high-elevation reservoir in western North Carolina, tends to run cooler than lower-elevation lakes because of its altitude, depth, and mountain-fed inflows. Seasonal surface temperatures in summer typically range from about 68–78°F (20–26°C), and on hot, calm days can climb into the low 80s°F (around 27–28°C). In spring the water is brisk, often 45–60°F (7–16°C) as snowmelt and runoff dominate. Fall cooling brings surface temperatures down to roughly 50–65°F (10–18°C), while winter conditions can see the lake near freezing or in the mid-30s to mid-40s°F (1–7°C). Deeper water remains substantially colder year‑round, and abrupt thermoclines are common in a reservoir of this kind.
Swimming is generally possible in parts of Nantahala Lake, but it is typically unguarded and subject to local access rules and private property boundaries, so visitors should follow posted signage and marina guidance. Because of the lake’s cool temperatures outside the warmest weeks, the depth and cold shock risk, and occasional water-level fluctuations from dam operations, recreational swimmers are advised to exercise caution, wear flotation if uncertain, and avoid prolonged immersion during spring and early summer when temperatures remain low.