[Weather] [2025.08.21 PM] NWS Boston EM Briefing: Erin's Impacts to Southeast Coastal New England

[BOX Operations - NOAA Service Account]

Good afternoon, Hurricane Erin is expected to pass well offshore tomorrow,
but some fringe effects will be felt in coastal areas of southern New
England:

High Surf and Rip Currents

   -

   High Surf Advisories are in effect into Saturday for most of the MA and
   RI coastline.
   -

   Ocean beaches with south-facing exposures are most vulnerable and could
   see 15-20 foot breaking waves.
   -

   Water temperatures remain warm and some beachgoers may flock to the
   waters, which could put more people at risk.
   -

   Keep in mind that many beaches no longer have lifeguards for this season.
   -

   Anyone going to view the surf should stay at a safe distance and off
   jetties or piers.


Significant Beach Erosion

   -

   Swell from Erin should result in dune and beach erosion on south facing
   shores late this week, especially on Martha’s Vineyard and Nantucket, as
   well as South County, RI which have had significant erosion over the past
   few winters from nor’easters.


Hazardous Marine Conditions on the Coastal Waters

   -

   Gale Warnings are in effect for most MA and RI coastal waters through
   Friday.
   -

   Gale force NE winds could gust as high as 40 kt on the waters near Cape
   Cod and Nantucket Friday into Saturday with seas of 15-20 feet offshore.
   -

   Small Craft Advisories in effect for Boston Harbor, Massachusetts Bay
   and Narragansett Bay.


Minor Coastal Flooding


   - For Martha's Vineyard and Nantucket:
      - Minor coastal flooding (up to one foot deep) is expected in more
      vulnerable low lying areas near Nantucket Harbor, Edgartown Harbor, Oak
      Bluffs, and possibly Vineyard Haven around high tide late
tonight and again
      late Friday evening.
      - Rough seas up to 8 feet on Nantucket Sound could also bring debris
      onto coastal roadways such as Seaview Avenue in Oak Bluffs near
the seawall.
      - These seas just outside of Nantucket Harbor could also bring some
      deeper flooding (1 to 3 feet deep) to some of the lowest lying areas.

      - For South Coastal Rhode Island (including Narragansett Bay) and
   Massachusetts:
      - Minor coastal flooding (up to one foot deep) is expected in more
      vulnerable low lying areas around high tide Friday morning and
again Friday
      evening.
      Large breaking waves of 15-20 feet could bring debris onto coastal
      roadways around high tide.




Thank you,
NWS Boston/Norton Staff

If you have any questions or would like more information, please don't
hesitate to contact us. You can reach us via:
email: box.operations at noaa.gov
phone: 508.622.3280
Slack/NWSChat 2.0 <https://nwschatws.slack.com/> (for approved partners)
social media: Website <http://www.weather.gov/boston> | Facebook
<http://www.facebook.com/NWSBoston> | Twitter
<http://www.twitter.com/NWSBoston>
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