Manasquan Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Manasquan Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Manasquan Reservoir today is 26.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 4 | 27.9°C | 27.0°C | |
| AUG 5 | 27.8°C | 27.0°C | |
| AUG 6 | 26.5°C | 27.0°C | |
| AUG 7 | 26.5°C | 27.0°C | |
| AUG 8 | 26.7°C | 27.0°C | |
| AUG 9 | 26.7°C | 27.0°C | |
| AUG 10 | 26.7°C | 27.0°C | |
| AUG 11 | 26.7°C | 27.0°C | |
| AUG 12 | 27.0°C | 26.8°C | |
| AUG 13 | 27.0°C | 26.8°C | |
| AUG 14 | 27.0°C | 26.8°C | |
| AUG 15 | 27.0°C | 26.8°C | |
| AUG 16 | 27.0°C | 26.9°C | |
| AUG 17 | 27.0°C | 26.9°C | |
| AUG 18 | 27.0°C | 26.9°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 | 4°C | 7°C |
| February | 0°C | 4°C | 7°C |
| March | 1°C | 6°C | 11°C |
| April | 8°C | 14°C | 20°C |
| May | 15°C | 19°C | 23°C |
| June | 18°C | 24°C | 30°C |
| July | 23°C | 28°C | 33°C |
| August | 23°C | 27°C | 31°C |
| September | 19°C | 22°C | 25°C |
| October | 12°C | 16°C | 19°C |
| November | 5°C | 9°C | 13°C |
| December | 1°C | 5°C | 7°C |
Manasquan Reservoir: Water Temperature by Location
Manasquan Reservoir: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
The Manasquan Reservoir in Howell, New Jersey, typically shows pronounced seasonal changes in water temperature. Surface readings in winter commonly hover near freezing up to about 32–45°F (0–7°C), while spring warming moves temperatures into roughly 45–60°F (7–16°C). In summer the surface can warm to roughly 68–82°F (20–28°C) on sunny days, though deeper layers remain much cooler because the reservoir stratifies. By fall temperatures usually fall back into the 50–65°F (10–18°C) range as cooling and turnover begin. These figures are approximate and vary with weather, air temperature, wind, and the time of day; deeper water remains several degrees colder than surface values throughout most of the year.
Swimming in the Manasquan Reservoir is not permitted. The restriction exists both to protect public safety—there are no lifeguards and the reservoir has steep banks, varying depths, and boat traffic—and to safeguard the water supply and ecology managed by local park authorities. Recreational use is focused on permitted boating, fishing, and trail activities rather than open-water swimming, so visitors seeking a swim should look for designated beaches or municipal pools that provide lifeguards and water-quality monitoring.