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 23.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 |
|---|---|---|---|
| JUN 5 | 22.4°C | 22.0°C | |
| JUN 6 | 22.4°C | 22.0°C | |
| JUN 7 | 22.6°C | 22.0°C | |
| JUN 8 | 22.6°C | 22.0°C | |
| JUN 10 | 22.8°C | 22.0°C | |
| JUN 11 | 23.3°C | 22.0°C | |
| JUN 12 | 23.4°C | 22.0°C | |
| JUN 13 | 22.0°C | 23.4°C | |
| JUN 14 | 22.0°C | 23.4°C | |
| JUN 15 | 22.0°C | 23.3°C | |
| JUN 16 | 22.0°C | 23.2°C | |
| JUN 17 | 22.0°C | 23.1°C | |
| JUN 18 | 22.0°C | 23.1°C | |
| JUN 19 | 22.0°C | 23.0°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
June 13
June 14
June 15
June 16
June 17
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.