Special Marine Warning Issued for Boston Harbor and Massachusetts Bay
This alert is no longer in effect.
NOAA issued it on May 31, 2026, 2 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Boston/Norton has issued a Special Marine Warning for Boston Harbor, Massachusetts Bay, and nearby coastal waters until 6:45 PM EDT due to strong thunderstorms with wind gusts of 34 knots or greater.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Boston Harbor and Massachusetts Bay
- Issued
- May 31, 2026
- Issuing authority
- NWS Boston/Norton MA
Marine notices apply to named waters or shoreline zones. They may not describe conditions on land, even when the nearest place name is the same.
Record status: historical. It was issued 2 months ago; use the issuing agency's live warning service for current conditions in Boston Harbor and Massachusetts Bay.
Alert Details
A Special Marine Warning has been issued by the National Weather Service Boston/Norton MA. The alert is effective from May 19, 2026 at 5:51 PM EDT until May 19, 2026 at 6:45 PM EDT.
Affected Areas
The warning covers Boston Harbor; Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary; Massachusetts Bay and Ipswich Bay; and Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM.
What You Should Do
Move to safe harbor immediately as gusty winds and high waves are expected. Frequent lightning is occurring with these storms. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects.
Expected Conditions
At 5:50 PM EDT, strong thunderstorms were located along a line extending from near The Coastal Waters East Of Cape Ann to Boston, moving east at 30 knots. Hazard includes wind gusts 34 knots or greater. Small craft could be damaged in briefly higher winds and suddenly higher waves.
Timeline
The alert is in effect from 5:51 PM EDT to 6:45 PM EDT on May 19, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,084 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to May 31, 2026.
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Common questions about this NWS weather alert.