Surf spot

Umegahama rivermouth

Forecast conditions and map view for Umegahama rivermouth in Japan, Kyushu. Open the interactive surf map to inspect wind, waves, and nearby spots.

Country: Japan, Kyushu
Coordinates: 31.5869, 131.4100

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)	0.8	0.7	0.6	0.6	0.6	0.6	0.5	0.5	0.6	0.8	0.8	0.8	0.8	0.8	0.8	0.9	1.1	1.1	1.1	1.1	1.2	1.3	1.3	1.3	1.4	1.4	1.5	1.4	1.4	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.1	1.1	1	1	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.8	0.7	0.7	0.8	1	1.2	1.2	1.5
Wave direction	ENE	ENE	ENE	ENE	ENE	ENE	ENE	E	E	E	E	E	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	E	E	E
Wave period (s)	6.3	6.2	6.2	5.9	5.6	5.5	5.3	11.6	10.6	8	7.8	7.9	7.8	7	5	5.5	5.2	5.5	5.5	5.7	6	6.8	6.9	7.1	7	7.2	7.2	7.3	7.3	6.8	7.5	7.3	7.3	7.3	7.3	7.3	7.2	7.3	7.4	7.2	6.8	6.8	6.8	7	6.9	6.5	6.3	6.3	6.7	6.7	6.7	6.3	5.4	6	7	6.5
Wave energy (kJ)	49	38	31	23	20	19	15	73	75	77	78	76	79	70	34	51	65	76	80	83	97	147	166	181	195	212	218	212	203	129	165	162	151	151	146	143	130	121	118	98	83	82	83	82	81	68	65	64	59	46	47	53	61	99	130	203
Wind speed (km/h)	4.3	5.1	4.7	8.1	10.8	9.6	5.7	4.1	4.3	4.3	5	6.8	11	11.3	5.5	5.4	4.4	5.1	5.4	8.4	11	9.8	3.9	3.1	0	3.8	4.2	3.1	6.1	6.4	5.1	4.8	3.7	5.1	4.6	8.5	9.7	8.9	6.6	6	6.2	6	6.3	10.3	12.9	13.2	9.4	8.7	7.6	9.8	11.3	17.1	16.6	14	8.5	7.3
Wind direction	NGlassy	NOnshore	NGlassy	NECross-on	ENECross-on	ENECross-on	ENECross-on	NNEGlassy	NGlassy	NGlassy	NOnshore	ENECross-on	ECross-on	ECross	ENECross-on	NOnshore	NGlassy	NOnshore	NOnshore	NECross-on	ECross-on	ECross	ESEGlassy	SEGlassy	WGlassy	NNEGlassy	NNEGlassy	NEGlassy	NECross-on	NECross-on	NECross-on	NNEGlassy	NNEGlassy	NOnshore	NNEGlassy	NEOnshore	ENECross-on	NECross-on	NNEOnshore	NNEOnshore	NOnshore	NNEOnshore	NNEOnshore	NEOnshore	NECross-on	NECross-on	NECross-on	NECross-on	NNEOnshore	NNEOnshore	NNEOnshore	NECross-on	NECross-on	NECross-on	NEOnshore	NNEOnshore

Umegahama Rivermouth, Kyushu, Japan is a river-mouth surf spot that can offer fun, shaped waves when the sandbars and river outflow line up well.

What it’s like

Type: Rivermouth / beachbreak
Wave style: Usually punchy and variable, with shifting peaks depending on sand movement and river flow
Best for: Intermediate surfers and above when it’s working cleanly
Mood: Can feel local, quieter, and less crowded than major surf destinations

Conditions to look for

Best swell: Small to medium-sized swell is often more manageable; bigger swells can make it messy or too powerful
Wind: Light offshore winds or very light variable winds are ideal
Tide: Often best around mid tide, but this can change with sandbar position and recent weather
River influence: Heavy rain or strong river discharge can make water murky and affect break shape

Hazards / notes

Shifting sandbars: Peaks and channels can change quickly
Current: River-mouth currents and rips can be strong
Water quality: After rain, runoff can affect clarity and cleanliness
Local conditions: Check with local surfers or recent reports before paddling out

Overall

Umegahama Rivermouth is the kind of spot that can be very good when everything aligns: a clean swell, favorable wind, and stable sandbars. It’s typically more of a conditional, shape-dependent beachbreak than a consistent all-time wave.