Arenillas Negras
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Hourly Forecast
Timezone: America/Santiago
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โšก๏ธkJ
Sunday 14
Monday 15
Tuesday 16
Wednesday 17
Thursday 18
Friday 19
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Arenillas Negras surf guide

Arenillas Negras is a wider exposed beachbreak that offers a mix of fun for surfers of varying skill levels. The beach is scattered with rocks, and conditions can change, so it's essential to keep an eye on the surf. The spot generally provides some mellow rides, especially suited for beginners, but it's not the most consistent location. Nearby is a bodyboarding hotspot called El Rancio known for its intense righthand slabs when the swell hits just right.

The optimal swell direction for Arenillas Negras is from the SouthWest, but itโ€™s also able to handle swells coming from the South and NorthWest. The beach tends to break over sand, which makes it a bit kinder to those just starting out. When conditions are on, you can catch waves ranging from 3 feet (about 0.9 meters) to bigger sizes, although most rides tend to be short mid-tide slides. The wave direction varies, so you can find both lefts and rights. For the best experience, stick to a mid-tide with NorthEast winds.

Even though it's a beginner-friendly location, it's a good idea to be mindful of the waves and the configurations, particularly when you venture close to those rockier sections. Always be prepared for changing conditions and know your limits out there. If you find the main break a bit crowded or not to your taste, check out El Rancio for a different experience, especially if you're into bodyboarding.

Surf reports and surf forecasts nearby Arenillas Negras

Playa Chinchorro
Arica Y Parinacota, Chile
Beach break
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
La Puntilla (Arica)
Arica Y Parinacota, Chile
Rivermouth break
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
El Puerto
Arica Y Parinacota, Chile
Reef break
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
El Brazo
Arica Y Parinacota, Chile
Reef break
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
La Isla
Arica Y Parinacota, Chile
Reef break
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
El Tojo Viejo
Arica Y Parinacota, Chile
Reef break
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
El Gringo
Arica Y Parinacota, Chile
Reef break
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
El Buey
Arica Y Parinacota, Chile
Reef break
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
La Brava
Arica Y Parinacota, Chile
Beach break
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Arenillas Negras
Arica Y Parinacota, Chile
Beach break
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
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Thu 25
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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"Great Forecasts. Nothing more, nothing less."

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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