Wrt Fire Island, and I know that it's not a buoy comparison, but we went to Fire Island the 2nd Friday of July the years 2009-2012 and I measured the water temp at 10 feet offshore and a depth of 6 inches and it was 74° each time
Watching TCU building along what looks like sea-breeze boundary to the east. Fascinating to see cauliflower-like pulsing. Could watch this all day..but I'm not gonna...