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Monabe Rivermouth surfForecast / Shikoku / Japan
12 Day Weather and Surf, issued 2 pm Sunday 13 Jul 2025 JST
Best Forecast Surf Conditions for Monabe Rivermouth this week:
The surf forecast for Monabe Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Jul 14) at 9PM. The primary swell is predicted to be 1.0m and 13s period with a secondary swell of 1.2m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Monabe Rivermouth in the next 12 days are 2.5m 9s and forecast to arrive on Thursday (Jul 17) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 8s period and expected on Monday (Jul 14) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 14th Jul) | 3.5ft (1.0m) 13s |
| Best Surf | 9PM (Mon 14th Jul) | 3.5ft (1.0m) 13s |
| Most Powerful | 9AM (Thu 17th Jul) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Monabe Rivermouth over the next 12 days.
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Fri 25 | ||||||||||||||||||||||||
| 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 | Night | AM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 9 | 9 | 6 | 6 | 12 | 10 | 10 | 11 | 10 | 10 | 10 | 9 | 9 | 8 | 9 | 9 | 9 | 9 | 11 | 10 | 10 | 11 | 10 | 9 | 7 | 8 | 10 | 12 | 15 | 14 | 13 | 12 | 12 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 293 | 243 | 243 | 299 | 731 | 466 | 485 | 785 | 755 | 815 | 652 | 1099 | 872 | 1190 | 390 | 334 | 462 | 487 | 581 | 568 | 584 | 679 | 579 | 403 | 388 | 489 | 1132 | 3256 | 11653 | 12650 | 12261 | 8011 | 7314 | 5391 | 4021 | 4845 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | on | cross- off | on | on | glass | cross- on | cross- on | cross | cross- on | cross- on | cross- on | cross | cross- on | cross | cross- on | cross- on | cross- off | cross | cross- on | cross- off | cross | cross- on | cross- off | cross | cross- on | cross- off | cross | cross- on | cross- off | cross | cross | cross- off | cross |
High Tide / height (m) | 8:20PM 1.76 | 7:32AM 1.76 | 8:52PM 1.75 | 8:17AM 1.71 | 9:25PM 1.74 | 9:07AM 1.62 | 10:00PM 1.71 | 10:07AM 1.51 | 10:39PM 1.67 | 11:24AM 1.41 | 11:23PM 1.62 | 1:07PM 1.37 | 12:19AM 1.59 | 2:57PM 1.42 | 1:28AM 1.57 | 4:19PM 1.54 | 2:41AM 1.60 | 5:16PM 1.65 | 3:46AM 1.67 | 6:00PM 1.73 | 4:42AM 1.74 | 6:38PM 1.78 | 5:31AM 1.80 | |||||||||||||
Low Tide / height (m) | 1:55AM 0.84 | 2:12PM 0.17 | 2:35AM 0.78 | 2:49PM 0.28 | 3:21AM 0.73 | 3:28PM 0.44 | 4:12AM 0.67 | 4:11PM 0.62 | 5:12AM 0.62 | 5:03PM 0.82 | 6:24AM 0.55 | 6:14PM 1.01 | 7:43AM 0.45 | 7:51PM 1.12 | 8:57AM 0.32 | 9:24PM 1.14 | 10:01AM 0.19 | 10:31PM 1.10 | 10:54AM 0.09 | 11:21PM 1.03 | 11:42AM 0.02 | 12:03AM 0.95 | ||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Fri 25 | ||||||||||||||||||||||||
| Sunrise | - | - | 5:03 | - | - | 5:05 | - | - | 5:05 | - | - | 5:05 | - | - | 5:07 | - | - | 5:07 | - | - | 5:07 | - | - | 5:09 | - | - | 5:09 | - | - | 5:09 | - | - | 5:11 | - | - | 5:11 |
| Sunset | 7:15 | - | - | 7:15 | - | - | 7:15 | - | - | 7:15 | - | - | 7:15 | - | - | 7:14 | - | - | 7:14 | - | - | 7:13 | - | - | 7:13 | - | - | 7:12 | - | - | 7:10 | - | - | 7:10 | - | - |
 |  | | | |  | | | | |  | | | |  | |  | | | |  | |  | | | | | | | |  | | | | | | |
Rain (mm) | 5 | 8 | 23 | 10 | 4 | - | 3 | 14 | 2 | 4 | 6 | 73 | 90 | 74 | 7 | 3 | 13 | 5 | 4 | 2 | - | - | - | - | 1 | - | - | 1 | - | - | - | - | - | 1 | 1 | 2 |
| Temp. °C | 28 | 26 | 26 | 27 | 26 | 28 | 28 | 25 | 28 | 28 | 26 | 26 | 25 | 25 | 26 | 27 | 26 | 27 | 28 | 25 | 28 | 29 | 25 | 29 | 30 | 26 | 31 | 30 | 26 | 29 | 29 | 26 | 29 | 29 | 26 | 29 |
| Feels °C (?) | 31 | 29 | 28 | 30 | 30 | 32 | 30 | 29 | 31 | 32 | 29 | 30 | 26 | 27 | 29 | 31 | 29 | 31 | 32 | 28 | 31 | 31 | 28 | 32 | 32 | 29 | 32 | 30 | 29 | 31 | 31 | 29 | 32 | 32 | 28 | 30 |
Short Range Forecast: Heavy rain (total 69mm), heaviest during Mon morning. Warm (max 28°C on Sun afternoon, min 24°C on Tue night). Wind will be generally light. | Days 3-6 Weather Summary Heavy rain (total 275mm), heaviest during Thu morning. Warm (max 28°C on Wed afternoon, min 24°C on Fri night). Winds decreasing (fresh winds from the S on Thu morning, light winds from the E by Fri night). | Days 6-9 Weather Summary Light rain (total 7mm), mostly falling on Sat afternoon. Warm (max 31°C on Tue morning, min 24°C on Sat night). Wind will be generally light. | Long Range Forecast: Light rain (total 6mm), mostly falling on Tue afternoon. Warm (max 30°C on Tue afternoon, min 25°C on Tue night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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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 Monabe Rivermouth 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 Monabe Rivermouth Surf forecast
The above surf forecast table for Monabe Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Monabe Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Monabe Rivermouth 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 (Monabe Rivermouth) 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 Monabe Rivermouth 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.
Monabe Rivermouth is 11 km (7 miles) from the city of Aki. If you plan a holiday in Shikoku, look for hotels and other accommodation in Aki. Aki has rooms for a wide range of budgets as well as car hire and transport links.
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