April 25, 2026 | Portland, ME
A free, one-day expo of seaweed food, art, and fun on the Portland waterfront!
Join us Saturday, April 25th, from 11am to 4pm at the Gulf of Maine Research Institute for a can't miss seaweed celebration with friends, family, and farmers! Explore our seaweed marketplace, try delicious seaweed samples, get inspired by local seaweed artists, and learn directly from Maine's seaweed experts in one of our community panels. Seaweed Saturday is hosted in partnership with the Maine Seaweed Council.
Event details
Date & Time: April 25, 2025, 11 am to 4 pm
Location: Gulf of Maine Research Institute, 350 Commercial St, Portland, ME (Map)
Admission: Free. No ticket required. All ages.
Panels: Register to attend a free community panel. Registration opens soon.
Event Space and Venue
Gulf of Maine Research Institute
350 Commercial St, Portland, ME 04101
GMRI is a nonprofit organization based in Portland, Maine, focused on marine science, sustainable seafood, and ocean stewardship. This Seaweed Saturday, join us at GMRI’s state-of-the-art waterfront facility in downtown Portland and learn more about ongoing research and initiatives.
What to expect in 2026...
Vendor Marketplace
Find everything from seaweed soaps to kelp pizza crust! Explore our one-day, one-of-a-kind marketplace featuring over 40 Maine seaweed businesses, farms, artists, and innovators, offering delicious and sustainable seaweed products to sample or take home.
Hands-On Demos
Join us for hands-on demos and activities throughout the day, including:
- Cooking demos from Maine chefs and farmers
- Ocean-inspired kids activities with Maine's marine education experts
- Touch tanks and live samples for seaweed ID and hands-on demos
Seaweed Panels
Join us in GMRI's beautiful Cohen Center for seaweed-focused panel discussions throughout the day. Hear from experts about seaweeds role in climate action, global ocean systems, and Maines working waterfronts.
Panels are free to attend, but space will be limited. Online pre-registration for each panel opens soon.
Food Trucks & More
Stop in for lunch or a snack at one of the on-site food trucks serving up seaweed-inspired takes on lobster rolls, oyster pairings, dumplings, ramen and more.
On the lawn outside, you'll also find picnic tables and our activities tent with additional exhibitors and touch tanks.
Event FAQs
2025 Hosts & Sponsors
