Special Marine Warning Issued for Boston Harbor and Coastal Waters
This alert is no longer in effect.
NOAA issued it on April 15, 2026, 4 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.
The National Weather Service has issued a Special Marine Warning for Boston Harbor, Cape Cod Bay, and surrounding offshore waters until 9:30 PM EDT, with wind gusts up to 40 knots posing risks to small craft.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Coastal Massachusetts Waters
- Issued
- April 15, 2026
- Issuing authority
- NWS Boston
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 4 months ago; use the issuing agency's live warning service for current conditions in Coastal Massachusetts Waters.
Alert Details
The National Weather Service (NWS) Boston/Norton MA has issued a Special Marine Warning. This alert is effective from 8:24 PM EDT on April 14, 2026, until 9:30 PM EDT on the same day.
Affected Areas
The warning affects the following marine zones: Boston Harbor; Cape Cod Bay; Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary; Massachusetts Bay and Ipswich Bay; Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM offshore.
What You Should Do
Mariners should seek safe shelter immediately, as gusty winds and increasing waves are expected. Avoid venturing out in affected areas to prevent damage to small craft.
Expected Conditions
The alert includes hazards such as wind gusts to 40 knots, along with a line of heavy showers and gusty northwest winds moving east at 45 knots. Small craft could be damaged due to these conditions.
Timeline
The warning is effective from 8:24 PM EDT on April 14, 2026, and ends at 9:30 PM EDT on April 14, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
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 (1,026 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 15, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.