Racing Lefts
Hourly
Confidence
Compare
⏱️s.
⚡️kJ
Tuesday 02
Wednesday 03
Thursday 04
Friday 05
Saturday 06
Timezone:
Asia/Jayapura
Wind: ⭐ UNIFIED
(20251202 01z)
Waves: ⭐ UNIFIED
(20251202 01z)
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Racing Lefts surf forecast characteristics

Swell window
N - E
(Best from NE)
Swell size
2ft - 8ft
Swell breaks over
Dead Coral
Wave types
Reef
Wave directions
Left
Wind window
S - S
(Offshore from S)
Works at
Low, Mid, High
Skill Level
Intermediate

Racing Lefts surf forecast guide

Racing Lefts is located just down the reef from Sidewalk's rocky point. It’s a spot that surfers look to when the conditions are right, with plenty of sections that offer lefts. The reef is fairly straight, but you should keep in mind that some waves can close out. However, if you play it smart and don’t paddle back out, you could ride a different section each wave, giving you the chance to travel up to 1km when the swell is pumping. It's definitely a spot to check out if you're in the area.

The optimal swell direction for Racing Lefts is from the Northeast, with good waves coming in from both the North and East. You’ll find that it handles swell sizes starting at around 2ft (0.6m) and can produce some decent left-hand waves, especially when the wind is blowing from the South. The reef break here offers consistent action, and it’s suitable for intermediate surfers looking to gain some experience without the extra challenges of big waves or strong currents. Tides play a role too; you'll have the best luck during low, mid, or high tides.

While the spot can often be blown out and has some current sweeping down the reef, it still offers a fun surf experience when conditions align. Make sure to check the wind and swell forecasts before heading out to maximize your time in the water. Surfing at Racing Lefts can provide a solid session, especially on good days with the right wind and swell.

Surf schools and rentals

Surf reports and surf forecasts nearby Racing Lefts

Heavy's
Unknown Region, Unknown Country
Reef break
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Double Dome
Unknown Region, Unknown Country
Reef break
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Coconut Swing
Unknown Region, Unknown Country
Reef break
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Sidewalk
Unknown Region, Unknown Country
Reef break
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Racing Lefts
Unknown Region, Unknown Country
Reef break
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
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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