Most of the state will see temperatures reach the 90s in a heat wave that will last through the weekend, according to the National Weather Service.

The hot weather will come with sunny skies statewide, including along New Hampshire beaches, said James Brown, a meteorologist with the weather service.

“You're certainly going to make the 90s” today on the Seacoast, Brown said. “You should get into the 90s in most places inland as well.

“Even in the north, they're going to get well into the 80s,” Brown said.

According to a National Weather Service forecast, Manchester will be sunny with a high temperature of 95 degrees today.

On Friday, the New Hampshire Department of Health and Human Services issued an advisory to remind people to take precautions to avoid heat-related illnesses.

“Even though we may know what steps to take to prevent heat-related illnesses, they can come on quickly and we may not recognize the symptoms,” state Public Health Director Dr. Jose Montero said in a statement.

The advisory said people should limit their time outside, wear light-weight clothing, drink plenty of water and avoid hard, physical labor or exercise, especially during the hottest parts of the day. Caffeine and alcohol should also be avoided, the advisory said.

Symptoms of heat stroke include red skin that is hot to the touch, changes in consciousness, a rapid, weak pulse and rapid, shallow breathing, the advisory said.

Someone experiencing those symptoms should be moved somewhere cool and provided with water. Emergency medical help “should be called immediately because heat stroke can be life-threatening,” the advisory said.

Temperatures will begin to decrease Sunday, which has a forecasted high of 90 degrees, before going to the low 80s starting Monday.

“We're going to have this cool air try to come down from Canada” to lower temperatures, Brown said.

The holiday week could also see isolated patches of rain, according to forecasts.

“You have some disturbances coming through that could cause some showers and thunderstorms,” he said. “It's going to be so scattered that you might not even see them.”