Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 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 6AM is: 1.6m 16s primary swell from a Southeast direction and 1.6m 13s secondary swell from a Southeast direction (forecast issued at 02:00am September 19). An open ocean swell of 1.4m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

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 Moderate rain (total 19mm), heaviest on Mon afternoon. Warm (max 27°C on Mon afternoon, min 22°C on Sun morning). Mainly fresh winds.
	Saturday 19								Sunday 20								Monday 21
	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	2	3	3	!	!	!	!	!	!	!	!	!	!	!	!	!	!	!	!	!	!	!	!
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	SE 14	SE 14	SE 16	SE 16	SE 14	SE 14	SE 13	SE 13	SE 13	SE 13	SE 12	SE 12	SE 12	ESE 12	SE 12	SE 12	SE 12	SSE 12	SSE 13	SSE 13	SE 13	SSE 13	SE 13	SE 12
Wave Graph
kJ	265	715	1287	3499	4024	3996	3555	3284	3214	3020	2597	2680	2402	2281	2692	2943	3402	3392	5434	5751	6464	5664	5593	3120
Wind (km/h)	NE	NE	NNE	NE	NE	ENE	NE	NE	NE	NE	ENE	ENE	ENE	NE	NE	NE	NNE	NE	NE	NE	NE	NNE	N	W
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross	cross-off	cross-off	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
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	—	—	2	3	1	1	2	2	1	5	1
Temp °C	23	22	22	24	26	26	26	25	25	25	24	25	22	23	24	22	22	23	23	24	26	27	26	25
Feels °C	21	20	20	23	25	26	26	25	26	25	23	23	19	21	21	20	20	20	22	22	24	24	29	27
Swell 1 Height (m) Direction Period (s)	SE 14	SE 14	SE 16	SE 16	SE 14	SE 14	SE 13	SE 13	SE 13	SE 13	SE 12	SE 12	SE 12	SSE 15	SE 12	SE 12	SE 12	SSE 12	SSE 13	SSE 13	SE 13	SSE 13	SE 13	SE 12
kJ	265	715	1287	3499	4024	3996	3555	3284	3214	3020	2597	2680	2402	266	2692	2943	3402	3392	5434	5751	6464	5664	5593	3120
Swell 2 Height (m) Direction Period (s)	S 10	S 10	SE 13	—	—	S 9	S 9	S 9	—	—	—	—	—	S 15	—	E 13	E 13	E 12	E 12	E 12	—	E 9	W 6	W 6
kJ	2	2	802	—	—	2	2	2	—	—	—	—	—	435	—	14	13	27	26	26	—	413	18	47
Swell 3 Height (m) Direction Period (s)	—	S 10	—	—	—	—	—	—	—	—	—	—	—	E 14	—	—	—	—	—	—	—	—	W 6	—
kJ	—	2	—	—	—	—	—	—	—	—	—	—	—	4	—	—	—	—	—	—	—	—	17	—
Wind waves Height (m) Direction Period (s)	E 8	E 8	E 8	E 8	E 7	E 7	E 6	ENE 7	ENE 6	ENE 6	ENE 6	E 7	E 7	ESE 12	—	NE 6	NE 6	ENE 9	NE 6	NNE 6	ENE 8	ENE 9	—	W 6
kJ	346	247	235	201	238	537	123	322	237	182	223	414	509	2281	—	80	143	705	122	100	866	463	—	109
Nearest Offshore or Glassy	Gomoda Shikoku	Akabane Long Beach Shizuoka	Omaezaki Shizuoka	Nunoshima Shikoku	Dragons Leaf Kyu Shu	Uchiboso Chiba	Uchiboso Chiba	Kugenuma Rivermouth Kanagawa	Kugenuma Rivermouth Kanagawa	Kugenuma Rivermouth Kanagawa	Kugenuma Rivermouth Kanagawa	Yasuda Rivermouth Shikoku	Yasuda Rivermouth Shikoku	Yasuda Rivermouth Shikoku	Yasuda Rivermouth Shikoku	Yasuda Rivermouth Shikoku	Asakawa Shikoku	Asakawa Shikoku	Mera Chiba	Mera Chiba	Asakawa Shikoku	Asakawa Shikoku	Suruga Bay Shizuoka	Suruga Bay Shizuoka
Rating (10 max)	1	4	4	4	4	4	4	4	4	3	3	5	5	5	5	5	4	4	6	7	4	4	5	4
Distance (km)	334	94	13	351	619	150	150	132	132	132	132	415	415	415	415	415	373	373	150	150	373	373	2	2
Best forecast wave conditions in Shizuoka		Akabane Long Beach	Akabane Long Beach																				Suruga Bay	Shimoda Yamatoken (Tatado Hama)
Rating (10 max)		4	4																				5	4
Best forecast wave conditions in Japan	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Unnamed Kyu Shu	Nunoshima Shikoku	Kaifu Rivermouth Shikoku	Kaifu Rivermouth Shikoku	Kaifu Rivermouth Shikoku	Uchiboso Chiba	Katagai Chiba	Cape Toi Kyu Shu	Nagata Kyu Shu	Nagata Kyu Shu	Nagata Kyu Shu	Cape Toi Kyu Shu	Cape Toi Kyu Shu	Cape Toi Kyu Shu	Mera Chiba	Mera Chiba	Osaki Point Shikoku	Kaifu Rivermouth Shikoku	Suruga Bay Shizuoka	Niyodo Rivermouth Shikoku
Rating (10 max)	4	4	4	5	5	4	5	5	5	3	4	6	5	5	6	6	5	5	6	7	5	4	5	4
Header Global	Playa Aguilera Spain	El Huerto Spain	El Huerto Spain	Cathedral Rock Australia	Shingles New Zealand	Fairhaven Australia	Kaifu Rivermouth Japan	Trial Harbour Australia	Trial Harbour Australia	Easter Reef Australia	Asu Indonesia	Asu Indonesia	Noises Australia	Ahijedero Mexico	Papatowai New Zealand	Papatowai New Zealand	Shipwrecks Bay-Peaks New Zealand	Shipwrecks Bay-Peaks New Zealand	Shipwreck Bay-Supertubes New Zealand	Shipwreck Bay-Supertubes New Zealand	Cyclops Australia	Shipwrecks Bay-Peaks New Zealand	Shipwrecks Bay-Peaks New Zealand	Papatowai New Zealand
Rating (10 max)	5	5	5	5	5	5	5	8	8	5	4	4	5	4	9	9	8	8	8	7	5	5	5	8

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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