Middle Harbor Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Middle Harbor Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Middle Harbor Lake today is 24.7°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 |
|---|---|---|---|
| AUG 25 | 24.0°C | 25.0°C | |
| AUG 26 | 24.0°C | 25.0°C | |
| AUG 27 | 23.3°C | 25.0°C | |
| AUG 28 | 24.2°C | 25.0°C | |
| AUG 29 | 24.3°C | 25.0°C | |
| AUG 30 | 24.2°C | 25.0°C | |
| AUG 31 | 24.3°C | 25.0°C | |
| SEP 1 | 24.7°C | 23.5°C | |
| SEP 2 | 23.5°C | 24.6°C | |
| SEP 3 | 23.5°C | 24.6°C | |
| SEP 4 | 23.5°C | 24.5°C | |
| SEP 5 | 23.5°C | 24.5°C | |
| SEP 6 | 23.5°C | 24.4°C | |
| SEP 7 | 23.5°C | 24.3°C | |
| SEP 8 | 23.5°C | 24.3°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 | 1°C | 4°C |
| February | 0°C | 2°C | 5°C |
| March | 1°C | 6°C | 11°C |
| April | 5°C | 10°C | 16°C |
| May | 11°C | 15°C | 20°C |
| June | 17°C | 21°C | 25°C |
| July | 23°C | 26°C | 30°C |
| August | 22°C | 25°C | 28°C |
| September | 20°C | 24°C | 27°C |
| October | 14°C | 18°C | 21°C |
| November | 6°C | 10°C | 14°C |
| December | 0°C | 3°C | 7°C |
Middle Harbor Lake: Water Temperature by Location
Middle Harbor Lake: Weather Forecast
September 2
September 3
September 4
September 5
September 6
Location & Local Information
Middle Harbor in Ohio experiences the same seasonal swings in water temperature common to inland lakes in the region. Surface temperatures typically rise from the 40s–60s °F (4–16 °C) in spring as ice melts and air warms, reach their warmest in summer often between about 68–78 °F (20–26 °C) depending on depth and sun exposure, then cool through the fall into the 50s–60s °F (10–16 °C) before winter brings surface readings near freezing, roughly 32–40 °F (0–4 °C) where ice or very cold water can occur. These are averages; actual temperatures at Middle Harbor will fluctuate with recent weather, water depth, inflow, and wind-driven mixing, with shallower areas warming faster than deeper sections.
Swimming at Middle Harbor is typically concentrated in the late spring through early fall when surface temperatures are most comfortable; many people find water above about 70 °F (21 °C) preferable for extended swims. Whether swimming is officially allowed depends on local rules and conditions: some shorelines are open to public swimming, while others may be restricted for safety, private ownership, boat traffic, poor water quality, or harmful algal bloom advisories. Cold water below the comfortable range also increases risk of cold shock and hypothermia, so posted signs, local advisories, and current water-quality reports should guide decisions about swimming.