Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 8 am 19 Sep 2026 (local time)

Forecast update in hr min

Today's Katahama sea temperature is

25.8°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 (19 Sep):

Morning surf: Morning surf (19 Sep, local time) - 8ft (2.5m), 16s period with SE swell.
Afternoon surf: Afternoon surf (19 Sep, local time) - 10ft (3.0m), 14s period with SE swell.
Evening surf: Evening surf (19 Sep, local time) - 10ft (3.0m), 13s period with SE swell.

The current surf forecast for Katahama at 12PM is: 3.0m 14s primary swell from a Southeast direction (forecast issued at 08:00am September 19). An open ocean swell of 2.4m 8s is not directed at the surf break. The wind direction is predicted to be cross-shore and the swell rating is 11.

Time (JST) & Date	Wave Height	Wave Period
Morning (19 Sep)	8ft (2.5m)	16s
Afternoon (19 Sep)	10ft (3.0m)	14s
Evening (19 Sep)	10ft (3.0m)	13s

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

	Short Range Forecast Heavy rain (total 27mm), heaviest during Mon afternoon. Warm (max 26°C on Sat morning, min 22°C on Sun night). Winds decreasing (strong winds from the NNE on Mon morning, light winds from the WNW by Mon night).
	Saturday 19						Sunday 20								Monday 21
	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)	2	3	!	!	!	!	!	!	!	!	!	!	0	!	!	!	!	0	!	!	!	3
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	SE 16	SE 16	SE 14	SE 14	SE 13	SE 13	SE 13	SE 13	SE 12	ESE 12	SE 12	ESE 12	ESE 12	SE 12	SE 12	SE 12	SSE 13	SSE 13	SSE 13	SE 13	SE 12	SE 11
Wave Graph
kJ	1287	3499	4065	4042	3555	3502	3567	3165	3459	4022	2785	4574	4992	3089	3552	4709	5989	6587	8119	7948	4427	1112
Wind (km/h)	NE	NE	NE	NE	NE	NE	NE	NE	ENE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NNE	NNE	N	W
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross-off	cross	cross	cross	cross	cross-off	cross-off	cross-off	cross-off
High Tide				1:24PM1.31m			9:42PM1.39m					2:57PM1.42m				00:31AM1.31m					3:33PM1.51m
Low Tide	4:47AM0.62m				4:45PM1.27m					6:32AM0.65m				8:29PM1.23m				8:06AM0.62m


	5:31	—	—	—	—	—	—	5:31	—	—	—	—	—	—	—	5:33	—	—	—	—	—	—
	—	—	—	5:49	—	—	—	—	—	—	—	5:47	—	—	—	—	—	—	—	5:45	—	—
mm	—	—	—	—	—	—	—	—	—	1	—	—	1	7	2	—	2	2	1	9	2	—
Temp °C	22	23	26	26	25	25	25	25	24	23	23	24	24	22	22	23	23	24	26	26	25	25
Feels °C	20	21	25	26	25	25	25	25	23	21	21	22	21	20	19	20	21	21	23	24	27	26
Swell 1 Height (m) Direction Period (s)	SE 16	SE 16	SE 14	SE 14	SE 13	SE 13	SE 13	SE 13	SE 12	SE 12	SE 12	SE 12	SE 12	SE 12	SE 12	SE 12	SSE 13	SSE 13	SSE 13	SE 13	SE 12	SE 11
kJ	1287	3499	4065	4042	3555	3502	3567	3165	3459	3026	2785	3399	3580	3089	3552	4709	5989	6587	8119	7948	4427	1112
Swell 2 Height (m) Direction Period (s)	SE 13	—	—	S 9	S 9	S 9	—	—	—	S 16	—	—	E 13	E 13	E 13	E 12	E 12	E 12	E 9	W 6	W 6	E 10
kJ	802	—	—	2	2	2	—	—	—	132	—	—	13	13	13	27	26	26	515	17	36	514
Swell 3 Height (m) Direction Period (s)	—	—	—	—	—	—	—	—	—	—	—	—	—	E 13	—	—	—	—	—	—	W 6	W 6
kJ	—	—	—	—	—	—	—	—	—	—	—	—	—	28	—	—	—	—	—	—	12	128
Wind waves Height (m) Direction Period (s)	E 8	E 8	ENE 8	E 6	E 7	E 7	ENE 6	E 7	ENE 7	ESE 12	NE 5	ESE 12	ESE 12	NE 5	NNE 6	NNE 6	NNE 6	NNE 6	NE 6	NNE 6	W 6	W 7
kJ	203	227	627	235	465	377	309	402	383	4022	47	4574	4992	106	93	71	105	143	266	137	130	345
Nearest Offshore or Glassy	Akabane Long Beach Shizuoka	Nunoshima Shikoku	Dragons Leaf Kyu Shu	Kugenuma Rivermouth Kanagawa	Kugenuma Rivermouth Kanagawa	Kugenuma Rivermouth Kanagawa	Uchiboso Chiba	Kugenuma Rivermouth Kanagawa	Choshi Chiba	Yasuda Rivermouth Shikoku	Yasuda Rivermouth Shikoku	Yasuda Rivermouth Shikoku	Yasuda Rivermouth Shikoku	Yasuda Rivermouth Shikoku	Asakawa Shikoku	Asakawa Shikoku	Asakawa Shikoku	Asakawa Shikoku	Osaki Point Shikoku	Asakawa Shikoku	Suruga Bay Shizuoka	Suruga Bay Shizuoka
Rating (10 max)	4	4	4	4	4	4	4	4	4	6	6	6	5	5	4	4	4	4	4	4	5	4
Distance (km)	94	351	619	132	132	132	150	132	260	415	415	415	415	415	373	373	373	373	397	373	2	2
Best forecast wave conditions in Shizuoka	Akabane Long Beach																				Suruga Bay	Suruga Bay
Rating (10 max)	4																				5	4
Best forecast wave conditions in Japan	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Dragons Leaf Kyu Shu	Shichirigahama Kanagawa	Kaifu Rivermouth Shikoku	Kaifu Rivermouth Shikoku	Uchiboso Chiba	Uchiboso Chiba	Nagata Kyu Shu	Cape Toi Kyu Shu	Nagata Kyu Shu	Nagata Kyu Shu	Cape Toi Kyu Shu	Cape Toi Kyu Shu	Cape Toi Kyu Shu	Cape Toi Kyu Shu	Yasuda Rivermouth Shikoku	Yasuda Rivermouth Shikoku	Nagata Kyu Shu	Niyodo Rivermouth Shikoku	Suruga Bay Shizuoka	Suruga Bay Shizuoka
Rating (10 max)	4	4	4	4	5	5	4	4	7	7	6	6	7	6	5	5	5	5	4	4	5	4
Header Global	El Huerto Spain	Cathedral Rock Australia	Shingles New Zealand	Afife Portugal	Kaifu Rivermouth Japan	Trial Harbour Australia	Trial Harbour Australia	Easter Reef Australia	Asu Indonesia	Noises Australia	Asu Indonesia	Dunedin - Bobs Beach New Zealand	Papatowai New Zealand	Papatowai New Zealand	Shipwrecks Bay-Peaks New Zealand	Shipwrecks Bay-Peaks New Zealand	Shipwreck Bay-Supertubes New Zealand	Cyclops Australia	Cyclops Australia	Shipwrecks Bay-Peaks New Zealand	Ahijedero Mexico	Ahijedero Mexico
Rating (10 max)	5	5	5	4	5	8	8	5	4	5	4	5	9	9	7	8	8	5	5	5	4	4

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 (19 Sep):

Short Range Forecast

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