Rayburn Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Rayburn Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Rayburn Lake today is 78°F.
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 |
|---|---|---|---|
| MAY 6 | 70°F | 76°F | |
| MAY 7 | 75°F | 76°F | |
| MAY 8 | 75°F | 76°F | |
| MAY 9 | 76°F | 76°F | |
| MAY 10 | 77°F | 76°F | |
| MAY 11 | 77°F | 76°F | |
| MAY 12 | 77°F | 76°F | |
| MAY 13 | 77°F | 76°F | |
| MAY 14 | 76°F | 77°F | |
| MAY 15 | 76°F | 77°F | |
| MAY 16 | 76°F | 77°F | |
| MAY 17 | 76°F | 77°F | |
| MAY 18 | 76°F | 77°F | |
| MAY 19 | 76°F | 77°F | |
| MAY 20 | 76°F | 77°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 | 45°F | 56°F | 68°F |
| February | 46°F | 56°F | 68°F |
| March | 55°F | 65°F | 75°F |
| April | 61°F | 72°F | 82°F |
| May | 68°F | 76°F | 84°F |
| June | 75°F | 80°F | 84°F |
| July | 79°F | 86°F | 93°F |
| August | 77°F | 83°F | 90°F |
| September | 79°F | 83°F | 88°F |
| October | 73°F | 81°F | 88°F |
| November | 61°F | 67°F | 73°F |
| December | 50°F | 60°F | 72°F |
Rayburn Lake: Water Temperature by Location
Rayburn Lake: Weather Forecast
May 14
May 15
May 16
May 17
May 18
Location & Local Information
Sam Rayburn Reservoir in southeast Texas experiences noticeable seasonal swings in surface water temperature. In winter months the lake commonly ranges from about 45–55°F (7–13°C) at the surface, while spring sees a rise to roughly 55–70°F (13–21°C) as air temperatures warm. Summer surface temperatures frequently reach 75–90°F (24–32°C), and in late summer some shallow coves can warm slightly higher on hot, calm days. Fall temperatures typically fall back into a 60–75°F (16–24°C) band. These are general surface ranges; deeper water stays cooler and conditions vary day to day with weather, wind and reservoir levels.
Swimming is allowed in and around Sam Rayburn, and many visitors swim from shore, docks or boats, but there are few lifeguarded beaches and no broad prohibition. Recreational use is common, yet swimmers should be cautious because of boat traffic, sudden drop-offs, submerged hazards and variable currents near inlets. Water quality advisories or algal blooms can occur occasionally, so checking local park notices is wise. For safety and comfort, choose sheltered coves, wear a life jacket when boating, avoid swimming alone, and be mindful that colder seasons produce brisk water that can cause rapid heat loss and increased risk of cold-water shock.