William and Mary has a marine science minor and includes the Virginia Institute of Marine Science (VIMS), which conducts a lot of research on the Chesapeake Bay, and I’m sure work beyond that. Undergrads take classes in marine science through VIMS. I’m not familiar with that particular program though. I second UNC-Wilmington as a public with a strong emphasis on marine science and a spectacular location on the southern NC coast. I consider William and Mary to be LGBT friendly. I’m not familiar with the culture at UNCW, just know someone who looked into it for marine science and checked it out.
http://www.vims.edu/about/index.php
You are from MA. If female, what about Smith? It has a lot of what you are looking for and is part of the five-school consortium with Amherst, Hampshire, Mount Holyoke, and U Mass-Amherst, which might expand opportunities, maybe for language studies and any marine studies offered through U Mass system.
If looking at CA schools, you might look through academic offerings at UCSD and UCSB (Santa Barbara).
I’ll also mention the University of Washington in Seattle. It’s just a very short commuter trip to downtown Seattle, which is right on the water with ferry service all over the region. The campus is very beautiful (have visited a couple of times). Seattle is a progressive city. It looks like it has strong programs in what you are looking for. Not specifically familiar with them.
https://www.washington.edu/students/gencat/academic/college_environment.html