East Branch Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in East Branch Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in East Branch Reservoir today is 21.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 | 19.3°C | 20.5°C | |
| JUN 7 | 19.8°C | 20.5°C | |
| JUN 8 | 20.4°C | 20.5°C | |
| JUN 10 | 20.4°C | 20.5°C | |
| JUN 11 | 21.3°C | 20.5°C | |
| JUN 12 | 21.4°C | 20.5°C | |
| JUN 13 | 21.5°C | 20.5°C | |
| JUN 14 | 20.5°C | 21.5°C | |
| JUN 15 | 20.5°C | 21.4°C | |
| JUN 16 | 20.5°C | 21.4°C | |
| JUN 17 | 20.5°C | 21.3°C | |
| JUN 18 | 20.5°C | 21.3°C | |
| JUN 19 | 20.5°C | 21.2°C | |
| JUN 20 | 20.5°C | 21.2°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 | 23°C | 25°C | 27°C |
| August | 21°C | 25°C | 29°C |
| September | 20°C | 23°C | 25°C |
| October | 13°C | 17°C | 21°C |
| November | 5°C | 10°C | 14°C |
| December | 3°C | 6°C | 8°C |
East Branch Reservoir: Water Temperature by Location
East Branch Reservoir: Weather Forecast
June 13
June 14
June 15
June 16
Location & Local Information
East Branch Reservoir in Ohio typically follows the seasonal pattern of midwestern impoundments, with water temperatures that can vary widely through the year. During winter the surface often approaches freezing, around 32–40°F (0–4°C), and portions may ice over; spring warming usually brings surface temperatures up into the 40–60°F range (4–15°C) as stratification begins. In summer the warmest surface temps commonly reach roughly 68–80°F (20–27°C), and shallow coves can spike toward the mid-80s°F (around 29°C) on hot days. In autumn the lake cools back into the 50s–60s°F (10–18°C) before late-fall mixing drives temperatures down again toward near-freezing.
Whether swimming is permitted depends on the reservoir’s management. Many reservoirs that serve as municipal water supplies or have sensitive infrastructure prohibit open swimming to protect water quality and reduce contamination risks; if East Branch functions in that role it is likely off-limits to swimmers for those reasons. Where swimming is allowed, it is typically restricted to designated beaches or areas and is most comfortable and safe when surface temperatures exceed about 70°F (21°C); cold water, even in spring or fall, poses hypothermia and safety hazards, and local rules and posted notices should always be observed.