Niijima
Japan · Japan
Right now
OvercastWind and swell direction
Swell: 1.0m ENE
Wind: 14 km/h SE (onshore)
Beach faces: E
Onshore wind (blowing from sea to land). Expect choppier, less defined waves.
Swell is arriving at a great angle for this beach.
Today hour by hour
Updated 08:38Expected crowds
Prediction model v15amDawn patrol territory
7amMidweek quiet
Next 7 days
Forecast via Open-MeteoWhat to pack
- Warm 23°C water. Shortie or boardshorts.
- Strong winds on some days. Check the forecast each morning.
- Standard shortboard conditions.
Today's briefing
1.0m swell at 7s. Onshore wind creating some chop. Water temperature 22°C.
AI-generated summary for Niijima. Always check local reports before heading out.
Forecast accuracy at Niijima
Not enough data yet. Log a session to help build the accuracy score.
Best time to go
No great windows in the next 2 days
Best available option is Today around 5am (score: 29). Conditions are below the Good threshold but may still be surfable.
Crowd report
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Session journal
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Approximate modelSwell forecast
7-day forecastDaily score breakdown
This week is looking well above average for late April.
Comparing the 7-day forecast to the last 5 years of marine data for the same week at Niijima.
What's driving it
Recent form
Last 3 days of logged conditions.
About Niijima
Niijima is a highly exposed, exceptionally powerful beach break located on a volcanic island south of Tokyo, Japan. The seafloor comprises an exceptionally steep gradient of highly compacted volcanic silica sand. This sudden depth transition acts as a massive swell magnet, intercepting deep-water south-easterly groundswells and intense Pacific typhoon energy. When the swell strikes the sandbank, it decelerates abruptly, forcing the wave to pitch top-to-bottom and create a remarkably thick, cylindrical barrel with a steep, near-vertical take-off. A north-westerly wind blows directly offshore, retarding the lip and smoothing the aggressive wave face. Due to the sheer hydraulic power of the plunging shorebreak and the necessity for split-second reflexes, Habushiura Beach on Niijima is primarily suited for advanced surfers. The wave mechanics are highly reminiscent of heavy reef breaks, demanding robust board control and profound spatial awareness to execute high-velocity drops before the wave detonates entirely on the shallow sandbars.
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Create Profile →Frequently asked questions
How often is this page updated?
Current conditions refresh every 6 hours when the cron runs. Hourly data updates every 30 minutes. The 7-day forecast, luck factor, and packing notes are all pre-computed at the same time.
What is the luck factor?
We compare the 7-day forecast to the last 5 years of marine data for the same week at Niijima. The delta tells you whether conditions are shaping up better, worse, or about the same as a typical late April.
How is 'best session' picked?
We score each day of the 7-day forecast using the same algorithm as the leaderboard, and highlight the highest scorer.
Where does the data come from?
Open-Meteo's Marine API (swell height, period, water temperature) and Weather API (wind and conditions).
Does the score capture local knowledge?
Honestly, no. Every break has tide windows, swell directions and reef contours that a global model cannot see. Treat the score as a starting point, then check a local cam.
When is the best time to surf Niijima?
Check our timing score heatmap above for a week-by-week breakdown combining surf conditions with crowd pressure.