Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 2 am 23 Jul 2026 (local time)

Forecast update in hr min

Today's Katahama sea temperature is

26.8° 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 (23 Jul):

Morning surf: Morning surf (23 Jul, local time) - 1.5ft (0.4m), 10s period with E swell.
Afternoon surf: Afternoon surf (23 Jul, local time) - 1.5ft (0.4m), 10s period with E swell.
Evening surf: Evening surf (23 Jul, local time) - 1.5ft (0.4m), 10s period with E swell.

The current surf forecast for Katahama at 9AM is: 0.4m 10s primary swell from a East direction (forecast issued at 02:00am July 23). An open ocean swell of 0.9m 5s is not directed at the surf break. The wind direction is predicted to be glassy.

Time (JST) & Date	Wave Height	Wave Period
Morning (23 Jul)	1.5ft (0.4m)	10s
Afternoon (23 Jul)	1.5ft (0.4m)	10s
Evening (23 Jul)	1.5ft (0.4m)	10s

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

	Short Range Forecast Some drizzle, heaviest during Sat night. Warm (max 31°C on Thu morning, min 26°C on Sat night). Wind will be generally light.
	Thursday 23								Friday 24								Saturday 25
	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)	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	0	0	0	0	0	1
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	E 10	E 10	E 10	E 10	E 10	E 10	E 10	E 10	E 9	E 9	E 9	E 9	SE 11	SE 11	SE 11	SE 11	SE 16	SE 16	SE 16	SE 16	SE 16	SE 16	SE 16	SE 15
Wave Graph
kJ	50	50	31	31	31	30	30	29	28	27	27	27	19	18	30	41	41	41	41	41	40	40	39	37
Wind (km/h)	WSW	WNW	N	E	SSE	S	SSW	SE	ENE	ENE	NE	SE	SSE	SSE	SSE	SSE	WSW	NW	NE	SE	SSE	SSE	SE	SE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-off	off	glassy	glassy	on	cross-on	cross	glassy	cross-on	cross-on	glassy	on	on	cross-on	on	glassy	glassy	glassy	cross	on	cross-on	on	on	glassy
High Tide	10:54PM1.52m					1:49PM1.20m			11:58PM1.48m						3:37PM1.30m			1:13AM1.46m					4:33PM1.40m
Low Tide				6:32AM0.63m			5:31PM1.11m					7:55AM0.56m				7:29PM1.21m					9:03AM0.46m


	—	4:48	—	—	—	—	—	—	—	4:50	—	—	—	—	—	—	—	4:50	—	—	—	—	—	—
	—	—	—	—	—	—	6:55	—	—	—	—	—	—	—	6:55	—	—	—	—	—	—	—	6:54	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Temp °C	28	27	27	29	31	31	30	29	28	27	27	29	29	29	28	28	27	27	27	29	29	28	28	28
Feels °C	32	32	32	34	35	34	34	36	33	32	32	33	32	33	33	34	33	33	32	34	32	31	32	34
Swell 1 Height (m) Direction Period (s)	E 10	E 10	SW 6	SW 5	SW 5	SW 5	E 10	SW 5	SW 5	SW 5	SW 5	SW 5	SW 5	SW 5	SE 11	SE 11	SE 11	SE 11	SE 10	SE 10	SE 10	SE 10	SE 10	SE 10
kJ	50	50	79	49	32	25	30	34	45	31	21	18	13	9	30	41	40	40	36	35	35	35	35	35
Swell 2 Height (m) Direction Period (s)	SE 11	SE 11	E 10	E 10	E 10	E 10	SE 10	E 10	E 9	E 9	E 9	E 9	E 9	E 9	SW 5	E 9	E 9	E 9	SE 16	SE 16	SE 16	SE 16	SE 16	SE 15
kJ	5	5	31	31	31	30	16	29	28	27	27	27	15	15	6	14	14	25	41	41	40	40	39	37
Swell 3 Height (m) Direction Period (s)	SE 20	SE 20	SSE 10	SE 10	SE 10	SSE 10	SSW 6	SE 10	SE 10	SE 10	SE 10	SE 10	SE 11	SE 11	E 4	SW 5	SE 16	SE 16	E 9	E 9	E 9	E 9	E 8	E 8
kJ	15	15	10	16	16	10	4	16	15	15	14	14	19	18	3	3	41	41	14	14	13	13	13	12
Wind waves Height (m) Direction Period (s)	SW 6	SW 6	WSW 6	—	—	SW 5	SW 5	—	—	—	E 2	E 3	ESE 3	ESE 4	—	—	—	—	—	—	—	—	—	—
kJ	111	111	81	—	—	24	19	—	—	—	1	1	2	4	—	—	—	—	—	—	—	—	—	—
Nearest Offshore or Glassy	Suruga Bay Shizuoka	Suruga Bay Shizuoka	Suruga Bay Shizuoka	Suruga Bay Shizuoka	Niijima - Awaii Izu Islands	Susuki Shizuoka	Susuki Shizuoka	Susuki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Mera Chiba	Ohara Chiba	Ohara Chiba	Keta Reef Oshima Izu Islands	Susuki Shizuoka	Susuki Shizuoka	Susuki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Keta Reef Oshima Izu Islands	Uraga Point Kanagawa	Kurihama Kanagawa	Suruga Bay Shizuoka
Rating (10 max)	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Distance (km)	2	2	2	2	104	6	6	6	13	13	13	150	208	208	104	6	6	6	13	13	104	148	145	2
Best forecast wave conditions in Shizuoka	Susuki	Susuki	Susuki	Omaezaki		Susuki	Susuki	Omaezaki	Omaezaki	Omaezaki	Omaezaki					Susuki	Akabane Long Beach	Akabane Long Beach	Akabane Long Beach	Akabane Long Beach				Omaezaki
Rating (10 max)	1	1	1	1		1	1	1	1	1	1					1	1	1	1	1				1
Best forecast wave conditions in Japan	Tsurigasaki Surfing Beach (Tokyo 2020) Chiba	Big Ben Chiba	Matsube Bay Chiba	Mera Chiba	Mera Chiba	Mera Chiba	Mera Chiba	Amatu Chiba	Kaiser's (Hachijojima Island) Izu Islands	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Kaiser's (Hachijojima Island) Izu Islands	Takegashima Shikoku	Kaiser's (Hachijojima Island) Izu Islands	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Kaiser's (Hachijojima Island) Izu Islands	Kaifu Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku
Rating (10 max)	1	2	2	1	1	1	1	1	1	1	1	1	1	1	2	1	1	1	1	1	1	1	1	1
Header Global	Viri Inga O Tuki Chile	Papa Tangaroa Chile	Point Roadnight Australia	Cobblestones Australia	Etang-Sale Reunion	Cobblestones Australia	Point Roadnight Australia	Dolphin Point South Africa	Benkunqut Indonesia	Point Roadnight Australia	Point Roadnight Australia	Dolphin Point South Africa	Fish Boma South Africa	Boneyards South Africa	Boneyards South Africa	Sea Vista South Africa	Sea Vista South Africa	Fish Boma South Africa	Fish Boma South Africa	Boneyards South Africa	Papatowai New Zealand	Papatowai New Zealand	Bancoora Australia	Blaketown Wedge New Zealand
Rating (10 max)	8	7	6	5	4	4	7	5	4	9	9	9	9	9	9	7	6	5	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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Katahama 48 hour detailed Surf Forecast

How big are the waves at Katahama today (23 Jul):

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