Surf forecast for Lopes Mendes

Tide

⏱️Periods.

⚡️EnergykJ

Timezone:

America/Sao_Paulo

Forecast updated:

27/06, 03:00

Wind: SN UNITY Atmos

(20260627 00z)

Waves: SN UNITY WAVE

(20260627 00z)

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Timeline

Tomorrow Sat 27/06

06:13 - 12:00

Best

Fun with calm cross-offshore.

12:00 - 16:00

Fun with light cross-offshore.

Sun 28/06

06:13 - 08:00

Fun with calm cross-onshore.

09:00 - 14:00

Best

Fun with light onshore.

14:00 - 17:45

Fun but blown out (moderate cross-onshore).

Unlock 3 more days in the timeline

More surf windows and day entries continue below

Lopes Mendes Surf Forecast Guide

Unknown

SW - SW

(Offshore from SW)

Surf spots near Lopes Mendes

Praia da Paciência

Rio de Janeiro, Brazil

Rio de Janeiro, Brazil

Rio de Janeiro, Brazil

Rio de Janeiro, Brazil

Rio de Janeiro, Brazil

Frequently asked questions

What are good surfing conditions for Lopes Mendes?

Lopes Mendes is usually best with offshore wind from southwest (SW).

Where is the surf spot Lopes Mendes?

Lopes Mendes is a surf spot in Abraão, Rio de Janeiro, Brazil.

What surf spots are near Lopes Mendes?

Other nearby surf spots are Praia do Leste, Praia do Sul, Aventureiro, and Praia da Paciência.

What wind direction is best for surfing at Lopes Mendes?

Southwest (SW) is offshore at Lopes Mendes.

What wind direction is offshore for surfing at Lopes Mendes?

Southwest (SW) is offshore at Lopes Mendes.

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 chooses the "dominant wave" using spot-adjusted surf energy (depth + directional fit). This is usually the first swell partition, but during local storms it can switch to wind waves. If that happens, values are shown in gray and italic.

🌒 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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Confidence

Confidence tells you how much the weather models agree on the forecast.

High confidence: Models agree closely; forecast is reliable.
Medium confidence: Some disagreement; conditions may shift slightly.

Low confidence

We calculate the wind confidence by comparing wind speed, gust and direction from multiple models (like GFS, ECMWF, Arome, and Harmonie) and seeing how closely they match. For wave certainty we compare height, period and direction, also on multiple models. 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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