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 am Thursday 04 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 29.6° C
(Which is 2.2°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 7AM is: 1.2m 7s primary swell from a South direction and 0.9m 8s secondary swell from a East-southeast direction (forecast issued at 02:00am September 04). The wind direction is predicted to be glassy and the swell rating is 2.

Time (JST) & Date	Wave Height	Wave Period
Morning (04 Sep)	4ft (1.2m)	8s
Afternoon (04 Sep)	5ft (1.6m)	8s
Evening (04 Sep)	11ft (3.5m)	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 04								Friday 05								Saturday 06
	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)	1	1	1	1	2	0	0	!	0	0	!	!	4	4	4	2	2	2	1	1	0	0	1	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	SE	SSE	S	S	SE	SSE	S	S	S	S	S	S	S	SSW	S	S	S	S	S	S	S	S	S	S
Period(s) (?)	6	7	7	8	8	8	10	10	10	10	10	10	9	9	9	8	8	8	8	8	7	7	7	7
Wave Graph (?)
Energy (?)	354	214	260	319	338	453	3009	3820	2153	3429	2990	1930	1256	1812	1279	411	306	266	187	152	146	136	117	97
Wind (km/h)	SE	E	S	ESE	ENE	E	SE	SE	SSE	S	WSW	W	WSW	WNW	NW	NNE	N	N	N	WSW	SSW	S	SSE	ESE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross	on	cross	cross- off	cross	cross- on	cross- on	on	on	cross- on	cross	glass	glass	glass	off	off	off	off	glass	on	on	glass	glass
High Tide / height (m)		2:43AM 1.44					4:57PM 1.59				3:42AM 1.58				5:20PM 1.70				4:29AM 1.72				5:44PM 1.79
Low Tide / height (m)	9:50PM 1.16				9:53AM 0.40				10:24PM 1.02				10:32AM 0.26				10:55PM 0.88				11:07AM 0.16

	Thursday 04								Friday 05								Saturday 06
Sunrise	-	-	5:39	-	-	-	-	-	-	-	5:41	-	-	-	-	-	-	-	5:41	-	-	-	-	-
Sunset	-	-	-	-	-	-	6:28	-	-	-	-	-	-	-	6:25	-	-	-	-	-	-	-	6:24	-

Rain (mm)	4	4	46	16	7	11	19	5	8	14	3	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	26	25	25	25	25	25	26	27	27	27	26	27	30	32	30	27	26	26	25	28	29	29	27	27
Feels °C (?)	30	28	29	30	28	27	28	30	28	26	29	32	35	36	35	31	30	30	28	33	33	33	32	33

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 offshore at Niyodo Rivermouth (light winds from the N at Kochi Airport 3 km from Niyodo Rivermouth). A 1.8m swell from the SSE
2 hours 24 minutes ago Niyodo Rivermouth

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2 h 24 min ago

11 km/h

Offshore

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