Niyodo Rivermouth Surf Forecast

/ Shikoku (17 surf breaks) /

Japan (129 surf breaks)

Surf Forecasts:

Niyodo Rivermouth surfForecast / Shikoku / Japan

48hr Weather and Surf, issued 2 pm Thursday 18 Sep 2025 JST

Forecast update in hr min s Forecast update imminent

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

Today's Niyodo Rivermouth sea temperature is 28.9° C
(Which is 2.4°C warmer than normal for this time of year)

How big are the waves at Niyodo Rivermouth today?

The current surf forecast for Niyodo Rivermouth at 3PM is: 0.4m 9s primary swell from a East-southeast direction and 0.4m 10s secondary swell from a Southeast direction, 0.6m 5s secondary swell from a South-southwest direction (forecast issued at 02:00pm September 18). The wind direction is predicted to be cross-onshore.

Time (JST) & Date	Wave Height	Wave Period
Morning (18 Sep)	-	-
Afternoon (18 Sep)	1.5ft (0.4m)	10s
Evening (18 Sep)	1.5ft (0.4m)	10s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Thursday 18				Friday 19								Saturday 20								Sunday 21
	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	0 AM	3 AM	6 AM	9 AM
Rating (10 max)	0	0	1	1	1	1	0	0	0	1	1	1	0	1	1	1	1	1	1	1	1	1	1	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	ESE	SE	SE	SE	SE	SE	SE	SE	SE	SE	ESE	SE	ESE	E	E	E	E	E	E	E	E	ESE	ESE	E
Period(s) (?)	10	10	10	10	10	10	10	10	9	10	9	9	9	9	9	9	9	9	9	9	9	9	9	7
Wave Graph (?)
kJ (?)	31	29	33	33	47	46	33	45	42	23	35	41	32	38	95	157	162	127	101	101	78	47	32	32
Wind (km/h)	SSW	SSW	NNE	N	N	N	N	N	S	SSW	ESE	NNE	N	NNE	NE	NNE	SSW	SSW	E	NNE	NNW	N	N	NNW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	on	cross- on	off	off	off	off	off	glass	on	glass	glass	glass	glass	glass	glass	glass	glass	glass	glass	off	cross- off	off	off	off
High Tide / height (m)			4:50PM 1.65				3:58AM 1.63				5:14PM 1.71				4:43AM 1.74				5:36PM 1.76				5:21AM 1.81
Low Tide / height (m)					10:29PM 0.92				10:38AM 0.29				10:59PM 0.76				11:12AM 0.27				11:27PM 0.62

	Thursday 18				Friday 19								Saturday 20								Sunday 21
Sunrise	-	-	-	-	-	-	5:50	-	-	-	-	-	-	-	5:50	-	-	-	-	-	-	-	5:50	-
Sunset	-	-	6:07	-	-	-	-	-	-	-	6:07	-	-	-	-	-	-	-	6:06	-	-	-	-	-

Rain (mm)	-	1	1	-	-	-	-	-	-	2	2	-	-	-	-	-	1	-	-	1	1	-	-	-
Temp. °C	31	30	28	25	25	24	24	26	27	26	26	25	24	24	23	25	26	26	26	25	24	24	23	26
Feels °C (?)	34	34	32	28	28	27	27	30	30	30	30	29	28	27	26	29	30	30	32	29	27	27	25	28

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 The wind is still cross-on at Niyodo Rivermouth (light winds from the SW at Kochi Airport 3 km from Niyodo Rivermouth). 0.5m 7s swell from the SE with a 0.3m 7s swell from the SSE. 2 swells combining to make bigger set waves.
2 hours 5 minutes ago Niyodo Rivermouth

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2 h 5 min ago

13 km/h

Cross-On

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