Olowalu
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Hourly Forecast
Timezone: Pacific/Honolulu
โฑ๏ธs.
โšก๏ธkJ
Friday 29
Saturday 30
Sunday 31
Monday 01
Tuesday 02
Wednesday 03
Tap a forecast cell to explore conditions on the map.
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Olowalu surf guide

Olowalu is a surf spot located about six miles south of Lahaina Harbor. This spot features a jetty spit and offers a fun left during the summer months when the SSW-SW swells make their way through the channels between Lana'i and Kaho'olawe. Besides the left, there are also some right and left peaks nearby, keeping options open for different wave preferences. Generally, it's an easy access spot right off the road.

The surf here handles swell sizes from about 4 feet (1.2 meters) to 7 feet (2.1 meters), making it suitable for various levels of surfers from beginners to experts. The waves break over a reef bottom, with the primary wave types being reef breaks. The best swell directions are SSW, SW, and WSW, while the ideal wind comes from the North to ENE. For tide, low to mid and mid to high are usually the best options. Expect the size to range up to about chest high and even up to 2x overhead at times. When the conditions are right, this spot can be a lot of fun.

While the crowd factor can vary from light to moderate based on the day's surf quality and the day of the week, it's generally a mellow scene. Just be sure to be respectful to others out in the water. The environment here is pristine, though be mindful of the reef, as it can be a hazard. Whether you choose a shortboard, funboard, longboard, fish, bodyboard, or even a kiteboard, there's potential for a solid session at Olowalu, especially during spring, summer, and autumn.

Surf reports and surf forecasts nearby Olowalu

Waiehu
Hawaii, United States
Reef break
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
Ma'alaea Harbor
Hawaii, United States
Jetty break, Reef break, Point break
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
Ma'alaea Bay
Hawaii, United States
Reef break
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
Rainbows
Hawaii, United States
Reef break
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
Olowalu
Hawaii, United States
Reef break
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
Mala Wharf
Hawaii, United States
Reef break
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
Lahaina Harbour
Hawaii, United States
Reef break
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
Lahaina Breakwall
Hawaii, United States
Reef break
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
Shark Pit
Hawaii, United States
Reef break
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9
Lopa Beach
Hawaii, United States
Reef break
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Tue 9

Readme

Welcome! If youโ€™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:

๐Ÿ”ฎ 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.

๐Ÿ’จ Wind section

The first row on the table (with the ๐Ÿ’จ icon) shows wind speed, direction and gust. The more the wind speed the more aggressive the color (from blue, green, orange to red).

๐ŸŒŠ 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.

๐ŸŒ’ 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 โ€” handy when arrows overlap.

Forecast Cheat Sheet

Short on time? Focus on wave energy. Itโ€™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. Hereโ€™s the scale:

Perfect
Good
Average
Bad or No Data

Session logs also feed the algorithm โ€” 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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