Keystone Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Keystone Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Keystone Lake today is 31.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. 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 |
|---|---|---|---|
| AUG 4 | 30.7°C | 28.6°C | |
| AUG 5 | 30.7°C | 28.6°C | |
| AUG 6 | 30.7°C | 28.6°C | |
| AUG 7 | 30.8°C | 28.6°C | |
| AUG 8 | 30.8°C | 28.6°C | |
| AUG 9 | 30.9°C | 28.6°C | |
| AUG 10 | 31.2°C | 28.6°C | |
| AUG 11 | 32.1°C | 28.6°C | |
| AUG 12 | 28.6°C | 31.7°C | |
| AUG 13 | 28.6°C | 31.6°C | |
| AUG 14 | 28.6°C | 31.4°C | |
| AUG 15 | 28.6°C | 31.2°C | |
| AUG 16 | 28.6°C | 31.1°C | |
| AUG 17 | 28.6°C | 30.9°C | |
| AUG 18 | 28.6°C | 30.7°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 | 2°C | 6°C | 11°C |
| February | 1°C | 7°C | 13°C |
| March | 2°C | 11°C | 21°C |
| April | 11°C | 16°C | 22°C |
| May | 16°C | 21°C | 27°C |
| June | 18°C | 22°C | 27°C |
| July | 24°C | 28°C | 32°C |
| August | 25°C | 29°C | 33°C |
| September | 21°C | 25°C | 29°C |
| October | 16°C | 20°C | 23°C |
| November | 10°C | 15°C | 19°C |
| December | 3°C | 8°C | 13°C |
Keystone Lake: Water Temperature by Location
Keystone Lake: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
Keystone Lake in northeastern Oklahoma experiences marked seasonal shifts in water temperature. In winter the surface often falls to roughly 35–50°F (2–10°C). Spring sees a steady rise, with typical readings in the 50–70°F range (10–21°C) as warming progresses. Peak summer temperatures commonly reach about 75–85°F (24–29°C), and during heat waves surface water can climb a few degrees higher. In autumn the lake cools back to roughly 60–75°F (16–24°C) before winter chill sets in. These values are approximate and vary with weather, depth, inflow, and time of day; deeper or shaded areas remain cooler than shallow bays.
Swimming is generally allowed at Keystone Lake’s public recreation areas and designated beaches because the reservoir is managed for multiple recreational uses, including bathing, boating and fishing. However, there are no universally staffed lifeguards across the lake, so swimmers should heed posted signs, obey park rules, and be aware of hazards such as boat traffic, submerged debris and changing water levels. Occasional advisories or temporary closures can occur for water quality issues like algal blooms or bacterial contamination, so checking local park notices before entering the water is recommended for safety.