Visit Us Birthday Parties Events

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.


Fall Schedule

The museum is now also open Wednesdays 10 AM - 2 PM, starting September 4th

Saturday - 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!


Long Island Explorium has an abundance of maritime experiences for little explorers


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

Birthday Parties

Long Island Explorium has exciting and interactive Birthday Party Packages available.


Rain Garden Official Ribbon Cutting Ceremony

Jun 06, 2020 12:00AM—11:59PM

Long Island Explorium Saturday, June 6th,   TBD - Garden tours of the Village Center Rain Garden and official Ribbon Cutting Ceremony TBD pm - At the Long Island Explorium

Registration for XXIII Math Kangaroo Competition in USA

Dec 15, 2019 ALL DAY

Sunday, December 15th Registration Ends Sunday, Dec 15th, 2019 for XXIII Math Kangaroo Competition in USA and the Long Island Explorium is a center you can take the test!

Membership Drive Raffle Promotion

Nov 22, 2019 12:00AM—Dec 14, 2019 11:59PM

We are raffling off this Melissa & Doug Giraffe with *All NEW memberships between Thanksgiving and Saturday, December 14th.

The Science of Snow

Dec 14, 2019 1:00PM—5:00PM

Saturday & Sunday, December 14th & 15th from 1 – 5pm Did you know that there are seven different snow crystal types? Come in and explore these and more snowflake science