Onjuku Surf Forecast and Surf Reports

(Chiba, Japan)

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Onjuku Surf Guide

Onjuku in Kanagawa and Chiba is an exposed reef/jetties break that has inconsistent surf Ideal winds are from the northwest. Windswells are much more typical than groudswells and the best wave direction is from the southeast. The reef provides both left and right breaks. Good surf at all stages of the tide. Sometimes crowded. Rocks are a hazard.

Onjuku Spot Info

Type:	Rating:	Reliability:	Todays Sea Temp*:
Beach	2	inconsistent	19.0°C*ocean temperature recorded from satellite

Surfing Onjuku:

The best conditions reported for surf at Onjuku occur when a South-southeast swell combines with an offshore wind direction from the North.

Hourly Forecast

16 Day Forecast

What's the best time of year to surf Onjuku (for consistent clean waves)?

septemberBest Season: autumn

The best time of year for surfing Onjuku with consistent clean waves (rideable swell with light / offshore winds) is during Autumn and most often the month of September. Clean surfable waves are typically found 26% of the time in September while 35% of the time it tends to be blown out. For the remaining 39% of the time it is considered too small by most surfers but may still be OK for beginners and groms at times.

clean

26%

Surfable waves that hold up well for longer rides in prevailing cross-offshore, offshore or light wind conditions.

blown out

35%

Surfable sized waves that are of poorer quality due to prevailing onshore, cross-onshore or windy conditions (may be preferable for kitesurfing).

too small

39%

Waves usually considered too small for good surf. Some wave-magnet breaks may still work though if conditions are right (on occasion).

Explore Onjuku Location Map

Interactive Onjuku surf break location map. View information about nearby surf breaks, their wave consistency and rating compared to other spots in the region. Current swell conditions from local buoys are shown along with live wind speed and direction from nearby weather stations. Click icons on the map for more detail. The closest passenger airport to Onjuku is New Tokyo International Airport (NRT) in Japan, 61 km (38 miles) away (directly). The second nearest airport to Onjuku is Tokyo International Airport (HND), also in Japan, 67 km (42 miles) away.

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Please note that some surf spot locations are approximate to protect their exact location while others are not shown at close zoom level.

Onjuku Surf Forecasts:

Hourly Forecast

16 Day Forecast

Todays Surf Summary
Wednesday, 6 May 2026, 15:47 Local Time

m, °C	Wednesday 06
ft, °F	12PM	3PM	6PM	9PM
Wave (m)	SSE	SSE	SSE	SSE
Period (s)	5	5	6	6
Wind (km/h)
Wind State	on	on	on	cross- on

What does Onjuku look like?

Latest photos from Onjuku. Upload your own or view all photos on the gallery page.

Credit: –Credit: Alex

Tides at Onjuku

Current tide and informaton

For Katsuura, 7 km from Onjuku.

Next High Water: 08:14pm | 1.17m

Next Low Water: 12:28am | 0.99m

NEXT	IS AT (local time)	remaining
high tide
low tide

Onjuku Sea Temperature

The Onjuku water temperature is reasonably warm (19.0 °C) and the air temperature will similar (windchill forecast 17.0 °C). A good quality summer wetsuit would be ideal.

Today, many surfers would wear a summer wetsuit.

Current Temp*: 19.0°C*ocean temperature recorded from satellite

View Sea Temp Map

Swell History at Onjuku

Surf stats for Onjuku, see the swell variation by month or season on the history page here.

Average Swell

View Swell Statistics

Wind History at Onjuku

Wind stats for Onjuku, see the variation in direction and stength by month or season on the history page here.

Average Wind

View Wind Statistics

Onjuku Reviews:

Interactive Porthcawl Point location map. View nearby buoy information, live wind conditions and surrounding roads, paths and locations to help find new breaks. Click the buoys or wind icon to view more information.

Ratings

Based on 5 votes.

Overall:2.0
Quality on a good day:3.4
Consistency of Surf:4.0
Difficulty Level:1.8
Wind and Kite Surfing:4.0
Crowds:2.6
...

See all 18 ratings

Review

Impartial reviews submitted by Surf-Forecast users.

Kelly Cho from Japan

“Onjuku is a beautiful white sand beach. Excellent surf spot All year around for from beginners to experts. Many resident pro surfers. Summer is the best for both surfing and holiday.”

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