Newton Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Newton Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Newton Lake today is 23.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 | 20.4°C | 23.5°C | |
| JUN 4 | 21.2°C | 23.5°C | |
| JUN 5 | 21.7°C | 23.5°C | |
| JUN 6 | 22.1°C | 23.5°C | |
| JUN 7 | 23.0°C | 23.5°C | |
| JUN 8 | 23.1°C | 23.5°C | |
| JUN 10 | 23.5°C | 23.5°C | |
| JUN 11 | 23.5°C | 23.5°C | |
| JUN 12 | 23.5°C | 23.5°C | |
| JUN 13 | 23.5°C | 23.5°C | |
| JUN 14 | 23.5°C | 23.5°C | |
| JUN 15 | 23.5°C | 23.5°C | |
| JUN 16 | 23.5°C | 23.5°C | |
| JUN 17 | 23.5°C | 23.5°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 | 7°C | 12°C |
| April | 10°C | 15°C | 20°C |
| May | 14°C | 19°C | 24°C |
| June | 17°C | 24°C | 30°C |
| July | 26°C | 30°C | 33°C |
| August | 24°C | 28°C | 31°C |
| September | 20°C | 23°C | 25°C |
| October | 12°C | 18°C | 23°C |
| November | 5°C | 10°C | 14°C |
| December | 3°C | 5°C | 7°C |
Newton Lake: Water Temperature by Location
Newton Lake: Weather Forecast
June 9
June 10
June 11
June 12
Location & Local Information
Newton Lake in northern New Jersey follows the seasonal pattern typical of small inland lakes in the region. Surface water temperatures in winter often hover near freezing — about 32°F (0°C) to the low 40s°F (around 4–6°C) — and the lake can develop ice cover in cold spells. Spring brings a steady rise, with surface readings commonly between 40–60°F (4–16°C) as the water mixes and warms. Summer is when the lake is warmest: daytime surface temperatures frequently reach the low to upper 70s°F (21–27°C) and on hot, calm days can approach the low 80s°F (27–29°C), while deeper water remains noticeably cooler. In autumn the surface cools again to roughly 50–65°F (10–18°C) before the lake returns to winter conditions. Thermal stratification can cause significant differences between surface and bottom temperatures during summer.
Swimming opportunities at Newton Lake depend on local management, signage, and seasonal health advisories rather than the temperature alone. In many small New Jersey lakes, swimming is permitted in designated areas during the warmer months when surface temperatures reach the comfortable mid-60s to mid-70s°F (18–24°C) and water quality is acceptable, but it may be restricted or limited by private ownership, lack of lifeguards, safety concerns (cold shock, submerged hazards), or water-quality issues such as bacterial contamination or algal blooms. Visitors should obey posted rules and check municipal or health department notices before entering the water.