Massachusetts
Here's how the next 5 days are shaping up at Nantasket Beach, Massachusetts. Each day is rated based on breaking wave height, swell period, and wind — updated hourly from the latest NOAA GFS run.
Sat, May 16: 4–5ft, 10s period, rated Good. Early morning is your best window — 5-6ft waves on E swell at 10s with calm winds. Onshore flow builds through the day to 12mph, bringing conditions down to good.
Sun, May 17: 1–2ft, 9s period, rated Poor. Get out early for the best of it — 2-3ft waves on E swell at 9s and moderate SW wind around 9mph. Onshore flow builds through the day to 15mph, bringing conditions down to poor.
Mon, May 18: 0–1ft, 8s period, rated Very Poor. Not the most exciting day — 0-1ft and very poor conditions with light winds out of the ESE. Expect the wind to bump up to around 13mph by PM.
Tue, May 19: 0–1ft, 3s period, rated Very Poor. A slow one — 0-1ft waves and very poor conditions with 10mph SW winds.
Wed, May 20: flat–flatft, 3s period, rated Very Poor. A slow one — Flat waves and very poor conditions with 11mph SW winds. Winds do pick up a bit by the afternoon to 18mph.
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Nantasket Beach is a sandy beach break located south of Boston that picks up consistent Atlantic swells, particularly during autumn and winter months. The sandy bottom provides a forgiving learning environment with generally mellow, rolling waves suitable for beginners and intermediate surfers. This accessible Massachusetts break offers a classic New England beach experience with decent swell direction alignment and relatively manageable conditions compared to more exposed coastal breaks.
Wave heights shown are breaking wave heights — the actual rideable wave size at this spot.
The current wave height at Nantasket Beach is 5-6ft with a 9.95s swell period. Wind is SW at 9mph and conditions are rated Very Good. The forecast updates hourly so you can plan your session around the cleanest windows.
The current breaking wave height at Nantasket Beach is 5-6ft, produced by a 2.8ft E primary swell at 10s, a 0.7ft WSW wind swell swell at 2s. 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 Nantasket Beach is Saturday from 9 AM to 12 PM with 5ft waves, a 9.95s swell period, and conditions rated Very Good. Check the hourly forecast for updates as conditions can shift.
Nantasket Beach works best with a NE swell and SW 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 Nantasket 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.
Nantasket Beach is a beach with a sand bottom, suited to beginner surfers. Nantasket Beach is a sandy beach break located south of Boston that picks up consistent Atlantic swells, particularly during autumn and winter months. The sandy bottom provides a forgiving learning environment with generally mellow, rolling waves suitable for beginners and intermediate surfers. This accessible Massachusetts break offers a classic New England beach experience with decent swell direction alignment and relatively manageable conditions compared to more exposed coastal breaks.
The prime season at Nantasket 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 Nantasket Beach include cold water temperatures, swimmers and beach crowds. Always check conditions before paddling out, respect local etiquette, and never surf alone if you're unfamiliar with the break.
Our Nantasket 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.
