Long Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Long Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Long Lake today is 18.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| SEP 13 | 19.0°C | 19.0°C | |
| SEP 14 | 17.9°C | 19.0°C | |
| SEP 15 | 19.0°C | 19.0°C | |
| SEP 16 | 18.3°C | 19.0°C | |
| SEP 17 | 18.3°C | 19.0°C | |
| SEP 18 | 18.1°C | 19.0°C | |
| SEP 19 | 18.5°C | 19.0°C | |
| SEP 20 | 18.9°C | 19.0°C | |
| SEP 21 | 19.0°C | 18.2°C | |
| SEP 22 | 19.0°C | 18.3°C | |
| SEP 23 | 19.0°C | 18.3°C | |
| SEP 24 | 19.0°C | 18.4°C | |
| SEP 25 | 19.0°C | 18.4°C | |
| SEP 26 | 19.0°C | 18.4°C | |
| SEP 27 | 19.0°C | 18.5°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 | 2°C | 4°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 0°C | 6°C | 12°C |
| May | 7°C | 12°C | 16°C |
| June | 12°C | 16°C | 20°C |
| July | 18°C | 24°C | 29°C |
| August | 19°C | 22°C | 25°C |
| September | 16°C | 19°C | 22°C |
| October | 11°C | 14°C | 17°C |
| November | 4°C | 9°C | 13°C |
| December | 1°C | 5°C | 7°C |
Long Lake: Water Temperature by Location
Long Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Long Lake in the Town of Long Lake, New York, typically experiences a wide seasonal range in surface water temperatures. In summer months (July–August) surface temperatures commonly rise into the mid‑60s to mid‑70s °F (about 18–24 °C), occasionally reaching the upper 70s °F (around 25 °C) on very warm spells. Spring and fall bring much cooler conditions, with surface water often in the 40s to low 60s °F (about 4–17 °C) as the lake stratifies and mixes. Winter temperatures drop to near freezing at the surface under ice cover, roughly 32–39 °F (0–4 °C) close to the ice, while deeper water remains slightly warmer but still cold compared with summer values.
Swimming is generally possible during the ice‑free season and people commonly swim from shorelines, campsites, and informal beaches, but availability and safety depend on local conditions and any posted advisories. There are no guarantees of lifeguards, and water clarity, currents near inlets/outlets, sudden depth changes, and cold‑water shock in shoulder seasons are considerations. In winter the lake is ice‑covered and routine swimming is not practical; any intentional cold‑water or ice swimming carries significant risks and should only be undertaken with proper experience, safety measures, and local guidance.