Surf spot

Sakawa Rivermouth

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

Country: Japan, Kanagawa Chiba
Coordinates: 35.2598, 139.1836

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)	0.3	0.3	0.3	0.4	0.4	0.4	0.3	0.4	0.4	0.5	0.4	0.5	0.5	0.5	0.6	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.6	0.6	0.6	0.6	0.5	0.5	0.4	0.4	0.4	0.4	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.5	0.7	1	1.4	1.6	1.6	1.6	1.6	1.6	1.6	1.5	1.5
Wave direction	SE	SE	SSE	SSE	SSE	SE	SSE	SSE	SSE	SE	SE	SSE	SSE	SE	SE	SE	SSE	SSE	SSE	SE	SE	SE	SE	SE	SSE	SSE	SSE	SSE	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
Wave period (s)	6.3	5.5	5.5	6	5.5	5.9	5.6	5.5	5.3	5.3	5.3	5	5.3	6.8	6	6.4	6.3	6	6.2	6.2	6.3	6.3	6.1	6	6	5.9	6	6	6.2	6.3	6.2	6.2	6.5	6.5	6.7	6.8	7	7.2	7	6.7	7.2	7	7	14.2	13.5	12.9	12.1	11.1	10.3	10.1	9.8	9.3	9.3	8.9	8.7	8.4
Wave energy (kJ)	9	6	7	11	8	10	7	9	10	12	11	10	12	25	25	36	35	35	35	33	34	35	32	34	35	30	31	29	29	26	24	21	18	17	16	14	13	11	9	8	9	7	7	36	99	184	314	465	516	530	522	432	438	390	350	301
Wind speed (km/h)	6.6	5.5	4.7	5.2	8.7	12.1	8.3	5	7.6	9	9.5	10.6	19.6	17.2	13.8	10	9.7	7.6	8	5.2	5.8	4.6	3.2	8.7	7.7	8.2	8.8	7.9	11	8.4	10.1	8.8	9.9	9.1	11.3	12.6	13.4	12.4	12.9	13.3	15.2	15.1	15.5	20.8	23.4	19.5	16.7	14.1	14.8	15.5	14	13.8	13	13.2	12.8	9.7
Wind direction	NNECross	NCross	NNEGlassy	NNECross-on	SECross-on	SSECross-on	SCross	WSWOffshore	WOffshore	WNWOffshore	WOffshore	SSWCross-off	SCross	SSWCross-off	WSWOffshore	WSWOffshore	WOffshore	WSWCross-off	WOffshore	WSWOffshore	WOffshore	SSEGlassy	EGlassy	NCross	NCross	NNECross-on	NNECross-on	NECross-on	NECross-on	NECross-on	NECross-on	NNECross-on	NNECross-on	NCross	NNECross-on	NNECross-on	NNECross-on	NNECross-on	NNECross-on	NCross	NCross	NCross	NCross	NCross	NNECross-on	NNECross	NNECross	NNECross-on	NCross	NCross	NCross	NCross	NCross	NCross	NCross	NCross

Sakawa Rivermouth, Kanagawa/Chiba area

Sakawa Rivermouth is a river-mouth surf break on Japan’s Pacific coast, known for sandbar-driven waves that can change a lot with tides, swell direction, and river flow. Like many rivermouth spots, it can produce peaky, punchy beachbreak-style waves when the sand lines up, with sections that may open up into longer rides on the right swell.

Wave character:
- Mostly sandbar / rivermouth beachbreak
- Can offer fast, hollow, and punchy waves
- Best on consistent Pacific swell with favorable winds
- Conditions can shift quickly after storms or changes in the river mouth

Best for:
- Intermediate to advanced surfers when it’s working well
- Surfers looking for a more dynamic, less predictable setup
- Shortboarders on good swells, though bigger boards may help on smaller days

Things to watch:
- Strong currents near the river mouth
- Shifting sandbanks and breaking zones
- Water quality can vary after rain due to river runoff
- Crowd levels may increase when conditions are good