Rhode Island
Conditions stay similar this week — check the hourly forecast at Mansion Beach for the cleanest windows.
Here's how the next 5 days are shaping up at Mansion Beach, Rhode Island. Each day is rated based on breaking wave height, swell period, and wind — updated hourly from the latest NOAA GFS run.
Tue, Jun 30: 1–1ft, 9s period, rated Poor. A slow one — 1ft waves and poor conditions with barely a breath of wind. Expect the wind to bump up to around 15mph by PM.
Wed, Jul 1: 1–2ft, 6s period, rated Poor. Not the most exciting day — 1ft and poor conditions with 16mph SSW winds.
Thu, Jul 2: 2–2ft, 7s period, rated Poor - Fair. Not the most exciting day — 2-3ft and poor - fair conditions with 14mph out of the SW.
Fri, Jul 3: 2–2ft, 6s period, rated Poor - Fair. First light looks cleanest — 2ft on SSW swell at 6s with 7mph from the WNW. Onshore flow builds through the day to 13mph, bringing conditions down to poor.
Sat, Jul 4: 1–2ft, 5s period, rated Poor. Pretty quiet out there — 1-2ft and mostly poor with light W winds. Expect the wind to bump up to around 14mph by PM.
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.
Wave heights shown are breaking wave heights — the actual rideable wave size at this spot.
The current wave height at Mansion Beach is 1ft with a 8.85s swell period. Wind is SW at 12mph and conditions are rated Poor. The forecast updates hourly so you can plan your session around the cleanest windows.
The current breaking wave height at Mansion Beach is 1ft, produced by a 1.1ft SE primary swell at 9s, a 1ft S secondary swell at 6s, a 0.8ft SSW 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 Mansion Beach is Thursday from 6 AM to 9 AM with 2ft waves, a 6.7s swell period, and conditions rated Poor - Fair. Check the hourly forecast for updates as conditions can shift.
Mansion Beach works best with a S swell and WNW 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 Mansion 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.
Mansion Beach is a beach with a sand bottom, suited to intermediate surfers. 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.
The prime season at Mansion 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 Mansion Beach include strong currents, rip currents, ferry traffic nearby, rocks at edges of beach, remote location limits emergency access. Always check conditions before paddling out, respect local etiquette, and never surf alone if you're unfamiliar with the break.
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. Visit /public/accuracy for per-spot and regional performance metrics.
