Lake Washington — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Washington, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Washington today is 24.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 | 25.0°C | 25.9°C | |
| SEP 15 | 25.1°C | 25.9°C | |
| SEP 16 | 24.5°C | 25.9°C | |
| SEP 17 | 25.4°C | 25.9°C | |
| SEP 18 | 25.2°C | 25.9°C | |
| SEP 19 | 25.0°C | 25.9°C | |
| SEP 20 | 24.9°C | 25.9°C | |
| SEP 21 | 24.9°C | 25.9°C | |
| SEP 22 | 25.9°C | 25.0°C | |
| SEP 23 | 25.9°C | 25.0°C | |
| SEP 24 | 25.9°C | 25.1°C | |
| SEP 25 | 25.9°C | 25.1°C | |
| SEP 26 | 25.9°C | 25.2°C | |
| SEP 27 | 25.9°C | 25.2°C | |
| SEP 28 | 25.9°C | 25.3°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 | 6°C | 10°C | 14°C |
| February | 3°C | 9°C | 15°C |
| March | 8°C | 14°C | 20°C |
| April | 14°C | 19°C | 25°C |
| May | 19°C | 23°C | 27°C |
| June | 21°C | 25°C | 29°C |
| July | 23°C | 30°C | 36°C |
| August | 23°C | 28°C | 33°C |
| September | 21°C | 26°C | 31°C |
| October | 19°C | 23°C | 27°C |
| November | 11°C | 16°C | 21°C |
| December | 9°C | 13°C | 16°C |
Lake Washington: Water Temperature by Location
Lake Washington: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Lake Washington in Mississippi typically follows the seasonal patterns of shallow southern lakes, with surface temperatures that rise and fall with air temperature and river influence. In winter (December–February) surface water commonly ranges from about 45–55°F (7–13°C). Spring (March–May) usually warms to roughly 55–70°F (13–21°C) as days lengthen and sunlight increases. Peak summer readings (June–August) often reach about 75–90°F (24–32°C) at the surface on hot, calm days, while autumn (September–November) generally cools back toward 60–75°F (16–24°C). Actual temperatures vary with depth, recent weather, and river flows, and small-scale factors like shading and groundwater seeps can produce local differences.
Swimming in Lake Washington is physically possible and commonly done in suitable spots, but conditions determine whether it is advisable. There are not many formal lifeguarded beaches on small oxbow lakes, and local regulations or posted advisories may restrict access at certain times for safety or water‑quality reasons. Hazards can include submerged trees and snags, boat traffic, variable currents, and occasional algal blooms or elevated bacteria after heavy rains, so swimmers should heed signage, check with local authorities about current water‑quality reports, and use caution when entering the water.