Swell Intel

Mansion Beach Surf Forecast, Rhode Island

Rhode Island

Block Island5-6ftBlack Rock Point5-6ftBreachway3-4+ft
Mansion Beach surf spot

Current Conditions

Poor
Wave Height
1-2+ft
knee to waist high
Swell Period
7.95s
Wind
20mph
SSW / Gusts 30mph
Conditions
Poor
Active Swells
Wind Swell
7.2ft @ 8sSSW

Nearest Webcam

Daily Forecast

3 of 5 days
Tue, Mar 312-3ft
Poor
6am9am12pm3pm
Wed, Apr 12-3ft
Poor - Fair

First light looks cleanest — 2-3ft on S swell at 8s with 23mph out of the SW. Conditions go downhill through the afternoon.

6am9am12pm3pm
9s S|14-23mph SW
Thu, Apr 22-3ft
Poor

Slim pickings today — 2-3ft and poor with strong NE wind at 19mph.

6am9am12pm3pm
7s S|19-20mph NE
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Sat

Forecast Charts

Mansion Beach Surf Spot Guide

Break
Beach
Bottom
Sand
Level
Intermediate
Crowd
Moderate
Best Swell
S
Best Wind
WNW
Season
Fall

Mansion Beach is a scenic stretch of shoreline on Block Island, Rhode Island, facing west-northwest into Block Island Sound and offering fun, punchy beach break when south swells wrap around the island's southern tip. The unique geography of Block Island means this spot picks up long-period S and SSW swells that refract around the coast, producing surprisingly consistent peaks with good shape for intermediate surfers. Its relative remoteness — requiring a ferry ride from the Rhode Island mainland — keeps crowds manageable and adds to the adventure of scoring it on the right day.

Strong currentsRip currentsFerry traffic nearbyRocks at edges of beachRemote location limits emergency access

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

Mansion Beach Surf Forecast FAQ

What is the current surf forecast for Mansion Beach?
The current wave height at Mansion Beach is 1-2+ft with a 7.95s swell period. Wind is SSW at 20mph. Conditions are rated Poor.
How accurate is the Mansion Beach surf forecast?
Our Mansion 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 Mansion Beach?
The current breaking wave height at Mansion Beach is 1-2+ft, produced by a 7.2ft SSW wind swell 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.
When is the best time to surf Mansion Beach?
Based on the current 5-day forecast, the best window to surf Mansion Beach is Wednesday from 6 AM to 9 AM with 2ft waves, a 8.65s swell period, and conditions rated Poor - Fair. Check the hourly forecast for updates as conditions can shift.