11 am – 6 pm 2025 Seafood Festival Ages: AllFamily Festivals Food & Drink Long Island Maritime MuseumWest Sayville
11 am – 12:30 pm The SpongeBob Musical: Youth Edition Ages: AllArt Family Theater The Gateway PlayhouseBellport
11 am – 2 pm Rubber Duckie Race on Reeves Bay Ages: AllFamily Free Fundraisers Flanders Men’s ClubFlanders
11 am – 2 pm Rubber Duck Race on Reeves Bay to Benefit Big Duck Ranch Ages: AllFamily Free Fundraisers Flanders Men’s ClubFlanders
Noon – 4 pm Heritage Country Fair Ages: AllAnimals Family Festivals The Smithtown Historical SocietySmithtown
Noon – 11 pm Island Park Greek Festival Ages: AllAttractions Family Festivals Panaghia of Island ParkIsland Park
Noon – 2 pm Back to School Bash: Supplies, Smiles, and Style Ages: AllFamily Free Green Acres MallValley Stream
1 – 11 pm Port Jefferson Greek Festival Ages: AllAttractions Family Festivals Greek Orthodox Church of the AssumptionPort Jefferson
2 – 11 pm 30th Annual Holbrook Chamber Carnival & Festival Ages: AllAttractions Family Festivals Holbrook Country ClubHolbrook
4 – 5:30 pm Kirtan: The Power of Mantras and Sacred Chants At Here and Now Yoga Ages: AllClasses Community Family Here and Now Yoga, Wellness & Arts CollectiveFloral Park
4 – 11 pm The 52nd Great Feast of Mother Cabrini Ages: AllFamily Food & Drink Free Suffolk County Community CollegeBrentwood
7 – 9:30 pm Sondheim’s Greatest Hits — Port Washington Play Troupe presents Broadway on Manhasset Bay under the Stars Ages: AllFamily Free Music John Philip Sousa Memorial Band Shell Sunset Park / Main Street Port Washington 11050Port Washington
All day Walt Whitman Birthplace Museum – Girl Scout Programs! Ages: 5 – 12Art Classes Family Walt Whitman BirthplaceHuntington Station
9 – 11 am The Sandlot Featuring Baseball Skills Challenge and Kids Crafts Ages: 5 – 8Family Film Sports Southampton PlayhouseSouthampton
10 – 11:30 am Sunday Science: Secret Life of Bugs Ages: 5 – 12Family Center for Science Teaching and Learning-Tanglewood PreserveRockville Center
10 am – noon Children’s Mythical Creature Watercolor Painting Ages: 5 – 12Art Classes Family The Reboli Center for Art and HistoryStony Brook
11 am – 4 pm The Wizard’s Quest Ages: 5 and upArt Attractions Family The Whaling Museum & Education CenterCold Spring Harbor
11 am – 4 pm Jaws-Some Scavenger Hunt Ages: 5 – 12Attractions Family The Whaling Museum & Education CenterCold Spring Harbor
11 am – 6 pm 2025 Seafood Festival Ages: AllFamily Festivals Food & Drink Long Island Maritime MuseumWest Sayville
11:45 am – 12:30 pm Prenatal & Postpartum Yoga Ages: 3 – 4Family Health & Fitness Here and Now Yoga, Wellness & Arts CollectiveFloral Park
Noon – 9 pm Island Park Greek Festival Ages: AllAttractions Family Festivals Panaghia of Island ParkIsland Park
Noon – 9 pm Port Jefferson Greek Festival Ages: AllAttractions Family Festivals Greek Orthodox Church of the AssumptionPort Jefferson
Today, noon Greenport Harbor Brewing Company Presents Contemporary Artist Gavin Zeigler Greenport Harbor Brewing Company’s Greenport Tasting Room