Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 8 am Saturday 02 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
21.4° C
(Which is 1.5°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 5PM is: 1.1m 5s primary swell from a Southwest direction and 0.4m 10s secondary swell from a East-southeast direction (forecast issued at 08:00am May 02). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (02 May)1.5ft (0.4m)10s
Afternoon (02 May)1.5ft (0.4m)10s
Evening (02 May)3.5ft (1.0m)5s

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 47mm), heaviest during Sun night. Warm (max 22°C on Sun night, min 12°C on Mon night). Winds increasing (calm on Sat afternoon, fresh winds from the S by Sun night).

Saturday
2
Sunday
3
Monday
4
Tue
5
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
1
1
1
1
1
0
1
1
0
0
0
0
!
2
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)
0.9
SW
7
0.4
SE
10
0.4
SE
10
0.4
ESE
10
1.2
SW
5
1
SW
5
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.8
SSW
5
1.1
SSW
5
1.6
SSW
6
2.1
SSW
7
3
SSW
8
3.5
SSW
9
3
SSW
9
2.5
SW
9
1.9
SSW
8
1.6
SSW
8
1.4
SSW
8
1.2
SSW
8
1.1
SSW
7
0.7
SW
7
0.6
SSW
7
Wave Graph
Metric surfscale
Energy kJ
67
32
25
40
74
51
38
38
37
34
59
172
395
1174
1765
1581
1124
483
330
243
165
125
54
42
Wind (km/h)
10
NNW
5
WNW
10
S
0
SE
5
ENE
5
NNE
5
NNE
5
NNE
5
NE
5
ESE
0
SE
15
SSW
20
SSW
35
S
25
SSW
15
WSW
20
W
20
W
25
W
30
W
20
WNW
10
N
10
NW
10
NW
off
glassy
on
glassy
cross-off
cross-off
cross-off
cross-off
glassy
glassy
glassy
on
on
on
cross-on
cross
cross
cross
cross
cross
cross-off
off
cross-off
cross-off
High Tide
5:37AM1.76m
6:45PM1.76m
6:02AM1.75m
7:20PM1.72m
6:27AM1.73m
7:55PM1.66m
Low Tide
12:09PM0.18m
00:23AM0.80m
12:39PM0.17m
00:51AM0.86m
1:11PM0.20m
1:19AM0.93m
part cloud
clear
clear
cloud
part cloud
part cloud
cloud
part cloud
cloud
cloud
light rain
light rain
mod rain
heavy rain
heavy rain
light rain
part cloud
part cloud
clear
clear
clear
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:15
5:13
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:47
6:49
6:49
6:50
1
2
7
21
13
3
Temp °C
14
19
21
21
21
18
17
17
18
19
19
20
20
22
22
21
18
19
20
20
17
14
13
12
11
17
19
21
21
17
16
16
18
20
21
20
19
20
22
22
16
15
15
13
12
11
11
10
Swell 1
Height (m)
Direction
Period (s)
0.9
SW
7
0.6
SW
6
0.4
SE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.7
SW
5
0.5
SSW
4
0.4
ESE
10
0.4
ESE
9
0.4
ESE
9
0.5
ESE
9
0.5
ESE
10
0.4
ESE
10
0.4
ESE
10
3
SSW
9
2.4
SSW
9
1.9
SSW
8
1.6
SSW
8
1.4
SSW
8
1.2
SSW
8
1.1
SSW
7
0.7
SW
7
0.6
SSW
7
Energy kJ
67
32
25
40
40
39
22
10
37
34
34
50
54
38
38
1233
834
483
330
243
165
125
54
35
Swell 2
Height (m)
Direction
Period (s)
0.4
ESE
10
0.4
SE
10
0.2
E
8
0.4
ESE
10
0.4
ESE
10
0.1
E
9
0.2
E
9
0.3
E
10
0.2
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
Energy kJ
38
25
5
38
38
2
6
16
7
37
38
32
33
38
37
38
41
42
Swell 3
Height (m)
Direction
Period (s)
0.2
E
9
0.2
E
8
0.4
SE
7
0.4
SE
7
0.4
SSE
7
Energy kJ
7
6
12
14
15
Wind waves
Height (m)
Direction
Period (s)
0.6
NW
4
0.5
SW
6
0.8
SW
4
1.2
SW
5
1
SW
5
0.8
SW
5
0.6
SW
4
0.5
SSW
4
0.8
SSW
5
1.1
SSW
5
1.6
SSW
6
2.1
SSW
7
3
SSW
8
3.5
SSW
9
3
SSW
9
2.5
SW
9
1.1
W
4
1.1
W
4
1.1
W
4
1.1
WNW
5
0.8
WNW
4
0.5
W
4
0.3
WNW
3
Energy kJ
11
17
18
74
51
34
16
11
25
59
172
395
1174
1765
1581
1124
48
48
50
48
19
7
2
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
4
3
4
3
4
2
2
2
1
1
1
Distance (km)
0
0
51
0
0
0
0
0
55
0
0
453
453
183
183
82
55
63
63
82
63
0
0
0
Best forecast wave conditions in Shikoku
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
4
4
4
4
2
2
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
1
1
1
1
1
2
1
1
4
4
4
4
4
4
2
2
1
1
1
Header Global
Rating
(10 max)
5
5
5
5
5
4
4
4
4
4
4
4
4
5
5
4
4
4
4
4
5
5
5
5
  • 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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