Sunday, Aug. 12, 3-6 p.m.: Lobster barbecue at Riverhead Elks Lodge, 1239 East Main St. Live music by Joe Hampton & the Kingpins, 50/50 raffle. Each dinner includes whole lobster, chicken, shrimp and sides, with wine, beer and soda. Tickets: $45; $30 without lobster. Register: 631-727-2027.
Saturday, Aug. 11, 7 p.m.: Perseid meteor shower presentation and observation at Custer Observatory, 1115 Main Bayview Rd., Southold. Bob Farrell will speak about hero and constellation Perseus and telescopes will be open to view the night sky before the meteor shower. Gather to watch the meteor shower on the south lawn. Bring lawn chairs, blanket, bug spray and snacks. Suggested donation: $5 adults; $3 children under 12. 631-765-2626, custerobservatory.org.
Saturday, Aug. 11, noon-4 p.m.: Ninth annual unity picnic to celebrate diversity sponsored by Southold Town Anti-Bias Task Force at Peconic Lane Community Center, 1170 Peconic Lane, Peconic. Hot dogs, hamburgers, beverages provided. Live music, games for kids, door prizes. Food served 12:30-3:30 p.m. Free.
9 a.m.: registration for Cardboard boat race at Peconic Riverfront, downtown Riverhead. Sponsored by Riverhead BID, this annual event brings people out to cheer on boats made by families, business owners and other community members. Awards for first, second and third place in a variety of categories. Rubber duck race hosted by the YMCA of East Hampton. Races begin at noon. Free. Information: Diane Tucci, email@example.com, 631-209-4244.
“Seussical” premieres at North Fork Community Theatre. Opening night reception, 7 p.m. with refreshments. Performances Thursdays, Fridays, Saturdays 8 p.m., Sundays 2:30 p.m., July 19-Aug. 5. Tickets $25 at door or online at brownpapertickets.com. $20 student rush tickets available 10 minutes before each performance, subject to availability. nfct.com.
7:30 p.m.: Marty Stromsten and Maintenance & Repair concert at Silversmith’s Corner, Main Road and Youngs Avenue, Southold. Rain moves concert to First Presbyterian Church, 53100 Main Road. Bring a lawn chair or blanket, picnic. Free; donations appreciated.
7:30 p.m.: Dances in the Park at Mitchell Park, Front Street, Greenport. Dance to Abrazos (Afro-Latino, salsa). Free. greenportvillage.com/event/dances-in-the-park.