Forecast: Heat Wave Begins This Weekend

Update: Boston Mayor Marty Walsh has declared a heat emergency for Saturday. Cooling centers and swimming pools at Boston Centers for Youth & Families will be open.

Epstein's earlier weekend forecast:

If you like the heat and humidity, the upcoming weather is just for you.

If you picked this weekend and next week for your beach vacation, you did a great job. Although, it may be a bit hot if you're not right by the water.

Heat waves are nothing new to New England, but some inland areas may start piling up enough 90-degree days to make this one of the longer heat waves in the record books. A heat wave is when the temperature is at 90 or above for three days or more each day.

The heat will begin Saturday. A few spots may touch 90 Friday afternoon, but it's really the weekend during which the hot weather will hit.

Sunday is a very hot day, with temperatures in the mid- to upper 90s inland, but this entire time it will be cooler over Cape Cod and the Islands, as well as the outer tip of Cape Ann.

I'm not looking for any precipitation over the weekend, just a lot of sunshine — perhaps a little bit of early morning fog over Cape Cod. The next chance of any showers or thunderstorms may come sometime Tuesday evening, but that's so far away that it's not worth worrying about.

The heat wave likely breaks sometime next weekend. So if you're not looking forward to the heat, you have quite a ways to go.

You can follow my updates here and on Twitter @growingwisdom.

Friday: Sunshine returns and still muggy and warm. 80s to near 90; 70s Cape and the Islands.

Friday Night: Muggy and warm. Lows 65-71.

Saturday: Sunny and hot. Highs 90-95.

Sunday: Hazy, hot and moderately humid. Highs in the 90s inland, 70s to mid-80s at the beaches/Cape and the Islands.

Monday: Sunshine and hot. Highs in the lower 90s. Cooler coast/Cape Cod.

Tuesday: Sunshine, some clouds. Hot inland. Highs 90-95. Cooler coast/Cape Cod.