How Hot Marlborough Will Get In Heat Wave This Week: Forecast

MARLBOROUGH, MA — This could be the hottest stretch of 2021 so far.

The National Weather Service on Tuesday morning issued a heat advisory for most of southern New England, predicting that temperatures will likely exceed 100 degrees in most of central and eastern parts of Massachusetts. The heat advisory begins at 11 a.m. Wednesday, and will be followed by an excessive heat watch on Thursday morning.

The Marlborough area could see the heat index reach 105 degrees on Thursday, which is expected to be the hottest day of the week — although Wednesday, Friday and Saturday may also feel at or near 100 degrees, according to the weather service.

This week's heat wave follows a record-setting stretch of heat at the end of June, when heat indices reached the low 100s. The weather service is cautioning residents to avoid strenuous outdoor activity and to drink plenty of fluids.

Here's the National Weather Service heat wave forecast for Marlborough this week:

Wednesday: A slight chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 90. Southwest wind around 9 mph. Chance of precipitation is 20%.

Wednesday Night: A slight chance of showers and thunderstorms, mainly between 10pm and midnight. Partly cloudy, with a low around 73. Southwest wind 6 to 8 mph. Chance of precipitation is 20%.

Thursday: A chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 95. Southwest wind 6 to 9 mph. Chance of precipitation is 30%.

Thursday Night: A chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 74. Southwest wind around 6 mph. Chance of precipitation is 30%.

Friday: A chance of showers between 1pm and 5pm. Mostly sunny, with a high near 94. West wind around 6 mph. Chance of precipitation is 30%.

Friday Night: Partly cloudy, with a low around 71. Southwest wind 3 to 5 mph.

Saturday: A chance of showers. Partly sunny, with a high near 87. West wind 3 to 6 mph. Chance of precipitation is 50%.

Saturday Night: A chance of showers before 10pm. Mostly cloudy, with a low around 65. Light northwest wind. Chance of precipitation is 30%.