On a Saturday in New York during summer, you can usually follow the gay crowd at Penn Station to get to the Pines. Generally train and ferry times coordinate, but check the schedule ahead of time to avoid wait time during transit.
Take the Long Island Railroad from Penn Station to Sayville. You may need to transfer trains in Jamaica Station or Babylon along the way. Ask one of the LIRR employees in Penn Station or on the train as they punch your ticket if you are unsure. They will be more than happy to guide you. Round trip ticket will be about $20, depending on peak and off-peak schedules. Buy before you board the train to save money.
When you arrive in the Sayville Station, there will be taxis waiting for you which offer a quick trip to the ferry for $4. The ferry is about 5-10 minutes from the train station. Though during summer, they are waiting to pick you up, if you ever need to call a cab in Sayville, the phone number is: 631-589-3500.
Make sure you get on the ferry that says: Fire Island Pines. You can catch a ferry for $14 roundtrip. Costs vary for children and pets; commuter packages are also available. For ferry fares and information, call 631-589-0810.
Total travel time from NYC to Fire Island Pines is approximately 2 - 2.5 hours.
click on the "more" button for ferry schedules and more information.