Visit Us


The Long Island Explorium is housed in the beautiful historic Chandlery Building in Port Jefferson village.  The building was built in the 1890’s and served as the chandlery, a store that sold nautical gear, candles, rope, sail repair kits and all of the other equipment a ship would need for a long voyage.

Visitors to the Explorium will enjoy fun and interactive hands-on exhibits all aimed at fostering the understanding and love of STEM.


Saturday and Sunday

1:00pm - 5:00pm

(Other times by reservation)


$5 per person

Members and children under 1 are free
Port Jefferson Library card holders - $1 off each admission ticket

Field Trips

Hands-on Workshops for Young Scientists, Grades Pre-K to 6TH!


Maritime Explorium has an abundance of maritime experiences for little explorers


Maritime Explorium has a variety of programs for families, students, educators, and other explorers


March 3-4: Happy Birthday Dr. Seuss

In honor of Dr. Seuss's birthday, Join us to create your own Green Oobleck to ooze through your fingers!

March 10-11: March Math Madness

Join us as we explore and investigate through Art the Mathematical findings of PI, Fibonacci, and Bernoulli!

Celebrate International Pi day this weekend with our "Makers in Residence"

March 10, 2pm: Dr. Moira Chas from SBU Math Dept as she explores the world of curves, crossings, surfaces and more.

March 11, 2 pm: Dr. Elana Reiser and her fabulous 3D Printed Interactive Math Fun

March 17-18: Happy St. Patrick's Day

Come to our Maker space to design and create Leprechaun traps! See how many Simple Machines you incorporate.

March 24-25: Celebrate World Water Day

Join us as we design a Water Filtration System to clean dirty water!

We will have First Lego League teams showing off their 2018 Aqua Adventure Challenge or HydroDynamics challenge. We will see how their ideas conserve this valuable resource.

Book a Birthday Party

Children will enjoy 90 minutes of exciting, interactive activities.


  • Two teachers to facilitate activities
  • Activity materials
  • Invitations
  • Paper goods
  • Pizza and drink
  • Music
  • Guest pass for a future visit for every child

Dates and times by reservation
Call: 631-331-3277
Email: carole@MaritimeExplorium.Org

Price $250
Up to 10 children included in the price, each additional child is $15
Parents supply any additional food, cake or cupcakes, drinks and snacks