Assunpink Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Assunpink Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Assunpink Lake today is 27.2°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 | 27.6°C | 26.5°C | |
| AUG 5 | 27.6°C | 26.5°C | |
| AUG 6 | 26.9°C | 26.5°C | |
| AUG 7 | 26.9°C | 26.5°C | |
| AUG 8 | 27.1°C | 26.5°C | |
| AUG 9 | 27.0°C | 26.5°C | |
| AUG 10 | 27.2°C | 26.5°C | |
| AUG 11 | 27.2°C | 26.5°C | |
| AUG 12 | 26.5°C | 27.2°C | |
| AUG 13 | 26.5°C | 27.1°C | |
| AUG 14 | 26.5°C | 27.1°C | |
| AUG 15 | 26.5°C | 27.1°C | |
| AUG 16 | 26.5°C | 27.0°C | |
| AUG 17 | 26.5°C | 27.0°C | |
| AUG 18 | 26.5°C | 27.0°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 | 9°C | 15°C | 20°C |
| May | 14°C | 19°C | 24°C |
| June | 18°C | 24°C | 30°C |
| July | 21°C | 27°C | 33°C |
| August | 22°C | 27°C | 31°C |
| September | 20°C | 23°C | 25°C |
| October | 12°C | 16°C | 20°C |
| November | 5°C | 9°C | 13°C |
| December | 1°C | 5°C | 7°C |
Assunpink Lake: Water Temperature by Location
Assunpink Lake: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
Assunpink Lake, the reservoir in Mercer County Park formed by the Assunpink Creek, experiences the same seasonal shifts typical of small to mid-size northeastern lakes. Surface temperatures in winter commonly hover near freezing, roughly 32–40°F (0–4°C). Spring brings steady warming, with surface values often ranging from about 40–65°F (4–18°C) as air temperatures rise and ice melts. In summer the lake can reach its warmest—typical surface readings are in the 70s to low 80s°F (21–28°C) on warm, calm days—while deeper water remains cooler. Fall sees a progressive decline, with surface temperatures commonly falling into the 50–68°F (10–20°C) range. Exact temperatures vary by year, recent weather, wind, and depth; thermal stratification can produce noticeably cooler conditions below the surface even when the top layer is warm.
Swimming at Assunpink Lake is generally not permitted for reasons of public safety and resource management. Park regulations and posted signs commonly prohibit open-water swimming because there are no lifeguards, boat and angling activities create hazards, and underwater hazards and variable depths increase risk. Water quality and habitat protection are also considerations. Visitors seeking swimming opportunities are usually directed to designated beaches or managed waterfront facilities nearby where supervision, permitted water-contact activities, and regular water-quality monitoring are provided.