Copacabana - Posto 5
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Hourly Forecast
Timezone: America/Sao_Paulo
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Saturday 13
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Copacabana - Posto 5 surf guide

Copacabana - Posto 5 is located in the heart of Copacabana, one of the most famous beaches in the world. It attracts both locals and tourists who come to enjoy the vibrant atmosphere along Avenida Atlantica. The accessibility is great, with the beach right in front of Hotel Othon. However, the surf here can be hit or miss, so don't expect consistent waves every day.

The surf at Posto 5 typically works best during fall and winter, especially when the swell comes from the southeast. You can see waves ranging from about 1 to 2 meters (3 to 6 feet), which can hold even larger swells on good days. The waves can barrel and break both left and right, mostly over sand. When the tide is medium to high, the waves are often less powerful, so low to mid tides are preferred. The bottom is sandy, but be careful of shallow sandbanks closer to the shore. On busy days, it can get crowded, and you'll find a mix of intermediates and some experts trying to catch the good sets.

While you’ll mostly find beach breaks, it’s worth noting that the waves can deliver some decent rides when conditions align, with offshore winds from the west or southwest. The riding spots cater to various board types, including shortboards, bodyboards, funboards, and longboards. If you're looking for a place with lots of action and some solid swell, Posto 5 might just be the spot, especially when it's firing.

Surf reports and surf forecasts nearby Copacabana - Posto 5

Praia da Macumba
Unknown Region, Unknown Country
Beach break
Sat 13
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Barra da Tijuca
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Beach break
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São Conrado
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Beach break
Sat 13
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Pepino
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Beach break
Sat 13
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Leblon
Unknown Region, Unknown Country
Beach break
Sat 13
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Copacabana - Posto 5
Unknown Region, Unknown Country
Beach break
Sat 13
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Praia de Ipanema
Unknown Region, Unknown Country
Beach break
Sat 13
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Arpoador
Unknown Region, Unknown Country
Beach break
Sat 13
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Diabo
Unknown Region, Unknown Country
Beach break
Sat 13
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Itacoatiara
Unknown Region, Unknown Country
Beach break
Sat 13
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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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"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.

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