Swell Intel

Coskata Beach Surf Forecast, Massachusetts

Massachusetts

Madaquecham5-6+ftNobadeer5-6+ftNantucket9-10ft
Coskata Beach surf spot

Current Conditions

Poor - Fair
Wave Height
6-7+ft
overhead
Swell Period
8.6s
Wind
16mph
SSW / Gusts 28mph
Conditions
Poor - Fair
Active Swells
Wind Swell
6.5ft @ 9sSSW

Nearest Webcam

Daily Forecast

3 of 5 days
Tue, Mar 315-6ft
Poor - Fair

Not the most exciting day — 5-6ft and poor - fair conditions with 19mph out of the SSW.

6am9am12pm3pm
8s SSW|19mph SSW
Wed, Apr 17-8ft
Poor - Fair

Pretty quiet out there — 6-7ft and mostly poor - fair with 18mph out of the SW.

6am9am12pm3pm
9s SSW|18-20mph SSW
Thu, Apr 21-2ft
Poor

Pretty quiet out there — 0-1ft and mostly poor with 19mph NE winds.

6am9am12pm3pm
8s S|19-21mph ENE
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Sat

Forecast Charts

Coskata Beach Surf Spot Guide

Break
Beach
Bottom
Sand
Level
Intermediate
Crowd
Light
Best Swell
E
Best Wind
W
Season
Fall

Coskata Beach is a remote and wild stretch of coastline on the northeastern tip of Nantucket Island in Massachusetts, offering uncrowded waves shaped by Atlantic swells funneling through Nantucket Sound and the open ocean. The beach faces southeast toward the open Atlantic, picking up solid groundswells from late-season hurricanes and nor'easters that produce punchy, sandbars-driven beach break with both left and right options. Its extreme remoteness — accessible only by 4WD or boat — keeps crowds minimal and rewards adventurous surfers willing to make the trek.

Strong currentsRip currentsRemote locationCold waterSharksShifting sandbarsLimited access

Wave heights shown are breaking wave heights — the actual rideable wave size at this spot.

Coskata Beach Surf Forecast FAQ

What is the current surf forecast for Coskata Beach?
The current wave height at Coskata Beach is 6-7+ft with a 8.6s swell period. Wind is SSW at 16mph. Conditions are rated Poor - Fair.
How accurate is the Coskata Beach surf forecast?
Our Coskata 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.
What is the breaking wave height at Coskata Beach?
The current breaking wave height at Coskata Beach is 6-7+ft, produced by a 6.5ft SSW wind swell swell at 9s. 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.
When is the best time to surf Coskata Beach?
Based on the current 5-day forecast, the best window to surf Coskata Beach is Wednesday from 5 PM to 8 PM with 6ft waves, a 8.85s swell period, and conditions rated Fair - Good. Check the hourly forecast for updates as conditions can shift.