Sereweh
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Hourly Forecast
Timezone: Asia/Makassar
⏱️s.
⚡️kJ
Wednesday 03
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Sereweh surf guide

Sereweh is located on the exposed southeastern tip of Lombok and can be a decent surf spot when conditions align. Accessing Sereweh is not the simplest; it requires a long boat ride, especially if it's not the right season. If you’re looking to hit some waves here, it's best to plan around the wet season when small Southeast swells and North winds come into play.

The waves at Sereweh are mainly right-hand reef breaks that handle swell sizes starting from around 2 feet (0.6 meters) and up. Ideal conditions happen with a South swell direction, but it can also work with Southeast and Southwest swells. The spot is usually best when the tide is either low, mid, or high, making it versatile depending on the day's conditions. However, it’s worth noting that this spot is suited for expert surfers due to the tricky reef and changing nature of the waves.

While Sereweh can produce some fun performance ramps, especially when the conditions are right, it’s crucial to keep an eye on the swell. If you don't see any whitewash on the reefs, Lombok is likely flat and not worth the hassle. Just remember that if you're heading to Sereweh, it's mostly about timing and knowing when to make the long trek.

Surf reports and surf forecasts nearby Sereweh

Labuhan Haji
Unknown Region, Unknown Country
Reef break
Wed 3
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Inside Ekas
Unknown Region, Unknown Country
Reef break
Wed 3
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Sereweh
Unknown Region, Unknown Country
Reef break
Wed 3
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Outside Ekas
Unknown Region, Unknown Country
Reef break
Wed 3
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Awang
Unknown Region, Unknown Country
Reef break
Wed 3
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Inside Grupuk
Unknown Region, Unknown Country
Reef break
Wed 3
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Don-Don
Unknown Region, Unknown Country
Reef break
Wed 3
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Tanjung A'an
Unknown Region, Unknown Country
Reef break
Wed 3
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Outside Grupuk
Unknown Region, Unknown Country
Reef break
Wed 3
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Segar
Unknown Region, Unknown Country
Beach break
Wed 3
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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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