Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 8 pm 09 Sep 2026 (local time)

Forecast update in hr min

Today's Katahama sea temperature is

27.1°C

Katahama surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Surf Forecasts:

How big are the waves at Katahama today (10 Sep):

Morning surf: Morning surf (10 Sep, local time) - 0.5ft (0.2m), 15s period with ESE swell.
Afternoon surf: Afternoon surf (10 Sep, local time) - 1ft (0.3m), 15s period with ESE swell.
Evening surf: Evening surf (10 Sep, local time) - 1ft (0.3m), 15s period with ESE swell.

The current surf forecast for Katahama at 12AM is: 0.2m 16s primary swell from a East direction (forecast issued at 08:00pm September 09). An open ocean swell of 2.3m 9s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (JST) & Date	Wave Height	Wave Period
Morning (10 Sep)	0.5ft (0.2m)	15s
Afternoon (10 Sep)	1ft (0.3m)	15s
Evening (10 Sep)	1ft (0.3m)	15s

Table - waves today at Katahama. (Swell directed towards the surf break)

	Short Range Forecast Heavy rain (total 74mm), heaviest during Thu afternoon. Warm (max 24°C on Wed night, min 20°C on Thu afternoon). Wind will be generally light.
	Wed 9		Thursday 10								Friday 11
	6 PM	9 PM	12 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	12 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	E 16	E 16	E 16	E 16	E 5	ESE 15	ESE 15	ESE 15	ESE 15	ESE 15	ESE 16	E 6	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14
Wave Graph
kJ	21	21	21	25	83	21	43	42	42	47	48	68	64	63	67	68	67	63
Wind (km/h)	SW	SW	E	ENE	NE	NE	NE	NE	NE	NE	NE	NE	ENE	ENE	NE	NE	NE	NE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross	cross	cross-on	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross
High Tide	4:55PM1.64m				4:20AM1.61m				5:12PM1.68m				4:56AM1.67m				5:31PM1.72m
Low Tide			10:52PM0.87m				10:53AM0.46m				11:15PM0.76m				11:19AM0.48m


	—	—	—	5:24	—	—	—	—	—	—	—	5:26	—	—	—	—	—	—
	6:02	—	—	—	—	—	—	—	6:01	—	—	—	—	—	—	—	6:00	—
mm	3	2	1	1	1	—	—	4	24	6	—	—	3	2	2	8	4	8
Temp °C	27	24	23	23	22	22	21	20	20	20	21	21	21	21	21	21	21	21
Feels °C	30	27	25	24	22	21	19	18	19	20	21	21	22	23	23	23	23	23
Swell 1 Height (m) Direction Period (s)	S 9	S 9	S 9	S 9	SSW 8	S 8	S 8	S 8	S 8	S 8	S 8	S 8	S 8	S 8	S 8	S 8	S 8	SSW 8
kJ	1138	1018	828	663	470	309	228	187	130	124	98	93	74	74	72	72	72	58
Swell 2 Height (m) Direction Period (s)	E 16	E 16	E 16	ESE 10	ESE 10	ESE 15	ESE 15	ESE 15	ESE 15	ESE 15	ESE 16	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14
kJ	21	21	21	19	11	21	43	42	42	47	48	68	64	63	67	68	67	63
Swell 3 Height (m) Direction Period (s)	—	—	E 16	E 16	ESE 15	W 4	SE 11	SE 11	ESE 11	SE 10	SE 10	ESE 10	ESE 10	ESE 9	ESE 10	ESE 10	ESE 10	ESE 10
kJ	—	—	21	20	22	2	5	5	11	16	15	9	10	9	9	19	18	19
Wind waves Height (m) Direction Period (s)	—	—	—	E 4	E 5	E 6	E 6	E 6	E 6	E 6	E 6	E 6	E 6	E 5	E 5	E 4	E 4	E 5
kJ	—	—	—	25	83	124	128	109	95	79	74	64	57	34	20	14	17	47
Nearest Offshore or Glassy	Sakawa River Kanagawa	Kisami-Ohama Beach Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Sakawa River Kanagawa	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Mera Chiba	Mera Chiba	Mera Chiba	Omaezaki Shizuoka	Mera Chiba	Suruga Bay Shizuoka
Rating (10 max)	4	3	3	3	3	2	2	1	1	1	1	1	1	2	2	1	2	1
Distance (km)	103	65	13	13	13	13	13	103	13	13	13	13	150	150	150	13	150	2
Best forecast wave conditions in Shizuoka		Kisami-Ohama Beach	Omaezaki	Akabane Long Beach	Omaezaki	Omaezaki	Omaezaki		Omaezaki	Omaezaki	Omaezaki	Omaezaki				Omaezaki		Suruga Bay
Rating (10 max)		3	3	3	3	2	2		1	1	1	1				1		1
Best forecast wave conditions in Japan	Sakawa River Kanagawa	Mera Chiba	Omaezaki Shizuoka	Akabane Long Beach Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Niyodo Rivermouth Shikoku	Big Ben Chiba	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Niyodo Rivermouth Shikoku	Kaiser's (Hachijojima Island) Izu Islands	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku
Rating (10 max)	4	3	3	3	3	2	2	2	2	2	3	2	2	2	2	2	2	2
Header Global	Saint Leu Reunion	Saint Leu Reunion	Saint Leu Reunion	Papatowai New Zealand	Papatowai New Zealand	Saint Leu Reunion	Nugget Point New Zealand	Dunedin - Bobs Beach New Zealand	Trial Harbour Australia	Fox River New Zealand	Fox River New Zealand	Trial Harbour Australia	Trial Harbour Australia	Trial Harbour Australia	Little Wanganui New Zealand	Koodhoo Maldives	Trial Harbour Australia	Easter Reef Australia
Rating (10 max)	9	9	7	8	9	6	5	5	9	8	8	9	9	9	7	5	9	9

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

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Katahama 48 hour detailed Surf Forecast

How big are the waves at Katahama today (10 Sep):

Short Range Forecast

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