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Water temperature in Lake Washington (WA) in October

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Is it warm enough to swim in Lake Washington in October? Average water temperature in Lake Washington in October is 54.3°F and therefore is not suitable for comfortable swimming. The warmest water in Lake Washington in October is 64.4°F, and the coldest is 42.8°F. To find out the water temperature today and in the coming days, go to Current water temperature in Lake Washington

Changes water temperature in Lake Washington in October 2025, 2024

To get an accurate forecast for the water temperature in Lake Washington for any chosen month, compare two years within a 10 year range using the chart below.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024
October 160.8°F55.4°F
October 259°F53.6°F
October 359°F55.4°F
October 457.2°F55.4°F
October 557.2°F55.4°F
October 657.2°F55.4°F
October 755.4°F55.4°F
October 855.4°F57.2°F
October 955.4°F55.4°F
October 1055.4°F57.2°F
October 1153.6°F57.2°F
October 1251.8°F57.2°F
October 1351.8°F57.2°F
October 1450°F55.4°F
October 1550°F55.4°F
Day 2025 2024
October 1650°F55.4°F
October 1750°F55.4°F
October 1850°F55.4°F
October 19 55.4°F
October 20 53.6°F
October 21 51.8°F
October 22 51.8°F
October 23 51.8°F
October 24 51.8°F
October 25 51.8°F
October 26 50°F
October 27 50°F
October 28 50°F
October 29 50°F
October 30 50°F
October 31 48.2°F

Average water temperature in Lake Washington in October over a decade

20152016201720182019
54.3°F53.6°F50.2°F
20202021202220232024
55°F52.7°F59.7°F55.2°F54°F

Lake Washington water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in October?

Want to know where the water temperature in October is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

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Our report for Lake Washington is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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