Water temperature in Whidbey Island (WA) in January

Is it warm enough to swim in Whidbey Island in January? Average water temperature in Whidbey Island in January is 46.2°F and therefore is not suitable for comfortable swimming. The warmest sea in Whidbey Island in January is 49.1°F, and the coldest is 43.2°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Whidbey Island

Changes water temperature in Whidbey Island in January 2026, 2025

To get an accurate forecast for the water temperature in Whidbey Island for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Whidbey Island, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of January.

Average water temperature in Whidbey Island in January over a decade

Chart comparing the height of waves in Whidbey Island in January over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

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

The nearest locations with the average water temperature in January. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

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Our report for Whidbey Island 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.