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 25.5°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 23 | 24.9°C | 22.2°C | |
| JUN 24 | 25.3°C | 22.2°C | |
| JUN 25 | 25.3°C | 22.2°C | |
| JUN 26 | 25.3°C | 22.2°C | |
| JUN 27 | 25.5°C | 22.2°C | |
| JUN 28 | 25.6°C | 22.2°C | |
| JUN 29 | 25.6°C | 22.2°C | |
| JUN 30 | 25.6°C | 22.2°C | |
| JUL 1 | 28.0°C | 25.6°C | |
| JUL 2 | 28.0°C | 25.8°C | |
| JUL 3 | 28.0°C | 25.9°C | |
| JUL 4 | 28.0°C | 26.0°C | |
| JUL 5 | 28.0°C | 26.1°C | |
| JUL 6 | 28.0°C | 26.3°C | |
| JUL 7 | 28.0°C | 26.4°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 | 27°C | 30°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
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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.