Green Lane Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Green Lane Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Green Lane Reservoir today is 22.6°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 |
|---|---|---|---|
| SEP 14 | 22.2°C | 22.0°C | |
| SEP 15 | 23.6°C | 22.0°C | |
| SEP 16 | 23.7°C | 22.0°C | |
| SEP 17 | 23.0°C | 22.0°C | |
| SEP 18 | 21.8°C | 22.0°C | |
| SEP 19 | 22.5°C | 22.0°C | |
| SEP 20 | 22.9°C | 22.0°C | |
| SEP 21 | 22.6°C | 22.0°C | |
| SEP 22 | 22.0°C | 22.6°C | |
| SEP 23 | 22.0°C | 22.5°C | |
| SEP 24 | 22.0°C | 22.5°C | |
| SEP 25 | 22.0°C | 22.5°C | |
| SEP 26 | 22.0°C | 22.5°C | |
| SEP 27 | 22.0°C | 22.4°C | |
| SEP 28 | 22.0°C | 22.4°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 | 4°C | 7°C |
| February | 1°C | 4°C | 7°C |
| March | 1°C | 6°C | 11°C |
| April | 10°C | 15°C | 20°C |
| May | 14°C | 18°C | 22°C |
| June | 16°C | 23°C | 30°C |
| July | 18°C | 26°C | 33°C |
| August | 20°C | 26°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 | 2°C | 5°C | 7°C |
Green Lane Reservoir: Water Temperature by Location
Green Lane Reservoir: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Green Lane Reservoir’s water temperatures vary widely through the year and with depth. In spring the surface generally runs cool, often in the 40s to low 60s °F (roughly 4–16 °C) as runoff and seasonal cooling dominate. By early to mid‑summer surface temperatures commonly rise into the mid‑60s to upper‑70s °F (about 18–26 °C), with the warmest patches on shallow, sun‑exposed bays; however, deeper water can remain substantially colder year‑round. In autumn the surface cools back into the 40s–60s °F (7–16 °C) range, and in winter the reservoir can approach freezing with surface temperatures near 32–40 °F (0–4 °C) and occasional ice cover in cold spells. These are approximate ranges; actual conditions depend on weather, inflow, and depth.
Swimming in the reservoir itself is generally not permitted at Green Lane due to safety and resource‑management reasons. Restrictions reflect concerns about sudden cold water and depth changes, submerged hazards, boat traffic, and the need to protect water quality and reservoir operations. Cold, deep water also raises hypothermia risk even in summer months for unprepared swimmers. Recreational opportunities such as boating and fishing are offered under park rules, but formal beach swimming is not provided at the reservoir, so visitors should follow posted regulations and use designated areas for water contact if available elsewhere in the park.