Surf forecast · Japan · Shonan & Chiba
Surf forecast Kugenuma (Shonan) today
Waves, swell and wind at Kugenuma (Shonan) (Shonan & Chiba, Japan) today and for the next 3 days, every 3 hours of daylight, with a plain verdict per day — flat, small, fun, good or big, offshore or onshore — and the best window to paddle out.
These numbers are more than 7 hours old, so they are hidden. Open the live waves map for the current sea. Open the waves map centred on Kugenuma (Shonan)
Right now
Fun onshore.
Kugenuma (Shonan) surf forecast, next 3 days
- Flat
- Small
- Fun
- Good
- Big
Sunday 25 October
Fun Best window 16:00–17:00: fun, cross-shore.
| Time | Waves | Swell | Wind |
|---|---|---|---|
| 06:00 | 1.2 m · 8 s ↑S | 0.9 m · 7 s ↑S | 22–41 km/h ↑SW onshore |
| 09:00 | 1.3 m · 7 s ↑S | 0.9 m · 6 s ↑SSE | 23–48 km/h ↑SW onshore |
| 12:00 | 1.3 m · 7 s ↑S | 0.9 m · 5 s ↑S | 32–53 km/h ↑SSW onshore |
| 15:00 | 1.4 m · 7 s ↑S | 1.0 m · 6 s ↑S | 25–54 km/h ↑SSW onshore |
Monday 26 October
Fun Best window 06:00–09:00: fun, offshore.
| Time | Waves | Swell | Wind |
|---|---|---|---|
| 06:00 | 0.9 m · 7 s ↑S | 0.8 m · 6 s ↑S | 8–26 km/h ↑NNE light wind |
| 09:00 | 0.8 m · 7 s ↑S | 0.7 m · 6 s ↑S | 13–30 km/h ↑NNE offshore |
| 12:00 | 0.8 m · 7 s ↑S | 0.6 m · 6 s ↑S | 14–32 km/h ↑NNE offshore |
| 15:00 | 0.7 m · 7 s ↑S | 0.5 m · 6 s ↑S | 18–31 km/h ↑NNE offshore |
Tuesday 27 October
Small Best window 16:00–17:00: small, light wind.
| Time | Waves | Swell | Wind |
|---|---|---|---|
| 06:00 | 0.7 m · 7 s ↑SSE | 0.5 m · 7 s ↑S | 24–41 km/h ↑N offshore |
| 09:00 | 0.7 m · 7 s ↑S | 0.5 m · 6 s ↑S | 21–30 km/h ↑N offshore |
| 12:00 | 0.7 m · 8 s ↑S | 0.6 m · 6 s ↑S | 15–28 km/h ↑NNE offshore |
| 15:00 | 0.7 m · 7 s ↑S | 0.7 m · 6 s ↑S | 2–10 km/h ↑NE light wind |
Wednesday 28 October
Small Best window 06:00–09:00: small, offshore.
| Time | Waves | Swell | Wind |
|---|---|---|---|
| 06:00 | 0.7 m · 7 s ↑S | 0.6 m · 6 s ↑S | 12–24 km/h ↑NNE offshore |
| 09:00 | 0.6 m · 7 s ↑S | 0.5 m · 6 s ↑S | 11–31 km/h ↑NNE offshore |
| 12:00 | 0.6 m · 7 s ↑S | 0.5 m · 6 s ↑S | 13–32 km/h ↑NNE offshore |
| 15:00 | 0.5 m · 7 s ↑S | 0.4 m · 6 s ↑S | 15–35 km/h ↑NNE offshore |
Every 3 hours of daylight, local time. Waves = significant height of the whole sea, with the peak period; swell = the long-period part. Arrows point where the waves and the wind are going.
Forecast for Sun 04:00 local time · updated 2026-10-24 19:11 UTC
Waves map around Kugenuma (Shonan)
Open the waves map centred on Kugenuma (Shonan)
Live significant wave height from NOAA WaveWatch III, averaged over 2° cells: coarser than the forecast above, so near the coast it can differ from it.
More about Kugenuma (Shonan)
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Questions
- Is there surf at Kugenuma (Shonan) today?
- Fun: waves 1.2 m at 8 s from S, swell 0.9 m · 6 s S (Sun 04:00).
- Is the wind offshore at Kugenuma (Shonan)?
- Wind 20 km/h from SSW: onshore for a beach facing S.
- When is the best time to surf Kugenuma (Shonan) today?
- 16:00–17:00 (fun, cross-shore)
- How warm is the water at Kugenuma (Shonan)?
- 23.8 °C
- Where do the numbers come from?
- The Open-Meteo Marine API (wave models of Météo-France, ECMWF and NOAA) for a point just off the beach, and the Open-Meteo forecast for the wind. A model at sea, not a surf report: sandbanks, reefs and tide shape the waves you actually get.
Nearby surf spots
Shichirigahama 3 km · Onjuku 83 km · Tsurigasaki (Ichinomiya) 87 km · Habushiura (Niijima) 102 km · Oarai 152 km · Ikumi 514 km
How it is computed
Hourly Open-Meteo Marine forecast (wave height, peak period and direction, swell) at a point just off Kugenuma (Shonan), and the Open-Meteo wind at 10 m. Size: flat under 0.3 m, small under 0.8 m, fun under 1.5 m, good under 2.5 m (with a period of 8 s or more), big above. Wind: under 8 km/h light; otherwise offshore, cross-shore or onshore from its angle to the direction the beach faces. The best window is the 3 daylight hours with the best mix of size, period and wind. Rebuilt every 3 hours. Live map.