Kaiolohia Bay/Shipwreck Beach
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Hourly Forecast
Timezone: Pacific/Honolulu
⏱️s.
⚡️kJ
Wednesday 17
Thursday 18
Friday 19
Saturday 20
Sunday 21
Monday 22
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Kaiolohia Bay/Shipwreck Beach surf guide

Kaiolohia Bay, also known as Shipwreck Beach, is located on the north side of Lanai, about a half-hour's drive from Lanai City. This spot features an 8-mile stretch of coastline, offering a rugged and windswept scenery. The bay separates Lanai from Molokai through the shallow Kalohi Channel. Accessing the beach can be a bit tricky since it's only reachable via dirt roads, so a 4x4 is definitely needed to navigate the area. The spot is known for its diverse range of surfable reefs and waves that break around 500-600 yards from the shore.

The surf here is quite consistent throughout the year, primarily driven by ENE trade swells. It typically handles swell sizes from 4 to 7 feet (about 1.2 to 2.1 meters) and is particularly good during NE to ENE swells. Most waves break over reef, rock, and coral, producing both lefts and rights. While the waves can get good when the swell and winds line up, it’s important to note that that doesn’t happen all that often. Medium tides work best, and in the winter months, you can hope for calm or offshore winds that come from the south during frontal passages, making the conditions more favorable for surfers of all levels, from beginners to experts.

The crowd factor here is minimal, which is great for surfers looking for their space. With plenty of spots to choose from, you usually won’t have to worry about sharing the waves. The local vibe is generally laid-back, so just keep it cool while you’re out there. Be aware of the hazards too, like reefs and strong currents, as it is important to stay safe in the water.

Surf reports and surf forecasts nearby Kaiolohia Bay/Shipwreck Beach

S-Turns
Hawaii, United States
Reef break
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Rainbows
Hawaii, United States
Reef break
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mala Wharf
Hawaii, United States
Reef break
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Lahaina Harbour
Hawaii, United States
Reef break
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Lahaina Breakwall
Hawaii, United States
Reef break
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Shark Pit
Hawaii, United States
Reef break
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Lopa Beach
Hawaii, United States
Reef break
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Kaiolohia Bay/Shipwreck Beach
Hawaii, United States
Reef break, Offshore break
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Pohakuloa
Hawaii, United States
Reef break, Point break, Offshore break
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Manele Bay
Hawaii, United States
Reef break, Point break
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
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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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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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