Water temperature in Lake Almanor (CA) in December

Is it warm enough to swim in Lake Almanor in December? Average water temperature in Lake Almanor in December is 46.8°F and therefore is not suitable for comfortable swimming. The warmest water in Lake Almanor in December is 53.8°F, and the coldest is 39.6°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Lake Almanor

Changes water temperature in Lake Almanor in December 2025, 2024

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

Average water temperature in Lake Almanor in December over a decade

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

Places with the warmest average sea water temperature in California in December. 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 Lake Almanor 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.