Bull Island
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Hourly Forecast
Timezone: America/New_York
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Saturday 13
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Bull Island surf guide

Bull Island is a unique wilderness spot that's only accessible by boat from Awendaw. You’ll need to take a hike across the island to get to the beachfront. This seven-mile-long island is well exposed to all swells, especially from the south and east, so you can usually expect to surf alone here. Keep in mind that there’s no camping allowed on the island.

When it comes to surfing, the beachbreak in front of the main trail can handle swell sizes from 3 to 6 feet (about 1 to 2 meters) on any given day. The waves are pretty scattered, breaking both left and right, which makes it fun for surfers of all skill levels—beginners, intermediates, and experts will all find something to ride. It works best on a low to mid tide, and you’ll want to be mindful of winds coming from the west or northwest for the best conditions. If you’re lucky enough to be here on a hurricane swell, get ready for some impressive size that’s likely bigger than most spots in the state.

Accessing Bull Island can be tricky since it’s only reachable by boat, so plan ahead. It’s generally not crowded at all, so you won’t have to worry about sharing waves. Just remember, the currents can get strong near the inlets, especially if the winds are blowing hard from the northeast or southwest, so keep an eye on conditions. The environment is usually pretty clean, although it can be cloudy most of the time. Just be aware that the waters can be sharkier than average, so it’s wise to stay cautious out there.

Surf reports and surf forecasts nearby Bull Island

South Island
Unknown Region, Unknown Country
Beach break
Sat 13
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Mon 15
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Cape Romain
South Carolina, United States
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Bull Island
South Carolina, United States
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
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Sun 21
Mon 22
Tue 23
Wed 24
Dewees Island
South Carolina, United States
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Wild Dunes
South Carolina, United States
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Isle of Palms Pier
South Carolina, United States
Unknown break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Bert's Bar
South Carolina, United States
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
The Washout
South Carolina, United States
Unknown break
Sat 13
Sun 14
Mon 15
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Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
10th Street
South Carolina, United States
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Folly Beach Pier
South Carolina, United States
Unknown break
Sat 13
Sun 14
Mon 15
Tue 16
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Sun 21
Mon 22
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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.

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.

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