Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 8 am Sunday 03 May 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
21.0° C
(Which is 1.1°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 2PM is: 1.5m 6s primary swell from a South-southwest direction and 0.4m 9s secondary swell from a East-southeast direction, 0.1m 9s secondary swell from a East direction (forecast issued at 08:00am May 03). The wind direction is predicted to be cross-onshore.

Time (JST) & DateWave HeightWave Period
Morning (03 May)2.5ft (0.8m)5s
Afternoon (03 May)5.5ft (1.7m)6s
Evening (03 May)11ft (3.5m)8s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 51mm), heaviest during Sun night. Warm (max 22°C on Sun night, min 13°C on Mon night). Winds decreasing (fresh winds from the SSW on Sun night, calm by Tue morning).

Sunday
3
Monday
4
Tuesday
5
Wed
6
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
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
Rating
(10 max)
1
1
0
0
0
0
!
!
1
2
0
0
0
1
1
1
1
1
0
0
1
1
1
1
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
0.4
ESE
10
0.8
SSW
5
1.1
SSW
5
1.7
SSW
6
2.4
SSW
7
3.5
SSW
8
3
SSW
9
3
SSW
9
2
SSW
8
1.8
SSW
8
1.5
SSW
8
1.3
SSW
8
1.1
SSW
8
0.9
SSW
7
0.7
SSW
7
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.5
ESE
10
0.5
ESE
10
0.5
ESE
10
0.6
ESE
10
0.6
ESE
10
0.6
ESE
10
Wave Graph
Metric surfscale
Energy kJ
37
34
62
187
512
1412
1341
1244
562
450
306
220
138
84
46
42
42
41
59
58
57
67
65
64
Wind (km/h)
5
NE
5
ESE
5
SSW
20
SSW
25
SSW
30
SSW
15
WSW
15
WSW
15
W
15
WNW
30
W
30
NW
15
NW
10
NW
5
NNW
10
N
10
N
5
ESE
5
SSE
10
SSE
5
SE
10
NE
10
NNE
5
NNE
glassy
glassy
cross-on
on
cross-on
cross-on
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
off
glassy
cross-on
on
glassy
cross-off
cross-off
cross-off
High Tide
6:02AM1.75m
7:20PM1.72m
6:27AM1.73m
7:55PM1.66m
6:53AM1.69m
8:33PM1.57m
Low Tide
12:39PM0.17m
00:51AM0.86m
1:11PM0.20m
1:19AM0.93m
1:44PM0.26m
1:49AM1.00m
part cloud
cloud
light rain
mod rain
heavy rain
heavy rain
light rain
part cloud
part cloud
part cloud
part cloud
clear
cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:15
5:13
5:13
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:49
6:49
6:50
6:51
1
6
15
24
5
Temp °C
18
19
19
20
20
22
21
20
17
18
19
19
17
15
14
13
13
17
18
18
17
15
15
15
18
20
20
19
19
20
22
19
15
15
12
12
12
12
12
11
11
15
16
16
16
13
13
14
Swell 1
Height (m)
Direction
Period (s)
0.5
SSW
4
0.4
ESE
9
0.4
ESE
9
0.5
ESE
9
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
2.5
SSW
9
2
SSW
8
1.8
SSW
8
1.5
SSW
8
1.3
SSW
8
1.1
SSW
8
0.9
SSW
7
0.7
SSW
7
0.5
SW
7
0.4
ESE
10
0.4
ESE
10
0.5
ESE
10
0.5
ESE
10
0.5
ESE
10
0.6
ESE
10
0.6
ESE
10
0.6
ESE
10
Energy kJ
12
34
34
50
38
38
37
987
562
450
306
220
138
84
46
23
42
41
59
58
57
67
65
64
Swell 2
Height (m)
Direction
Period (s)
0.4
ESE
10
0.1
E
9
0.1
E
9
0.1
E
9
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
SSW
7
0.5
S
6
0.4
SW
6
0.3
SSE
6
0.3
S
6
0.3
S
6
0.3
S
5
0.3
S
5
Energy kJ
37
2
2
2
38
33
32
38
38
38
39
42
42
18
20
10
6
6
5
5
5
Swell 3
Height (m)
Direction
Period (s)
0.3
SSE
6
0.3
SSE
6
0.3
SSE
6
0.3
SSE
6
0.2
SSW
6
0.1
SW
7
0.1
SW
7
Energy kJ
8
8
8
7
4
2
2
Wind waves
Height (m)
Direction
Period (s)
0.8
SSW
5
0.8
SSW
5
1.1
SSW
5
1.7
SSW
6
2.4
SSW
7
3.5
SSW
8
3
SSW
9
3
SSW
9
1
W
4
1.1
W
4
1.3
W
5
1.2
WNW
5
1
WNW
4
0.6
WNW
4
0.5
W
4
0.3
W
3
0.2
W
3
Energy kJ
28
26
62
187
512
1412
1341
1244
38
48
71
66
39
13
7
2
1
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
2
4
2
4
3
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
0
0
279
1479
1492
183
183
82
64
63
82
63
55
0
0
0
0
0
229
51
0
0
0
0
Best forecast wave conditions in Shikoku
Rating
(10 max)
1
1
4
3
2
4
2
1
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
4
3
4
3
2
4
2
1
1
1
1
1
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
4
4
4
4
4
4
5
4
4
4
4
4
5
5
5
4
5
4
5
5
5
5
5
4
  • 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

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