Beaver Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Beaver Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Beaver Lake today is 18.1°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 | 18.7°C | 21.0°C | |
| SEP 15 | 19.2°C | 21.0°C | |
| SEP 16 | 19.1°C | 21.0°C | |
| SEP 17 | 18.7°C | 21.0°C | |
| SEP 18 | 18.5°C | 21.0°C | |
| SEP 19 | 18.3°C | 21.0°C | |
| SEP 20 | 18.2°C | 21.0°C | |
| SEP 21 | 18.1°C | 21.0°C | |
| SEP 22 | 21.0°C | 18.2°C | |
| SEP 23 | 21.0°C | 18.4°C | |
| SEP 24 | 21.0°C | 18.5°C | |
| SEP 25 | 21.0°C | 18.7°C | |
| SEP 26 | 21.0°C | 18.8°C | |
| SEP 27 | 21.0°C | 19.0°C | |
| SEP 28 | 21.0°C | 19.1°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 | 3°C | 6°C |
| February | 2°C | 5°C | 8°C |
| March | 4°C | 8°C | 11°C |
| April | 5°C | 10°C | 15°C |
| May | 11°C | 16°C | 21°C |
| June | 13°C | 19°C | 24°C |
| July | 15°C | 24°C | 31°C |
| August | 18°C | 24°C | 30°C |
| September | 16°C | 21°C | 26°C |
| October | 11°C | 16°C | 20°C |
| November | 6°C | 10°C | 14°C |
| December | 4°C | 7°C | 9°C |
Beaver Lake: Water Temperature by Location
Beaver Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Beaver Lake in Washington experiences the typical seasonal swings of a shallow inland lake in the Pacific Northwest. In spring, surface temperatures commonly range from about 45–60°F (7–16°C) as warming begins after melt and runoff. By summer the surface often warms to roughly 65–75°F (18–24°C), and in particularly warm, calm years shallow bays can reach the upper 70s°F (around 25–26°C). Fall sees a steady cooling back toward 50–60°F (10–16°C) as air temperatures drop, and in winter the lake surface is usually near freezing to the low 40s°F (1–6°C) depending on air temperature and mixing. Deeper or shaded parts remain colder year-round, and sudden weather changes can produce rapid shifts in surface temperatures.
Swimming at Beaver Lake is generally permitted at public access points, which makes recreational swimming common in the warmer months when surface temperatures are most comfortable. Local parks and shorelines provide entry, but swimmers should be mindful of hazards: cold-water shock can occur outside the warmest weeks, and occasional water-quality advisories or algal blooms may prompt temporary closures. Because conditions vary by season and location around the lake, it’s advisable to check current local guidance or posted notices before swimming and to take standard safety precautions such as avoiding solo swims and wearing a life vest if conditions are uncertain.