Doc the easy way though not spot on is to multiple by two and add 30. 27 x 2 + 30 = 84. Wonder if poster meant surface air or surface water temp.
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Resurrecting thread for same question: Expected water temperature late February 2021
TIA
Again?
Again?
https://seatemperature.info/roatan-water-temperature.htmlResurrecting thread for same question: Expected water temperature late February 2021
TIA