Tanegashima
Japan · Japan
Right now
ClearWind and swell direction
Swell: 0.7m ENE
Wind: 6 km/h W (offshore)
Beach faces: E
Very light wind. Expect glassy, clean conditions.
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.
- Sunny days ahead. Sun cream and a rashie.
- Standard shortboard conditions.
Today's briefing
0.8m swell at 8s. Light winds keeping things clean. Water temperature 22°C.
AI-generated summary for Tanegashima. Always check local reports before heading out.
Forecast accuracy at Tanegashima
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: 13). Conditions are below the Good threshold but may still be surfable.
Crowd report
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Session journal
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Create free accountTide
Approximate modelBest on mid-high tide
Swell forecast
7-day forecastDaily score breakdown
This week is looking above average for late April.
Comparing the 7-day forecast to the last 5 years of marine data for the same week at Tanegashima.
What's driving it
Recent form
Last 3 days of logged conditions.
About Tanegashima
Tanegashima is an exposed island situated south of Kyushu, Japan, renowned for its consistent surf and pristine coastal environment. The bathymetry is a complex mix of white silica sandbanks interspersed with shallow, flat coral and volcanic rock reefs. Because the island's eastern seaboard faces directly into the Pacific Ocean, it is highly receptive to south-easterly swells generated by summer typhoons and passing trade wind systems. A north-westerly wind provides the necessary offshore flow to groom the wave faces and prevent disorganised chop. The wave mechanics produce fast, punchy A-frame peaks that offer steep drops and carveable left and right-hand walls, occasionally throwing hollow barrel sections over the shallower reef patches. Due to the high volume of water moving across the mixed seafloor and the intense pace of the wave, it demands rapid pop-ups and immediate speed generation. Therefore, Tanegashima is best suited for intermediate to advanced surfers who can confidently negotiate powerful, shifting conditions and occasional sharp bottom contours.
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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 Tanegashima. 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 Tanegashima?
Check our timing score heatmap above for a week-by-week breakdown combining surf conditions with crowd pressure.