Green Peter Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Green Peter Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Green Peter Lake today is 19°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 14 | 19.8°C | 18.0°C | |
| SEP 15 | 19.1°C | 18.0°C | |
| SEP 16 | 19.3°C | 18.0°C | |
| SEP 17 | 18.9°C | 18.0°C | |
| SEP 18 | 18.9°C | 18.0°C | |
| SEP 19 | 19.0°C | 18.0°C | |
| SEP 20 | 19.0°C | 18.0°C | |
| SEP 21 | 19.0°C | 18.0°C | |
| SEP 22 | 18.0°C | 19.0°C | |
| SEP 23 | 18.0°C | 18.9°C | |
| SEP 24 | 18.0°C | 18.9°C | |
| SEP 25 | 18.0°C | 18.8°C | |
| SEP 26 | 18.0°C | 18.8°C | |
| SEP 27 | 18.0°C | 18.7°C | |
| SEP 28 | 18.0°C | 18.7°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 | 8°C |
| February | 0°C | 4°C | 8°C |
| March | 1°C | 5°C | 10°C |
| April | 6°C | 11°C | 15°C |
| May | 10°C | 16°C | 21°C |
| June | 11°C | 17°C | 23°C |
| July | 13°C | 20°C | 26°C |
| August | 16°C | 22°C | 27°C |
| September | 14°C | 18°C | 22°C |
| October | 10°C | 12°C | 15°C |
| November | 4°C | 8°C | 11°C |
| December | 4°C | 7°C | 10°C |
Green Peter Lake: Water Temperature by Location
Green Peter Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Green Peter Lake, a reservoir in Oregon, experiences a wide range of surface water temperatures through the year. In winter the lake’s surface commonly cools to roughly 34–45°F (1–7°C), often feeling biting to the touch. Spring brings gradual warming, with surface readings typically in the 45–60°F (7–16°C) range as runoff and sunnier days raise the temperature. Peak summer surface temps commonly reach the low to mid 60s up into the 70s°F (about 15–24°C), with the warmest, sun-exposed shallows sometimes bordering the mid-70s°F (around 24°C). By autumn the lake cools again, generally settling into about 50–65°F (10–18°C) before the winter chill returns. Deeper water stays noticeably colder year-round.
Swimming is permitted at Green Peter in managed recreation areas and at various access points, but conditions dictate whether it’s comfortable or advisable. Designated day-use sites provide places to enter the water, yet there are no lifeguards at most locations and boat traffic, sudden drop-offs, submerged hazards and cold temperatures can make swimming risky. Because the reservoir can stratify and release cold water from depth, even summer swims may feel chilly; visitors are advised to assess conditions, wear a life jacket if boating, and supervise children closely.