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Surf Forecasts:

Onjuku surf break

Onjuku surfForecast / Chiba / Japan

information circle48hr Weather and Surf, issued 8 am Wednesday 14 Jan 2026 JST
Forecast update in hr  min  s Forecast update imminent
Onjuku surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Onjuku sea temperature is
17.4° C
 (Which is normal for this time of year)

How big are the waves at Onjuku today?

The current surf forecast for Onjuku at 11AM is: 1.1m 10s primary swell from a South-southwest direction (forecast issued at 08:00am January 14). An open ocean swell of 0.3m 8s is not directed at the surf break, a second open ocean swell of 0.6m 7s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.

Time (JST) & DateWave HeightWave Period
Morning (14 Jan)4ft (1.2m)10s
Afternoon (14 Jan)3ft (0.9m)9s
Evening (14 Jan)2.5ft (0.7m)9s

Table - waves today at Onjuku. (Swell directed towards the surf break)

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Wednesday
14
Thursday
15
Friday
16
Sat
17
6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM
Rating
(10 max)
2
2
2
1
1
1
1
1
0
0
0
0
0
0
0
0
0
2
1
1
1
1
1
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.4
SSW
1.2
SSW
1
SSW
0.9
SSW
0.8
SSW
0.7
SSW
0.6
SSW
0.4
SW
0.3
SE
0.3
SE
0.3
SE
0.5
SW
1.6
SW
2
SW
1.9
SW
1.9
SW
1.6
SW
1.3
SSW
1
SSW
0.8
SSW
0.7
SSW
0.6
SSW
0.3
ENE
0.3
ENE
Period(s) (?)10101099999999677777888881212
Wave
Graph
(?)Metric surfscale
Energy kJ (?)370269196139110755525131315152854003613812852031368455393029
Wind
(km/h)
15
N
15
N
15
N
10
NNE
10
NNE
15
N
10
NNE
10
N
15
N
15
NNW
10
WSW
15
WSW
35
WSW
45
WSW
45
WSW
45
WSW
30
W
10
NW
15
NNE
10
NE
5
NE
5
ENE
0
NW
10
NNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffoffoffoffoffcross-
off		offoffoffcrosscross-
on		cross-
on		cross-
on		cross-
on		crosscrosscross-
off		cross-
off		cross-
off		cross-
off		glassglasscross-
off
High Tide
/ height (m)
4:38AM
1.06
11:44AM
1.25
4:29AM
1.14
12:54PM
1.27
4:49AM
1.21
1:55PM
1.31
Low Tide
/ height (m)
5:18AM
1.06
8:14PM
0.36
7:49AM
1.09
9:00PM
0.26
8:57AM
1.07
9:41PM
0.18
Wednesday
14
Thursday
15
Friday
16
Sat
17
Sunrise-6:46-------6:46-------6:46------
Sunset---4:46-------4:47-------4:49----
clear
clear
part cloud
part cloud
part cloud
clear
clear
cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
------------------------
Temp. °C8910101098887910111314141312131414131210
Feels °C (?)3345634432552344699101110106
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Onjuku surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Onjuku at:
surf-forecast.com

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