Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 8 am 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
21.1° 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 5PM is: 0.9m 9s primary swell from a East-southeast direction and 0.3m 11s secondary swell from a Southeast direction (forecast issued at 08:00am May 16). The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (16 May)3.5ft (1.0m)9s
Afternoon (16 May)3ft (0.9m)9s
Evening (16 May)3ft (0.9m)8s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

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

Saturday
16
Sunday
17
Monday
18
Tue
19
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
0
0
0
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0
0
1
1
1
1
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)
1
ESE
9
1
ESE
9
1
ESE
9
0.9
ESE
9
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
0.8
ESE
9
0.9
ESE
9
0.8
ESE
9
0.8
ESE
9
0.9
ESE
9
Wave Graph
Metric surfscale
Energy kJ
169
169
169
140
125
122
127
125
125
127
131
131
106
106
111
111
92
84
108
106
113
103
101
108
Wind (km/h)
5
N
5
S
10
S
10
S
5
S
5
N
5
N
5
N
5
N
5
SSW
10
S
10
SSE
0
ESE
5
N
5
N
5
NNW
5
N
5
S
10
S
10
S
5
S
5
NNE
5
NNE
5
NNE
off
on
on
on
glassy
off
off
off
off
glassy
on
on
glassy
off
off
glassy
off
glassy
on
on
glassy
cross-off
off
cross-off
High Tide
4:44AM1.84m
6:02PM1.88m
5:20AM1.87m
6:51PM1.90m
5:58AM1.88m
7:41PM1.85m
Low Tide
11:21AM0.03m
11:42PM0.77m
12:04PM-0.07m
00:25AM0.84m
12:48PM-0.10m
1:09AM0.92m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:03
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
18
21
22
22
21
19
18
17
17
23
23
23
22
19
19
18
18
23
24
24
22
20
19
18
19
22
22
22
22
20
18
17
17
24
22
23
24
20
19
18
18
23
24
24
23
21
20
18
Swell 1
Height (m)
Direction
Period (s)
1
ESE
9
1
ESE
9
1
ESE
9
0.9
ESE
9
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
0.8
ESE
9
0.9
ESE
9
0.8
ESE
9
0.8
ESE
9
0.9
ESE
9
Energy kJ
169
169
169
140
125
122
127
125
125
127
131
131
106
106
111
111
92
84
108
106
113
103
101
108
Swell 2
Height (m)
Direction
Period (s)
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
10
0.3
SE
12
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
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
12
0.1
SE
10
0.3
SE
12
0.4
SE
11
0.3
SE
11
Energy kJ
19
19
18
19
17
22
16
17
17
16
16
4
24
19
23
23
23
22
23
6
4
21
31
19
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
15
0.1
SE
15
0.1
SE
15
0.1
SE
15
0.1
SE
15
0.1
SE
15
0.1
S
6
0.1
SE
14
0.1
SE
14
0.2
ESE
14
0.1
SE
14
0.1
SE
14
0.1
SE
10
0.1
SE
10
0.1
SE
10
0.1
SE
10
0.1
SE
12
Energy kJ
9
9
9
9
9
9
1
8
8
19
7
7
4
4
4
4
6
Wind waves
Height (m)
Direction
Period (s)
0.1
SW
6
Energy kJ
1
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)
0
82
82
58
0
0
0
0
0
0
85
61
0
0
0
0
0
0
51
51
0
0
0
0
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
2
2
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
5
5
5
5
4
5
6
6
5
4
5
4
7
9
9
4
4
4
4
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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