Lake Ashtabula — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Ashtabula, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Ashtabula today is 20.5°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 3 | 17.9°C | 18.0°C | |
| JUN 4 | 18.8°C | 18.0°C | |
| JUN 5 | 19.6°C | 18.0°C | |
| JUN 6 | 20.1°C | 18.0°C | |
| JUN 7 | 20.3°C | 18.0°C | |
| JUN 8 | 20.3°C | 18.0°C | |
| JUN 10 | 20.5°C | 18.0°C | |
| JUN 11 | 18.0°C | 20.4°C | |
| JUN 12 | 18.0°C | 20.3°C | |
| JUN 13 | 18.0°C | 20.1°C | |
| JUN 14 | 18.0°C | 20.0°C | |
| JUN 15 | 18.0°C | 19.9°C | |
| JUN 16 | 18.0°C | 19.8°C | |
| JUN 17 | 18.0°C | 19.6°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 | 1°C | 7°C | 12°C |
| February | 1°C | 8°C | 15°C |
| March | 1°C | 9°C | 17°C |
| April | 2°C | 11°C | 20°C |
| May | 7°C | 14°C | 21°C |
| June | 14°C | 18°C | 22°C |
| July | 17°C | 20°C | 23°C |
| August | 19°C | 24°C | 28°C |
| September | 16°C | 19°C | 22°C |
| October | 5°C | 11°C | 17°C |
| November | 3°C | 7°C | 10°C |
| December | 1°C | 5°C | 7°C |
Lake Ashtabula: Water Temperature by Location
Lake Ashtabula: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Lake Ashtabula, the reservoir behind Baldhill Dam in North Dakota, experiences marked seasonal swings in water temperature. In spring (April–May) surface temperatures commonly range from roughly 40–60°F (4–16°C) as snowmelt and cool air keep the lake chilly. By early summer (June) the surface often warms to about 60–70°F (15–21°C), with peak midsummer (July–August) temperatures typically reaching 68–80°F (20–27°C) in open, shallow areas. Temperatures begin falling in fall (September–October) toward roughly 45–65°F (7–18°C). In winter the lake generally approaches freezing at 32°F (0°C) and commonly develops ice cover that keeps water temperatures at or below freezing for extended periods.
Swimming is generally permitted in Lake Ashtabula because it is a public recreational reservoir, and many visitors swim during the warmest weeks of July and August when surface temperatures are most comfortable. Conditions vary by location and season: shallow bays warm faster, while deeper or shaded areas remain cool. Visitors should note there may be limited or no lifeguard supervision, boat traffic, and occasional water-quality advisories after heavy runoff or algal blooms, so checking current local conditions and posted signs before swimming is advisable.