Lake J B Thomas — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake J B Thomas, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake J B Thomas today is 16.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 26 | 19.2°C | 20.5°C | |
| OCT 27 | 18.9°C | 20.5°C | |
| OCT 28 | 19.6°C | 20.5°C | |
| OCT 29 | 19.1°C | 20.5°C | |
| OCT 30 | 18.8°C | 20.5°C | |
| OCT 31 | 18.8°C | 20.5°C | |
| NOV 1 | 17.7°C | 15.0°C | |
| NOV 2 | 16.5°C | 15.0°C | |
| NOV 3 | 15.0°C | 16.4°C | |
| NOV 4 | 15.0°C | 16.4°C | |
| NOV 5 | 15.0°C | 16.3°C | |
| NOV 6 | 15.0°C | 16.2°C | |
| NOV 7 | 15.0°C | 16.1°C | |
| NOV 8 | 15.0°C | 16.1°C | |
| NOV 9 | 15.0°C | 16.0°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 | 1°C | 7°C | 14°C |
| February | 1°C | 8°C | 15°C |
| March | 1°C | 12°C | 23°C |
| April | 9°C | 17°C | 25°C |
| May | 14°C | 22°C | 30°C |
| June | 18°C | 23°C | 29°C |
| July | 21°C | 27°C | 34°C |
| August | 22°C | 28°C | 34°C |
| September | 19°C | 25°C | 32°C |
| October | 15°C | 21°C | 26°C |
| November | 8°C | 15°C | 22°C |
| December | 9°C | 13°C | 17°C |
Lake J B Thomas: Water Temperature by Location
Lake J B Thomas: Weather Forecast
November 3
November 4
November 5
November 6
November 7
Location & Local Information
Lake J B Thomas, a reservoir near Big Spring in West Texas, experiences wide seasonal swings in surface water temperature. In winter the lake commonly ranges from about 40–55°F (4–13°C), spring brings warming to roughly 55–70°F (13–21°C), summer surface temperatures often reach 75–90°F (24–32°C) or higher in shallow bays, and autumn typically cools back through the 60–75°F (16–24°C) range. Local conditions such as recent air temperatures, wind, depth and inflows can push these numbers up or down; deeper water remains cooler than the surface, while shallow coves heat more quickly.
Swimming and general water recreation are commonly practiced at Lake J B Thomas, but there are no extensive public beaches or lifeguarded areas, so visitors should take precautions. Access points and boat ramps provide places to enter the water, yet water quality, occasional algal growth, submerged hazards and changing depths mean swimmers should heed posted advisories and exercise caution. In short, swimming is allowed in many parts of the lake, but suitability depends on season, temperature, and current local safety and water‑quality conditions, so checking with local authorities before swimming is recommended.