I’m going to assume you’ve done a lot of research on climate, so I’ll just point you to some sources.
For climate science and some good maps, I’d check Woods Hole/USGS, MIT, and UMass.
Boston Harbor Association put out a brand new adaptation report, but on first glance it looks vague.
You might be surprised by calling the folks at Mass/DCR, they’re actually real friendly on the phone.
You may want to look into orgs that do disaster, conservation, and beach erosion management work on the Cape (possibly Manomet, but definitely check with MassDOT).
And I’m sure the Army Corps of Engineers has their hands in the harbor (the Corps websites are a nightmare, so be persistent. There are hidden gems!).
The City of Boston’s climate report is embarrassingly weak. But, you should scour the authors and sources of the report for leads.
VHB, an engineering firm, does a lot of work on infrastructure using climate data, and I believe they have several contracts with the City of Boston, Logan Airport (in fact, Logan and VHB hosted me on a tour of the airport’s infrastructure and facilities). VHB has a strong climate division, and they’re very friendly folks and if you ask nicely, they’ll send you some climate CDs and climate reports by mail.
And finally, check with MassPort Authority. You’ll run into roadblocks when calling them directly, so you should target specific people in the organization and be persistent. Nothing gets built in the harbor without MassPort’s blessing.
That’s all I got off the top of my head. Good luck and let me know how it goes!