Lopa Beach
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Hourly Forecast
Timezone: Pacific/Honolulu
⏱️s.
⚡️kJ
Wednesday 27
Thursday 28
Friday 29
Saturday 30
Sunday 31
Monday 01
Tap a forecast cell to explore conditions on the map.
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Lopa Beach surf guide

Lopa Beach is a long, white sand beach located on the east coast of Lanai. It's a bit remote, accessible only by rough 4X4-only roads branching off from Keomuku Road. This means you really need a sturdy vehicle to get there. The beach itself is generally pretty pristine, making it a nice spot to chill when the surf isn't pumping. Summer is the most consistent time for waves here, but you might catch some decent ones in winter if the north-northeast swells sneak in between Maui and Molokai.

The surf at Lopa Beach can get fun, especially with the right swell and wind conditions. It handles sizes from about 4 to 7 feet (1.2 to 2.1 meters), with the best action coming from S-SSE and NNE-NE swells. The breaks are mostly over reef and coral, offering both right and left waves. You can surf here year-round, but summer usually delivers better sessions. When the wind is calm or blowing offshore from the west or northwest—often during winter fronts—it's game on. Just keep in mind that onshore winds from the easterly trades are pretty common, which can mess up the waves.

The crowd situation at Lopa Beach can be hit or miss. When the conditions are prime, it might get a bit crowded, but more often than not, you can find some empty spots to enjoy. The vibe is generally mellow, so it’s a good place to relax and ride some waves. Beginners and intermediate surfers will find something to enjoy, while more experienced surfers can challenge themselves when the swell is up. Just remember to be respectful and keep it chill.

Surf reports and surf forecasts nearby Lopa Beach

S-Turns
Hawaii, United States
Reef break
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Rainbows
Hawaii, United States
Reef break
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Olowalu
Hawaii, United States
Reef break
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mala Wharf
Hawaii, United States
Reef break
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Lahaina Harbour
Hawaii, United States
Reef break
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Lahaina Breakwall
Hawaii, United States
Reef break
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Shark Pit
Hawaii, United States
Reef break
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Lopa Beach
Hawaii, United States
Reef break
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Kaiolohia Bay/Shipwreck Beach
Hawaii, United States
Reef break, Offshore break
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Manele Bay
Hawaii, United States
Reef break, Point break
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7

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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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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