For better readability of the table, pass into the landscape mode.
Maine is the most easterly of the United States with an Atlantic coastline and is one of the 6 states, and the largest of the states, that comprise of New England. It is bordered to the north by the Canadian provinces of New Brunswick and Quebec. It’s neighbouring US state to the west is New Hampshire. The state capital of Maine is Augusta, whilst the largest city is Portland.
It comes as no surprise that the coldest month of the year in Maine is January with an average high of 31f/-0.5c and the warmest month of the year being July with an average high of 79f/26c. Throughout the whole year there is regular rainfall averaging just over or just under 4 inches per month. Maine is a dry suit diving state for more or less the whole year, although you might be able to get away with a 7mm during July. The water temperatures vary from 33f/1c in February to 61f/16c at the beginning of August. These figures relate to Portland, but you will find cooler water temperatures in other locations, such as Eastport during the summer months.
Scuba diving in Maine is not overly popular, as most of the activity is done above the water. The conditions can be rather difficult and there are very few dive shops. Beauchamp Point in Camden and Kettle Cove in Casco have good access to the water and are popular locations for beginners. The sea life is interesting, as there are lots of opportunities to dive with seals and you will see many lobsters, but hands off! State law dictates that they can only be caught in lobster traps.