Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 8 pm Monday 20 Apr 2026 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
19.6° C
(Which is slightly warmer than usual)

How big are the waves at Niyodo Rivermouth today?

The current surf forecast for Niyodo Rivermouth at 4AM is: 1.7m 12s primary swell from a East-southeast direction and 0.3m 5s secondary swell from a South-southwest direction (forecast issued at 08:00pm April 20). The wind direction is predicted to be cross-offshore and the swell rating is 3.

Time (JST) & DateWave HeightWave Period
Morning (21 Apr)5ft (1.5m)12s
Afternoon (21 Apr)4.5ft (1.4m)11s
Evening (21 Apr)4.5ft (1.3m)11s

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


Updates in  hr  min  s Forecast update imminent
Mon
20
Tuesday
21
Wednesday
22
Thursday
23
6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM
Rating
(10 max)
4
4
4
3
3
3
3
3
3
2
2
2
2
2
1
1
2
2
2
1
2
2
1
1
Swell
Height Map
Wave Height (m) & direction (?)
2
ESE
1.9
ESE
1.9
ESE
1.7
ESE
1.6
ESE
1.5
ESE
1.5
ESE
1.4
ESE
1.4
ESE
1.3
ESE
1.2
E
1.1
E
1.1
E
1
E
0.9
ESE
0.9
ESE
0.9
E
0.8
E
0.8
E
0.8
E
0.8
E
0.8
E
0.7
E
0.5
SE
Period(s) (?)131312121212121111111111101010101010101010101013
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1342109910478767376145935134864153382752602121701701641301331301271259684
Wind
(km/h)
5
E
5
NE
5
NNE
5
N
10
NNW
20
NNW
20
NNW
15
NNW
10
N
10
N
10
N
10
N
10
NNE
5
SSE
5
S
5
S
5
SE
5
NNE
5
W
5
NNW
0
ENE
10
NNE
10
NE
5
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glassglassglassoffoffoffoffoffoffoffoffoffoffglassononglassglassglassglassglasscross-
off
cross-
off
glass
High Tide
/ height (m)
8:29PM
1.77
7:32AM
1.81
9:26PM
1.63
8:10AM
1.71
10:40PM
1.50
8:57AM
1.58
Low Tide
/ height (m)
1:55AM
0.90
2:29PM
0.10
2:38AM
1.04
3:24PM
0.24
3:33AM
1.15
Mon
20
Tuesday
21
Wednesday
22
Thursday
23
Sunrise----5:28-------5:26-------5:26---
Sunset6:38-------6:38-------6:39-------
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
clear
clear
part cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
light rain
mod rain
mod rain
Rain (mm)
1------------------124910
Temp. °C191817171717192118141312121718181717161412121213
Feels °C (?)201918171713141614119881516161616151412101113
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Niyodo Rivermouth surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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