Cypress Bayou Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Cypress Bayou Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Cypress Bayou Reservoir today is 18.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 | 21.8°C | 25.0°C | |
| OCT 27 | 21.3°C | 25.0°C | |
| OCT 28 | 20.9°C | 25.0°C | |
| OCT 29 | 20.1°C | 25.0°C | |
| OCT 30 | 20.0°C | 25.0°C | |
| OCT 31 | 20.3°C | 25.0°C | |
| NOV 1 | 20.0°C | 19.0°C | |
| NOV 2 | 18.9°C | 19.0°C | |
| NOV 3 | 19.0°C | 18.8°C | |
| NOV 4 | 19.0°C | 18.8°C | |
| NOV 5 | 19.0°C | 18.8°C | |
| NOV 6 | 19.0°C | 18.8°C | |
| NOV 7 | 19.0°C | 18.9°C | |
| NOV 8 | 19.0°C | 18.9°C | |
| NOV 9 | 19.0°C | 18.9°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 | 6°C | 10°C | 15°C |
| February | 7°C | 10°C | 14°C |
| March | 9°C | 14°C | 20°C |
| April | 13°C | 17°C | 22°C |
| May | 20°C | 24°C | 28°C |
| June | 23°C | 26°C | 29°C |
| July | 24°C | 29°C | 34°C |
| August | 25°C | 29°C | 33°C |
| September | 26°C | 29°C | 31°C |
| October | 22°C | 25°C | 28°C |
| November | 14°C | 19°C | 24°C |
| December | 9°C | 12°C | 15°C |
Cypress Bayou Reservoir: Water Temperature by Location
Cypress Bayou Reservoir: Weather Forecast
November 3
November 4
November 5
November 6
November 7
Location & Local Information
The lake portion of the Cypress Bayou Reservoir in Louisiana typically experiences a wide seasonal swing in surface water temperature. In winter months surface readings often fall into the mid-40s to low 60s °F (about 7–16 °C), depending on cold snaps and local shading from cypress stands. Spring and fall usually see milder water, commonly in the 60s to mid-70s °F (roughly 16–24 °C). Peak summer surface temperatures can reach the mid-70s to upper 80s °F (about 24–31 °C) on warm, sunny days. These figures vary with recent weather, depth, flow, and the amount of aquatic vegetation; deeper or heavily shaded areas remain cooler than shallow, open sections.
Swimming opportunities at Cypress Bayou Reservoir depend on local management and posted rules. In many Louisiana reservoirs public swimming is permitted in designated areas, especially when water quality is monitored and safety measures are provided, but some reservoirs restrict swimming if they serve as municipal water supplies or if hazards such as submerged timber, variable depths, boat traffic, or occasional algal blooms are present. Because summer temperatures are the most comfortable for recreational swimming, most casual swimmers choose late spring through early fall, while cooler winter water makes immersion uncomfortable for many. Visitors should observe signage and follow local authority guidance for allowed activities and safety precautions.