Port Denison
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Hourly Forecast
Timezone: Australia/Perth
⏱️s.
⚡️kJ
Thursday 18
Friday 19
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Monday 22
Tuesday 23
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Port Denison surf guide

Port Denison is a surf spot located along the coast, known for its uneven reef and decent waves. The break is outside the long breakwall and is generally best with South-West swells, making it a popular choice for local surfers. The area has a laid-back vibe, perfect for surfers looking to catch some fun waves without too much hassle. Access is straightforward, but you'll find it gets a bit crowded when the swell is on.

The surf at Port Denison mainly produces lefts breaking over the reef, and it’s suitable for intermediates who are looking for a bit more power without the heavy intimidation. On good days, the waves can reach around 4ft (about 1.2 meters) and provide long rides. The best time to surf here is with East winds and during low to mid tides, which help improve the wave shape. However, it typically needs a solid winter pulse to really get firing, and you'll want to be prepared for some rip currents out there.

Getting to the break requires a long walk over spiky reef, so be careful with your feet. While there’s a good chance to score quality surf, sometimes you might find it fickle, depending on conditions. You can see crayfish boats heading out to the nearby islands, and many surfers are aboard searching for the right spot to surf while fishing and diving opportunities are top-notch. If you’re keen to explore the more remote breaks around here, consider chartering a boat or even a seaplane, but make sure you have someone knowledgeable with you.

Surf reports and surf forecasts nearby Port Denison

Blue Holes
Western Australia, Australia
Reef break
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mon 29
Jakes
Western Australia, Australia
Reef break
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mon 29
Bowes River
Western Australia, Australia
Reef break
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mon 29
Coronation
Western Australia, Australia
Beach break
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mon 29
Drummonds
Western Australia, Australia
Beach break
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mon 29
Sunset Beach
Western Australia, Australia
Beach break
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mon 29
Tarcoola
Western Australia, Australia
Beach break
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mon 29
Hell's Gate
Western Australia, Australia
Reef break
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mon 29
Flat Rock
Western Australia, Australia
Beach break
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mon 29
Port Denison
Western Australia, Australia
Reef break
Thu 18
Fri 19
Sat 20
Sun 21
Mon 22
Tue 23
Wed 24
Thu 25
Fri 26
Sat 27
Sun 28
Mon 29
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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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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