Ohio Water Temperatures
Current lake & river temperatures in Ohio — updated daily from USGS sensors.
Ohio — Ranked by Temperature
62 with data| # | Water Body | °F | °C | Condition | 🏊 | Date |
|---|---|---|---|---|---|---|
| 1 | Ohio River At Ironton, Oh River | 81.3° | 27.4° | ☀️ Warm | 🏊 Excellent | Jul 27 |
| 2 | Maumee River At Waterville Oh River | 80.2° | 26.8° | ☀️ Warm | 🏊 Excellent | Jul 27 |
| 3 | Maumee River Near Defiance Oh River | 79.9° | 26.6° | ☀️ Warm | ✅ Good | Jul 27 |
| 4 | Hoover Reservoir At Central College Oh Reservoir | 79.5° | 26.4° | ☀️ Warm | ✅ Good | Jul 27 |
| 5 | Alum Creek At Africa Oh River | 78.8° | 26° | ☀️ Warm | ✅ Good | Jul 27 |
| 6 | Maumee River At Antwerp Oh River | 78.8° | 26° | ☀️ Warm | ✅ Good | Jul 27 |
| 7 | Great Miami River At Middletown Oh River | 78.1° | 25.6° | ☀️ Warm | ✅ Good | Sep 7 |
| 8 | Grand River Near Painesville Oh River | 77.5° | 25.3° | ☀️ Warm | ✅ Good | Jul 27 |
| 9 | Paint Creek Near Bainbridge Oh River | 76.6° | 24.8° | ☀️ Warm | ✅ Good | Jul 27 |
| 10 | Scioto River Above Shadeville Oh River | 76.6° | 24.8° | ☀️ Warm | ✅ Good | Jul 27 |
| 11 | Sandusky River Near Fremont Oh River | 75.9° | 24.4° | ☀️ Warm | ✅ Good | Jul 27 |
| 12 | Mosquito Creek Bl Mosquito Ck Dam Nr Cortland Oh River | 75.7° | 24.3° | ☀️ Warm | ✅ Good | Jul 27 |
| 13 | Huron River At Milan Oh River | 75.6° | 24.2° | ☀️ Warm | ✅ Good | Jul 27 |
| 14 | Scioto R. At O'Shaughnessy Dam Near Dublin Oh Reservoir | 75.6° | 24.2° | ☀️ Warm | ✅ Good | Jul 27 |
| 15 | Rocky River Near Berea Oh River | 74.7° | 23.7° | 🌤️ Comfortable | ✅ Good | Jul 27 |
| 16 | Mahoning River At Pricetown Oh River | 74.7° | 23.7° | 🌤️ Comfortable | ✅ Good | Jul 27 |
| 17 | Big Darby Creek Above Georgesville Oh River | 74.1° | 23.4° | 🌤️ Comfortable | ✅ Good | Jul 27 |
| 18 | Mcguire Creek Above Leesville Lake Oh River | 73.6° | 23.1° | 🌤️ Comfortable | ✅ Good | Jul 27 |
| 19 | Scioto River Near Prospect Oh River | 73° | 22.8° | 🌤️ Comfortable | ✅ Good | Jul 27 |
| 20 | Mahoning River Near U.S. Route 422 At Warren Oh River | 72.9° | 22.7° | 🌤️ Comfortable | ✅ Good | Jul 27 |
| 21 | Indian Fork At Dellroy Oh Lake | 72.7° | 22.6° | 🌤️ Comfortable | ✅ Good | Jul 27 |
| 22 | Clover Groff Ditch Below Alton Oh Lake | 72.7° | 22.6° | 🌤️ Comfortable | ✅ Good | Jul 27 |
| 23 | Mahoning River At Lowellville Oh River | 72.7° | 22.6° | 🌤️ Comfortable | ✅ Good | Jul 27 |
| 24 | Deer Creek Near Pancoastburg Oh River | 72.5° | 22.5° | 🌤️ Comfortable | ✅ Good | Jul 27 |
| 25 | Cuyahoga River At Jaite Oh River | 72.5° | 22.5° | 🌤️ Comfortable | ✅ Good | Jul 27 |
More Ohio Resources
❓ Ohio Water Temperature FAQ
What is the warmest lake in Ohio today?
Based on our latest USGS data, Ohio River At Ironton, Oh is currently the warmest water body in Ohio at 81.3°F.
Which Ohio lakes are good for swimming right now?
Lakes with water temperatures above 72°F are generally comfortable for swimming. Currently, Ohio's average water temperature is 68.8°F — check individual lakes above for specific conditions.
What is the best water temperature for fishing in Ohio?
The optimal temperature range depends on your target species. For bass fishing, look for water bodies between 65–75°F. For trout, target the coldest water bodies in Ohio — typically 50–65°F. Use the table above to identify which lakes are in the ideal range for your target species.
🔬 Data Methodology & Sources
Water temperature readings on this site are collected from USGS (United States Geological Survey) monitoring stations installed at lakes, rivers, and reservoirs across the country. Sensors measure water surface temperature in Celsius, which is converted to Fahrenheit for display. Data is retrieved and stored daily. Temperatures shown reflect the most recent available sensor reading for each water body, typically from the past 1–30 days depending on station reporting frequency.
⚠️ Water temperatures can vary significantly across a water body due to depth, currents, and time of day. Sensor readings represent conditions at the monitoring station location. Always exercise caution when swimming and consult local authorities for official safety advisories.