Lake Hefner — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Hefner, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Hefner today is 25.3°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 |
|---|---|---|---|
| JUN 3 | 25.2°C | 24.4°C | |
| JUN 4 | 24.2°C | 24.4°C | |
| JUN 5 | 24.2°C | 24.4°C | |
| JUN 6 | 23.8°C | 24.4°C | |
| JUN 7 | 24.2°C | 24.4°C | |
| JUN 8 | 25.3°C | 24.4°C | |
| JUN 11 | 24.4°C | 25.3°C | |
| JUN 12 | 24.4°C | 25.2°C | |
| JUN 13 | 24.4°C | 25.2°C | |
| JUN 14 | 24.4°C | 25.1°C | |
| JUN 15 | 24.4°C | 25.1°C | |
| JUN 16 | 24.4°C | 25.0°C | |
| JUN 17 | 24.4°C | 25.0°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 | 0°C | 5°C | 11°C |
| February | 0°C | 5°C | 11°C |
| March | 3°C | 12°C | 21°C |
| April | 11°C | 16°C | 21°C |
| May | 16°C | 21°C | 26°C |
| June | 22°C | 24°C | 27°C |
| July | 25°C | 29°C | 32°C |
| August | 23°C | 26°C | 28°C |
| September | 21°C | 23°C | 26°C |
| October | 15°C | 20°C | 24°C |
| November | 8°C | 14°C | 19°C |
| December | 4°C | 8°C | 12°C |
Lake Hefner: Water Temperature by Location
Lake Hefner: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Lake Hefner’s water temperature varies widely through the year because of Oklahoma’s continental climate and the lake’s shallow areas that respond quickly to air temperature. In winter months surface temperatures often fall into the 40–50°F range (about 4–10°C). Spring brings a steady rise, commonly into the 50–65°F band (10–18°C) as afternoons warm. Peak summer surface temperatures in July and August are typically in the 70–85°F range (21–29°C), with the warmest days sometimes pushing slightly higher; early fall usually sees a gradual decline into the 60–75°F range (16–24°C). These numbers are approximate and can shift with cold snaps, heat waves, wind, and recent rainfall, and deeper or shaded parts of the reservoir remain cooler than shallow, sunlit areas.
Swimming at Lake Hefner is not actively promoted by city parks—there are no staffed public beaches or lifeguards, and portions of the shoreline are busy with boating and sailing activities. People do swim there at their own risk, but authorities and signage often discourage casual swimming due to safety factors such as boat traffic, submerged hazards, and occasional water-quality advisories (algae or bacterial blooms). If considering a swim, check local advisories, avoid high-traffic boating zones, and be prepared for variable temperatures outside the warmest summer weeks.