Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 8 pm Saturday 16 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 normal for this time of year)

How big are the waves at Niyodo Rivermouth today?

The current surf forecast for Niyodo Rivermouth at 1AM is: 0.9m 8s primary swell from a East-southeast direction and 0.3m 10s secondary swell from a Southeast direction (forecast issued at 08:00pm May 16). The wind direction is predicted to be offshore.

Time (JST) & DateWave HeightWave Period
Morning (17 May)3ft (0.9m)8s
Afternoon (17 May)3ft (0.9m)9s
Evening (17 May)3ft (0.9m)9s

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 Tue afternoon. Warm (max 24°C on Mon morning, min 17°C on Sat night). Wind will be generally light.

Sat
16
Sunday
17
Monday
18
Tuesday
19
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
12 PM
3 PM
Rating
(10 max)
0
1
1
1
1
1
0
0
1
1
1
1
1
0
0
0
0
1
1
1
1
1
0
0
Swell
Height Map
Height MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
0.9
ESE
9
0.9
ESE
9
0.9
ESE
9
0.9
ESE
9
0.9
ESE
9
0.9
ESE
9
0.8
ESE
9
0.7
ESE
9
0.8
ESE
9
0.9
ESE
9
0.9
ESE
9
0.8
ESE
9
0.8
ESE
9
0.9
ESE
9
0.8
ESE
8
0.7
ESE
9
0.9
ESE
10
0.8
ESE
10
Wave Graph
Metric surfscale
Energy kJ
125
122
127
125
127
103
131
131
106
108
111
111
92
84
106
113
111
103
99
106
96
79
140
111
Wind (km/h)
5
S
5
NNW
5
N
10
N
5
N
5
SSW
10
SSE
10
SSE
5
SSE
5
NNE
5
N
5
N
5
N
5
S
10
S
10
S
5
SSE
5
NNE
5
NNE
5
NNE
5
NNE
5
SSW
10
SSE
20
SE
on
glassy
off
off
off
glassy
on
on
glassy
off
off
glassy
off
on
on
on
on
cross-off
off
off
off
glassy
on
cross-on
High Tide
6:02PM1.88m
5:20AM1.87m
6:51PM1.90m
5:58AM1.88m
7:41PM1.85m
6:39AM1.85m
Low Tide
11:42PM0.77m
12:04PM-0.07m
00:25AM0.84m
12:48PM-0.10m
1:09AM0.92m
1:36PM-0.06m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:03
5:03
5:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:58
6:59
7:00
7:00
Temp °C
21
20
19
17
17
22
23
23
22
19
19
18
19
23
24
24
22
20
19
18
18
23
24
22
22
22
20
17
16
22
22
23
24
20
19
18
19
23
24
24
23
21
20
18
18
23
24
21
Swell 1
Height (m)
Direction
Period (s)
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
0.9
ESE
9
0.9
ESE
9
0.9
ESE
9
0.9
ESE
9
0.9
ESE
9
0.9
ESE
9
0.8
ESE
9
0.7
ESE
9
0.8
ESE
9
0.9
ESE
9
0.9
ESE
9
0.8
ESE
9
0.8
ESE
9
0.9
ESE
9
0.8
ESE
8
0.7
ESE
9
0.9
ESE
10
0.8
ESE
10
Energy kJ
125
122
127
125
127
103
131
131
106
108
111
111
92
84
106
113
111
103
99
106
96
79
140
111
Swell 2
Height (m)
Direction
Period (s)
0.3
SE
10
0.3
SE
12
0.4
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.1
SE
10
0.1
SE
10
0.3
SE
12
0.3
SE
11
0.3
SE
12
0.3
SE
12
0.3
SE
12
0.3
SE
12
0.3
SE
12
0.1
SE
10
0.1
SE
10
0.3
SE
12
0.4
SE
11
0.4
SE
11
0.4
SE
11
0.5
SE
11
0.5
E
8
0.3
E
8
Energy kJ
17
22
28
17
17
17
4
4
24
19
23
23
23
23
23
4
4
21
31
30
30
55
33
10
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
15
0.1
SE
15
0.1
S
6
0.1
SE
14
0.1
SE
14
0.1
SE
14
0.1
SE
14
0.1
SE
14
0.1
SE
10
0.1
SE
10
0.1
SE
10
0.1
SE
12
0.1
SE
12
0.3
ESE
3
0.2
E
10
Energy kJ
9
9
1
8
8
8
7
7
4
4
4
6
6
2
8
Wind waves
Height (m)
Direction
Period (s)
0.2
ESE
2
0.2
NNE
2
0.6
ESE
4
0.8
ESE
5
Energy kJ
1
1
13
33
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
29
0
0
0
0
0
85
58
0
0
0
0
0
29
58
58
58
0
0
0
0
0
29
29
Best forecast wave conditions in Shikoku
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
Header Global
Rating
(10 max)
5
5
5
6
5
4
4
4
6
9
9
7
4
4
5
7
5
4
5
5
4
4
4
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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