Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 8 am 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
21.5° C
(Which is normal for this time of year)

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

  • Morning surf: Morning surf (30 May, local time) - 1.5ft (0.5m), 10s period with E swell.
  • 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 1PM is: 0.6m 11s primary swell from a East direction and 0.3m 6s secondary swell from a South-southeast direction (forecast issued at 08:00am May 30). The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (30 May)1.5ft (0.5m)10s
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

Some drizzle, heaviest during Mon night. Warm (max 25°C on Sat morning, min 18°C on Sun night). Wind will be generally light.

Saturday
30
Sunday
31
Monday
1
Tue
2
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
1
1
1
2
2
2
0
2
3
3
3
4
4
4
3
2
3
3
4
5
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)
0.5
E
10
0.5
E
10
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
1.3
S
12
1.4
S
12
1.3
S
12
1.3
S
12
1.1
S
15
1.2
S
14
1.8
S
14
1.6
SSW
15
2.5
S
15
2.5
S
15
2.5
SSW
15
2.5
S
15
2.5
S
14
Wave Graph
Metric surfscale
Energy kJ
47
48
98
77
89
88
88
124
203
293
408
513
565
480
449
538
581
1263
1232
2686
3023
2877
3114
3029
Wind (km/h)
10
N
0
SW
10
S
10
S
5
S
5
NNE
5
N
5
N
5
NNE
0
WNW
20
S
5
S
5
SSW
5
SSE
5
NNE
5
NNE
5
NE
0
S
10
S
15
SSE
10
SE
10
ESE
5
ESE
5
NE
off
glassy
on
on
glassy
glassy
glassy
off
off
glassy
on
on
glassy
glassy
glassy
glassy
glassy
glassy
on
cross-on
cross-on
cross
cross
glassy
High Tide
4:31AM1.67m
6:04PM1.68m
5:02AM1.68m
6:40PM1.69m
5:34AM1.69m
7:15PM1.68m
Low Tide
11:17AM0.23m
11:33PM0.93m
11:50AM0.19m
00:06AM0.95m
12:24PM0.17m
00:38AM0.97m
clear
clear
clear
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
clear
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:56
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
Temp °C
19
24
25
25
24
22
21
21
21
23
22
22
22
20
19
18
18
21
23
23
22
21
20
20
18
24
24
25
26
24
22
22
21
25
21
23
24
21
21
19
19
23
23
22
22
22
21
22
Swell 1
Height (m)
Direction
Period (s)
0.5
E
10
0.5
E
10
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
1.3
S
12
1.4
S
12
1.3
S
12
1.3
S
12
1.1
SSE
11
1.2
S
14
1.8
S
14
1.7
S
13
2.5
S
15
2.5
S
15
2.5
SSW
15
2.5
S
15
2.5
S
14
Energy kJ
47
48
98
77
89
88
88
105
203
293
408
513
565
480
449
303
581
1263
976
2686
3023
2877
3114
3029
Swell 2
Height (m)
Direction
Period (s)
0.3
SSE
6
0.3
SSE
6
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
0.8
ESE
11
0.6
ESE
11
0.6
E
11
0.7
S
16
0.9
S
16
1.1
S
15
1.1
S
11
1
SSW
18
1.6
SSW
15
0.5
E
10
0.5
E
10
0.5
E
10
0.4
E
10
0.4
E
10
Energy kJ
6
6
6
6
6
5
5
124
135
135
149
91
85
248
401
538
286
655
1232
53
50
49
30
30
Swell 3
Height (m)
Direction
Period (s)
0.3
ESE
12
0.3
ESE
12
0.1
SE
9
0.1
SE
7
0.1
SE
9
0.2
SSE
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
ESE
11
0.6
E
10
0.6
SSW
19
0.9
SSW
18
0.6
ESE
10
0.5
ESE
10
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
11
Energy kJ
28
29
3
2
3
4
20
3
15
8
8
3
22
90
74
280
528
85
59
19
19
20
20
20
Wind waves
Height (m)
Direction
Period (s)
0.4
NE
4
0.4
NE
4
0.7
SE
6
0.8
SE
6
Energy kJ
4
3
30
46
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
2
2
2
3
3
3
3
3
4
4
4
4
5
5
5
5
5
Distance (km)
0
0
330
58
0
0
0
0
0
0
253
51
0
0
0
0
0
0
82
29
29
29
29
0
Best forecast wave conditions in Shikoku
Rating
(10 max)
1
1
1
1
1
1
2
2
2
3
3
3
3
4
4
4
4
5
5
5
5
5
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
2
2
1
1
1
2
2
2
3
3
3
3
3
4
4
4
4
5
5
5
5
5
Header Global
Rating
(10 max)
5
5
5
5
5
5
6
8
7
7
7
7
6
6
5
5
5
5
5
5
5
4
5
8
  • 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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