New York
Here's how the next 5 days are shaping up at Mastic Beach, New York. Each day is rated based on breaking wave height, swell period, and wind — updated hourly from the latest NOAA GFS run.
Sat, May 16: 3–4ft, 10s period, rated Poor - Fair. First light looks cleanest — 4-5ft on SE swell at 9s with barely a breath of wind. The SSW wind kicks in by afternoon — 16mph and poor by then.
Sun, May 17: 3–4ft, 8s period, rated Poor - Fair. Get out early for the best of it — 3-4ft waves on S swell at 6s and light winds out of the WSW. Onshore flow builds through the day to 10mph, bringing conditions down to poor - fair.
Mon, May 18: 3–4ft, 8s period, rated Fair. Early morning is your best window — 3-4ft waves on S swell at 8s with moderate ENE wind around 10mph. Conditions go downhill through the afternoon.
Tue, May 19: 2–3ft, 8s period, rated Poor - Fair. First light looks cleanest — 2-3ft on SE swell at 9s with 10mph SW winds. Wind fills in through the day, pushing up to 14mph from the SSW and dropping conditions to poor.
Wed, May 20: 3–4ft, 6s period, rated Poor. Dawn patrol is the move — 3-4ft on SE swell at 13s with moderate SW wind around 12mph. Things get a bit scrappier as the day goes on.
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Mastic Beach is a sandy beach break on Long Island's South Shore that picks up swell from northeastern and northwesterly directions, making it a reliable option during autumn swells and nor'easters. The beach offers forgiving sand bottom conditions ideal for progression, with mellow rolling waves that peel across the sandy seafloor. Located in a quieter residential area, this spot provides a more relaxed atmosphere compared to the busier Atlantic-facing beaches in the region.
Wave heights shown are breaking wave heights — the actual rideable wave size at this spot.
The current wave height at Mastic Beach is 4-5ft with a 9.35s swell period. Wind is SW at 5mph and conditions are rated Fair. The forecast updates hourly so you can plan your session around the cleanest windows.
The current breaking wave height at Mastic Beach is 4-5ft, produced by a 3.1ft ESE primary swell at 10s, a 1.8ft SSE secondary swell at 8s. Breaking wave height is the actual rideable wave size at the shore — calculated from offshore swell data using this spot's coastal bathymetry — not the raw buoy reading.
Based on the current 5-day forecast, the best window to surf Mastic Beach is Sunday from 6 AM to 9 AM with 4ft waves, a 6.25s swell period, and conditions rated Fair - Good. Check the hourly forecast for updates as conditions can shift.
Mastic Beach works best with a SSE swell and NNW winds. Offshore winds groom the face of the wave, while onshore winds turn it sloppy. Cross-offshore conditions usually produce the cleanest shape.
Tide plays a big role at Mastic Beach. Mid tide works for most beach breaks, while reef and point breaks often prefer higher or lower stages. Use the tide chart above to line up your session with the swell peak.
Mastic Beach is a beach with a sand bottom, suited to beginner surfers. Mastic Beach is a sandy beach break on Long Island's South Shore that picks up swell from northeastern and northwesterly directions, making it a reliable option during autumn swells and nor'easters. The beach offers forgiving sand bottom conditions ideal for progression, with mellow rolling waves that peel across the sandy seafloor. Located in a quieter residential area, this spot provides a more relaxed atmosphere compared to the busier Atlantic-facing beaches in the region.
The prime season at Mastic Beach is fall, when swell direction, wind patterns, and water temps line up most consistently. Outside the peak season you can still score, but you'll need to watch the forecast closely for the right windows.
Common hazards at Mastic Beach include strong currents, occasional sharp shells. Always check conditions before paddling out, respect local etiquette, and never surf alone if you're unfamiliar with the break.
Our Mastic Beach forecast uses NOAA GFS and other weather models combined with spot-specific bathymetry to calculate breaking wave heights. Short-range (1-3 day) forecasts are most reliable. Extended forecasts show general trends. See the forecast accuracy card above for per-spot and regional performance metrics.
