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 45°F.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 41°F (5°C) to 47°F (8°C). This water temperature is still quite low, and swimming in such conditions may only be comfortable for hardened individuals. It is recommended to limit the time spent in the water to avoid hypothermia. For those not accustomed to cold water, it is better to refrain from swimming. However, if you decide to enter the water, it is advisable to wear a warm wetsuit for protection against the cold. 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 |
|---|---|---|---|
| JAN 15 | 51°F | 47°F | |
| JAN 16 | 51°F | 47°F | |
| JAN 17 | 47°F | 47°F | |
| JAN 18 | 47°F | 47°F | |
| JAN 19 | 45°F | 47°F | |
| JAN 20 | 45°F | 47°F | |
| JAN 21 | 45°F | 47°F | |
| JAN 23 | 47°F | 45°F | |
| JAN 24 | 47°F | 45°F | |
| JAN 25 | 47°F | 45°F | |
| JAN 26 | 47°F | 45°F | |
| JAN 27 | 47°F | 45°F | |
| JAN 28 | 47°F | 45°F | |
| JAN 29 | 47°F | 45°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 | 41°F | 47°F | 54°F |
| February | 39°F | 46°F | 54°F |
| March | 41°F | 50°F | 59°F |
| April | 54°F | 60°F | 66°F |
| May | 64°F | 69°F | 73°F |
| June | 61°F | 72°F | 82°F |
| July | 73°F | 81°F | 88°F |
| August | 73°F | 82°F | 90°F |
| September | 72°F | 79°F | 86°F |
| October | 66°F | 75°F | 84°F |
| November | 52°F | 59°F | 66°F |
| December | 46°F | 52°F | 57°F |
Guntersville Lake: Water Temperature by Location
Guntersville Lake: Weather Forecast
January 22
January 23
January 24
January 25
January 26
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.