Yasuda Rivermouth Surf Forecast

/ Shikoku (17 surf breaks) /

Japan (129 surf breaks)

Surf Forecasts

Yasuda Rivermouth surfForecast / Shikoku / Japan

48hr Weather and Surf, issued 2 am Monday 18 Aug 2025 JST

Forecast update in hr min s Forecast update imminent

Yasuda Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Yasuda Rivermouth sea temperature is 29.2° C
(Which is 1.5°C warmer than normal for this time of year)

How big are the waves at Yasuda Rivermouth today?

The current surf forecast for Yasuda Rivermouth at 9AM is: 0.6m 12s primary swell from a Southeast direction and 0.3m 8s secondary swell from a East-southeast direction, 0.4m 3s secondary swell from a Southwest direction (forecast issued at 02:00am August 18). The wind direction is predicted to be glassy.

Time (JST) & Date	Wave Height	Wave Period
Morning (18 Aug)	2ft (0.6m)	12s
Afternoon (18 Aug)	2ft (0.6m)	12s
Evening (18 Aug)	1.5ft (0.4m)	12s

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

Hourly 12 Days

Shikoku Surf

Print Surf Table

Updates in hr min s Forecast update imminent

	Monday 18								Tuesday 19								Wednesday 20
	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM
Rating (10 max)	0	1	1	1	0	0	0	1	1	1	1	1	0	0	0	1	1	1	1	1	0	0	1	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW
Period(s) (?)	12	12	12	12	12	12	12	12	12	12	11	11	11	11	11	9	8	8	8	9	9	9	9	9
Wave Graph (?)
Energy (?)	104	124	94	111	129	143	115	64	68	64	63	62	60	60	81	90	101	98	110	149	167	214	250	290
Wind (km/h)	W	W	W	SW	SW	SW	SW	WNW	WNW	NNW	N	W	SW	SW	WSW	NNW	NNW	NW	NNW	W	SW	SW	SW	W
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	glass	glass	glass	on	on	on	glass	glass	cross- off	cross- off	glass	on	on	on	glass	cross- off	glass	cross- off	glass	on	on	on	cross- on
High Tide / height (m)	11:23PM 1.51						3:35PM 1.40			1:05AM 1.47					4:37PM 1.53			2:45AM 1.52					5:16PM 1.64
Low Tide / height (m)				7:30AM 0.46				8:05PM 1.25				9:00AM 0.36					9:47PM 1.17				10:04AM 0.25

	Monday 18								Tuesday 19								Wednesday 20
Sunrise	-	-	5:26	-	-	-	-	-	-	-	5:28	-	-	-	-	-	-	-	5:28	-	-	-	-	-
Sunset	-	-	-	-	-	-	6:46	-	-	-	-	-	-	-	6:45	-	-	-	-	-	-	-	6:45	-

Rain (mm)	-	1	1	-	-	1	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1	3	1
Temp. °C	26	26	26	28	29	29	28	26	26	25	25	28	29	29	28	26	25	25	25	28	29	28	27	26
Feels °C (?)	31	31	31	33	33	33	33	31	31	29	28	32	32	33	33	31	29	29	29	31	32	31	32	31

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Shikoku

Wind Update Continuing clean conditions at Yasuda Rivermouth (calm at Murotomisaki(47899-0) 28 km from Yasuda Rivermouth). 0.5m 6s windswell from the SSE with a 0.2m 10s swell from the SE and a 0.2m 3s local chop from the SSW as well as a 0.1m 8s swell from the SE. 4 swells combining to make bigger set waves.
1 hour 2 minutes ago Yasuda Rivermouth

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28 km away, 1 h 2 min ago

4 km/h

WNW

0.0

29.2

Air / Water (°C)

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