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Surf forecast for Kahalu'u Bay

Tide
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Timezone:
Pacific/Honolulu
Forecast updated:
18/06, 14:00
Wind: SN UNITY Atmos
(20260619 00z)
Waves: SN UNITY WAVE
(20260619 00z)
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Kahalu'u Bay Surf Forecast Guide

Kahalu'u Bay is a popular surf spot located on the Big Island of Hawaii. It's known for its easy access and a variety of waves that cater to surfers of different skill levels. Located right next to Kahalu'u Beach Park, it's a place where you can catch some waves while enjoying the beautiful surroundings. It's often crowded with beginners, but you'll also find some intermediate surfers looking to have fun out there.

The surf here mostly rolls in with a mellow vibe, making it perfect for newbies. However, when solid south or southwest swells hit during spring and summer, the outer peak can offer fun lefts and rights, with wave sizes ranging from about waist to head high (1 to 2.5 meters). The bottom is primarily made up of reef, coral, and lava, which can be a little tricky if you're not careful. A good day usually features medium tides and clean conditions, especially in the morning before the afternoon seabreeze kicks in. You can expect to see waves handling sizes from about 4 to 8 feet (1.2 to 2.4 meters), so there's definitely something for everyone, whether you're on a shortboard, funboard, or longboard.

Paddling out is fairly easy on smaller days, but it gets a bit more challenging as the waves get bigger. Crowds can be a common sight at Kahalu'u, so keeping a friendly local vibe is key. Just remember to be respectful and watch out for other surfers and their boards, especially when the tide is low. Overall, this spot is a great choice for beginners most of the time, and on good swells, even intermediates can find some fun waves to ride.

Surf spots near Kahalu'u Bay

Honls
Hawaii, United States
Beach break
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Banyans
Hawaii, United States
Reef break
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Lymans
Hawaii, United States
Point break
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
La'aloa Beach Park
Hawaii, United States
Beach break
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Kahalu'u Bay
Hawaii, United States
Reef break
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23

Frequently asked questions

What are good surfing conditions for Kahalu'u Bay?

Kahalu'u Bay is usually best with south through west-southwest to west-northwest (S-WSW-WNW) swell around 1.2 m / 4 ft to 2.4 m / 8 ft, wind from north-northeast through east to south-southeast (NNE-E-SSE), with east (E) offshore, and any tide.

Where is the surf spot Kahalu'u Bay?

Kahalu'u Bay is a surf spot in Kahaluu-Keauhou, Hawaii, United States.

What is the surf break like at Kahalu'u Bay?

Kahalu'u Bay is a right-and-left reef break over lava, rock, and coral. Expect a busy crowd and a reserved lineup.

What season is best for surfing Kahalu'u Bay?

The main surf season at Kahalu'u Bay is spring, summer, autumn, and winter.

What surfing skill level is Kahalu'u Bay suitable for?

Kahalu'u Bay can suit beginner, intermediate, and expert surfers.

Is Kahalu'u Bay beginner friendly for surfing?

Yes. Kahalu'u Bay can suit beginner surfers when conditions are manageable.

What surfboards work at Kahalu'u Bay?

Shortboard, Funboard, Longboard, Fish, Bodyboard, and Sup are common choices at Kahalu'u Bay.

What surf spots are near Kahalu'u Bay?

Other nearby surf spots are La'aloa Beach Park, Lymans, Banyans, and Honls.

What swell direction works for surfing at Kahalu'u Bay?

Kahalu'u Bay can work with swell from south through west-southwest to west-northwest (S-WSW-WNW).

What swell size works for surfing at Kahalu'u Bay?

Kahalu'u Bay usually works with swell around 1.2 m / 4 ft to 2.4 m / 8 ft.

What wind direction is best for surfing at Kahalu'u Bay?

Kahalu'u Bay usually works with wind from north-northeast through east to south-southeast (NNE-E-SSE); east (E) is offshore.

What wind direction is offshore for surfing at Kahalu'u Bay?

East (E) is offshore at Kahalu'u Bay.

What tide works best for surfing at Kahalu'u Bay?

Kahalu'u Bay can work on all tides. A rising tide is usually better here.

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 chooses the "dominant wave" using spot-adjusted surf energy (depth + directional fit). This is usually the first swell partition, but during local storms it can switch to wind waves. If that happens, values are shown in gray and italic.

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.

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

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Confidence tells you how much the weather models agree on the forecast.

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We calculate the wind confidence by comparing wind speed, gust and direction from multiple models (like GFS, ECMWF, Arome, and Harmonie) and seeing how closely they match. For wave certainty we compare height, period and direction, also on multiple models. They are weighted, meaning that some models count more than others, depending on how good they are for a certain spot.