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Surf Forecasts:
Kaifu Rivermouth surfForecast / Shikoku / Japan
16 Day Weather and Surf, issued 2 pm Monday 20 Apr 2026 JSTForecast update in hr min s Forecast update imminent
Kaifu Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kaifu Rivermouth sea temperature is
18.9° C
(Which is normal for this time of year)Best Forecast Surf Conditions for Kaifu Rivermouth this week:
The surf forecast for Kaifu Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Apr 20) at 9PM. The primary swell is predicted to be 1.6m and 12s period with a secondary swell of 1.1m and 6s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kaifu Rivermouth in the next 16 days are 1.7m 12s and forecast to arrive on Tuesday (Apr 21) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Monday (Apr 27) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 20th Apr) | 5ft (1.6m) 12s |
| Best Surf | 9PM (Mon 20th Apr) | 5ft (1.6m) 12s |
| Most Powerful | 12AM (Tue 21st Apr) | 5.5ft (1.7m) 12s |
Table - best surf conditions forecast for Kaifu Rivermouth over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 22mm), heaviest during Thu morning. Warm (max 20°C on Tue afternoon, min 11°C on Thu morning). Wind will be generally light. | Days 3-6 Weather Summary Heavy rain (total 52mm), heaviest during Thu afternoon. Very mild (max 18°C on Sat morning, min 13°C on Thu afternoon). Winds increasing (light winds from the N on Fri morning, fresh winds from the ESE by Sun morning). | ||||||||||||||||||||||
Mon 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||||
| 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) (?) | 13 | 12 | 12 | 11 | 11 | 10 | 10 | 10 | 13 | 13 | 8 | 8 | 9 | 10 | 10 | 10 | 6 | 6 | 7 | 7 | 7 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 1030 | 843 | 560 | 280 | 202 | 139 | 104 | 77 | 61 | 60 | 364 | 300 | 202 | 170 | 128 | 96 | 111 | 115 | 356 | 331 | 211 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- off | cross- off | cross- off | cross- off | glass | glass | cross- off | cross- off | cross | cross- off | cross- off | cross- off | cross- off | cross | on | cross- on | cross- on | on | on | cross- off | ||
High Tide / height (m) | 8:30PM 1.74 | 7:25AM 1.80 | 9:28PM 1.61 | 8:02AM 1.70 | 10:42PM 1.49 | 8:49AM 1.57 | 12:19AM 1.44 | 10:02AM 1.42 | 1:50AM 1.47 | 12:14PM 1.33 | 2:45AM 1.53 | 2:08PM 1.37 | 3:23AM 1.59 | ||||||||||
Low Tide / height (m) | 1:50AM 0.94 | 2:27PM 0.07 | 2:33AM 1.06 | 3:21PM 0.21 | 3:29AM 1.17 | 4:29PM 0.37 | 5:11AM 1.22 | 5:57PM 0.49 | 7:33AM 1.14 | 7:28PM 0.55 | 8:49AM 0.96 | 8:38PM 0.57 | 9:33AM 0.77 | ||||||||||
Mon 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||||
| Sunrise | - | - | 5:26 | - | - | 5:24 | - | - | 5:22 | - | - | 5:22 | - | - | 5:20 | - | - | 5:20 | - | - | 5:18 | ||
| Sunset | 6:36 | - | - | 6:37 | - | - | 6:37 | - | - | 6:37 | - | - | 6:38 | - | - | 6:39 | - | - | 6:40 | - | - | ||
 |  |  |  |  | |  |  |  | | |  |  | | | | | | |  | | |||
Rain (mm) | 4 | 1 | - | - | - | - | - | 1 | 16 | 24 | 5 | 6 | 2 | 1 | - | - | 2 | 12 | 13 | 58 | 3 | ||
| Temp. °C | 19 | 18 | 19 | 20 | 14 | 20 | 19 | 17 | 13 | 13 | 14 | 14 | 15 | 14 | 18 | 16 | 16 | 17 | 17 | 18 | 20 | ||
| Feels °C (?) | 19 | 19 | 13 | 14 | 10 | 17 | 17 | 16 | 11 | 10 | 11 | 14 | 14 | 13 | 15 | 15 | 14 | 13 | 13 | 17 | 21 | ||
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 Kaifu 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 Kaifu Rivermouth Surf forecast
The above surf forecast table for Kaifu Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kaifu Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Kaifu 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 (Kaifu 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 Kaifu 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.
Kaifu Rivermouth is 40 km (25 miles) from Muroto. If you plan a holiday in Shikoku, look for hotels and other accommodation in Muroto. Muroto has rooms for a wide range of budgets as well as car hire and transport links.
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