Boston started Thursday, May 21, under a mostly cloudy sky, with Logan Airport reporting about 64°F and a light northeast breeze. Even with the mild early reading, highs are only expected to reach the low 60s as cooler, drier air moves back in and keeps much of the region sun-starved. Scattered light showers are possible along the southern suburbs during the morning commute before skies clear out for a chilly night.
Afternoon Commute And Tonight
Scattered showers may linger into the morning commute, especially toward southeastern neighborhoods, although the overall rain chance stays low, around 10 to 15 percent. Northeast winds of roughly 5 to 10 mph will keep temperatures stuck in the low 60s, then relax as readings fall to a low near 47°F under partly cloudy skies tonight. Boaters should note that a Small Craft Advisory was in effect early Thursday for some nearshore waters; check the National Weather Service Boston/Norton marine forecast for current details.
Weekend Outlook
Friday, May 22, 2026, looks like the mild outlier, with mostly sunny skies and highs near 59°F. After that, the holiday weekend turns cooler. Saturday, May 23, 2026, is expected to be mostly cloudy with highs near 59°F and only a small daytime rain risk, while showers become more likely late Saturday night into Sunday.
Sunday, May 24, 2026, is shaping up as the wettest day of the holiday weekend, with rain showers, breezy east winds, and highs in the mid 50s. This flip from a heat advisory earlier in the week is noted in the flip from a heat advisory earlier in the week.
Memorial Day Plans
Memorial Day on Monday, May 25, 2026, should be cooler than many had hoped, with a chance of showers and a high near 63°F. If you are planning cookouts or heading to ceremonies and remembrances, it is worth having a wet-weather backup. Conditions are expected to improve by Tuesday, with a warmer, drier stretch returning into midweek.
What This Means For You
Plan on layers for the holiday weekend, and keep a compact umbrella handy for Sunday and Monday outdoor plans. If you are heading to the harbor, monitor the marine forecast and be ready for gusty, blustery conditions Sunday that could make small-boat outings rough.
