I like to think of myself as an adaptable person.
When I lived in Boston I wore uncomfortably fitted, uber stylish dress clothes, planned my life around traffic on 128 and referred to running to the liquor store as "getting beers at the packie." When my career took me to Plattsburgh, NY I downgraded to promotional tee shirts and baseball hats, never saw more than 1 stop light in a row and attended a local drinking night called "Chug a Mug".
My point here is; I go with the flow so when summer brings the big time heat this weekend...I'll adapt and enjoy.
Hopefully you are the same way because the heat is building as we speak. Temperatures across interior Maine this afternoon are in the upper 80s while the coastline hovers in the upper 70s due to a sea breeze. That sea breeze will help coastal areas over the weekend but it won't be enough to prevent high temperatures in the upper 80s even there. Anyhow, look for mostly sunny skies through the rest of the day as high pressure is firmly in place.
After a quiet and relatively comfortable evening, we kick the heat into high gear for Friday. Look for mostly sunny skies with high temperatures in the upper 80s to low 90s in most spots. Again, a sea breeze will develop along the shore but it won't bring as much relief as you'd like. There is a very isolated chance of a shower over northern Maine by the afternoon but we are talking FAR northern Maine (towards Caribou) and the chance is in the 10-15% range.
By Saturday the heat and humidity will reach a fever pitch. I expect widespread readings in the low 90s with dew point in the upper 60s. (The humidity will slowly increase from this afternoon through Sunday, making it pretty sticky for the weekend) The sea breeze helps a bit, but interior spots roast all day long under mostly sunny skies. Realistically when it's THIS hot and humid, I can't totally rule out a stray afternoon thunderstorm but I wouldn't worry too much about it as there will likely only be 2-3 across the entire state.
Sunday will feature a bit more in the way of cloud cover, and as a result temperatures will be a BIT cooler...still we are talking upper 80s in most spots.
The heat and humidity will continue for Monday and Tuesday but the chance of showers and thunderstorms in the afternoon will greatly increase.
A strong cold front will rock through on Wednesday bringing an end to this heat but also bringing some severe thunderstorms with it.
By the way, how did I adapt to Maine? I wear uncomfortably fitted clothes AND the hat, while planning my life around "traffic" on Forest Ave and act shocked any time a bar tab runs over $6.