Guntersville Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Guntersville Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Guntersville Lake today is 20.8°C.
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 |
|---|---|---|---|
| OCT 5 | 22.4°C | 24.0°C | |
| OCT 6 | 22.6°C | 24.0°C | |
| OCT 7 | 22.0°C | 24.0°C | |
| OCT 8 | 21.9°C | 24.0°C | |
| OCT 9 | 21.8°C | 24.0°C | |
| OCT 10 | 21.6°C | 24.0°C | |
| OCT 11 | 21.9°C | 24.0°C | |
| OCT 12 | 21.8°C | 24.0°C | |
| OCT 13 | 24.0°C | 21.0°C | |
| OCT 14 | 24.0°C | 21.1°C | |
| OCT 15 | 24.0°C | 21.3°C | |
| OCT 16 | 24.0°C | 21.4°C | |
| OCT 17 | 24.0°C | 21.6°C | |
| OCT 18 | 24.0°C | 21.8°C | |
| OCT 19 | 24.0°C | 21.9°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 | 5°C | 8°C | 12°C |
| February | 4°C | 8°C | 13°C |
| March | 5°C | 11°C | 18°C |
| April | 12°C | 17°C | 23°C |
| May | 18°C | 22°C | 26°C |
| June | 16°C | 22°C | 28°C |
| July | 23°C | 27°C | 31°C |
| August | 23°C | 28°C | 32°C |
| September | 22°C | 26°C | 30°C |
| October | 19°C | 24°C | 29°C |
| November | 11°C | 15°C | 19°C |
| December | 8°C | 11°C | 14°C |
Guntersville Lake: Water Temperature by Location
Guntersville Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Guntersville Lake, the largest lake in Alabama, stretches along the Tennessee River in the northern part of the state and is known for its broad open waters and scenic mountain surroundings. Its water temperature reflects the region’s warm, humid climate and the depth of the reservoir. During winter, surface temperatures typically range from about 45 to 52°F (7–11°C), cool enough to limit swimming but still suitable for fishing and boating. In spring, the lake warms steadily, reaching roughly 60–70°F (16–21°C) by late April and May. Summer brings consistently warm conditions, with surface temperatures commonly between 80 and 86°F (27–30°C) in July and August. By autumn, cooling begins gradually, and water temperatures usually fall to around 65–72°F (18–22°C) by October before declining further into winter.
Swimming is allowed at Guntersville Lake and is especially popular during the long, warm summer season. The lake offers multiple public access areas, parks, and sandy swimming spots where visitors can safely enjoy the water. Calm lake arms and coves provide protected areas ideal for family swimming, while boaters and paddlers share the more open sections. Because Guntersville Lake is a busy recreational reservoir, swimmers are encouraged to use designated swim zones and remain aware of boat traffic. Overall, its warm temperatures and diverse shoreline make it one of Alabama’s favorite destinations for summertime water recreation.