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Onjuku surfForecast / Chiba / Japan
12 Day Weather and Surf, issued 8 pm Friday 04 Apr 2025 JST
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 (Apr 05) at 3AM. The primary swell is predicted to be 1.1m and 12s period with a secondary swell of 0.6m and 8s. Another secondary swell of 0.9m and 6s is also forecast. 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 1.3m 12s and forecast to arrive on Saturday (Apr 05) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Monday (Apr 07) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sat 5th Apr) | 3.5ft (1.1m) 12s |
| Best Surf | 3AM (Sat 5th Apr) | 3.5ft (1.1m) 12s |
| Most Powerful | 6AM (Sat 5th Apr) | 4.5ft (1.3m) 12s |
Table - best surf conditions forecast for Onjuku over the next 12 days.
Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wed 16 | |||||||||||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 11 | 10 | 7 | 7 | 6 | 7 | 8 | 8 | 8 | 8 | 7 | 9 | 9 | 9 | 10 | 10 | 10 | 6 | 7 | 7 | 7 | 7 | 6 | 7 | 7 | 7 | 8 | 7 | 8 | 8 | 9 | 10 | 10 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 553 | 343 | 214 | 115 | 84 | 173 | 121 | 77 | 101 | 74 | 72 | 60 | 206 | 68 | 59 | 80 | 94 | 154 | 96 | 111 | 377 | 310 | 146 | 91 | 108 | 295 | 328 | 372 | 294 | 476 | 302 | 192 | 660 | 1433 | 341 | 360 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- on | on | on | on | cross- on | cross- off | cross- off | glass | cross- off | on | cross | off | cross- off | on | on | cross- on | cross- on | cross- on | cross | cross- off | cross- on | cross- on | cross- on | cross | cross | cross- on | off | cross- on | cross | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 7:05AM 1.34 | 7:28AM 1.22 | 3:04AM 10:50AM 1.18 1.09 | 3:02AM 1.21 | 1:18PM 1.13 | 3:13AM 1.25 | 2:27PM 1.20 | 3:26AM 1.29 | 3:16PM 1.27 | 3:41AM 1.32 | 3:56PM 1.33 | 3:57AM 1.36 | 4:33PM 1.36 | 4:13AM 1.39 | 5:08PM 1.38 | 4:30AM 1.41 | 5:43PM 1.36 | 4:48AM 1.42 | 6:18PM 1.33 | 5:08AM 1.42 | ||||||||||||||||
Low Tide / height (m) | 4:05PM 0.38 | 5:55PM 0.44 | 8:10AM 1.08 | 7:22PM 0.45 | 8:31AM 0.93 | 8:16PM 0.44 | 8:57AM 0.77 | 8:56PM 0.45 | 9:23AM 0.63 | 9:28PM 0.48 | 9:48AM 0.49 | 9:56PM 0.52 | 10:14AM 0.37 | 10:22PM 0.58 | 10:40AM 0.27 | 10:47PM 0.65 | 11:07AM 0.20 | 11:11PM 0.72 | 11:36AM 0.17 | 11:33PM 0.79 | 12:06PM 0.17 | |||||||||||||||
Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wed 16 | |||||||||||||||||||||||||
| Sunrise | - | 5:20 | - | - | 5:18 | - | - | 5:18 | - | - | 5:16 | - | - | 5:15 | - | - | 5:13 | - | - | 5:13 | - | - | 5:11 | - | - | 5:09 | - | - | 5:09 | - | - | 5:07 | - | - | 5:05 | - |
| Sunset | - | - | 6:01 | - | - | 6:02 | - | - | 6:02 | - | - | 6:04 | - | - | 6:05 | - | - | 6:06 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:08 | - | - | 6:09 | - | - | 6:10 |
 |  |  |  | |  |  | | |  | |  | | | | | |  |  |  |  | | | | | | | | | | | | | | | | |
Rain (mm) | 2 | - | 1 | - | - | 3 | 7 | - | 2 | - | - | - | - | - | - | - | - | - | 1 | 10 | 12 | 9 | - | - | 1 | 1 | - | - | - | - | - | - | - | - | 2 | - |
| Temp. °C | 12 | 12 | 13 | 15 | 17 | 17 | 15 | 14 | 13 | 13 | 15 | 16 | 16 | 16 | 16 | 15 | 17 | 17 | 16 | 13 | 14 | 14 | 17 | 18 | 18 | 12 | 14 | 14 | 16 | 16 | 15 | 19 | 19 | 18 | 18 | 19 |
| Feels °C (?) | 10 | 8 | 9 | 10 | 11 | 12 | 10 | 12 | 8 | 11 | 13 | 15 | 8 | 12 | 11 | 11 | 11 | 12 | 10 | 9 | 10 | 12 | 13 | 12 | 9 | 3 | 8 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 |
Short Range Forecast: Moderate rain (total 15mm), heaviest on Sun night. Very mild (max 17°C on Sun morning, min 10°C on Fri night). Winds increasing (calm on Fri night, fresh winds from the SW by Sun afternoon). | Days 3-6 Weather Summary Mostly dry. Very mild (max 17°C on Thu morning, min 12°C on Mon night). Winds increasing (calm on Mon night, strong winds from the SW by Tue night). | Days 6-9 Weather Summary Heavy rain (total 34mm), heaviest during Fri afternoon. Very mild (max 18°C on Sat afternoon, min 11°C on Sat night). Winds decreasing (near gales from the SSW on Sat night, light winds from the SW by Sun afternoon). | Long Range Forecast: Light rain (total 2mm), mostly falling on Wed morning. Very mild (max 19°C on Tue morning, min 12°C on Sun night). Winds increasing (calm on Sun night, strong winds from the SSW by Tue night). | |||||||||||||||||||||||||||||||||
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Live Wind Speed (km/h)
Surf Rating (10 Max)
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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.
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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