Water and sea temperature in Grenell Island (30th March 2024)
The average water temperature for Grenell Island today is 39°F
Average water/sea temperatures this week for Grenell Island
What wetsuit thickness is needed for Grenell Island?
The water temperature in Grenell Island is very cold. You should consider wearing a 6/5 mm to 6/5/4 mm full sealed and taped suit with boots, gloves and a hood particularly if you plan to be swimming in the water for extended periods of time.
Please note: These are general guidelines based on today's average water temperature of 39°F in Grenell Island. If there are strong winds, cold air temperatures, you are engaging in activities with less movement or you get cold easily, you may want to consider a thicker wetsuit. consider a thicker wetsuit.
Information about our water / sea temperature data for Grenell Island
Our measurements for the water temperature in Grenell Island, Jefferson County, United States are provided by the daily sea surface temperature (SST) satellite readings from NOAA.
Please be aware that our water temperatures are based on open water averages. Actual sea surface water temperatures close to the shore at Grenell Island can vary by several degrees.
Weather patterns that can increase variation in water temperatures
Heavy rains, locations near river mouths and long periods of strong offshore winds can cause variations in ocean temperatures. Offshore winds cause the colder deep water to replace the surface water which has been warmed by the sun.
Whilst sea temperatures for Grenell Island are as accurate as current data allows, there may be slight local and regional variations depending on conditions and variations in sea depth.
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