Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 2 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 6AM is: 0.9m 7s primary swell from a Southwest direction and 0.4m 10s secondary swell from a East-southeast direction (forecast issued at 02:00am May 02). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be 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 (1.1m)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 46mm), heaviest during Sun night. Warm (max 22°C on Sun night, min 12°C on Mon night). Winds increasing (calm on Sat afternoon, strong winds from the SSW by Sun night).

Saturday
2
Sunday
3
Monday
4
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
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
1
1
1
1
0
1
1
1
1
1
1
1
1
0
0
0
0
!
!
1
0
0
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>
Wave
Height (m)
Direction
Period (s)
1.6
WSW
5
1
SW
7
0.9
SW
7
0.4
SE
10
0.4
ESE
10
0.4
ESE
10
1.3
SW
5
1.1
SW
5
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.8
SSW
5
1
SSW
5
1.4
SSW
6
2
SSW
6
3
SSW
8
3.5
SSW
8
3
SSW
9
3
SW
9
1.9
SSW
8
1.7
SSW
8
1.4
SSW
8
1.2
SSW
8
0.9
SSW
8
Wave Graph
Metric surfscale
Energy kJ
133
100
67
32
39
40
92
58
38
38
37
34
49
126
329
998
1778
1324
1292
510
380
264
174
91
Wind (km/h)
10
WNW
10
N
10
NNW
5
WNW
10
S
0
S
5
ENE
5
NNE
5
NNE
5
NNE
5
NE
0
SE
5
S
15
SSW
25
SSW
40
SSW
25
SW
15
WSW
20
W
20
W
25
W
30
WNW
25
WNW
15
N
cross-off
off
off
glassy
on
glassy
cross-off
glassy
glassy
cross-off
glassy
glassy
glassy
on
on
on
cross-on
cross-on
cross
cross
cross
cross-off
cross-off
off
High Tide
5:37AM1.76m
6:45PM1.76m
6:02AM1.75m
7:20PM1.72m
6:27AM1.73m
7:55PM1.66m
Low Tide
11:55PM0.74m
12:09PM0.18m
00:23AM0.80m
12:39PM0.17m
00:51AM0.86m
1:11PM0.20m
clear
clear
part cloud
clear
part cloud
cloud
part cloud
cloud
part cloud
part cloud
cloud
cloud
light rain
light rain
light rain
heavy rain
heavy rain
light rain
part cloud
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:15
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:47
6:49
6:49
1
1
5
23
15
1
Temp °C
15
13
13
19
21
21
21
19
17
17
18
19
19
20
21
22
22
21
19
19
20
18
17
14
13
10
10
17
19
21
21
19
17
17
18
20
20
20
20
19
22
22
18
16
14
12
12
11
Swell 1
Height (m)
Direction
Period (s)
0.4
SE
10
1
SW
7
0.9
SW
7
0.6
SW
6
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.7
SW
5
0.6
SSW
4
0.4
ESE
10
0.4
ESE
9
0.4
ESE
9
0.5
ESE
9
0.5
ESE
10
0.5
ESE
10
0.4
ESE
10
0.4
ESE
10
2.5
SSW
9
1.9
SSW
8
1.7
SSW
8
1.4
SSW
8
1.2
SSW
8
0.9
SSW
8
Energy kJ
24
100
67
32
39
40
40
39
23
12
37
34
34
50
54
55
38
37
898
510
380
264
174
91
Swell 2
Height (m)
Direction
Period (s)
0.2
E
9
0.4
SE
10
0.4
ESE
10
0.4
SE
10
0.2
E
8
0.4
ESE
10
0.4
ESE
10
0.1
E
9
0.1
E
9
0.2
E
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
6
24
38
25
5
38
38
2
2
8
38
38
33
38
38
38
Swell 3
Height (m)
Direction
Period (s)
0.2
E
9
0.2
E
9
0.2
E
8
0.4
SE
7
Energy kJ
6
7
6
12
Wind waves
Height (m)
Direction
Period (s)
1.6
WSW
5
0.6
WNW
4
0.6
NW
4
0.5
SW
6
0.9
SW
4
1.3
SW
5
1.1
SW
5
0.8
SW
5
0.6
SSW
4
0.8
SSW
5
1
SSW
5
1.4
SSW
6
2
SSW
6
3
SSW
8
3.5
SSW
8
3
SSW
9
3
SW
9
1.1
W
5
1.2
W
5
1.3
WNW
5
1.2
WNW
5
0.8
WNW
4
Energy kJ
133
16
14
17
29
92
58
34
13
26
49
126
329
998
1778
1324
1292
50
68
75
59
26
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
3
4
4
3
3
2
2
1
Distance (km)
0
0
0
0
51
0
0
0
0
0
0
0
0
453
453
224
183
82
65
65
65
82
55
0
Best forecast wave conditions in Shikoku
Rating
(10 max)
2
1
1
1
1
1
1
1
1
1
1
1
1
4
4
3
3
2
2
1
Best forecast wave conditions in Japan
Rating
(10 max)
2
1
1
1
1
1
1
1
1
1
1
1
1
3
4
4
4
3
3
2
2
1
Header Global
Rating
(10 max)
5
5
5
5
5
5
5
4
4
4
4
4
4
4
4
4
5
4
4
4
4
4
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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