Gonubie Reef
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Hourly Forecast
Timezone: Africa/Johannesburg
⏱️s.
⚡️kJ
Thursday 28
Friday 29
Saturday 30
Sunday 31
Monday 01
Tuesday 02
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Gonubie Reef surf guide

Located on the other side of the bay, Gonubie Reef is a surf spot that offers a consistent left pointbreak, which is quite rare in this area. The waves here can produce long, fun rides that are bashable, making it enjoyable for many surfers. The reef works well with various swell directions and sizes, but for those looking to get the best out of their session, a medium swell can present some challenges. When the tide drops, it definitely aids in making the paddle-out easier.

The optimal swell direction for Gonubie Reef is SouthEast, but the spot can also handle swells coming from NorthEast and SouthWest. It works well with swell sizes around 3ft (approximately 0.9 meters), and the waves generally break over a rocky ledge. The waves here are primarily point breaks, going left, which makes it a decent spot for those who enjoy that ride. For the best conditions, a NorthWest wind is preferred, and it can be surfed during low, mid, or high tides. It’s important to note that this spot is best suited for intermediate surfers due to the varying challenges it can present.

Gonubie Reef can get a bit crowded, especially when the conditions are good. It’s also located near a channel and rivermouth, so keep an eye out for boats while you're out there. The mix of surfers and boat traffic can add to the complexity of your session, so make sure to stay aware!

Surf reports and surf forecasts nearby Gonubie Reef

Naidoo Point
Eastern Cape, South Africa
Point break
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Eastern Beach
Eastern Cape, South Africa
Beach break
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Nahoon Reef
Eastern Cape, South Africa
Point break
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Bonza's
Eastern Cape, South Africa
Beach break
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Gonubie Reef
Eastern Cape, South Africa
Point break
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Gonubie Point
Eastern Cape, South Africa
Point break
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Graveyards - East Cape
Unknown Region, Unknown Country
Point break
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Yellowsands
Eastern Cape, South Africa
Rivermouth break
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
Glen Eden
Eastern Cape, South Africa
Reef break
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
The Berries
Eastern Cape, South Africa
Point break
Thu 28
Fri 29
Sat 30
Sun 31
Mon 1
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sun 7
Mon 8
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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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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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