Surf Forecast Surf Report
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Onjuku surf break
Beach
Onjuku location map

Onjuku surf Forecast / Chiba / Japan

12 Day Weather and Surf, issued 2 pm Thursday 18 Jul 2024 JST
Forecast update in  hr  min  s 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
23.8° C
(Statistics for 18 Jul 1981-2005 - mean: 25.5 °C max: 27.6 °C min: 23.4 °C)
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  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
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
23.8° C
(Statistics for 18 Jul 1981-2005 - mean: 25.5 °C max: 27.6 °C min: 23.4 °C)


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 Saturday (Jul 20) at 6PM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 1.0m and 6s. Another secondary swell of 0.7m and 10s is also forecast. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Onjuku in the next 12 days are 0.9m 10s and forecast to arrive on Thursday (Jul 18) 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 0.4m 3s period and expected on Tuesday (Jul 23) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Sat 20th Jul)4.5ft (1.3m) 6s
Best Surf 9PM (Sat 20th Jul)4.5ft (1.4m) 6s
Most Powerful 9PM (Thu 18th Jul)3ft (0.9m) 10s

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

Updates in  hr  min  s Update imminent
Thu
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tue
30
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.9
ESE
0.9
ESE
0.9
ESE
0.9
ESE
0.8
ESE
0.8
ESE
0.7
SE
0.7
SE
0.7
SSW
0.5
ESE
0.7
SE
0.6
ESE
0.6
ESE
0.6
ESE
0.6
ESE
0.6
ESE
0.5
ESE
0.5
ESE
0.5
ESE
0.5
ESE
0.5
ESE
1
SSW
0.5
SE
0.5
SE
0.5
SE
1.2
S
1.7
S
1.9
S
2.1
S
2.2
S
2.3
S
2.5
S
2.5
S
2
S
1.9
S
1.8
S
Period(s) (?)101010101010101079101010109999101094101091314131312121211888
Wave
Graph
(?)Metric surfscale
Energy (?)14516816815412212510410050479869676059594950525246394547434611063128514651392145516801593520410358
Wind
(km/h)
15
SSW
25
SW
25
SW
30
SW
25
SW
25
SW
25
SW
10
N
10
E
10
SE
15
SSW
25
SW
25
SSW
10
SW
10
N
5
S
15
SW
10
SSW
20
SSW
20
SW
15
SSW
25
SSW
25
SW
25
SSW
25
SSW
20
SSW
20
S
20
S
20
S
20
S
20
S
20
S
25
SSW
30
SSW
30
SSW
40
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
offcrosscross-
on
cross-
on
cross-
on
cross-
on
cross-
on
offoncross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
onononononononononcross-
on
cross-
on
cross-
on
High Tide
/ height (m)
4:15PM
1.19
1:13AM
1.32
4:50PM
1.27
2:11AM
1.37
5:23PM
1.33
3:03AM
1.43
5:55PM
1.36
3:53AM
1.47
6:26PM
1.38
4:41AM
1.49
6:55PM
1.38
5:29AM
1.47
7:22PM
1.38
6:20AM
1.41
7:49PM
1.37
7:15AM
1.31
8:14PM
1.36
8:18AM
1.18
8:41PM
1.36
9:39AM
1.06
9:10PM
1.35
11:44AM
1.00
9:46PM
1.34
Low Tide
/ height (m)
8:09PM
1.08
9:08AM
0.16
9:12PM
1.07
9:52AM
0.06
9:59PM
1.04
10:34AM
-0.02
10:41PM
0.99
11:15AM
-0.04
11:21PM
0.93
11:54AM
-0.02
12:03AM
0.85
12:31PM
0.07
12:47AM
0.76
1:07PM
0.20
1:34AM
0.67
1:41PM
0.38
2:27AM
0.58
2:14PM
0.57
3:28AM
0.51
2:44PM
0.76
4:39AM
0.45
3:11PM
0.93
6:01AM
0.38
Thu
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tue
30
Sunrise--4:37--4:37--4:39--4:39--4:39--4:41--4:41--4:43--4:43--4:43--4:45--4:46
Sunset6:51--6:51--6:50--6:50--6:49--6:47--6:47--6:46--6:45--6:45--6:45--6:44--
part cloudpart cloudpart cloudcloudpart cloudpart cloudrain showersthunderstorm clearpart cloudpart cloudclearclearpart cloudclearclearclearclearclearrain showersclearclearpart cloudpart cloudclearpart cloudpart cloudthunderstorm thunderstorm thunderstorm thunderstorm thunderstorm part cloudcloudpart cloudpart cloud
Rain (mm)
------12-----------1-------15411----
Temp. °C282628282629302728292629292629292728282629282628282728282727272728282729
Feels °C (?)302828282730313131333030313034343132302830292730293030313029303029292827

Short Range Forecast: Light rain (total 3mm), mostly falling on Sat night. Warm (max 30°C on Sat afternoon, min 25°C on Thu night). Winds decreasing (fresh winds from the SW on Fri afternoon, light winds from the N by Sat night).

Days 3-6 Weather Summary Mostly dry. Warm (max 29°C on Sun afternoon, min 25°C on Mon night). Wind will be generally light.

Days 6-9 Weather Summary Some drizzle, heaviest during Wed night. Warm (max 29°C on Thu morning, min 25°C on Wed night). Wind will be generally light.

Long Range Forecast: Moderate rain (total 12mm), heaviest on Sun morning. Warm (max 29°C on Tue morning, min 26°C on Sat night). Winds increasing (light winds from the S on Sat night, strong winds from the SW by Tue morning).

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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 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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