Visit Us

Employment Opportunities

Current Hours & Admissions

Blue Star Museum & Museums for all Programs

Fall through Spring Hours are in effect.
Our hours during Saturday - Sunday from 1 pm - 5 pm. (Unless otherwise noted)

You can view our upcoming Calendar of Events on our Events Page:

1:00 PM - 5:00 PM
1:00 PM - 5:00 PM

In addition to our regular hours, we will be OPEN:

  • Spring Break: Monday, 4/22/24 - Friday, 4/26/24
  • Memorial Day: Monday, 5/27/24.
  • Juneteenth: Wednesday, 6/19/24.

Additional dates to be added

Regular Hours Admissions

Children: $6
Adults: $8

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

Blue Star Museum
Blue Star Museum

FREE for active-duty military personnel and their family members within the same household* (Proud to be a Blue Star Museum)

Museums for All

FREE for SNAP/EBT cardholders and family members within their household.
Talk to one of our staff to obtain an annual membership.

$60 $0

Become a Member

Join now and unlock endless fun and learning opportunities while supporting our nonprofit mission to inspire a love of learning in children. With discounts and members-only perks, our membership is the key to unlocking the full potential of our children's museum. Become a member today and make a difference in your community!


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

We hope you will enjoy visiting our little gem of a children's museum. We welcome your feedback and comments as we work towards ensuring that our guests have an enjoyable and safe experience.

Long Island Explorium Front of Building
Long Island Explorium Front of Building

Quick Guide: What to Know Before You Go

  • Masks are recommended but optional for all visitors during their visit.
  • If you are not feeling well, please stay home.
  • Enhanced sanitation measures have been added.
  • Reservations are required for private group sessions. Contact us for booking.  Private Session is not a drop-off program. An adult from your group must be present.  Book your requested date 4 days in advance.

We will always err on the side of safety and realize that ALL risk cannot be eliminated from visiting the Explorium. We have worked very hard to reopen and operate in a responsible manner and ask for your support in following the health and safety guidelines that we have implemented.

  • Stay home if you are not feeling well.
  • Visit our Events page and reserve your date
  • Masks are recommended but optional for all visitors during their visit.
  • Use the sanitizers provided at the START of your visit. 
  • Wash your hands often, for at least 20 seconds.
  • Avoid touching your eyes, nose, and mouth, and be sure to cough/sneeze into your elbow.
  • Please be patient – don’t crowd around exhibits. Practice social distancing and remain 6 feet away from others not in your party. 
  • Follow the signage throughout the Explorium.
  • Private Sessions are not drop-off programs, please have an adult present from your group's session.
  1. Print your event registration confirmation for your visit and bring it with you to the Explorium if you have a private event.
  2. Be sure to book 2 days in advance of any date you would like to allow for appropriate staffing.
  3. Limit your handheld belongings that you must bring into the Explorium.
  4. Come ready to enjoy and experience our well-loved exhibits and activities.

We at the Long Island Explorium are a nonprofit and are grateful for all our generous donors whose support allows us to continue to be mission-driven and committed to ensuring equal access to high-quality STEM programming to students of all needs and abilities.

Please consider making a gift that will make a difference.

Virtual Tour

VIRTUAL TOUR of the Long Island Explorium

Get a little sneak peek of the Explorium with our new 360 tour of the Long Island Explorium.

Contact Us

Mailing Address

Long Island Explorium
P.O. Box 465
Port Jefferson, NY 11777

Physical Address

At Port Jeff Harbor
101 East Broadway
Port Jefferson, NY 11777





Events and Exhibits

Field Trips - * New* VIRTUAL fieldtrips

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

Can't get to the Explorium, we'll bring the Explorium to you virtually! Call us to learn more.


Long Island Explorium has an abundance of enriching and impactful experiences for explorers from birth to 6th grade and beyond. There's never a dull moment for any of our visitors!


Long Island Explorium has a variety of programs for families, students, educators, and other explorers. We have been successful in pivoting to an online platform during this pandemic as well.  We can customize any of our programs for your needs.

Birthday Parties

We are thrilled to announce that birthday parties are once again available at the Explorium. The Explorium will be offering both indoor and outdoor styled birthday parties.⠀

Visit our parties page to start your booking.

2024 Maker Faire Long Island, June

Save the Date for next year's annual Long Island Makers Faire 2022, June 8, 2024


Maker Faire Long Island, June 8th, 2024

Jun 08, 2024 10:00AM—5:00PM

Port Jefferson Harborfront

Summer Camps 2024

Jul 15, 2024 9:00AM—Aug 30, 2024 12:00PM

Spring Break Maker Camp 2024

Apr 22, 2024 9:00AM—Apr 26, 2024 12:00PM

2024 Solar Eclipse at the Long Island Explorium

Apr 08, 2024 1:00PM—5:00PM