Katahama 48 hour detailed Surf Forecast

Lat Long: 34.72° N 138.22° E

Issued: 8 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 1PM is: 0.4m 10s primary swell from a East direction (forecast issued at 08:00am July 23). An open ocean swell of 0.8m 5s is not directed at the surf break. The wind direction is predicted to be onshore.

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 Mostly dry. Warm (max 31°C on Thu morning, min 26°C on Sat night). Wind will be generally light.
	Thursday 23						Friday 24								Saturday 25
	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	1	1	1	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 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	31	31	31	30	30	29	28	27	27	27	19	18	30	30	41	41	41	41	40	40	39	37
Wind (km/h)	N	E	SSE	S	SSW	SE	ENE	ENE	NE	ESE	SE	SSE	SE	SE	E	ENE	NNW	SSE	S	SSE	SE	SSE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	glassy	glassy	on	cross-on	cross	glassy	cross-on	cross-on	cross	on	on	on	on	glassy	glassy	glassy	glassy	cross-on	cross-on	on	on	glassy
High Tide				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	27	30	31	31	30	29	28	27	27	29	29	29	28	28	27	27	27	29	29	29	29	28
Feels °C	32	35	35	34	34	35	33	32	32	33	32	33	32	34	33	33	33	34	32	32	34	34
Swell 1 Height (m) Direction Period (s)	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	79	49	32	21	30	28	37	31	20	17	13	9	30	30	40	40	36	35	35	35	35	35
Swell 2 Height (m) Direction Period (s)	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	SW 5	E 9	E 9	E 9	SE 16	SE 16	SE 16	SE 16	SE 15
kJ	31	31	31	30	16	29	28	27	27	27	15	15	8	3	25	25	25	41	40	40	39	37
Swell 3 Height (m) Direction Period (s)	SSE 10	SE 10	SE 10	SSE 10	S 8	SE 10	SE 10	SE 10	SE 10	SE 10	SE 11	SE 11	E 9	E 9	SE 16	SE 16	SE 16	E 9	E 9	E 9	SW 4	SW 4
kJ	10	16	16	10	5	16	15	15	14	14	19	18	14	14	41	41	41	14	13	13	3	2
Wind waves Height (m) Direction Period (s)	—	—	—	SW 5	SW 5	—	—	—	—	—	ESE 3	ESE 3	ESE 4	E 4	E 4	E 4	—	—	—	SW 4	—	—
kJ	—	—	—	20	19	—	—	—	—	—	3	4	4	2	3	1	—	—	—	3	—	—
Nearest Offshore or Glassy	Suruga Bay Shizuoka	Suruga Bay Shizuoka	Niijima - Awaii Izu Islands	Kisami-Ohama Beach Shizuoka	Susuki Shizuoka	Susuki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Omaezaki Shizuoka	Onjuku Chiba	Kaiser's (Hachijojima Island) Izu Islands	Uraga Point Kanagawa	Keta Reef Oshima Izu Islands	Keta Reef Oshima Izu Islands	Susuki Shizuoka	Susuki Shizuoka	Susuki Shizuoka	Susuki Shizuoka	Keta Reef Oshima Izu Islands	Keta Reef Oshima Izu Islands	Keta Reef Oshima Izu Islands	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
Distance (km)	2	2	104	65	6	6	13	13	13	202	236	148	104	104	6	6	6	6	104	104	104	2
Best forecast wave conditions in Shizuoka	Susuki	Omaezaki		Kisami-Ohama Beach	Susuki	Omaezaki	Omaezaki	Omaezaki	Omaezaki						Omaezaki	Akabane Long Beach	Akabane Long Beach	Akabane Long Beach				Shimoda Yamatoken (Tatado Hama)
Rating (10 max)	1	1		1	1	1	1	1	1						1	1	1	1				1
Best forecast wave conditions in Japan	Matsube Bay Chiba	Amatu 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	Kaiser's (Hachijojima Island) Izu Islands	Niyodo Rivermouth Shikoku	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)	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Header Global	Point Roadnight Australia	Point Roadnight Australia	Cobblestones Australia	Brak River South Africa	Point Roadnight Australia	Benkunqut Indonesia	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	Cathedral Rock Australia	Fish Boma South Africa	Boneyards South Africa	Papatowai New Zealand	Boneyards South Africa	Papatowai New Zealand	Blaketown Wedge New Zealand	Blaketown Wedge New Zealand
Rating (10 max)	6	6	4	4	7	4	4	9	9	9	9	9	9	7	9	5	5	6	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)

Latest Updates

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Katahama 48 hour detailed Surf Forecast

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

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