Overview

Onjuku is a kitesurfing spot on the east coast of the Boso Peninsula, Chiba Prefecture. This renowned surf beach faces the Pacific and offers regular wave conditions. Southwest winds in summer and northeast winds in winter feed the spot.

The water is oceanic with waves. Tides are significant. Suited for intermediate to advanced riders.

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Spot forecast for Onjuku

Sunrise 05:48 · Sunset 16:58

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< 7 kn7–12 kn13–20 kn21–30 kn31–40 kn41+ kn Gusts Your minimum: 7 kn

Forecasts provided by Open-Meteo

Swell and waves

Swell and tides over 8 days. Premium members see the swell and tides over 8 days. Without a subscription: 5 days.

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Wave height: < 0.5 m 0.5–1 m 1–2 m 2–3 m ≥ 3 m

Swell data by Open-Meteo Marine

Tides

Heights above lowest astronomical tide, in the spot's local time. Computed 6.6 km from the spot.

Tuesday 20 October Low tide 05:22 · 0.6 m High tide 13:48 · 1.3 m Low tide 19:22 · 1.1 m High tide 22:55 · 1.1 m
Wednesday 21 October Low tide 06:34 · 0.6 m High tide 14:07 · 1.3 m Low tide 19:54 · 1 m
Thursday 22 October High tide 00:58 · 1.2 m Low tide 07:28 · 0.6 m High tide 14:25 · 1.4 m Low tide 20:22 · 0.8 m
Friday 23 October High tide 02:07 · 1.3 m Low tide 08:11 · 0.6 m High tide 14:43 · 1.4 m Low tide 20:50 · 0.6 m
Saturday 24 October High tide 02:58 · 1.4 m Low tide 08:51 · 0.7 m High tide 15:01 · 1.5 m Low tide 21:21 · 0.5 m

Onjuku: when to go?

Rideable days and hours computed for a minimum wind of 7 knots · log in to set your own (foil, twin-tip…)

Season · peak

248h

in September · 26 rideable days

Wind is uneven from month to month: the best months are September, September and October, at 26 rideable days and 26 °C. The low point is January, at 11 days.

Rideable days per month

Wind strength when it is rideable

7-12 knots · 77%13-20 knots · 22%21-30 knots · 1%

When the spot works, wind sits mostly between 7 and 12 knots — 77% of rideable hours. Big-kite territory. The coldest month is February, at 11 °C. The wettest month is June, with 303 mm.

Monthly averages: Onjuku

Monthly averages — Onjuku — averaged over 2 years of records — Weather data by Open-Meteo.com — How it is calculated
Month	Rideable days	Usable wind	Temperature	Rain
January	11.0	68 h	12 °C	50 mm
January	11.0	68 h	12 °C	50 mm
February	15.5	125 h	11 °C	104 mm
February	15.5	125 h	11 °C	104 mm
March	19.5	172 h	14 °C	285 mm
March	19.5	172 h	14 °C	285 mm
April	18.5	182 h	18 °C	189 mm
April	18.5	182 h	18 °C	189 mm
May	21.0	252 h	21 °C	300 mm
May	21.0	252 h	21 °C	300 mm
June	16.0	145 h	24 °C	303 mm
June	16.0	145 h	24 °C	303 mm
July	18.5	219 h	28 °C	199 mm
July	18.5	219 h	28 °C	199 mm
August	19.5	216 h	29 °C	252 mm
August	19.5	216 h	29 °C	252 mm
September	26.0	248 h	28 °C	237 mm
September	26.0	248 h	28 °C	237 mm
October	25.5	264 h	22 °C	225 mm
October	25.5	264 h	22 °C	193 mm
November	18.5	148 h	18 °C	130 mm
November	18.5	148 h	16 °C	92 mm
December	11.0	85 h	13 °C	81 mm
December	11.0	85 h	11 °C	79 mm

Photo gallery of Onjuku

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Technical details of Onjuku spot

The spot works with winds from N, NNE, NE, S, SSW, SW.

Rideable Not rideable

Spot opening date · Required level

Spot opening date: Open all year round
Required level: Intermediate

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Nearby spots

All spots: Chiba

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Onjuku kitesurf, wingfoil and surf spot