Last week, the BBC reported that seawater along the tip of Florida had exceeded “hot tub” temperatures of 37.8°C (100°F) in recent days, “making it potentially the hottest ever measured”. The Guardian was in fine alarmist form noting that the Florida recording posed a threat to human food supplies and the livelihoods of those working in the water. Similar hysteria was to be found across most of the mainstream media. Alas, curiously missing from all this excitable coverage was a note that just 48 hours later the temperature plummeted to around 85°F.
The reading was taken from a buoy in Manatee Bay which is managed by the Everglades National Park, and located north of Key Largo. The upper left graph below shows that the temperature moved between 90-101°F on consecutive days, then fell away rapidly to around 85°F.