Keta Reef Oshima 48 hour detailed Surf Forecast

Lat Long: 34.74° N 139.36° E

Issued: 8 am 24 Oct 2026 (local time)

Forecast update in hr min

Today's Keta Reef Oshima sea temperature is

24.7°C

Keta Reef Oshima 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 Keta Reef Oshima today (24 Oct):

Morning surf: Morning surf (24 Oct, local time) - 4.5ft (1.3m), 14s period with SSW swell.
Afternoon surf: Afternoon surf (24 Oct, local time) - 4.5ft (1.3m), 14s period with SSW swell.
Evening surf: Evening surf (24 Oct, local time) - 5ft (1.5m), 14s period with SSW swell.

The current surf forecast for Keta Reef Oshima at 11AM is: 1.3m 14s primary swell from a South-southwest direction and 1.2m 8s secondary swell from a Southeast direction (forecast issued at 08:00am October 24). The wind direction is predicted to be cross-offshore.

Time (JST) & Date	Wave Height	Wave Period
Morning (24 Oct)	4.5ft (1.3m)	14s
Afternoon (24 Oct)	4.5ft (1.3m)	14s
Evening (24 Oct)	5ft (1.5m)	14s

Table - waves today at Keta Reef Oshima. (Swell directed towards the surf break)

	Short Range Forecast Heavy rain (total 50mm), heaviest during Sat afternoon. Warm (max 25°C on Sun morning, min 19°C on Sat afternoon). Winds increasing (calm on Sat night, strong winds from the SSW by Mon night).
	Saturday 24						Sunday 25								Monday 26
	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	1	1	3	1	2	2	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)	SSW 13	SSW 14	SSW 14	SSW 14	SSW 14	SSW 14	SW 13	SSW 14	SW 15	SSW 13	SSW 14	SSW 6	SW 7	SW 13	SW 12	SW 12	SW 12	SW 12	SW 12	SW 12	SW 12	SW 11
Wave Graph
kJ	373	578	691	638	663	826	400	663	685	852	1601	319	355	161	144	139	112	192	195	164	137	123
Wind (km/h)	ESE	ESE	SE	SSW	N	NNE	NNE	SW	SW	WSW	SW	SW	WNW	NNE	NE	NE	NE	NE	NNE	NNE	ENE	W
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-off	cross-off	cross-off	glassy	cross-off	cross-off	glassy	cross-on	cross-on	cross-on	cross-on	cross-on	on	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	off	glassy
High Tide	3:13AM1.38m				3:23PM1.44m				3:59AM1.47m				3:45PM1.49m				4:44AM1.52m				4:08PM1.54m
Low Tide			9:17AM0.54m				9:41PM0.36m				9:53AM0.60m				10:14PM0.20m				10:27AM0.68m


