Polar Bear Swim
Watch the brave North Beach Polar Bear Club members as they take their annual plunge into the frigid Chesapeake waters. North Beach, Md. 1-3 p.m. 301-855-6681; www.ci.north-beach.md.us.
The galleries, shops and restaurants in Cambridge, Md., pull out all the stops for this monthly evening of fun. Downtown Cambridge, Md. 5-9 p.m. 443-477-0843; www.cambridgemainstreet.com.
The Maryland Watermen's Association will host its annual East Coast Commercial Fishermen's and Aquaculture Trade Exposition, marking the association's 40th anniversary The celebration will feature the Waterman of the Year competition, cook-offs, seminars, boat and fishing gear, workboats, exhibits, duck- and goose-calling competitions and lots more. Convention Center, Ocean City, Md. Call for times. 410-216-6610; www.marylandwatermen.com.
Polar Bear Plunge
Raise money for Maryland Special Olympics by jumping in the icy waters of the Bay. In addition to several rounds of plunging, there will be plenty of food and entertainment. Sandy Point State Park, Annapolis. 8 a.m.-4 p.m., plunges at 1 and 3 p.m. 410-789-6677; www.plungemd.com.