Onjuku

Beach break

Chiba, Japon

Forecast reliability: HighWhy?

Hand-calibrated spot: orientation, ideal swell, tide and hazards documented. The rating still comes from a global wave model — always check on site. How we compute ratings →

From level intermediate · Boardshort / lycraAccessible from intermediate level: shoulder-high waves (0.8–1.3 m), fairly forgiving. Below that, better to aim for more modest conditions.
Nearby spots
Conditions
6.2/10
Fair
Size
0.81.3 m
shoulder-high
Wind
13 km/h
NNE · Cross-shore
Swell
1.3 m
7 s · ESE
Best window · 21h6.3/10 · 0.91.4 m · 11 km/h
Today's take

Well-shaped wave, short, weak swell (windswell) from the ESE. Cross-shore wind that ruffles the surface a little. Fair conditions, surfable but nothing special: fine for a practice session.

Today's forecast

SATURDAY, AUGUST 15
RatingWaves mSwell sWind km/hWeather
09h0.91.5615🌤️27°
12h0.91.5714🌤️27°
15h0.91.5712🌤️26°
18hBest1.01.5711🌤️25°
21h0.91.578☀️25°

3-hour slots (spot local time · GMT+9) · ★ rating out of 5 · arrow = swell/wind direction · highlighted row = best slot

Tides

00h16 Sun06h12h18h0 mPM 05:45+0.7 mBM 12:00-0.3 mPM 18:15+0.8 mmaintenant

The spot

wind swell

Climate & wetsuit through the year

Last updated: Sat, Aug 15, 14:38 GMT+9 · Données : Open-Meteo (modèles vagues + météo) · servies depuis la base pré-calculée.