Rock Island 48 hour detailed Surf Forecast

Lat Long: 35.29° N 139.55° E

Issued: 8 pm 07 Oct 2026 (local time)

Forecast update in hr min

Today's Rock Island sea temperature is

24.0°C

Rock Island 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 Rock Island today (08 Oct):

Morning surf: Morning surf (08 Oct, local time) - 1.5ft (0.4m), 11s period with SE swell.
Afternoon surf: Afternoon surf (08 Oct, local time) - 1.5ft (0.4m), 10s period with SE swell.
Evening surf: Evening surf (08 Oct, local time) - 0.5ft (0.2m), 17s period with ESE swell.

The current surf forecast for Rock Island at 12AM is: 0.4m 12s primary swell from a East-southeast direction and 0.3m 11s secondary swell from a Southeast direction, 0.2m 3s secondary swell from a East-southeast direction (forecast issued at 08:00pm October 07). The wind direction is predicted to be cross-offshore.

Time (JST) & Date	Wave Height	Wave Period
Morning (08 Oct)	1.5ft (0.4m)	11s
Afternoon (08 Oct)	1.5ft (0.4m)	10s
Evening (08 Oct)	0.5ft (0.2m)	17s

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

	Short Range Forecast Mostly dry. Warm (max 24°C on Sat afternoon, min 19°C on Wed night). Wind will be generally light.
	Wed 7		Thursday 8								Friday 9
	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	1	0	0	0	1	0	0	0	1	1	1	1	1	0	0
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	SE 13	ESE 12	ESE 12	SE 12	SE 11	SE 11	SE 10	SE 10	SE 10	ESE 17	ESE 17	SE 9	ESE 20	SE 9	ESE 18	ESE 17	ESE 16	ESE 16
Wave Graph
kJ	134	60	58	65	31	29	37	35	35	29	27	29	38	32	61	58	51	50
Wind (km/h)	SE	E	ENE	NE	NNE	NE	NE	E	ESE	ESE	E	NE	NNE	NE	ENE	NE	ESE	ENE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross	cross-off	cross-off	off	off	off	off	cross-off	cross	cross	cross-off	cross-off	off	cross-off	cross-off	cross-off	cross-off	cross-off
High Tide	3:09PM1.36m			2:06AM1.30m					3:36PM1.40m				3:12AM1.39m				4:00PM1.43m
Low Tide		8:48PM0.94m				8:51AM0.48m					9:26PM0.78m				9:38AM0.50m


	—	—	—	5:41	—	—	—	—	—	—	—	5:41	—	—	—	—	—	—
	—	—	—	—	—	—	—	5:16	—	—	—	—	—	—	—	5:15	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Temp °C	23	22	21	21	19	20	21	22	22	20	20	20	19	20	21	23	21	21
Feels °C	21	20	19	18	15	18	19	20	20	19	20	20	18	18	19	21	18	20
Swell 1 Height (m) Direction Period (s)	SE 13	ESE 12	ESE 12	SE 12	SE 11	SE 11	SE 10	SE 10	SE 10	SE 10	SE 9	SE 9	SE 9	SE 9	SE 8	SE 8	ESE 16	ESE 16
kJ	134	60	58	65	31	29	37	35	35	14	13	29	21	20	18	11	51	50
Swell 2 Height (m) Direction Period (s)	SE 13	SE 12	SE 11	SE 4	ESE 11	ESE 11	SE 5	SE 18	SE 17	ESE 17	SE 5	ESE 16	ESE 20	ESE 18	ESE 18	ESE 17	SSE 8	SE 11
kJ	28	36	20	1	12	12	1	12	11	29	4	26	38	32	61	58	7	5
Swell 3 Height (m) Direction Period (s)	—	E 20	E 20	E 19	E 18	SE 5	E 18	E 21	E 21	—	ESE 17	SE 20	ESE 16	SE 12	SE 11	SE 11	SE 11	SE 11
kJ	—	8	7	7	6	1	6	8	8	—	27	16	25	5	5	5	5	5
Wind waves Height (m) Direction Period (s)	ESE 3	ESE 3	ESE 3	E 3	NE 2	NNE 2	NNE 2	—	SE 5	SE 5	—	—	—	—	—	—	SE 8	ESE 8
kJ	1	1	1	1	2	1	1	—	4	4	—	—	—	—	—	—	17	27
Nearest Offshore or Glassy	Oiso Jetty Kanagawa	Shichirigahama Kanagawa	Kamakura Kanagawa	Rock Island Kanagawa	Sakawa River Kanagawa	Uchiboso Chiba	Uchiboso Chiba	Rock Island Kanagawa	Sakawa River Kanagawa	Sakawa River Kanagawa	Sakawa River Kanagawa	Rock Island Kanagawa	Rock Island Kanagawa	Rock Island Kanagawa	Rock Island Kanagawa	Rock Island Kanagawa	Mera Chiba	Uchiboso Chiba
Rating (10 max)	1	1	1	1	1	1	1	1	1	1	2	1	1	1	1	1	4	1
Distance (km)	29	4	2	0	38	38	38	0	38	38	38	0	0	0	0	0	51	38
Best forecast wave conditions in Kanagawa	Sakawa River	Sakawa River	Oiso Jetty	Sakawa River	Sakawa River			zushi Marina	Sakawa River	Sakawa River	Sakawa River	Sakawa River	Sakawa River	Shonan	Inamura Point	Inamura Point
Rating (10 max)	3	2	1	2	1			1	1	1	2	1	1	1	1	1
Best forecast wave conditions in Japan	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Amatu Chiba	Kamogawa Chiba	Mera Chiba	Mera Chiba	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Niyodo Rivermouth Shikoku	Kuminatu Chiba	Matsube Bay Chiba	Mera Chiba	Omaezaki Shizuoka	Mera Chiba	Mera Chiba	Omaezaki Shizuoka
Rating (10 max)	4	4	3	4	4	3	3	2	2	2	3	4	4	4	4	4	4	4
Header Global	Trial Harbour Australia	Trial Harbour Australia	Trial Harbour Australia	The Hoek South Africa	Heaven South Africa	Batu Hiu Indonesia	Hell South Africa	Benkunqut Indonesia	Benkunqut Indonesia	Benkunqut Indonesia	Keramas Indonesia	Boneyards South Africa	Outside Corner Indonesia	Desert Point (Bangko-Bangko) Indonesia	Dolphin Point South Africa	Dolphin Point South Africa	Dolphin Point South Africa	Hullets Reef South Africa
Rating (10 max)	9	9	8	6	6	5	6	5	5	5	5	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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Rock Island 48 hour detailed Surf Forecast

How big are the waves at Rock Island today (08 Oct):

Short Range Forecast

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