Praia Grande
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Hourly Forecast
Timezone: Europe/Lisbon
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Saturday 13
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Thursday 18
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Praia Grande surf guide

Praia Grande is a popular and spacious sandy beach located not far from Lisbon, making it a go-to destination for many surfers and tourists. During the summer, the beach gets crowded, with lots of people occupying the sand and parking lots. However, in the off-season, the waves tend to wake up, which means consistent swell and fewer crowds. You’ll find that low to mid tide is the sweet spot for surfing here, while high tide can lead to heavier sections with shore dump. If you’re looking for a quieter ride, check out Praia Pequena, a smaller spot to the north that often has less traffic.

This beach holds up really well with swells from the north to the southwest, making it a versatile location. The waves can range from waist to head high (about 0.6 to 2.4 meters). Expect beach breaks that can create both long, rideable walls and fast, heavy wedges. You’ll generally see different wave directions, offering both lefts and rights. Powerful swells roll in from deeper waters, so be prepared for some serious duck-diving, especially when the swell picks up. The best days to surf here are when there’s an east or southeast wind, which helps clean up the conditions.

Access to Praia Grande is pretty straightforward, with lots of parking available, but it gets hectic on weekends and during summer months. Keep in mind that the lineup can fill up due to the draw of the Lisbon crowd, but there’s enough space to spread out. The local vibe is mostly chill, even though there’s a bit of hustle in the water. Hazards include heavy shorebreak and rips, so it's essential to be aware of your surroundings. This spot caters to all surfing abilities—beginners can find their way, while more experienced surfers will enjoy the range of waves. The best surf seasons are in autumn and spring, and it’s suitable for various board types including shortboards, funboards, and bodyboards.

Surf reports and surf forecasts nearby Praia Grande

Foz do Lizandro
Lisboa, Portugal
Point break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
São Julião
Lisboa, Portugal
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Praia Grande
Lisbon, Portugal
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Praia Grande
Lisbon, Portugal
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Praia das Maçás
Lisbon, Portugal
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Praia Guincho
Lisboa, Portugal
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Praia Do Guincho
Lisboa, Portugal
Beach break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Monte Estoril
Unknown Region, Unknown Country
Unknown break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Bolina
Lisboa, Portugal
Point break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Poça
Lisboa, Portugal
Reef break
Sat 13
Sun 14
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
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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.

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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