Santa Maria de Oia
Hourly
Confidence
Compare
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Thursday 30
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Timezone: Europe/Madrid
Wind: GFS (20251030 12z)
Waves: GFS WAVE (20251030 12z)

Santa Maria de Oia surf guide

Santa Maria de Oia is a surf spot located on a rugged stretch of coast, offering a unique experience for surfers. The scenery is picturesque, with few beachgoers around, providing a relatively quiet environment. The area is mostly free of facilities and has no parking issues, making it easy for surfers looking to hit the waves without distractions.

The surf here can be quite challenging, especially for those looking to tackle the left-hand reef breaks. It works best with a headhigh (about 2 meters) northwest swell to start breaking, but when conditions are right, you can expect powerful walls with barrel sections. The spot can handle swell sizes at around 6 feet (approximately 2 meters), and it's known to break over uneven reef. For the best results, surfers should aim for mid to high tides and check the wind direction, as a southeast breeze is preferable. This spot is definitely suited for expert surfers, with strong rips and hazards like a large rock in the middle of the wave that add to the challenge.

While the waves can be impressive, they require a certain skill level to navigate safely. The area tends to get crowded, but mainly with those who are experienced riders, so be prepared to share the waves with other chargers. Overall, Santa Maria de Oia offers an exciting surf experience for those ready to tackle its powerful conditions.

Surf reports and surf forecasts nearby Santa Maria de Oia

La Lanzada
Unknown Region, Unknown Country
Beach break
Thu 30
Fri 31
Sat 1
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Patos
Unknown Region, Unknown Country
Reef break
Thu 30
Fri 31
Sat 1
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Mon 10
Santa Maria de Oia
Unknown Region, Unknown Country
Reef break
Thu 30
Fri 31
Sat 1
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Moledo do Minho
Viana Do Castelo, Portugal
Rivermouth 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
Vila Praia de Âncora
Viana Do Castelo District, Portugal
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
Afife
Viana Do Castelo, Portugal
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
Viana do Castelo
Viana Do Castelo District, Portugal
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 de Amorosa
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
Esposende
Braga, Portugal
Beach break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
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Mon 10
Fão
Braga, Portugal
Unknown break
Thu 30
Fri 31
Sat 1
Sun 2
Mon 3
Tue 4
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Thu 6
Fri 7
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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: 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.

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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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