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Surf Forecasts:

Onjuku surf break

Onjuku surfForecast / Chiba / Japan

information circle12 Day Weather and Surf, issued 8 am Saturday 22 Nov 2025 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
19.4° C
 (Which is 1.6°C colder than average for this time of year)

Best Forecast Surf Conditions for Onjuku this week:

The surf forecast for Onjuku over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Nov 23) at 12AM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.4m and 4s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Onjuku in the next 12 days are 1.2m 12s and forecast to arrive on Friday (Nov 28) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Saturday (Nov 29) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sun 23rd Nov)1.5ft (0.4m) 10s
Best Surf12PM (Sun 23rd Nov)4ft (1.2m) 6s
Most Powerful 9PM (Fri 28th Nov)4ft (1.2m) 12s

Table - best surf conditions forecast for Onjuku over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 9mm), mostly falling on Sun night. Very mild (max 17°C on Sun afternoon, min 12°C on Sun night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Thu night. Very mild (max 17°C on Tue morning, min 12°C on Wed night). Winds increasing (calm on Tue morning, strong winds from the NNW by Wed afternoon).

Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
0
1
1
1
1
2
2
2
1
0
0
1
0
1
1
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.4
ESE
0.8
NE
0.4
ESE
1.1
SE
1.1
SE
1.8
SE
1.6
SE
1.5
SE
1.2
ESE
1.1
SE
1.1
SE
1.5
SW
0.7
SW
0.6
ESE
0.5
SE
0.7
ENE
1
S
1.2
S
1.3
SSW
1.8
SSW
0.7
ENE
Period(s) (?)106106778888868997566712
Wave
Graph
(?)Metric surfscale
Energy kJ (?)41493688109336329282175162158161705543424192136316142
Wind
(km/h)
10
NNE
20
ENE
10
ENE
5
WNW
5
E
20
NNW
10
NW
5
S
5
NW
5
SW
25
SW
40
WSW
15
NW
40
NNW
20
N
5
NE
15
SE
30
SSW
35
WSW
35
SW
35
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		cross-
off		glassglasscross-
off		cross-
off		glassglassglasscross-
on		cross-
on		cross-
off		cross-
off		offcross-
off		cross-
on		oncross-
on		cross-
on		off
High Tide
/ height (m)
4:17PM
1.43
6:47AM
1.27
4:47PM
1.42
7:28AM
1.24
5:18PM
1.38
8:14AM
1.21
5:52PM
1.33
9:06AM
1.19
6:33PM
1.25
10:03AM
1.20
7:30PM
1.14
10:56AM
1.22
9:09PM
1.04
Low Tide
/ height (m)
10:57AM
0.94
11:36PM
0.10
11:26AM
0.96
12:12AM
0.13
11:58AM
0.98
12:50AM
0.19
12:38PM
1.00
1:31AM
0.25
1:35PM
1.02
2:17AM
0.33
3:03PM
1.01
3:11AM
0.43
4:52PM
0.92
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Sunrise6:18--6:20--6:20--6:22--6:22--6:22--6:24--
Sunset-4:29--4:28--4:28--4:28--4:27--4:27--4:27-
part cloud
part cloud
light rain
light rain
rain showers
rain showers
clear
clear
clear
cloud
part cloud
clear
clear
clear
clear
cloud
cloud
rain showers
part cloud
clear
clear
Rain (mm)
--1116-----------4---
Temp. °C151416161716151614171717161513141617181815
Feels °C (?)1010151517171415131312975512131112119
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Latest Updates

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Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.

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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

Information about the Onjuku Surf forecast

The above surf forecast table for Onjuku provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Onjuku can be found by selecting the local surf guide option on the grey menu. Our Onjuku surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Onjuku) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Onjuku may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Onjuku is 3 km (2 miles) from Ohara. If you plan a holiday in Chiba, look for hotels and other accommodation in Ohara. Ohara has rooms for a wide range of budgets as well as car hire and transport links.

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