Silabu
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Hourly Forecast
Timezone: Asia/Jakarta
⏱️s.
⚡️kJ
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Silabu surf guide

Silabu is located on the northern half of Pulau Pagai Utara (North Pagai Island). It's not the most famous surf spot in the area, but it does have some interesting options for surfers looking to explore. The vibe here is pretty laid-back, and while it’s not crowded like some other spots, it has its own charm and appeal, especially for those in search of a quieter session.

This spot offers a left-hander that works best with moderate south-west swells, hitting around head high. It can handle swells of about 4 ft. (1.2 m) and is known to be quite punchy. The wave breaks over live coral, providing a solid ride but don't expect it to be super long or hollow. It’s a good choice for intermediate surfers, as the conditions can vary throughout the tide, working well on low, mid, and high tides. The best wind for this spot is from the east, which sets up the waves nicely.

While the surf may not always be epic, Silabu does provide a decent escape from busier spots like Maccas. It can handle bigger swells too, so if you're keen on catching some waves without the hassle of crowds, this could be a good option. Just remember to be mindful of the reef while you’re out there, and enjoy the unique experience that Silabu has to offer.

Surf reports and surf forecasts nearby Silabu

Lance's Left
Unknown Region, Unknown Country
Reef break
Wed 3
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Silabu
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Reef break
Wed 3
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Macaronis
Unknown Region, Unknown Country
Reef break
Wed 3
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Macaronis Right
Unknown Region, Unknown Country
Reef break
Wed 3
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Greenbush
Unknown Region, Unknown Country
Reef break
Wed 3
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Roxys
Unknown Region, Unknown Country
Reef break
Wed 3
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Rag's Left
Unknown Region, Unknown Country
Reef break
Wed 3
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Rag's Right
Unknown Region, Unknown Country
Reef break
Wed 3
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Thunders
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Reef break
Wed 3
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Sibigau Rights
Unknown Region, Unknown Country
Reef break
Wed 3
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"Great Forecasts. Nothing more, nothing less."

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.

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

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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