Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 2 pm Saturday 30 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
23.1° C
(Which is 1.1°C warmer than normal for this time of year)

How big are the waves at Niyodo Rivermouth today (30 May):

  • Afternoon surf: Afternoon surf (30 May, local time) - 2ft (0.6m), 10s period with E swell.
  • Evening surf: Evening surf (30 May, local time) - 2ft (0.6m), 11s period with E swell.

The current surf forecast for Niyodo Rivermouth at 6PM is: 0.6m 11s primary swell from a East direction and 0.3m 5s secondary swell from a South-southeast direction (forecast issued at 02:00pm May 30). The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (30 May)--
Afternoon (30 May)2ft (0.6m)10s
Evening (30 May)2ft (0.6m)11s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 15mm), heaviest on Tue morning. Warm (max 25°C on Sat afternoon, min 19°C on Sun night). Wind will be generally light.

Sat
30
Sunday
31
Monday
1
Tue
2
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
6 AM
9 AM
Rating
(10 max)
0
0
1
1
1
2
2
2
3
1
2
3
3
3
3
3
2
2
2
2
2
3
4
4
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.6
E
12
0.6
E
10
0.6
E
11
0.6
E
11
0.6
E
11
0.5
S
16
0.7
S
14
0.9
S
14
1.1
S
13
1.2
S
12
1.3
S
12
1.2
S
12
1.2
S
12
1.2
S
15
1
S
14
1.7
S
14
1.8
S
13
2.4
S
16
2.5
S
15
2.5
S
15
2.5
S
14
2.5
SSW
14
2.5
SSW
14
2.5
S
14
Wave Graph
Metric surfscale
Energy kJ
98
77
89
88
88
124
203
293
398
439
488
411
384
657
399
1127
1121
2732
2872
2679
2643
2376
2212
2291
Wind (km/h)
10
S
10
S
5
S
5
NNE
5
N
5
NNW
5
NNE
5
S
5
SW
10
SSW
10
S
5
S
5
SSW
0
N
5
NNE
5
SSE
15
SSE
15
SSE
10
SE
10
SE
10
SE
5
E
0
NE
5
NE
on
on
glassy
glassy
off
glassy
glassy
glassy
glassy
on
on
glassy
glassy
glassy
glassy
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross
glassy
cross-off
High Tide
6:04PM1.68m
5:02AM1.68m
6:40PM1.69m
5:34AM1.69m
7:15PM1.68m
6:07AM1.69m
Low Tide
11:33PM0.93m
11:50AM0.19m
00:06AM0.95m
12:24PM0.17m
00:38AM0.97m
clear
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
clear
clear
clear
cloud
part cloud
clear
clear
clear
part cloud
cloud
light rain
light rain
light rain
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:56
4:56
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:07
7:08
7:08
7:09
1
2
2
2
3
Temp °C
25
25
24
22
21
21
21
24
24
25
23
21
20
20
19
22
23
23
22
21
19
19
19
19
24
25
26
24
22
22
22
25
25
24
23
23
22
23
21
23
23
23
22
22
20
21
21
21
Swell 1
Height (m)
Direction
Period (s)
0.6
E
12
0.6
E
10
0.6
E
11
0.6
E
11
0.6
E
11
0.7
ESE
11
0.7
S
14
0.9
S
14
1.1
S
13
1.2
S
12
1.3
S
12
1.2
S
12
1.3
SSE
6
1.2
S
15
1.1
S
11
1.7
S
14
1.8
S
13
2.4
S
16
2.5
S
15
2.5
S
15
2.5
S
14
2.5
SSW
14
2.5
SSW
14
2.5
S
14
Energy kJ
98
77
89
88
88
105
203
293
398
439
488
411
127
657
289
1127
1121
2732
2872
2679
2643
2376
2212
2291
Swell 2
Height (m)
Direction
Period (s)
0.3
SSE
6
0.3
SSE
6
0.3
SSE
5
0.3
SSE
5
0.3
SSE
5
0.5
S
16
0.8
ESE
11
0.8
ESE
11
0.7
ESE
11
0.6
E
11
0.6
E
11
0.6
S
16
1.2
S
12
1.2
SSE
6
1
SSE
6
0.9
SSW
18
1.4
SSW
16
0.5
E
10
0.5
E
10
0.5
E
10
0.5
E
10
0.4
E
10
0.5
ESE
10
0.3
SE
12
Energy kJ
6
6
6
5
5
124
135
135
103
85
85
181
384
114
80
540
976
53
50
50
49
30
58
23
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
9
0.1
SE
7
0.1
SE
9
0.3
SE
7
0.2
S
16
0.1
SE
9
0.3
SSE
9
0.2
SSE
9
0.2
SSE
9
0.1
SE
9
0.3
SE
12
0.6
E
11
0.9
S
15
0.9
SSE
11
1
S
14
0.9
SSE
6
0.5
E
10
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
12
0.3
SE
11
Energy kJ
3
2
3
7
20
3
15
8
8
3
22
85
381
194
399
65
54
19
19
20
22
20
Wind waves
Height (m)
Direction
Period (s)
0.6
S
3
1.1
SSE
5
0.7
SE
6
0.4
ESE
10
Energy kJ
8
72
32
31
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
2
2
2
3
3
2
3
3
3
3
3
4
4
5
4
4
4
4
4
Distance (km)
330
58
0
0
0
0
0
0
0
51
55
0
0
0
0
82
58
58
29
29
29
29
0
0
Best forecast wave conditions in Shikoku
Rating
(10 max)
1
1
1
1
2
2
2
3
3
2
3
3
3
3
3
4
4
5
4
4
4
4
4
Best forecast wave conditions in Japan
Rating
(10 max)
1
2
1
1
1
2
2
2
3
3
2
3
3
3
3
4
4
4
5
4
4
4
4
4
Header Global
Rating
(10 max)
5
5
5
5
6
8
7
7
7
7
7
6
6
5
5
5
5
5
5
4
4
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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