Copan Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Copan Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Copan Lake today is 25.7°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 6 | 23.8°C | 23.0°C | |
| JUN 7 | 24.3°C | 23.0°C | |
| JUN 8 | 25.3°C | 23.0°C | |
| JUN 10 | 25.5°C | 23.0°C | |
| JUN 11 | 25.6°C | 23.0°C | |
| JUN 12 | 25.6°C | 23.0°C | |
| JUN 13 | 25.7°C | 23.0°C | |
| JUN 14 | 23.0°C | 25.6°C | |
| JUN 15 | 23.0°C | 25.4°C | |
| JUN 16 | 23.0°C | 25.3°C | |
| JUN 17 | 23.0°C | 25.2°C | |
| JUN 18 | 23.0°C | 25.0°C | |
| JUN 19 | 23.0°C | 24.9°C | |
| JUN 20 | 23.0°C | 24.8°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 | 5°C | 10°C |
| March | 2°C | 10°C | 18°C |
| April | 11°C | 16°C | 21°C |
| May | 16°C | 20°C | 25°C |
| June | 20°C | 23°C | 26°C |
| July | 25°C | 29°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 | 9°C | 14°C | 18°C |
| December | 3°C | 7°C | 11°C |
Copan Lake: Water Temperature by Location
Copan Lake: Weather Forecast
June 14
June 15
June 16
June 17
June 18
Location & Local Information
Copan Lake in northeastern Oklahoma experiences noticeable seasonal swings in water temperature typical of inland reservoirs. During winter the surface often cools to roughly 35–50°F (2–10°C). Spring sees a steady rise as waters warm into the 50–70°F range (10–21°C). Peak summer temperatures commonly reach about 75–90°F (24–32°C) in shallower, sun-exposed coves, while early fall typically brings cooling back into the 60–75°F band (15–24°C). Local conditions such as recent weather, depth, and inflow from tributaries can shift these numbers, with deeper basins staying cooler and shallow bays heating faster on hot, calm days.
Swimming at Copan Lake is generally permitted and the lake is used for recreational bathing by locals, but there are caveats. There are few if any supervised swim beaches and lifeguards are not provided, so swimming is at visitors’ own risk. Water levels, sudden drop-offs, submerged hazards, boat traffic and occasional water-quality advisories can affect safety and suitability for swimming, so it’s important to follow posted signs and any guidance from the managing agency or local authorities. Many people choose to swim in sheltered coves during warm months when surface temperatures are most comfortable.