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 25.6°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 |
|---|---|---|---|
| SEP 16 | 26.5°C | 25.3°C | |
| SEP 17 | 26.0°C | 25.3°C | |
| SEP 18 | 26.5°C | 25.3°C | |
| SEP 19 | 26.2°C | 25.3°C | |
| SEP 20 | 25.9°C | 25.3°C | |
| SEP 21 | 25.6°C | 25.3°C | |
| SEP 22 | 25.5°C | 25.3°C | |
| SEP 23 | 25.6°C | 25.3°C | |
| SEP 24 | 25.3°C | 25.6°C | |
| SEP 25 | 25.3°C | 25.6°C | |
| SEP 26 | 25.3°C | 25.6°C | |
| SEP 27 | 25.3°C | 25.5°C | |
| SEP 28 | 25.3°C | 25.5°C | |
| SEP 29 | 25.3°C | 25.5°C | |
| SEP 30 | 25.3°C | 25.5°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
September 23
September 24
September 25
September 26
September 27
September 28
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.