June is when Maine wakes up. The lupines bloom, the days are long, the ocean is still cold, and the crowds have not yet reached their July peak. It is also the end of black fly season, which matters a great deal if you plan to be in the woods. Here is what to expect and how to plan around it.
Looking ahead to the summer peak? See Maine in July for weather, July 4 planning and beach guides.
Quick Answers
- Weather: In Portland, June averages a high of about 74°F and a low of about 55°F.
- Rain: About 4 inches in an average June in Portland.
- Black flies: Worst in the North Woods early in the month, and mildest on the southern coast.
- Lupines: Peak bloom is around mid-June.
- Crowds: Lighter than July and August, especially early in the month.
- Southern coast and Portland: About May 20 to June 15, and the mildest, helped by sea breezes.
- Midcoast: About May 15 to June 20.
- Downeast and Acadia: About May 15 to June 25.
- Western mountains: About May 10 to June 30.
- Moosehead Lake, the North Woods and Katahdin: About May 15 to July 5, and the worst place in the state to camp in the first half of June.
- Aroostook: About May 20 to July 10, the last region to clear.
- Walk the coast: Cool, long days suit the Midcoast, Camden and the harbor towns.
- Watch for moose: Cows are seen with newborn calves in May and June. See our moose watching guide and Lazy Tom Bog, and remember the 75 foot rule.
- Go fishing: Anyone 16 or older needs a license. See the Maine fishing license guide.
- Visit a beach: The sand is lovely, though the water is cold. See our Maine beaches guide.
Weather in June
According to the National Weather Service’s 1991 to 2020 normals, Portland averages a daytime high of 73.6°F and an overnight low of 55.0°F in June, with about 4.15 inches of rain. Evenings on the coast are cool, so bring a layer. Inland and in the mountains, mornings can be cooler still. Ocean water stays cold, so swimming is for the brave until later in summer.
Black Flies in June
Black fly season usually runs from late April into June, and it varies by region. A seasonal guide lists these typical windows:
These are rough windows, not forecasts, and waterside spots are usually worse than open, breezy ones. Pack a head net, long sleeves and long pants if you are heading into the woods, and be ready to switch plans if the bugs are bad. If you want the woods without the flies, the coast is the safer bet in early June.
Lupines
Lupines bloom briefly in mid-June, and the show is short. Look for them in coastal meadows and along roadsides, especially in the Midcoast around Round Pond and New Harbor. Aroostook County also celebrates its flower season later in summer.
What to Do in June
Who June Suits
June suits travelers who want long days, light crowds and better lodging prices than midsummer, and who are happy with cool water. It is less ideal for camping in the North Woods or for anyone who hates bugs. If swimming is the goal, wait for July or August. See Maine in summer, or Maine in spring if you are earlier in the year, and our guide to the best time to visit Maine.
Maine in June FAQ
Is June a good time to visit Maine?
Yes, especially on the coast. Days are long, lupines are in bloom and crowds are lighter than in July and August.
Are there black flies in Maine in June?
Yes, in many regions, especially the North Woods, where they last longest. The southern coast is the mildest.
Can you swim in Maine in June?
The ocean is still cold, so most people wade. Lakes warm up faster than the ocean.
What should I pack for Maine in June?
Layers, a rain jacket and bug protection if you are heading into the woods.