Tunnels
Hourly
Confidence
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⚡️kJ
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Tap a forecast cell to explore conditions on the map.
Timezone: Pacific/Honolulu
Wind: GFS (20251103 00z)
Waves: GFS WAVE (20251103 00z)

Tunnels surf guide

Just before the Prince Kuhio Hwy ends at the Na Pali Coast, you’ll find Tunnels. This spot is typical of the North Shore, known for its localized conditions and can often feel sharky. It offers some epic rights that break over sharp, live coral far from shore. Tunnels handles swells from the North-West (NW) pretty well, but can also work with North-East (NE) windswells if the conditions are right. Overall, this wave is more suitable for experts, especially if the locals are feeling generous.

Tunnels is a right-hander that has a reputation for being powerful, especially on a proper N to NE swell. Surfers can expect wave sizes ranging from about 5 feet to 15 feet (1.5 to 4.5 meters), with sets occasionally reaching closer to 20 feet (6 meters). The wave breaks over a reef, making it crucial for surfers to pay attention while paddling out. Speaking of the paddle-out, it’s long but manageable, so it’s a good warm-up for the longer rides you can catch. Optimal conditions usually arise with a calm or light southerly wind, and the best tide heights for Tunnels are low, mid, and high.

Tunnels can be crowded at times, but it’s usually not as packed as nearby Hanalei. You’ll often find surfers spread out along the points, but the local vibe is competitive, so respect is important. The area is generally pristine, although heavy rain can cause the river mouth in the bay to open up, affecting conditions temporarily. For those looking to ride here, having the right gear, like shortboards, bodyboards, or even guns for bigger days, is crucial. Best seasons to surf Tunnels are winter, spring, and autumn.

Surf reports and surf forecasts nearby Tunnels

Kalihiwai
Hawaii, United States
Point break
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Tue 11
Wed 12
Thu 13
Fri 14
Hideaways
Hawaii, United States
Reef break
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Tue 11
Wed 12
Thu 13
Fri 14
Hanalei Bay
Hawaii, United States
Reef break
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Tue 11
Wed 12
Thu 13
Fri 14
Tunnels
Hawaii, United States
Reef break
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Tue 11
Wed 12
Thu 13
Fri 14
Polihale
Hawaii, United States
Beach break, Reef break
Mon 3
Tue 4
Wed 5
Thu 6
Fri 7
Sat 8
Sun 9
Mon 10
Tue 11
Wed 12
Thu 13
Fri 14

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"

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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.
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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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