Surf spot

Shirahama

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

Country: Japan, Kanagawa Chiba
Coordinates: 34.6895, 138.9726

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)	0.7	0.7	0.7	0.7	0.7	0.8	0.7	0.7	0.7	0.7	0.7	0.7	0.7	0.6	0.8	0.9	0.9	0.9	0.9	0.9	0.9	0.8	0.7	0.7	0.7	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.7	0.7	0.6	0.7	0.7	0.7	0.6	0.8	0.7	1.1	0.9	0.7	0.8	0.8	1.1	1.3	1.5	1.9	1.9	2	2.1	2.1	2.1	2
Wave direction	ESE	ESE	ESE	ESE	ESE	ESE	ESE	E	ESE	ESE	ESE	ESE	ESE	ESE	SE	SE	SSE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	ESE	SE	SE	ESE	ESE	ESE	ESE	ESE	E	E	E	E	E	E	E	E	E	ESE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE
Wave period (s)	9	8.7	8.8	8.4	8	7.5	8.1	8.4	7.5	7.4	7.3	7.3	8.8	8.3	5.8	5.5	5.6	5.7	5.7	5.8	5.7	5.9	6.2	6.1	6.3	6.3	6.3	6.2	7	6	6.2	7.6	5.5	5.8	6.3	7.2	7.3	8.1	8.6	8.2	8.2	7.3	7.6	8.8	8.4	10.8	11.3	10.8	9.4	10.1	9.3	9.1	8.8	8.4	8.3	8.1
Wave energy (kJ)	71	66	67	69	66	71	68	70	50	57	52	53	77	56	42	47	49	55	52	54	49	47	39	34	35	30	30	28	33	27	29	39	31	33	27	48	53	60	50	81	70	118	102	81	100	141	284	382	381	706	651	629	670	618	578	546
Wind speed (km/h)	10.6	8.3	8.1	9.5	12.3	7.9	2.5	4.2	7	8.5	6.6	9.4	13.5	13.6	14.1	10.9	10.2	8.2	9.4	9	11.2	11.1	7.8	5.1	6.5	9.5	8.7	8.2	10	11.5	11.8	12.7	12.4	14	15.8	16.3	16.7	19.5	20.9	21	22.5	23	23.8	28.4	29.5	27.7	27	23	19.5	19.3	20.9	19.5	18.2	16.1	17.4	16.1
Wind direction	NNECross-on	NECross-on	NNECross-on	ENEOnshore	EOnshore	ESECross-on	SGlassy	WNWGlassy	NWCross-off	NWCross-off	WNWCross-off	SSWCross-off	SSWCross-off	WSWOffshore	WOffshore	WOffshore	WNWCross-off	WSWOffshore	WOffshore	WOffshore	WOffshore	WSWOffshore	WNWOffshore	NCross	NCross	NNECross-on	NNECross-on	NNECross-on	NECross-on	NECross-on	NECross-on	NECross-on	NNECross-on	NNECross-on	NECross-on	NECross-on	NNECross-on	NNECross-on	NECross-on	NNECross-on	NNECross-on	NNECross-on	NNECross-on	NECross-on	NECross-on	NECross-on	NECross-on	NNECross-on	NNECross-on	NNECross-on	NNECross-on	NNECross-on	NNECross-on	NNECross-on	NNECross-on	NNECross-on

Shirahama is a well-known surf area in Japan, commonly referring to the coast in Chiba Prefecture—especially around Shirahama (Nanboku / Minamiboso area)—rather than Kanagawa.

Shirahama surf spot description

Location: Pacific coast of Chiba, facing open ocean
Wave type: Beach break with some reef/point influences nearby depending on the exact section
Best swell: Picks up east to southeast swells well, and can also work with typhoon-generated surf
Wind: Best with offshore or light northwesterly winds; onshore winds can make it messy quickly
Wave quality: Can offer fun, punchy waves when conditions line up, but it is generally more exposed and variable than more protected bays
Crowds: Can get busy on good surf days, especially on weekends and during typhoon season
Best season: Often best from late summer through autumn when typhoons bring stronger swells, though it can surf year-round
Water temperature: Mild to warm in summer; wetsuit needed in winter

What it’s like

Shirahama is a scenic surf area with a more relaxed coastal feel. The waves can be playful on smaller days and more powerful when offshore storms send in bigger swell. Because it is an exposed coastline, conditions can change fast with tide, wind, and swell direction.