Visit Us

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)

1:00 PM - 5:00 PM
1:00 PM - 5:00 PM
Regular Hours Admissions

$5 per person

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)

$5 $0
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

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.

The Long Island Explorium recommends that all visitors over the age of 24 months wear a mask over their nose and mouth during their visit. Since children under the age of 5 are ineligible for vaccinations, we are making this recommendation to protect them.

Keeping children safe is one of our primary responsibilities, and we take it seriously. We know that you are supportive of our efforts to keep our children, guests, and staff safe as we welcome our community through our doors again.

We want to thank you all for your support during these challenging times. We are moving forward with optimism and excitement as we reset the Explorium with exhibits and programming for all ages.

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.

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.
  • Discount available for members only,  use code: Members2021

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.

Reopening Plan


The Long Island Explorium was closed in March 2020 to comply with New York State's efforts to flatten the curve and keep our communities safe. We had continued to inspire and provide enriching virtual STEM programming and activities to our community during our closure.  We are a much reduced staff, working to reimagine the Explorium's future. We are beginning to re-open our doors and your support will allow us to reopen even stronger... prepared to connect and rebuild through imagination, design and innovation.

We at the Long Island Explorium are grateful for all our generous donors whose support allows us 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.

Reopening with Your Safety in Mind

The Explorium will utilize guidance from the Center for Disease Control and Prevention (CDC), World Health Organization (WHO), and New York State to create, implement, monitor, and revise its reopening plan with a focus on:

  • Recommendation for all visitors over the age of 24 months to wear a mask over their nose and mouth during their visit. 
  • Maintaining recommended social distancing protocol.
  • Providing ample facilities for handwashing and the use of sanitizer with an alcohol content of at least 60 percent.
  • Minimizing points of contact that include recurrent handling of objects or touching of surfaces by multiple people and increasing the frequency of cleaning and disinfecting of objects and surfaces that are subject to repeated contact.
  • Establishing safety precautions meeting New York State guidance for reopening.

For more details on our reopening plan, please click here.

For more details on our enhanced cleaning measures, please click here.

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. Remember - no food or drinks allowed in the Explorium.
  5. Come ready to enjoy and experience our well-loved exhibits and activities.

The Long Island Explorium follows guidelines and recommendations from state and county health departments. We expect to adapt, change, or ease these policies as the health conditions change.

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.

2022 Maker Faire Long Island, June

Save the Date for next year's annual Long Island Makers Faire 2022, June 11, 2022


Explorium Express – Elf Workshops – Dec. 17th

Dec 17, 2022 1:00PM—2:30PM

Long Island Explorium 101 East Broadway Port Jefferson, NY 11777

Explorium Express – Elf Workshops – Dec. 10th

Dec 10, 2022 1:00PM—2:30PM

Long Island Explorium 101 East Broadway Port Jefferson, NY 11777

Open Play Hours – December 10

Dec 10, 2022 1:00PM—5:00PM

Open Play Hours – December 11

Dec 11, 2022 1:00PM—5:00PM