Lake Sacajawea — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Sacajawea, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Sacajawea today is 26.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 4 | 26.9°C | 26.0°C | |
| AUG 5 | 26.8°C | 26.0°C | |
| AUG 6 | 26.8°C | 26.0°C | |
| AUG 7 | 26.7°C | 26.0°C | |
| AUG 8 | 26.7°C | 26.0°C | |
| AUG 9 | 26.7°C | 26.0°C | |
| AUG 10 | 26.7°C | 26.0°C | |
| AUG 11 | 26.7°C | 26.0°C | |
| AUG 12 | 26.0°C | 26.7°C | |
| AUG 13 | 26.0°C | 26.6°C | |
| AUG 14 | 26.0°C | 26.6°C | |
| AUG 15 | 26.0°C | 26.6°C | |
| AUG 16 | 26.0°C | 26.5°C | |
| AUG 17 | 26.0°C | 26.5°C | |
| AUG 18 | 26.0°C | 26.5°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 | 1°C | 4°C | 7°C |
| March | 3°C | 7°C | 10°C |
| April | 8°C | 12°C | 15°C |
| May | 13°C | 17°C | 22°C |
| June | 15°C | 19°C | 23°C |
| July | 19°C | 25°C | 31°C |
| August | 22°C | 26°C | 30°C |
| September | 20°C | 23°C | 26°C |
| October | 14°C | 18°C | 21°C |
| November | 5°C | 11°C | 15°C |
| December | 3°C | 6°C | 8°C |
Lake Sacajawea: Water Temperature by Location
Lake Sacajawea: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
Lake Sacajawea’s water temperatures vary considerably through the year because it is a relatively shallow, inland lake in Washington. In early spring the surface water typically sits around 40–60°F (4–16°C) as runoff and cooler air keep it brisk. By summer, surface temperatures commonly warm to roughly 60–75°F (15–24°C) on warm, sunny days, although deeper or shaded spots remain cooler. Fall brings a steady cooling back into the 45–60°F (7–16°C) range as air temperatures drop, and winter surface temperatures frequently fall to about 35–45°F (2–7°C) and can approach freezing at the margins in cold spells.
Swimming is generally possible but comes with caveats. Public access and park areas around the lake allow people to enter the water, and many locals swim during the warmest weeks when surface temperatures are most comfortable. However, there are usually no lifeguards, water quality and clarity can vary, and cooler or changing temperatures make hypothermia a real risk outside peak summer conditions. Boat traffic and submerged hazards also mean swimmers should choose designated or well-used spots, heed posted rules and advisories, and avoid solo or unsupervised swims.