Flathead Lake Sea Temperature in April
Looking to find out what the average sea water temperature in Flathead Lake is for April? Find out what the lowest, highest, and average water temperatures are for Flathead Lake over the past 10 years.
Average water temperature in Flathead Lake for April
The average, high, and low temperatures below should help you if you can swim in the water in Flathead Lake in April.
8.85° C
(47.94° F)
- highest: 11.01° C (51.82° F)
- lowest: 7.61° C (45.7° F)
This water is very cold and can cause pain. We don't recommend you swim in this temperature for anything other than very short swims of 5 to 10 minutes unless you are a very experienced cold water swimmer.
Water temperature range by day in April in Flathead Lake
The chart below shows the range of low and high temperatures by day for the month of April in Flathead Lake.
Water temperatures for April in Flathead Lake in recent years
Data source and citation
Raw data for the calculations made to find the sea surface temperature in Flathead Lake comes from the National Oceanic and Atmospheric Administration (NOAA) and their 1/4° daily Optimum Interpolation Sea Surface Temperature.
The water temperature data is constructed by combining observations from different platforms (satellites, ships, buoys, and Argo floats) on a regular global grid. A spatially complete sea surface temperature map is then built by interpolating to fill in gaps in the data.
If you'd like to use any of the information above in the format it is presented, please use the citation tool below.
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<a href="http://seatemperatures.net/north-america/united-states/flathead-lake-april-temperature/">Flathead Lake Sea Temperature in April</a>
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"Flathead Lake Sea Temperature in April". SeaTemperatures.net. Accessed on April 29, 2024. http://seatemperatures.net/north-america/united-states/flathead-lake-april-temperature/.
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"Flathead Lake Sea Temperature in April". SeaTemperatures.net, http://seatemperatures.net/north-america/united-states/flathead-lake-april-temperature/. Accessed 29 April, 2024
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Flathead Lake Sea Temperature in April. SeaTemperatures.net. Retrieved from http://seatemperatures.net/north-america/united-states/flathead-lake-april-temperature/.