Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 am 28 Jul 2026 (local time)

Forecast update in hr min

Today's Katahama sea temperature is

27.5° 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 (28 Jul):

Morning surf: Morning surf (28 Jul, local time) - 1.5ft (0.5m), 10s period with SE swell.
Afternoon surf: Afternoon surf (28 Jul, local time) - 1.5ft (0.4m), 10s period with ESE swell.
Evening surf: Evening surf (28 Jul, local time) - 1.5ft (0.4m), 10s period with ESE swell.

The current surf forecast for Katahama at 7AM is: 0.5m 10s primary swell from a Southeast direction and 0.6m 4s secondary swell from a East direction (forecast issued at 02:00am July 28). An open ocean swell of 0.6m 9s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (JST) & Date	Wave Height	Wave Period
Morning (28 Jul)	1.5ft (0.5m)	10s
Afternoon (28 Jul)	1.5ft (0.4m)	10s
Evening (28 Jul)	1.5ft (0.4m)	10s

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

	Short Range Forecast Light rain (total 2mm), mostly falling on Tue afternoon. Warm (max 34°C on Wed afternoon, min 26°C on Tue morning). Winds decreasing (fresh winds from the W on Wed morning, calm by Thu afternoon).
	Tuesday 28								Wednesday 29								Thursday 30
	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	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	SE 10	SE 10	SE 10	SE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	SE 10	SE 10	ESE 10	SE 10	SE 10	SE 10	SE 10	SE 10	SE 10	SE 10	WSW 6	SW 6	SE 10
Wave Graph
kJ	48	48	49	48	38	38	38	38	38	38	38	27	26	37	23	23	14	14	14	14	14	0	0	15
Wind (km/h)	ESE	ESE	ESE	ESE	SSE	SW	WSW	W	W	W	W	W	W	W	WNW	NNW	WNW	NW	N	SW	SSE	SSE	ENE	NW
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-on	on	on	on	cross-on	cross	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	off	cross-off	off	cross-off	glassy	cross-on	glassy	glassy	off
High Tide			3:57AM1.57m				5:56PM1.59m				4:38AM1.62m					6:17PM1.63m			5:17AM1.66m					6:40PM1.67m
Low Tide	10:57PM1.12m				11:06AM0.27m				11:27PM1.04m				11:37AM0.25m				11:55PM0.96m					12:06PM0.25m


