MAINE MONITOR • January 22, 2023
Maine’s Department of Marine Resources has maintained a hidden treasure in Boothbay Harbor for nearly 120 years — a daily measurement of sea surface temperatures, which provides an uncommonly long record of a warming ocean. They show a rough increase of 4 to 5 degrees Fahrenheit on average, from an annual average of 45.3 degrees F (or 7.4 Celsius) at the turn of the 20th century to just over 50 degrees F in recent years.