Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 am 10 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) - 4ft (1.2m), 6s period with E swell.
Afternoon surf: Afternoon surf (10 Sep, local time) - 3.5ft (1.0m), 6s period with E swell.
Evening surf: Evening surf (10 Sep, local time) - 3.5ft (1.0m), 5s period with E swell.

The current surf forecast for Katahama at 6AM is: 1.1m 5s primary swell from a East direction and 0.3m 15s secondary swell from a East-southeast direction (forecast issued at 02:00am September 10). An open ocean swell of 1.7m 8s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & Date	Wave Height	Wave Period
Morning (10 Sep)	4ft (1.2m)	6s
Afternoon (10 Sep)	3.5ft (1.0m)	6s
Evening (10 Sep)	3.5ft (1.0m)	5s

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

	Short Range Forecast Heavy rain (total 32mm), heaviest during Fri morning. Warm (max 24°C on Sat night, min 20°C on Thu afternoon). Wind will be generally light.
	Thursday 10								Friday 11								Saturday 12
	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	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	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	E 16	E 16	E 5	E 6	ESE 15	E 6	ESE 15	E 5	E 5	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14	E 14	E 14	ESE 14	ESE 14	ESE 14	ESE 14	E 14	ESE 13
Wave Graph
kJ	21	20	64	96	43	78	42	56	67	68	64	63	67	68	67	63	94	94	145	149	147	149	134	139
Wind (km/h)	E	ENE	NE	NE	NE	NE	NE	NE	NE	NE	ENE	ENE	NE	NE	E	NE	NE	NE	NE	NE	NE	NE	NE	NE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-on	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross-on	cross	cross	cross	cross	cross	cross	cross	cross	cross
High Tide			4:20AM1.61m				5:12PM1.68m				4:56AM1.67m				5:31PM1.72m				5:30AM1.71m				5:51PM1.76m
Low Tide	10:52PM0.87m				10:53AM0.46m				11:15PM0.76m				11:19AM0.48m				11:38PM0.64m				11:44AM0.52m


	—	5:24	—	—	—	—	—	—	—	5:26	—	—	—	—	—	—	—	5:26	—	—	—	—	—	—
	—	—	—	—	—	—	6:01	—	—	—	—	—	—	—	6:00	—	—	—	—	—	—	5:59	—	—
mm	1	2	—	—	—	—	3	2	—	—	3	1	5	5	5	2	1	1	1	2	1	—	—	—
Temp °C	24	23	23	23	23	22	20	21	21	21	20	21	21	21	22	22	21	21	22	22	22	23	23	23
Feels °C	27	24	23	23	22	22	20	21	21	22	21	23	23	24	25	24	22	22	23	23	23	25	24	24
Swell 1 Height (m) Direction Period (s)	S 9	SSW 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	S 8	SSW 8	SSW 8	SSW 7	SSW 7	SSW 7	ESE 14	SSW 7	ESE 13
kJ	828	676	422	316	228	187	153	124	95	93	93	74	72	72	72	72	58	58	57	42	41	149	26	139
Swell 2 Height (m) Direction Period (s)	E 16	ESE 10	ESE 15	ESE 15	ESE 15	ESE 15	ESE 15	ESE 15	ESE 16	ESE 14	E 8	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14	E 14	E 14	ESE 14	ESE 14	ESE 14	SSW 7	E 14	SSW 7
kJ	21	19	45	21	43	42	42	47	48	68	20	63	67	68	67	63	94	94	145	149	147	38	134	26
Swell 3 Height (m) Direction Period (s)	E 16	E 16	ESE 11	ESE 11	SE 11	ESE 11	ESE 11	ESE 11	SE 10	E 8	ESE 14	E 8	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	—	—	—	SE 9	SE 9	S 9
kJ	21	20	11	12	5	11	11	11	15	20	64	11	18	19	19	19	18	19	—	—	—	20	20	2
Wind waves Height (m) Direction Period (s)	—	E 4	E 5	E 6	E 6	E 6	E 6	E 5	E 5	E 5	E 5	E 4	E 4	E 4	E 3	E 3	E 4	E 5	E 5	E 5	E 5	E 5	E 5	E 5
kJ	—	19	64	96	92	78	76	56	67	43	30	19	12	7	6	5	32	37	27	27	29	29	22	29
Nearest Offshore or Glassy	Kugenuma Rivermouth Kanagawa	Omaezaki Shizuoka	Omaezaki Shizuoka	Akabane Long Beach Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Sakawa River Kanagawa	Omaezaki Shizuoka	Mera Chiba	Keta Reef Oshima Izu Islands	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Mera Chiba	Mera Chiba	Mera Chiba	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka
Rating (10 max)	2	3	2	2	2	2	2	1	1	1	1	1	1	1	1	2	2	2	2	1	1	2	1	1
Distance (km)	132	13	13	94	13	13	13	13	103	13	150	104	13	13	13	150	150	150	13	13	13	13	13	13
Best forecast wave conditions in Shizuoka		Akabane Long Beach	Akabane Long Beach	Akabane Long Beach	Omaezaki	Omaezaki	Omaezaki	Omaezaki		Omaezaki			Omaezaki	Omaezaki	Omaezaki				Omaezaki	Omaezaki	Omaezaki	Omaezaki	Omaezaki	Omaezaki
Rating (10 max)		3	2	2	2	2	2	1		1			1	1	1				2	1	1	2	1	1
Best forecast wave conditions in Japan	Niyodo Rivermouth Shikoku	Akabane Long Beach Shizuoka	Akabane Long Beach Shizuoka	Akabane Long Beach Shizuoka	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Omaezaki Shizuoka	Kamogawa Chiba	Big Ben Chiba	Kuminatu Chiba	Matsube Bay Chiba	Niyodo Rivermouth Shikoku	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Amatu Chiba	Big Ben Chiba	Big Ben Chiba	Big Ben Chiba	Amatu Chiba	Amatu Chiba	Niyodo Rivermouth Shikoku
Rating (10 max)	2	3	2	2	2	2	2	2	3	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2
Header Global	Etang-Sale Reunion	Papatowai New Zealand	Kaka Point 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	Shingles New Zealand	Antiques Maldives	Trial Harbour Australia	Easter Reef Australia	Trial Harbour Australia	Trial Harbour Australia	Trial Harbour Australia	Trial Harbour Australia	Easter Reef Australia	Shipwrecks Bay-Peaks New Zealand	Shipwreck Bay-Supertubes New Zealand	White Rock - The Spit New Zealand
Rating (10 max)	8	7	9	6	5	5	9	8	8	9	9	9	7	5	9	9	9	9	9	9	5	7	7	7

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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