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 19.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 | 18.3°C | 20.5°C | |
| JUN 4 | 18.3°C | 20.5°C | |
| JUN 5 | 19.2°C | 20.5°C | |
| JUN 6 | 19.6°C | 20.5°C | |
| JUN 7 | 19.5°C | 20.5°C | |
| JUN 8 | 19.4°C | 20.5°C | |
| JUN 10 | 19.9°C | 20.5°C | |
| JUN 11 | 20.5°C | 19.9°C | |
| JUN 12 | 20.5°C | 20.0°C | |
| JUN 13 | 20.5°C | 20.0°C | |
| JUN 14 | 20.5°C | 20.0°C | |
| JUN 15 | 20.5°C | 20.1°C | |
| JUN 16 | 20.5°C | 20.1°C | |
| JUN 17 | 20.5°C | 20.1°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
June 9
June 10
June 11
June 12
June 13
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.