	5:54	—	—	—	—	—	—	5:54	—	—	—	—	—	—	—	5:56	—	—	—	—	—	—
	—	—	—	4:58	—	—	—	—	—	—	—	4:57	—	—	—	—	—	—	—	4:55	—	—
mm	—	—	—	8	10	—	—	—	—	—	—	—	—	—	—	—	—	—	1	8	9	8
Temp °C	22	23	23	21	19	19	19	21	23	24	25	25	23	21	21	21	20	20	20	20	21	21
Feels °C	21	22	22	24	16	18	21	20	21	21	21	21	23	19	20	19	17	18	19	18	21	24
Swell 1 Height (m) Direction Period (s)	SE 8	SSW 14	SSW 14	SSW 14	SE 7	SSW 14	ESE 7	SSW 14	SW 15	ESE 8	ESE 8	SE 8	SSW 7	SSW 7	SSW 7	SSW 7	SSW 7	SW 12	SW 12	SW 12	SW 12	ESE 6
kJ	196	578	691	638	195	826	146	663	685	88	76	62	198	140	111	68	51	192	195	164	137	53
Swell 2 Height (m) Direction Period (s)	SSW 13	SE 8	—	SW 19	SSW 14	ESE 7	SW 13	SE 7	SE 7	SW 15	—	—	SW 13	SW 13	SW 12	SW 12	SW 12	ESE 10	ESE 10	ESE 9	ESE 9	SW 11
kJ	373	201	—	175	663	168	400	116	184	215	—	—	239	161	144	139	112	81	80	76	75	123
Swell 3 Height (m) Direction Period (s)	SW 15	—	—	—	SW 19	SW 18	SW 16	SW 16	—	—	—	—	ESE 8	ESE 10	ESE 10	ESE 10	ESE 10	—	—	S 15	S 15	ESE 9
kJ	226	—	—	—	219	206	375	260	—	—	—	—	61	83	83	83	81	—	—	4	4	47
Wind waves Height (m) Direction Period (s)	—	—	SE 8	SE 8	SE 7	—	—	—	SSE 7	SSW 13	SSW 14	SSW 6	SW 7	NE 3	NE 4	NE 4	ENE 4	ENE 4	ENE 4	E 4	ENE 4	N 4
kJ	—	—	227	250	263	—	—	—	173	852	1601	319	355	4	8	14	26	19	18	19	27	18
Nearest Offshore or Glassy	Usami Shizuoka	Keta Reef Oshima Izu Islands	Keta Reef Oshima Izu Islands	Keta Reef Oshima Izu Islands	Usami Shizuoka	Keta Reef Oshima Izu Islands	Sakawa River Kanagawa	Mera Chiba	Keta Reef Oshima Izu Islands	Shimoda Yamatoken (Tatado Hama) Shizuoka	Shimoda Yamatoken (Tatado Hama) Shizuoka	Suruga Bay Shizuoka	Hashikui Bay Shikoku	Nunoshima Shikoku	Nagahama Kanagawa	Mera Chiba	Mera Chiba	Mera Chiba	Mera Chiba	Mera Chiba	Uchiboso Chiba	Keta Reef Oshima Izu Islands
Rating (10 max)	2	2	2	2	1	3	2	4	2	1	1	3	2	3	1	3	3	3	2	2	1	1
Distance (km)	38	0	0	0	38	0	58	47	0	40	40	103	457	453	55	47	47	47	47	47	53	0
Best forecast wave conditions in Izu Islands		Keta Reef Oshima	Keta Reef Oshima	Keta Reef Oshima		Keta Reef Oshima			Niijima - Habushiura	Niijima - Habushiura												Keta Reef Oshima
Rating (10 max)		2	2	2		3			4	4												1
Best forecast wave conditions in Japan	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Omaezaki Shizuoka	Keta Reef Oshima Izu Islands	Omaezaki Shizuoka	Chikura Chiba	Omaezaki Shizuoka	Omaezaki Shizuoka	Suruga Bay Shizuoka	Suruga Bay Shizuoka	Osaki Point Shikoku	Nunoshima Shikoku	Niyodo Rivermouth Shikoku	Big Ben Chiba	Omaezaki Shizuoka	Mera Chiba	Kaifu Rivermouth Shikoku	Mera Chiba	Takegashima Shikoku	Takegashima Shikoku
Rating (10 max)	4	4	4	4	4	3	4	4	5	4	3	3	4	3	3	3	3	3	2	2	2	2
Header Global	Benkunqut Indonesia	Playa de la Cagonera Spain	Trial Harbour Australia	Deba Spain	Deba Spain	Deba Spain	Trial Harbour Australia	Benkunqut Indonesia	Purakaunui Bay New Zealand	Trial Harbour Australia	Afife Portugal	Afife Portugal	Ahijedero Mexico	Ahijedero Mexico	Deba Spain	Ahijedero Mexico	Vanthrax France	La Nora Spain	Cabo Lastres Spain	Deba Spain	Deba Spain	Deba Spain
Rating (10 max)	5	6	7	7	5	5	5	5	5	5	4	4	4	4	5	4	5	5	5	5	5	5

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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Keta Reef Oshima 48 hour detailed Surf Forecast

How big are the waves at Keta Reef Oshima today (24 Oct):

Short Range Forecast

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