Gilgo Beach is generally safe for swimming during summer months when lifeguards are on duty, typically late June through early September. Strong currents and rip tides can occur, so always swim near lifeguard stations and heed posted warnings. The beach is popular with surfers due to consistent waves, which can make conditions rougher than calmer bay beaches. Check daily conditions before visiting, especially in spring and fall when lifeguards aren't present. Avoid swimming alone and be aware that the beach's remote location means emergency services may take longer to arrive.

Summer (June–August) offers the warmest weather and full amenities, with lifeguards on duty and calmer ocean temperatures. However, Gilgo Beach shines in shoulder seasons—late spring and early fall provide fewer crowds, excellent surfing conditions, and stunning sunsets without the peak-season parking fees. Winter attracts hardy surf enthusiasts and beachcombers seeking solitude. Weekdays are significantly quieter than weekends year-round. For the best experience, visit on clear days when you can enjoy panoramic views of Fire Island and the Atlantic, and arrive early during summer to secure parking.

Gilgo Beach is located on Ocean Parkway on Long Island's South Shore, accessible by car via the Southern State Parkway or Meadowbrook State Parkway. Exit onto Ocean Parkway heading south; the beach entrance is clearly marked. A large parking lot accommodates visitors, with fees charged during peak season (typically Memorial Day through Labor Day). Parking is limited on summer weekends, so arrive early. Public transportation options are limited; the nearest LIRR stations (Babylon or Freeport) require a taxi or rideshare to reach the beach, approximately 20–30 minutes away.

Gilgo Beach has basic amenities including restrooms and outdoor showers, but food options are minimal. A small concession stand operates during summer, offering snacks and drinks, but selection is limited. It's best to pack your own food, water, and beach supplies. The nearest restaurants and shops are several miles away in Babylon or Lindenhurst. For overnight stays, accommodations are limited nearby; consider staying in Babylon, Bay Shore, or Long Beach, all within a 20–30 minute drive, which offer hotels, motels, and vacation rentals with better dining and shopping access.

Gilgo Beach is a favored surf spot on Long Island's South Shore due to its consistent wave action and less crowded lineups compared to nearby beaches. The barrier beach geography creates reliable swells, particularly during fall and winter nor'easters and hurricane season. The beach's eastern location catches more swell direction, producing quality waves for intermediate and advanced surfers. Surfing is permitted year-round, though specific areas may be designated surf-only zones during summer. Local surf shops in nearby towns provide board rentals and lessons. Water temperatures require wetsuits most of the year except mid-summer.