Explore 417 dive and snorkel sites across Long Island. Water temperatures range from 12–33°C. Home to 12 marine species.
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Monthly water temperatures, visibility conditions, and seasonal highlights
Water temperatures in Long Island peak at 28°C in February and cool to 23°C in August. The warm waters make it comfortable to dive year-round, though a thin wetsuit is recommended in cooler months.
Highest-rated sites in Long Island
Notable species found across Long Island
Everything you need to know about diving and snorkelling in Long Island
Long Island has 417 dive and snorkel sites listed on Fin, including 303 scuba diving sites and 147 snorkelling sites. Sites range in depth from 1–1000m and cater to all skill levels from beginner to advanced.
Water temperatures in Long Island range from 12–33°C throughout the year. Visibility typically ranges from 1–100m.
Underwater visibility in Long Island typically ranges from 1–100m. Conditions vary by season and location — sheltered bays and deeper sites often offer the best clarity.
Long Island is home to 12 marine species recorded across its dive sites. The region's waters support a diverse range of marine life including reef fish, invertebrates, and pelagic species. Check individual dive site pages for detailed species lists and seasonal sighting information.
Yes, Long Island offers dive and snorkel sites for all experience levels. Many sites are rated for beginners with calm, shallow conditions. Use the skill level filter on Fin to find sites matched to your ability.
Browse all 417 dive and snorkel sites. Filter by skill level, depth, marine life, and more.
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Gobiidae spp.
16085 sites
