Praia Grande - Rio Grande do Sul
Hourly
Confidence
Compare
⏱️s.
⚡️kJ
Thursday 30
Friday 31
Saturday 01
Sunday 02
Monday 03
Tuesday 04
Tap a forecast cell to explore conditions on the map.
Timezone: America/Sao_Paulo

Praia Grande - Rio Grande do Sul surf guide

Praia Grande is a well-known surf spot located in Rio Grande do Sul, stretching about 2 kilometers along the coast. This beach attracts surfers of all levels, especially during the summer months when the southeast swells roll in. It’s a spacious beach, providing enough room to spread out, though you might still encounter some crowds. The vibe here is laid-back, making it a nice place for both locals and visitors to enjoy the surf.

The surf at Praia Grande has various peaks, with the best action typically found at the southern end where the bottom is a mix of rock and sand. The waves are mostly lefts that break outside the point and reform inside, but you can also find rights. This spot handles swell sizes well, particularly around 3 ft (0.9 m), and works best with east and south swells. For the best experience, aim to surf during low to mid tide, and if the wind is coming from the northwest, you’re in for a treat. It can be a decent option during stormy weather in winter when it can pick up some extra power.

Praia Grande is also popular for kiteboarding, making it a lively venue overall. It scores fairly well for consistency, which is good news for those looking to catch some waves regularly. Just keep in mind that it's beginner-friendly, so you might encounter a mix of more experienced surfers along with those just starting out.

Surf reports and surf forecasts nearby Praia Grande - Rio Grande do Sul

Barra do Mampituba
Unknown Region, Unknown Country
Unknown break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Praia dos Molhes
Unknown Region, Unknown Country
Unknown break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Praia Grande - Rio Grande do Sul
Unknown Region, Unknown Country
Beach break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Prainha - Brazil
Unknown Region, Unknown Country
Beach break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Praia da Cal
Unknown Region, Unknown Country
Beach break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Guarita
Unknown Region, Unknown Country
Beach break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Ilha dos Lobos
Unknown Region, Unknown Country
Reef break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Itapeva
Unknown Region, Unknown Country
Beach break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Capão da Canoa
Unknown Region, Unknown Country
Beach break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Atlântida Pier
Unknown Region, Unknown Country
Unknown break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10

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"

Surfnerd Logo
Join Surfnerd+
Help keep Surfnerd independent and ad-free while we build the future of surf forecasting.
What you get today:
  • Surfnerd
    intelligent
    forecast
    (high accuracy!)
  • Shows
    confidence
    scores
    (more trust)
  • Compare
    models
    (more data)
  • Access all
    models
    (vs GFS only)
  • 1-hour
    forecast steps
    (vs 3-hour)
  • 12-day
    forecast range
    (vs 6-day)
"Great Forecasts. Nothing more, nothing less."
By purchasing the product, you accept the Terms of Use & acknowledge the Privacy policy.
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: Models diverge; treat forecast with caution.

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.

Share
Join Surfnerd for free
  • Save favorite spots
  • Set home spot
  • Log surf sessions
Sign up with AppleSign up with Google
Surfnerd for iOS: Faster loading, smoother experience.
Download on the App Store