Pymatuning Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Pymatuning Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Pymatuning Reservoir today is 9.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 47°F (8°C) to 50°F (10°C). This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing can be used. 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 | 13.9°C | 16.0°C | |
| OCT 27 | 12.8°C | 16.0°C | |
| OCT 28 | 13.8°C | 16.0°C | |
| OCT 29 | 12.7°C | 16.0°C | |
| OCT 30 | 12.3°C | 16.0°C | |
| OCT 31 | 12.5°C | 16.0°C | |
| NOV 1 | 14.3°C | 10.0°C | |
| NOV 2 | 9.5°C | 10.0°C | |
| NOV 3 | 10.0°C | 9.5°C | |
| NOV 4 | 10.0°C | 9.6°C | |
| NOV 5 | 10.0°C | 9.6°C | |
| NOV 6 | 10.0°C | 9.6°C | |
| NOV 7 | 10.0°C | 9.6°C | |
| NOV 8 | 10.0°C | 9.7°C | |
| NOV 9 | 10.0°C | 9.7°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 | 0°C | 3°C | 6°C |
| February | 0°C | 4°C | 7°C |
| March | 1°C | 5°C | 9°C |
| April | 6°C | 11°C | 16°C |
| May | 11°C | 17°C | 22°C |
| June | 17°C | 21°C | 24°C |
| July | 21°C | 24°C | 27°C |
| August | 20°C | 25°C | 29°C |
| September | 18°C | 22°C | 25°C |
| October | 13°C | 16°C | 19°C |
| November | 5°C | 10°C | 14°C |
| December | 2°C | 5°C | 8°C |
Pymatuning Reservoir: Water Temperature by Location
Pymatuning Reservoir: Weather Forecast
November 3
November 4
November 5
November 6
November 7
Location & Local Information
The lake portion of Pymatuning Reservoir in Ohio is a relatively shallow, large body of water, which influences how quickly it warms and cools through the year. In winter the surface often hovers around freezing and can ice over, typically in the low 30s to upper 30s °F (0 to 4 °C). Spring brings a gradual rise, with surface temperatures commonly in the 40s to low 60s °F (4 to 16 °C) as the water mixes and warms. By summer the lake is at its warmest, frequently reaching the low 70s to upper 70s °F (21 to 26 °C) during July and August, though localized conditions can push parts slightly warmer or cooler. In fall temperatures decline back through the 50s and 60s °F (10 to 18 °C) before refreezing.
Swimming is permitted in designated beach and day-use areas of Pymatuning during the warmer months, primarily because park staff monitor those sites for safety, lifeguard coverage at times, and water quality. Access is limited or discouraged when the surface is too cold for safe swimming, when ice is present, or when health advisories or hazardous conditions such as harmful algal blooms or dangerous currents are posted. Visitors should use marked swim areas, heed posted rules, and check current beach status before entering the water.