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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.

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.

We are excited to reopen our doors to our guests beginning Saturday, August 15th. We have worked diligently to adapt and transform our exhibits in this time of enhanced safety and health considerations. 

We hope that 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.

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:

  • Mandating the use of appropriate Personal Protective Equipment (PPE) by all guests and all staff.
  • 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.

The Explorium’s  re-opening plan is structured in several stages spaced a MINIMUM of two weeks apart to mirror the state and federal reopening plans and coincide with one incubation period for the virus. The Explorium will re-open with Stage 1 ( beginning August 15th) restricted only to members. This provides for a tightly managed, controlled environment that allows for constant monitoring and evaluation of the effectiveness of the plan along with the ability to identify and remedy shortcomings promptly.

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

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

Quick Guide: What to Know Before You Go


  • Reservations are required for private group sessions. Book online.
  • If you are not feeling well, please stay home.
  • Face masks are required for all medically able guests over age 2.
  • Physical distancing measures will be implemented.
  • Private Session is not a drop off program. Adult from your group must be present.  
  • Book your requested date 2 days in advance.
  • Food is not allowed in the museum.
  • Enhanced sanitation measures have been added.
  • Discount available for members only,  use code: Members2020

What we ask our visitors to do...

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.

All visitors must complete the screening. Please follow the link via the button to complete the COVID-19 Screening. All visitors must submit a completed COVID-19 Screening within 24 hours of visiting the Long Island Explorium

  • Stay home if you are not feeling well.
  • Visit our Events page and reserve your date
  • Wear a mask. This is required for any visitor over the age of 2. If you cannot wear a mask for health reasons, you are required to wear a face shield. 
  • 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.

Prepare for your visit...

  1. Print your event registration confirmation for your visit and bring it with you to the Explorium.
  2. Submit a completed COVID-19 Screening within 24 hours of visiting the Long Island Explorium: https://s-us.chkmkt.com/?e=204032&d=e&h=6CA95D60B0E22B0&l=en  
  3. Be sure to book 2 days in advance of any date you would like to allow for appropriate staffing.
  4. Pack a mask or an alternative face covering for yourself and all guests in your group.
  5. Limit your hand held belongings that you must bring into the Explorium.
  6. Remember - no food or drinks allowed in the Explorium.
  7. Come ready to enjoy and experience our well-loved exhibits and activities.

See all the Private Session dates

Private Sessions at the Explorium icon

Private Sessions at the Explorium

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.

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.

Exhibits

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!

Programs *New* Virtual

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.  We can customize any of our programs for your needs.

Birthday Parties *Paused*

During the first stage of our reopening plan, we will not be offering our well-loved birthday parties. Based on feedback and data received during the first stage, we look forward to resuming our birthday parties at an appropriate time in the future.

2020 Empire State Maker Faire, Oct 16th and 17th.

Discover what makers can do at the Empire State Maker Faire, an online event on October 16 and 17, 2020.  This statewide showcase, organized by local producers throughout New York State, including Maker Faire Long Island.

On Friday October 16th, Empire State Maker Faire offers a day for students to explore making in science, art and technology with hands-on activities that can be done at school or at home.

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

Phone

631-331-3277

Email

Info@LongIslandExplorium.Org