Lake Granbury — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Granbury, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Granbury today is 27.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 2 | 26.0°C | 26.0°C | |
| JUN 3 | 23.0°C | 26.0°C | |
| JUN 4 | 23.6°C | 26.0°C | |
| JUN 5 | 27.1°C | 26.0°C | |
| JUN 6 | 27.1°C | 26.0°C | |
| JUN 7 | 27.0°C | 26.0°C | |
| JUN 8 | 27.4°C | 26.0°C | |
| JUN 10 | 26.0°C | 27.4°C | |
| JUN 11 | 26.0°C | 27.4°C | |
| JUN 12 | 26.0°C | 27.3°C | |
| JUN 13 | 26.0°C | 27.2°C | |
| JUN 14 | 26.0°C | 27.1°C | |
| JUN 15 | 26.0°C | 27.1°C | |
| JUN 16 | 26.0°C | 27.0°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 | 8°C | 11°C | 15°C |
| February | 6°C | 11°C | 16°C |
| March | 7°C | 14°C | 21°C |
| April | 16°C | 20°C | 25°C |
| May | 19°C | 24°C | 29°C |
| June | 23°C | 26°C | 29°C |
| July | 26°C | 30°C | 33°C |
| August | 26°C | 29°C | 31°C |
| September | 26°C | 28°C | 31°C |
| October | 21°C | 23°C | 26°C |
| November | 12°C | 17°C | 22°C |
| December | 8°C | 13°C | 18°C |
Lake Granbury: Water Temperature by Location
Lake Granbury: Weather Forecast
June 9
June 10
June 11
June 12
Location & Local Information
Lake Granbury is a reservoir on the Brazos River in North Texas and its surface water temperatures follow the region’s seasonal rhythm. In winter the lake often cools into the 40s–50s °F (about 4–13 °C), making the water brisk and uncomfortable for prolonged immersion. Spring brings a steady warming, with surface temperatures commonly rising into the mid-50s to mid-70s °F (13–24 °C). Peak summer conditions typically push the surface into the mid-70s to upper 80s °F, sometimes reaching 90 °F (24–32 °C and occasionally a bit higher), while autumn sees a gradual fall back into the 60s–70s °F (16–24 °C). These ranges can vary with air temperature, depth, wind and recent rainfall, so localized readings may differ from seasonally typical values.
Swimming in Lake Granbury is allowed and is a common recreational activity, but it is largely informal rather than universally regulated. Public parks and marinas provide access points where people swim, but there are also private shores and areas with boating traffic, submerged structures and variable water quality that can make some spots unsuitable. Authorities sometimes issue advisories for harmful algal blooms or contamination, and cold winter waters increase risk of hypothermia, so swimmers are advised to use lifeguarded or designated areas where available and to heed posted warnings and local guidance for safety.