This data the coastal Mentor on the Lake water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.
Water temperature in Mentor on the Lake today is 71.6°F. Based on our historical data over a period of ten years, the warmest water in this day in the Lake Erie near Mentor on the Lake was recorded in 2018 and was 77.4°F, and the coldest was recorded in 2017 at 69.8°F. Water temperature in Mentor on the Lake is expected to drop to 71.4°F in the next 10 days. September average water temperature in Mentor on the Lake is 71.4°F, the minimum temperature is 64.9°F, and the maximum is 77.4°F.
The swimming season in Mentor on the Lake lasts from July to September. During those months, Mentor on the Lake water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Mentor on the Lake in winter reaches 37.4°F, in spring 43.5°F, in summer the average temperature rises to 71.6°F, and in autumn it is 62.1°F.
September 5, 2025 |
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today temp |
71.6°F |
September 4, 2025 |
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yesterday temp |
71.1°F |
Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Mentor on the Lake. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Mentor on the Lake. Data in table shown for September 5, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
0-3 h | 3-6 h | 6-9 h | 9-12 h |
---|---|---|---|
0' 10" | 1' 1" | 1' 6" | 1' 10" |
0.25 m | 0.32 m | 0.45 m | 0.57 m |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
2' 6" | 3' 0" | 2' 11" | 2' 5" |
0.77 m | 0.91 m | 0.88 m | 0.73 m |
Data in a table show Mentor on the Lake temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast Mentor on the Lake.
0-3 h | 3-6 h | 6-9 h | 9-12 h |
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![]() | ![]() | ![]() | ![]() |
57.4°F | 53.1°F | 51.6°F | 61.5°F |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
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72.9°F | 75.7°F | 75.6°F | 70°F |
You may also be interested in other sections of our site for Mentor on the Lake: Sunrise and Sunset, Tides
These figures shows the average, minimum and maximum monthly water temperature in Mentor on the Lake. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Mentor on the Lake on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve
Month | Avr | Min | Max | |
---|---|---|---|---|
January | 36°F | 30.9°F | 44.4°F | cold |
Water temperature in Mentor on the Lake in January | ||||
February | 33.8°F | 30.9°F | 37.4°F | cold |
Water temperature in Mentor on the Lake in February | ||||
March | 35.4°F | 30.2°F | 42.6°F | cold |
Water temperature in Mentor on the Lake in March | ||||
April | 41.7°F | 32.4°F | 51.6°F | cold |
Water temperature in Mentor on the Lake in April | ||||
May | 53.6°F | 43.2°F | 68.5°F | cold |
Water temperature in Mentor on the Lake in May | ||||
June | 65.5°F | 54°F | 75.2°F | cold |
Water temperature in Mentor on the Lake in June | ||||
July | 74.5°F | 66.6°F | 81°F | warm |
Water temperature in Mentor on the Lake in July | ||||
August | 75°F | 67.6°F | 79.5°F | warm |
Water temperature in Mentor on the Lake in August | ||||
September | 71.4°F | 64.9°F | 77.4°F | warm |
Water temperature in Mentor on the Lake in September | ||||
October | 62.8°F | 54.7°F | 71.4°F | cold |
Water temperature in Mentor on the Lake in October | ||||
November | 52°F | 42.8°F | 60.6°F | cold |
Water temperature in Mentor on the Lake in November | ||||
December | 42.6°F | 35.1°F | 51.4°F | cold |
Water temperature in Mentor on the Lake in December |