Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 8 am 11 Sep 2026 (local time)

Forecast update in hr min

Today's Katahama sea temperature is

27.2°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 (11 Sep):

Morning surf: Morning surf (11 Sep, local time) - 1.5ft (0.4m), 14s period with ESE swell.
Afternoon surf: Afternoon surf (11 Sep, local time) - 1.5ft (0.4m), 14s period with ESE swell.
Evening surf: Evening surf (11 Sep, local time) - 1.5ft (0.4m), 14s period with ESE swell.

The current surf forecast for Katahama at 5PM is: 0.4m 14s primary swell from a East-southeast direction and 0.6m 4s secondary swell from a East direction (forecast issued at 08:00am September 11). An open ocean swell of 0.9m 7s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (JST) & Date	Wave Height	Wave Period
Morning (11 Sep)	1.5ft (0.4m)	14s
Afternoon (11 Sep)	1.5ft (0.4m)	14s
Evening (11 Sep)	1.5ft (0.4m)	14s

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

	Short Range Forecast Heavy rain (total 96mm), heaviest during Fri morning. Warm (max 25°C on Sun morning, min 21°C on Fri night). Wind will be generally light.
	Friday 11						Saturday 12								Sunday 13
	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	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	E 6	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14	E 14	E 14	ESE 14	ESE 14	ESE 14	ESE 14	ESE 14	ESE 13	ESE 13	ESE 13	ESE 13	E 13	E 13	E 13	E 13	E 13
Wave Graph
kJ	64	63	67	68	67	63	94	94	145	149	147	149	145	139	137	184	184	125	123	121	166	166
Wind (km/h)	ENE	ESE	ENE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	ENE	SE	SSE	SE	E
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross	cross-on	glassy	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross-on	on	on	on	cross-on
High Tide	4:56AM1.67m				5:31PM1.72m				5:30AM1.71m				5:51PM1.76m					6:04AM1.72m				6:14PM1.79m
Low Tide			11:19AM0.48m				11:38PM0.64m				11:44AM0.52m					00:04AM0.54m				12:10PM0.57m


	5:26	—	—	—	—	—	—	5:26	—	—	—	—	—	—	—	5:26	—	—	—	—	—	—
	—	—	—	—	6:00	—	—	—	—	—	—	5:59	—	—	—	—	—	—	—	5:58	—	—
mm	22	32	16	8	10	3	6	7	4	5	3	2	—	—	—	—	—	—	—	—	—	—
Temp °C	20	22	23	22	22	21	21	21	21	21	21	22	23	23	23	23	23	24	25	25	24	24
Feels °C	20	24	28	24	25	23	23	22	22	22	22	23	24	24	25	25	25	27	28	28	27	28
Swell 1 Height (m) Direction Period (s)	S 8	S 8	ESE 5	SSW 8	SSW 7	SSW 7	SSW 7	SSW 7	S 7	S 7	SSW 7	SSW 7	SSW 7	ESE 13	ESE 13	ESE 13	ESE 13	E 13	E 13	E 13	SE 8	SE 8
kJ	74	74	42	94	91	97	97	97	54	49	54	53	51	139	137	184	184	125	123	121	49	64
Swell 2 Height (m) Direction Period (s)	ESE 14	ESE 14	S 8	ESE 14	ESE 14	ESE 14	E 14	E 14	SW 7	SW 7	ESE 14	ESE 14	ESE 14	SSW 7	SSW 7	SSW 7	SSW 7	SSW 7	SE 9	SE 9	E 13	E 13
kJ	64	63	72	68	67	63	94	94	41	43	147	149	145	36	26	27	19	16	38	59	166	166
Swell 3 Height (m) Direction Period (s)	ESE 10	ESE 10	ESE 14	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 14	ESE 14	SW 7	SW 6	—	S 9	SE 7	—	SE 9	SE 9	SSW 7	SSW 7	SSW 7	SSW 7
kJ	10	9	67	19	19	19	19	19	145	149	17	15	—	2	2	—	3	22	16	9	9	9
Wind waves Height (m) Direction Period (s)	E 6	E 5	—	E 5	E 4	E 4	E 5	E 5	E 4	E 5	E 5	E 5	E 5	E 5	E 4	E 4	E 4	E 4	E 4	E 3	E 3	ENE 3
kJ	61	59	—	21	11	17	28	27	25	36	37	28	28	27	25	13	7	4	4	4	2	2
Nearest Offshore or Glassy	Mera Chiba	Akabane Long Beach Shizuoka	Suruga Bay Shizuoka	Omaezaki Shizuoka	Mera Chiba	Mera Chiba	Mera Chiba	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Suruga Bay Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Keta Reef Oshima Izu Islands	Omaezaki Shizuoka	Omaezaki Shizuoka
Rating (10 max)	1	2	1	1	2	2	2	2	2	2	2	2	1	1	1	2	2	1	1	1	2	2
Distance (km)	150	94	2	13	150	150	150	13	13	13	13	13	13	2	13	13	13	13	13	104	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)		2	2	1				2	2	2	2	2	1	1	1	2	2	1	1		2	2
Best forecast wave conditions in Japan	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Mera Chiba	Niyodo Rivermouth Shikoku	Kaiser's (Hachijojima Island) Izu Islands	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Big Ben Chiba	Amatu Chiba	Big Ben Chiba	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Amatu Chiba	Amatu Chiba	Niyodo Rivermouth Shikoku	Kuminatu Chiba	Kuminatu Chiba	Matsube Bay Chiba	Mera Chiba	Mera Chiba	Mera Chiba	Niyodo Rivermouth Shikoku
Rating (10 max)	1	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2
Header Global	Trial Harbour Australia	Trial Harbour Australia	Little Wanganui New Zealand	Blaketown Wedge New Zealand	Tessellated Pavements Australia	Easter Reef Australia	Trial Harbour Australia	Trial Harbour Australia	Trial Harbour Australia	Trial Harbour Australia	Easter Reef Australia	Shipwreck Bay-Supertubes New Zealand	Shipwreck Bay-Supertubes New Zealand	White Rock - The Spit New Zealand	Asu Indonesia	Asu Indonesia	Asu Indonesia	Shipwreck Bay-Supertubes New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Ouano Lefts New Caledonia
Rating (10 max)	9	9	7	5	9	9	9	9	9	8	5	7	7	6	5	5	5	7	9	8	6	6

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 (11 Sep):

Short Range Forecast

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