Ketewel
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Hourly Forecast
Timezone: Asia/Makassar
โฑ๏ธs.
โšก๏ธkJ
Wednesday 03
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Friday 05
Saturday 06
Sunday 07
Monday 08
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Ketewel surf guide

Ketewel is a surf spot located on the east coast, where the reefs switch to a lava base, making it a bit tricky for surfers. The break can be quite intimidating, especially since the waves unfold over an uneven reef. The set-up here is picturesque yet challenging, drawing in surfers who are looking for a thrill. The black sand beach adds a unique vibe to the area, and while it may not be the most consistent spot, it has its moments worth catching.

This place is best suited for experienced surfers due to the conditions. The optimal swell directions are south, with the spot also able to handle swells coming from the west. The waves typically break to the right over the uneven reef and can range from about 1 meter to 0.9 meters (3 ft). High tide is the best time to surf here, especially during morning sessions when the wind is preferred from the north. If you're skilled enough to challenge the waves, Ketewel can offer a rewarding surf experience, but it definitely requires real expertise to master.

While the reef conformation may offer some spacious and angular pits, there are also more manageable waves present around the black sand beach that can provide a more forgiving ride for those looking for something easier. It's a great spot for those who understand the ocean and can handle the conditions, but be prepared for the challenges it presents.

Surf reports and surf forecasts nearby Ketewel

Lebih
Unknown Region, Unknown Country
Reef break
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Keramas
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Reef break
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Purnama Beach
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Beach break
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Ketewel
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Reef break
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Padang Galak
Unknown Region, Unknown Country
Beach break
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Sanur
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Reef break
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Tanjung Sari
Unknown Region, Unknown Country
Reef break
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Hyatt Reef
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Reef break
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Serangan
Unknown Region, Unknown Country
Reef break
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Kuta Beach
Unknown Region, Unknown Country
Beach break
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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 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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