Surf spot

Kaifu Rivermouth

Forecast conditions and map view for Kaifu Rivermouth in Japan, Shikoku. Open the interactive surf map to inspect wind, waves, and nearby spots.

Country: Japan, Shikoku
Coordinates: 33.5945, 134.3638

Metric
Metric	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00
Wave height (m)	0.6	0.6	0.6	0.7	0.7	0.6	0.7	0.5	0.7	0.9	0.9	0.9	0.9	1	1	1.1	1.2	1.2	1.2	1.2	1.2	1.2	1.1	1	1	1	1	1	0.9	0.9	0.9	0.8	0.8	0.8	0.8	0.8	0.8	0.9	1	1.1	1.3	1.4	1.4	1.4	1.4	1.5	1.5	1.5	1.8	2.1	3	3.1	3.1	3	3	2.5
Wave direction	ESE	ESE	ESE	ESE	SE	SE	SE	SE	ESE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	SE	ESE	ESE	ESE	ESE	SE	ESE
Wave period (s)	8.6	9.6	9.2	8.6	7.7	5.4	5.5	6.6	5.7	5.3	5.3	5.3	5.5	6.6	6.8	6.8	7	7	6.9	6.8	6.8	6.8	6.9	7	7	7.1	7.2	7.2	7.2	7.2	7.3	7.3	7.3	7.3	7.2	7.3	7	6.7	6.3	6.2	6	6.1	6.3	6.5	6.8	6.8	6.9	6.8	11.4	11.8	9.8	9.7	9.7	9.3	9.2	8
Wave energy (kJ)	56	61	64	64	61	20	26	24	28	42	46	51	50	84	92	106	132	143	146	144	133	126	115	106	108	101	98	94	88	84	78	74	72	67	66	64	63	68	83	96	123	154	163	163	189	200	214	197	812	1241	1746	1785	1813	1540	1547	765
Wind speed (km/h)	2.3	1.1	2.8	2.6	9.7	9.3	3.8	3.1	2.2	4.8	5.6	4.3	13	12.3	5.5	5.2	3.8	1.6	3.8	2.1	4.3	8.7	1.1	4.6	5.1	2.3	3.9	1.8	8.2	5.3	0.4	5	5.2	5.6	5.4	4	6.5	5.1	3.4	3.1	3.2	3.2	3.9	2.6	8.5	8.2	2.7	4.3	4.7	7	6.6	7.4	5.9	9.5	3.8	5.9
Wind direction	ESEGlassy	NGlassy	NWGlassy	SSEGlassy	SECross	SECross	SEGlassy	NWGlassy	WGlassy	NWGlassy	NWCross	SGlassy	SSECross-off	SCross-off	SSWOffshore	WNWCross-off	WNWGlassy	SSEGlassy	WNWGlassy	NNWGlassy	ESEGlassy	SECross	SSEGlassy	NWGlassy	NWCross	WNWGlassy	NNWGlassy	EGlassy	SECross	SSECross	EGlassy	WNWCross-off	WNWCross-off	NWCross	NWCross	EGlassy	ENEOnshore	ECross-on	NNEGlassy	NEGlassy	ENEGlassy	NNEGlassy	NWGlassy	ENEGlassy	ESECross-on	SECross	SSWGlassy	NWGlassy	WNWGlassy	NWCross-off	NNWCross	ENEOnshore	EOnshore	ESECross-on	NNWGlassy	NCross-on

Kaifu Rivermouth (Kaifu-gawa mouth), Shikoku, Japan is a river-mouth surf spot on the southern coast of Tokushima Prefecture, known for its scenic, relatively uncrowded setup and playful, rippable waves when conditions align.

What it’s like

Wave type: Sandbar/river-mouth break with shifting peaks
Best for: Intermediate to advanced surfers, though smaller days can suit improving surfers
Style: Can offer clean, fun right and left peaks, with the river mouth helping shape the sand and wave line
Crowds: Usually less crowded than Japan’s better-known surf areas, but it can still draw locals and travelers when conditions are good

Conditions

Best swell direction: Typically works well with incoming swell from the Pacific/East/Southeast
Wind: Best with light offshore winds; onshore winds can quickly make it messy
Tide: Tide sensitivity can be important at river-mouth spots; the sandbar and current can change the shape a lot

Environment

Scenery: Lush, natural coastline with a more relaxed, rural feel than major surf towns
Water: Generally clean but can be affected by river runoff after rain
Character: A dynamic spot—banks can shift after storms, so the wave quality can vary from session to session

Things to keep in mind

Currents: River mouths can have strong currents and rip flows, especially after rain or during bigger surf
Changing banks: The best peak may move around
Local knowledge helps: Conditions can be subtle, so checking with local surfers or surf shops is useful

Overall

Kaifu Rivermouth is a scenic, fun, and often underrated surf spot in Shikoku, especially appealing if you like exploring less crowded breaks and don’t mind that the setup can change with the sand and river flow.