Onjuku surf break

Onjuku surfForecast / Chiba / Japan

information circle16 Day Weather and Surf, issued 2 am Tuesday 02 Jun 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
22.3° C
(Which is slightly warmer than usual)

Onjuku surf forecast from 1 Jun 2026:

  • Best quality surf: Wednesday 3 Jun, 3PM (local time) - 15ft (4.5m), 11s period, SSE swell with offshore winds.
  • Most powerful swell: Wednesday 3 Jun, 3PM (local time) - 15ft (4.5m), 11s period, SSE swell with 4,858 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 3 Jun, 3PM (local time) - 15ft (4.5m), 11s period with SSE swell.

Best Forecast Surf Conditions for Onjuku this week:

The surf forecast for Onjuku over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jun 03) at 3PM. The primary swell is predicted to be 4.5m and 11s period with a secondary swell of 3.0m and 14s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Onjuku in the next 16 days are 4.5m 11s and forecast to arrive on Wednesday (Jun 03) at 3PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 8s period and expected on Thursday (Jun 04) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Wed 3rd Jun)15ft (4.5m) 11s
Best Surf 3PM (Wed 3rd Jun)15ft (4.5m) 11s
Most Powerful 3PM (Wed 3rd Jun)15ft (4.5m) 11s

Table - best surf conditions forecast for Onjuku over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 148mm), heaviest during Wed morning. Warm (max 23°C on Wed morning, min 16°C on Thu night). Winds increasing (light winds from the S on Tue afternoon, gales from the ESE by Wed morning).

Days 4-6 Weather Summary

Heavy rain (total 72mm), heaviest during Sun night. Warm (max 23°C on Sun night, min 16°C on Fri afternoon). Winds increasing (light winds from the NNE on Sat night, strong winds from the E by Sun night).

Tuesday
2
Wednesday
3
Thursday
4
Friday
5
Saturday
6
Sunday
7
Monday
8
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
!
2
3
3
!
!
3
!
3
4
4
3
1
1
!
3
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
S
12
0.9
SSW
13
0.7
SSW
12
3.5
SE
8
4.5
SSE
11
1.9
SE
10
2.5
ENE
10
2.5
ENE
10
3.5
ENE
11
4
ENE
12
3
ENE
13
3.5
ENE
12
2.5
ENE
12
2.5
ENE
12
2.1
E
12
1.9
E
11
1.8
E
11
2.3
E
10
3.5
SSW
9
1.9
E
9
1.4
ENE
9
Wave Graph
Metric surfscale
Energy kJ
184
312
155
1232
4858
699
1149
1367
2639
4136
3070
4176
1903
1699
1208
882
764
1163
1859
606
333
Wind (km/h)
20
SSW
20
SSW
20
SE
65
ESE
40
NNW
40
N
35
NNE
30
N
30
NNE
35
NNE
35
NE
25
NNE
20
NE
15
ENE
5
NNE
15
NE
15
ESE
30
E
25
WNW
15
WSW
10
WSW
on
on
cross-on
cross-on
off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-on
cross
cross-off
cross
cross
High Tide
6:47PM1.27m
4:42AM1.41m
7:24PM1.24m
5:17AM1.38m
8:04PM1.23m
5:55AM1.33m
8:44PM1.22m
6:37AM1.26m
9:26PM1.23m
7:30AM1.17m
10:08PM1.24m
8:46AM1.08m
10:49PM1.26m
Low Tide
11:32AM0.11m
11:23PM0.97m
12:08PM0.13m
11:58PM0.98m
12:45PM0.18m
00:40AM0.98m
1:23PM0.24m
1:32AM0.97m
2:03PM0.32m
2:39AM0.94m
2:46PM0.41m
3:59AM0.88m
3:35PM0.51m
cloud
cloud
heavy rain
heavy rain
heavy rain
part cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
light rain
mod rain
heavy rain
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:24
4:24
4:24
4:24
4:24
4:24
4:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:46
6:47
6:49
6:49
6:50
6:50
6:51
34
91
23
1
9
62
Temp °C
22
21
21
23
22
19
18
18
17
18
18
16
18
19
18
20
19
23
21
22
21
21
20
17
17
19
12
13
13
13
12
12
11
16
17
18
20
18
22
21
23
23
Swell 1
Height (m)
Direction
Period (s)
0.8
S
12
0.9
SSW
13
0.7
SSW
12
0.6
SSW
15
3
SSW
14
1.9
SE
10
0.7
SE
10
0.7
S
9
2.5
ENE
11
3
ENE
12
0.2
SSW
7
3
ENE
12
2.5
ENE
12
2.5
ENE
12
2.1
E
12
1.9
E
11
1.8
E
11
0.2
SSW
7
3
E
9
1.9
E
9
1.4
ENE
9
Energy kJ
184
312
155
142
3460
638
100
78
1483
2455
5
2608
1903
1699
1208
882
764
5
1526
606
333
Swell 2
Height (m)
Direction
Period (s)
0.6
E
9
0.6
E
9
0.6
E
9
0.8
SW
13
1.5
SSW
12
0.7
SSW
11
0.4
SSW
8
0.3
SSW
8
0.2
SSE
12
0.2
SSE
11
0.2
S
11
0.2
SSW
7
0.2
SSW
7
0.2
SSW
7
2.1
S
9
1.8
SSE
9
1.3
S
8
Energy kJ
63
61
60
239
699
99
22
11
14
11
9
5
5
5
718
552
212
Swell 3
Height (m)
Direction
Period (s)
0.6
SSW
15
0.3
SE
12
0.3
SE
12
0.7
S
9
0.1
S
12
0.1
S
19
0.1
SE
11
0.7
SE
7
0.9
SSW
12
0.6
SSW
11
Energy kJ
148
21
21
74
3
7
5
52
231
82
Wind waves
Height (m)
Direction
Period (s)
0.5
S
4
0.6
S
4
0.8
SSE
5
3.5
SE
8
4.5
SSE
11
2.5
NNE
8
2.5
ENE
10
2.5
ENE
10
3.5
ENE
11
4
ENE
12
3
ENE
13
3.5
ENE
12
2.3
E
10
3.5
SSW
9
0.6
NW
3
0.9
SSW
8
Energy kJ
6
11
33
1232
4858
869
1149
1367
2639
4136
3070
4176
1163
1859
7
100
Nearest Offshore or Glassy
Rating
(10 max)
2
2
1
4
4
3
2
2
1
1
1
1
1
4
4
3
3
4
4
4
3
Distance (km)
9
9
101
571
554
110
73
206
200
536
51
51
51
0
0
0
9
536
18
2
2
Best forecast wave conditions in Chiba
Rating
(10 max)
2
2
1
1
1
4
4
4
3
4
4
3
Best forecast wave conditions in Japan
Rating
(10 max)
4
4
1
8
4
3
2
2
1
1
1
2
2
4
4
4
6
4
4
4
3
Header Global
Rating
(10 max)
5
6
4
5
5
5
5
4
5
6
5
9
9
7
8
9
8
9
7
8
9
  • 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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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 16 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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