	—	4:52	—	—	—	—	—	—	—	4:54	—	—	—	—	—	—	—	4:54	—	—	—	—	—	—
	—	—	—	—	—	—	6:52	—	—	—	—	—	—	—	6:52	—	—	—	—	—	—	—	6:51	—
mm	—	—	—	—	—	2	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Temp °C	25	25	25	26	26	28	28	27	27	27	26	30	32	34	32	29	29	28	26	28	30	31	29	28
Feels °C	28	28	28	29	28	30	30	27	26	26	25	29	29	32	31	31	32	31	28	31	32	35	34	32
Swell 1 Height (m) Direction Period (s)	SSW 9	SSW 9	SSW 9	SSW 9	SSW 9	SSW 9	SSW 9	SSW 8	SSW 8	SSW 8	SSW 8	SSW 8	SE 10	ESE 10	SE 10	SW 6	SW 7	SSW 7	SSW 7	SW 7	SW 7	SW 6	SW 6	SW 5
kJ	61	62	45	61	58	58	58	41	40	27	26	26	24	37	23	116	97	81	59	54	63	27	30	40
Swell 2 Height (m) Direction Period (s)	SE 10	SE 10	SE 10	SE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	ESE 10	SE 10	SE 13	SE 12	SE 12	SE 10	W 5	W 5	SE 10	SE 10	SE 10	WNW 4	WNW 4	SSW 8
kJ	48	48	49	48	38	38	38	38	38	38	38	23	26	6	6	23	20	20	14	14	14	6	6	11
Swell 3 Height (m) Direction Period (s)	SE 14	SE 14	SE 13	SE 13	SE 13	ESE 7	SE 13	SE 13	SE 13	SE 13	SE 13	SE 13	S 8	E 13	E 13	E 9	SE 10	SE 10	ESE 12	ESE 12	E 9	SSW 7	SSW 7	SE 10
kJ	29	29	28	28	27	9	27	27	27	27	27	27	5	3	3	7	14	14	14	14	6	20	17	15
Wind waves Height (m) Direction Period (s)	E 4	E 4	E 4	E 4	ESE 4	—	SW 2	WSW 4	WSW 4	WSW 4	WSW 5	WSW 5	WSW 6	SW 6	SW 6	WNW 5	WNW 6	WNW 6	W 5	W 4	WNW 5	WSW 6	WSW 4	WSW 5
kJ	16	10	11	8	4	—	2	14	23	43	65	100	171	209	182	24	71	55	17	9	30	64	34	61
Nearest Offshore or Glassy	Sakawa River Kanagawa	Sakawa River Kanagawa	Sakawa River Kanagawa	Sakawa River Kanagawa	Keta Reef Oshima Izu Islands	Susuki Shizuoka	Susuki Shizuoka	Susuki Shizuoka	Sagami River Kanagawa	Sakawa River Kanagawa	Sakawa River Kanagawa	Kurihama Kanagawa	Kurihama Kanagawa	Uraga Point Kanagawa	Sakawa River Kanagawa	Suruga Bay Shizuoka	Suruga Bay Shizuoka	Suruga Bay Shizuoka	Suruga Bay Shizuoka	Ohara Chiba	Kisami-Ohama Beach Shizuoka	Niijima - Awaii Izu Islands	Niijima - Awaii Izu Islands	Ohara Chiba
Rating (10 max)	1	1	1	1	1	1	1	1	1	1	1	2	2	2	1	1	1	1	1	1	1	1	1	1
Distance (km)	103	103	103	103	104	6	6	6	124	103	103	145	145	148	103	2	2	2	2	208	65	104	104	208
Best forecast wave conditions in Shizuoka						Susuki	Akabane Long Beach	Akabane Long Beach								Suruga Bay	Suruga Bay	Suruga Bay	Omaezaki		Kisami-Ohama Beach
Rating (10 max)						1	1	1								1	1	1	1		1
Best forecast wave conditions in Japan	Kaiser's (Hachijojima Island) Izu Islands	Niyodo Rivermouth Shikoku	Kaiser's (Hachijojima Island) Izu Islands	Kaiser's (Hachijojima Island) Izu Islands	Takegashima Shikoku	Takegashima Shikoku	Kaifu Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Matsube Bay Chiba	Matsube Bay Chiba	Matsube Bay Chiba	Shida Chiba	Nunoshima Shikoku	Niyodo Rivermouth Shikoku	Chikura Chiba	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niijima - Habushiura Izu Islands	Tsurigasaki Surfing Beach (Tokyo 2020) Chiba	Tsurigasaki Surfing Beach (Tokyo 2020) Chiba	Tsurigasaki Surfing Beach (Tokyo 2020) Chiba
Rating (10 max)	2	1	2	2	1	1	1	1	1	1	2	2	2	2	1	1	2	1	1	1	1	1	1	1
Header Global	Chameau Mauritius	Chameau Mauritius	Caravan Park/Lamberts Bay South Africa	Gerickes Point South Africa	Cape St Martin South Africa	Cape St Martin South Africa	Punta Palmilla Mexico	Punta Palmilla Mexico	Trial Harbour Australia	Cobblestones Australia	Cobblestones Australia	Cobblestones Australia	Bullies Australia	Ahijedero Mexico	Point Roadnight Australia	Point Roadnight Australia	Point Roadnight Australia	Beach Road South Africa	Beach Road South Africa	Ahijedero Mexico	Ahijedero Mexico	Ahijedero Mexico	Ahijedero Mexico	Ahijedero Mexico
Rating (10 max)	5	5	5	6	5	5	9	6	9	5	5	5	6	4	8	7	5	4	4	4	4	4	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 (28 Jul):

Short Range Forecast

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