Lake Stevens — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Stevens, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Stevens today is 19.9°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 |
|---|---|---|---|
| AUG 24 | 20.6°C | 25.0°C | |
| AUG 25 | 20.4°C | 25.0°C | |
| AUG 26 | 20.4°C | 25.0°C | |
| AUG 27 | 20.5°C | 25.0°C | |
| AUG 28 | 20.5°C | 25.0°C | |
| AUG 29 | 20.2°C | 25.0°C | |
| AUG 30 | 20.2°C | 25.0°C | |
| AUG 31 | 19.9°C | 25.0°C | |
| SEP 1 | 21.5°C | 20.0°C | |
| SEP 2 | 21.5°C | 20.1°C | |
| SEP 3 | 21.5°C | 20.1°C | |
| SEP 4 | 21.5°C | 20.2°C | |
| SEP 5 | 21.5°C | 20.3°C | |
| SEP 6 | 21.5°C | 20.4°C | |
| SEP 7 | 21.5°C | 20.5°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 | 3°C | 7°C |
| February | 2°C | 5°C | 8°C |
| March | 4°C | 8°C | 11°C |
| April | 6°C | 11°C | 15°C |
| May | 11°C | 16°C | 21°C |
| June | 12°C | 18°C | 24°C |
| July | 15°C | 23°C | 31°C |
| August | 19°C | 25°C | 30°C |
| September | 17°C | 22°C | 26°C |
| October | 13°C | 17°C | 20°C |
| November | 6°C | 10°C | 14°C |
| December | 4°C | 7°C | 9°C |
Lake Stevens: Water Temperature by Location
Lake Stevens: Weather Forecast
September 1
September 2
September 3
September 4
September 5
Location & Local Information
Lake Stevens is a medium-sized lake in Washington that warms and cools with the seasons, so water temperatures vary considerably. In spring (roughly March through May) surface temperatures are commonly in the mid-40s to about 60°F (7–16°C) as the lake recovers from winter chill. Summer months (June through August) bring the warmest conditions, with surface readings typically ranging from about 65 to 75°F (18–24°C) on sunny afternoons, though shallow bays can be a few degrees warmer. In fall the surface cools back into the 50s to low 60s°F (10–16°C), and winter values often sit between the mid-30s and mid-40s°F (2–7°C). Deeper water stays colder year-round and temperatures can change quickly with weather and wind.
Swimming is generally permitted at Lake Stevens and people commonly enter the water at public parks and beaches during the warmer months, but conditions and rules vary by access point. There are occasional swim advisories for water quality issues such as cyanobacterial blooms, and many sites lack lifeguards, so swimmers should check current local guidance, be aware of cold-shock risk even in summer, and choose sheltered, supervised areas if possible. As with any natural lake, water clarity, temperature stratification, and safety amenities influence whether a particular spot is suitable for swimming.