Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 am 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 (09 Sep):

Morning surf: Morning surf (09 Sep, local time) - 1ft (0.3m), 10s period with ESE swell.
Afternoon surf: Afternoon surf (09 Sep, local time) - 0.5ft (0.2m), 17s period with E swell.
Evening surf: Evening surf (09 Sep, local time) - 0.5ft (0.2m), 16s period with E swell.

The current surf forecast for Katahama at 11AM is: 0.2m 17s primary swell from a East direction and 0.3m 10s secondary swell from a East-southeast direction (forecast issued at 02:00am September 09). An open ocean swell of 3.0m 9s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & Date	Wave Height	Wave Period
Morning (09 Sep)	1ft (0.3m)	10s
Afternoon (09 Sep)	0.5ft (0.2m)	17s
Evening (09 Sep)	0.5ft (0.2m)	16s

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

	Short Range Forecast Heavy rain (total 55mm), heaviest during Fri afternoon. Warm (max 28°C on Wed morning, min 20°C on Thu morning). Wind will be generally light.
	Wednesday 9								Thursday 10								Friday 11
	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	1	0	0	1	0	0
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	SE 10	ESE 10	ESE 10	ESE 10	E 17	E 17	E 16	E 16	E 16	ENE 4	E 5	E 6	ESE 15	E 6	E 6	E 6	E 6	E 6	S 8	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14
Wave Graph
kJ	25	19	32	18	23	22	21	21	21	32	59	62	43	102	99	92	92	68	92	63	67	68	66	63
Wind (km/h)	SW	SW	SW	SW	SW	SW	SSW	SSW	NE	ESE	NE	NE	NE	NE	NE	NE	NE	NE	NE	ENE	NE	ENE	ENE	NE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross	cross	cross	cross	cross	cross	cross-on	glassy	cross	on	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	glassy	cross	cross
High Tide			3:41AM1.53m				4:55PM1.64m				4:20AM1.61m				5:12PM1.68m				4:56AM1.67m				5:31PM1.72m
Low Tide	10:29PM0.99m				10:23AM0.46m				10:52PM0.87m				10:53AM0.46m				11:15PM0.76m				11:19AM0.48m


	—	5:24	—	—	—	—	—	—	—	5:24	—	—	—	—	—	—	—	5:26	—	—	—	—	—	—
	—	—	—	—	—	—	6:02	—	—	—	—	—	—	—	6:01	—	—	—	—	—	—	—	6:00	—
mm	10	9	7	5	4	4	5	2	—	1	1	2	5	2	2	—	1	1	—	1	2	6	2	1
Temp °C	27	26	26	27	28	28	27	25	23	23	22	22	20	20	20	21	21	21	22	21	21	21	22	22
Feels °C	28	28	29	29	29	30	30	30	26	26	22	22	20	19	19	20	20	21	23	23	24	24	25	24
Swell 1 Height (m) Direction Period (s)	E 9	ESE 10	ESE 10	ESE 10	ESE 10	E 17	E 16	SSW 9	SSW 9	S 8	SSW 8	S 8	S 8	S 8	S 8	S 8	S 8	S 8	S 8	S 8	S 7	S 7	S 7	SSW 8
kJ	13	19	32	18	18	22	21	1106	819	632	412	302	228	187	157	127	95	93	92	90	108	131	108	94
Swell 2 Height (m) Direction Period (s)	SE 10	SE 12	E 18	E 17	E 17	SE 12	—	E 16	ESE 10	ESE 10	ESE 15	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	25	6	6	6	23	6	—	21	19	10	45	21	43	42	42	47	48	68	64	63	67	68	66	63
Swell 3 Height (m) Direction Period (s)	E 18	E 18	E 18	SE 12	SE 12	—	—	E 16	E 16	E 16	ESE 11	ESE 11	ESE 11	ESE 11	ESE 11	ESE 11	SE 10	ESE 10	SE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10
kJ	6	6	6	6	6	—	—	21	21	20	11	11	12	12	11	11	17	9	15	9	18	18	18	19
Wind waves Height (m) Direction Period (s)	S 10	S 10	S 10	SSW 9	SSW 9	SSW 9	S 9	—	—	ENE 4	E 5	E 6	E 6	E 6	E 6	E 6	E 6	E 6	E 6	E 5	E 5	E 5	E 4	E 4
kJ	1446	1565	1432	1487	1477	1331	1285	—	—	32	59	62	106	102	99	92	92	64	49	26	18	11	10	31
Nearest Offshore or Glassy	Hashikui Bay Shikoku	Monabe Rivermouth Shikoku	Suruga Bay Shizuoka	Hashikui Bay Shikoku	Teba Shima Shikoku	Choshi Chiba	Sakawa River Kanagawa	Suruga Bay Shizuoka	Susuki Shizuoka	Akabane Long Beach Shizuoka	Omaezaki Shizuoka	Akabane Long Beach Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Suruga Bay Shizuoka	Sakawa River Kanagawa	Sakawa River Kanagawa
Rating (10 max)	4	2	4	4	3	4	4	4	1	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1
Distance (km)	355	430	2	355	369	260	103	2	6	94	13	94	13	13	13	13	13	13	13	13	13	2	103	103
Best forecast wave conditions in Shizuoka			Suruga Bay					Suruga Bay	Omaezaki	Akabane Long Beach	Akabane Long Beach	Akabane Long Beach	Omaezaki	Omaezaki	Omaezaki	Omaezaki	Omaezaki	Omaezaki	Omaezaki	Omaezaki	Omaezaki	Omaezaki
Rating (10 max)			4					4	3	2	2	2	2	2	2	1	1	1	1	1	1	2
Best forecast wave conditions in Japan	Yasuda Rivermouth Shikoku	Dragons Leaf Kyu Shu	Suruga Bay Shizuoka	Takegashima Shikoku	Kaifu Rivermouth Shikoku	Choshi Chiba	Matsube Bay Chiba	Chikura Chiba	Omaezaki Shizuoka	Akabane Long Beach Shizuoka	Akabane Long Beach Shizuoka	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Big Ben Chiba	Niyodo Rivermouth Shikoku	Matsube Bay Chiba	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands
Rating (10 max)	5	3	4	4	3	4	4	4	3	2	2	2	2	2	2	2	1	1	2	2	2	2	2	2
Header Global	Gas Bay Australia	Saint Leu Reunion	Cobblestones Australia	Saint Leu Reunion	Saint Leu Reunion	Saint Leu Reunion	Saint Leu Reunion	Saint Leu Reunion	Saint Leu Reunion	Etang-Sale Reunion	Papatowai New Zealand	Saint Leu Reunion	Saint Leu Reunion	Dunedin - Bobs Beach New Zealand	Blaketown Wedge New Zealand	Easter Reef Australia	Fox River New Zealand	Trial Harbour Australia	Trial Harbour Australia	Trial Harbour Australia	Blaketown Wedge New Zealand	Blaketown Wedge New Zealand	Tessellated Pavements Australia	Trial Harbour Australia
Rating (10 max)	7	9	6	9	9	9	9	9	7	7	9	6	5	9	5	7	8	8	9	9	5	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 (09 Sep):

Short Range Forecast

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