Kaifu Rivermouth Surf Forecast

/ Shikoku (17 surf breaks) /

Japan (129 surf breaks)

Surf Forecasts:

Kaifu Rivermouth surfForecast / Shikoku / Japan

12 Day Weather and Surf, issued 8 am Friday 19 Sep 2025 JST

Forecast 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 27.7° C
(Which is 1.2°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Kaifu Rivermouth this week:

The surf forecast for Kaifu Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 20) at 3AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.6m and 4s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Kaifu Rivermouth in the next 12 days are 3.0m 9s and forecast to arrive on Tuesday (Sep 23) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Monday (Sep 22) at 12PM.

Wave Type	Time (JST) & Date	Wave Height & Period
Next good surf (1 star+)	3AM (Sat 20th Sep)	2ft (0.6m) 9s
Best Surf	6PM (Mon 22nd Sep)	3.5ft (1.0m) 12s
Most Powerful	6PM (Tue 23rd Sep)	10ft (3.0m) 9s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 5mm), mostly falling on Sun morning. Warm (max 28°C on Sat morning, min 20°C on Sun night). Wind will be generally light.									Days 3-6 Weather Summary Heavy rain (total 86mm), heaviest during Wed night. Warm (max 26°C on Mon morning, min 22°C on Mon night). Wind will be generally light.
	Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24			Thursday 25
	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	0	0	0	0	0	1	0	2	0	0	2	0	0	0	0	0	2
Swell Height Map See all maps
Wave Height (m) & direction (?)	SE	SE	ESE	ESE	ESE	SE	SE	SE	ESE	S	S	S	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	SSW
Period(s) (?)	10	9	9	9	9	9	11	11	10	15	13	12	8	9	9	8	8	9	8	8	10
Wave Graph (?)
kJ (?)	44	41	32	82	47	22	30	30	38	215	506	432	768	858	1317	1413	845	396	147	96	240
Wind (km/h)	NNE	NE	NW	SSE	SSW	WSW	NNE	NE	N	NNE	NE	ENE	E	E	E	SE	SE	SSE	S	SW	WSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross	off	cross- on	cross	cross- off	cross	cross	cross- off	cross- off	cross	cross	cross- on	cross- on	cross- on	on	on	on	cross- on	cross	cross- off
High Tide / height (m)		5:08PM 1.70		4:40AM 1.69	5:30PM 1.74		5:19AM 1.77	5:51PM 1.77		5:54AM 1.81		6:11PM 1.79	6:28AM 1.81		6:31PM 1.79	7:01AM 1.78		6:51PM 1.77	7:34AM 1.71		7:10PM 1.73
Low Tide / height (m)	10:31AM 0.31		10:56PM 0.75	11:06AM 0.30		11:24PM 0.60	11:36AM 0.32		11:51PM 0.48		12:04PM 0.38	12:18AM 0.38		12:30PM 0.47	12:44AM 0.32		12:55PM 0.57	1:12AM 0.29		1:19PM 0.69	1:40AM 0.30

	Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24			Thursday 25
Sunrise	5:47	-	-	5:48	-	-	5:48	-	-	5:48	-	-	5:50	-	-	5:50	-	-	5:50	-	-
Sunset	-	6:04	-	-	6:02	-	-	6:01	-	-	6:00	-	-	5:59	-	-	5:57	-	-	5:55	-

Rain (mm)	-	-	-	-	-	1	3	1	-	-	-	2	5	6	20	14	13	26	6	3	-
Temp. °C	27	26	25	28	28	25	26	27	22	26	26	23	22	22	24	25	25	25	25	26	25
Feels °C (?)	28	28	29	31	30	28	30	30	21	23	24	24	21	22	25	25	25	26	27	30	29

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Shikoku

Wind Update Still cross-shore at Kaifu Rivermouth (fresh winds from the ENE at Murotomisaki(47899-0) 41 km from Kaifu Rivermouth). 0.4m 9s swell from the SE with a 0.1m 11s groundswell from the ESE. 2 swells combining to make bigger set waves.
2 hours 13 minutes ago Kaifu Rivermouth

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41 km away, 2 h 13 min ago

35 km/h

ENE

0.0

27.7

Air / Water (°C)

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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 12 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.