Lake Selmac — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Selmac, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Selmac today is 18.4°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 |
|---|---|---|---|
| JUN 23 | 21.2°C | 18.6°C | |
| JUN 24 | 21.3°C | 18.6°C | |
| JUN 25 | 21.4°C | 18.6°C | |
| JUN 26 | 21.5°C | 18.6°C | |
| JUN 27 | 21.7°C | 18.6°C | |
| JUN 28 | 21.4°C | 18.6°C | |
| JUN 29 | 19.2°C | 18.6°C | |
| JUN 30 | 18.4°C | 18.6°C | |
| JUL 1 | 21.1°C | 18.5°C | |
| JUL 2 | 21.1°C | 18.7°C | |
| JUL 3 | 21.1°C | 18.8°C | |
| JUL 4 | 21.1°C | 18.9°C | |
| JUL 5 | 21.1°C | 19.1°C | |
| JUL 6 | 21.1°C | 19.2°C | |
| JUL 7 | 21.1°C | 19.3°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 | 4°C | 8°C | 11°C |
| February | 4°C | 8°C | 11°C |
| March | 2°C | 7°C | 13°C |
| April | 8°C | 13°C | 17°C |
| May | 9°C | 14°C | 19°C |
| June | 16°C | 19°C | 22°C |
| July | 19°C | 21°C | 24°C |
| August | 16°C | 19°C | 22°C |
| September | 16°C | 18°C | 21°C |
| October | 11°C | 16°C | 20°C |
| November | 7°C | 12°C | 16°C |
| December | 7°C | 11°C | 14°C |
Lake Selmac: Water Temperature by Location
Lake Selmac: Weather Forecast
July 1
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July 3
July 4
July 5
July 6
Location & Local Information
Lake Selmac’s water temperatures follow the seasonal pattern typical of small inland lakes in Oregon. Surface temperatures in winter commonly sit near freezing up to roughly 35–45°F (2–7°C). As spring warms, surface readings often rise into the 45–60°F range (7–16°C). Peak summer afternoons can push surface temperatures to about 60–75°F (16–24°C) depending on air temperature, sunlight and wind, while early fall usually sees a gradual decline back toward the 50–65°F range (10–18°C). Deeper water remains substantially colder year‑round, often staying in the 40s °F (4–9°C) even when the surface is warm; thermal stratification and weather patterns will cause short‑term variability.
Swimming at Lake Selmac is generally possible during the warmer months when surface temperatures are more comfortable, but whether it is allowed depends on local rules, posted signs and current water quality. Managers may close or advise against swimming because of hazards such as strong currents near inlets/outlets, submerged debris, cold shock from deep water, or harmful algal blooms after hot, calm periods. Visitors should check on‑site notices and recent water‑quality reports before entering, and take typical lake‑swimming precautions: avoid sudden immersion in cold water, supervise children, and be mindful of boat traffic.