PHOTOS: Are You Ready For The Heat?

Swimmers enjoyed a perfect summer day at Esker Point Beach in Groton Thursday, but temperatures and humidity were expected to rise this weekend across the region.

The Weather Service forecast an air quality index for Groton today that may be unhealthy for sensitive groups, such as people with lung disease, older adults and children. Temperatures were expected to cool off some tonight.

Carolyn Schulz, said she'll be building a sailboat this weekend with her husband, son and daughter-in-law at the wooden boat show in Mystic.

"I'm hoping the breeze off the water will keep us cool under the tent," she said.

The extended weather forecast for Groton, according to National Weather Service, is below:

Today: A chance of showers and thunderstorms, mainly between 8am and noon. Mostly sunny, with a high near 84. Southwest wind between 6 and 11 mph. Chance of precipitation is 30%.

Tonight: Partly cloudy, with a low around 65. Southwest wind at 8 mph becoming north.

Saturday: Mostly sunny, with a high near 81. West wind between 3 and 10 mph.

Saturday Night: Partly cloudy, with a low around 69.

Sunday: Mostly sunny, with a high near 83.

Sunday Night: Partly cloudy, with a low around 69.

Monday: Mostly sunny, with a high near 83.

Monday Night: Partly cloudy, with a low around 67.