Sea Island
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Hourly Forecast
Timezone: America/New_York
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Sea Island surf guide

Sea Island is a privately owned island, and this means access is pretty limited. It’s a unique spot thanks to the large amount of offshore sand that helps to shade it from south-southeast swells. You can catch some action here during strong northeast windswells, but don’t expect it to be worth a dedicated trip. The waves tend to be best around incoming to high tide.

The surf here can range from knee-high to head-high (about 1 meter to 2 meters). It handles swell sizes from 3 ft to 6 ft (around 0.9 to 1.8 meters) and picks up northeast, east-northeast, east, and southeast swells pretty well. You’ll find both right and left waves breaking over a sandy bottom, though watch out for some rip rap rocks that might be lurking in the lineup. The preferred wind directions are from the north, west-southwest, west, and northwest, making it ideal for the right conditions. This spot is suitable for surfers of all levels, including beginners, intermediates, and experts, and you can ride shortboards, funboards, longboards, fish, or even a SUP.

Parking is pretty limited, so plan accordingly. The crowd factor shouldn’t be a problem since it's not a major surf destination. Keep in mind that strong northeast and southwest winds can create strong currents, but on a good day, it can offer a fun little wave. The best time to surf is generally in the late summer, early fall, and early spring seasons. Just be aware of the strong currents and the occasional sea creatures in the water.

Surf reports and surf forecasts nearby Sea Island

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Sea Island
Georgia, United States
Beach break
Wed 3
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Beach break
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
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Fri 12
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5th Street/7th Street
Georgia, United States
Beach break
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
Wed 10
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Fri 12
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Sun 14
Jekyll Island
Georgia, United States
Beach break
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
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Fri 12
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Comfort Inn/Jeckyll Island
Georgia, United States
Beach break
Wed 3
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"Great Forecasts. Nothing more, nothing less."

Readme

Welcome! If you’re new to surf forecasting, check out this quick guide.

Forecast Table

The forecast table (the section on the page with all the numbers) is designed to pack as much information in the screen as possible. Although intimidating at first, it will help you make informed decisions about the waves faster, trust me :D. The table consists of roughly four sections, time and predictions, wind, waves, and tides:

🔮 Time and predictions section

Here we show the forecast thour and the overall surf quality prediction. This is determined based on the wave, wind and tide quality prediction. These individual predictions can be found on the forecast map.

💨 Wind section

The first row on the table (with the 💨 icon) shows wind speed, direction and gust. The more the wind speed the more aggressive the color (from blue, green, orange to red).

🌊 Wave section

The waves section consists of three rows, one for wave height and direction, one for period and one for wave energy. Our algorithm choices the "dominant wave". This is normally the first swell partition, but with heavy local storms it displays the wind waves. If that's the case, we display the numbers in italic and in gray.

🌒 Tide section

The tide section consists of a row with the actual heights per hour (measured at the half hour) and a table that displays the flow of the tide and the extremes (lows and highs).

Forecast map

The forecast map consists of arrows. These arrows represent all wave partitions (swell partitions and wind wave partition) and the wind. This allows you to see things like: a secondary swell or wind waves messes up the surf, or the wind is just a tick offshore so very surfable. Click a metric label in the bottom left to bring that arrow to the front — handy when arrows overlap.

Forecast Cheat Sheet

Short on time? Focus on wave energy. It’s the best single metric to gauge how big and powerful the waves will be.

Click any table cell to jump to that forecast hour. The map will update with forecast arrows, so you can see if wind and swell direction are lining up.

Use the table sidebar to switch units for height and speed.

Log your surf sessions to compare forecasts with real sessions and sharpen future predictions.

Models and Updates

Surfnerd blends multiple global and local wind and swell models using advanced interpolation and spatial techniques to create an "ensemble" forecast. Forecasts are refreshed hourly.

Surf Predictions

Our AI-driven algorithm scores surf quality, shown by green, orange, and gray dots. Each forecast hour is rated for wind, swell, and tide quality, then combined into an overall score. Here’s the scale:

Perfect
Good
Average
Bad or No Data

Session logs also feed the algorithm — the more you log, the smarter your forecasts get.

With Surfnerd, no more "you should have been here yesterday"

Wind certainty

Wind certainty tells you how much the weather models agree on the forecast.

  • High certainty: Models agree closely; forecast is reliable.
  • Medium certainty: Some disagreement; conditions may shift slightly.
  • Low certainty: Models diverge; treat forecast with caution.

We calculate this by comparing wind speed, gust and direction from multiple models (like GFS, ECMWF, Arome, and Harmonie) and seeing how closely they match. They are weighted, meaning that some models count more than others, depending on how good they are for a certain spot.

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