Todays Weather in Boston · 17 May 2026 · 3 min

Todays Weather in Boston - Sunday - 17 May 2026

Boston is heading into a potential record-breaking heat wave with temperatures hitting 90–91°F Tuesday and Wednesday, followed by a severe weather threat Wednesday afternoon. Get the full Greater Boston forecast: weekend sunshine, coastal cooling, and what to prepare for before the cold front arrives.

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Todays Weather in Boston - Sunday - 17 May 2026

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What's covered

Record Heat Boston This Week

Boston. Ninety degrees is coming, and it might be a record.

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Perfect Weekend Before the Heat

Before we get there, the weekend is genuinely lovely. Today you're looking at the low seventies, plentiful sunshine, and mild breezes.

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Monday Coastal Cooling Detail

Monday is where it gets a little more nuanced. If you're on the coast, sea breezes push in and keep things a touch cooler.

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Record-Breaking Tuesday Wednesday

Tuesday and Wednesday are the days to prepare for. The heat builds fast.

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Wednesday Severe Weather Threat

Here's the catch. Wednesday afternoon doesn't just bring heat.

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Cooler End of Week Pattern

Once that front clears through, temperatures drop. The end of the week brings relief, and the pattern shifts back toward something more seasonal.

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