Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 2 am Wednesday 27 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
22.5° C
(Which is slightly warmer than usual)

How big are the waves at Niyodo Rivermouth today?

The current surf forecast for Niyodo Rivermouth at 10AM is: 1.1m 9s primary swell from a East-southeast direction and 0.4m 5s secondary swell from a South direction, 0.3m 10s secondary swell from a Southeast direction (forecast issued at 02:00am May 27). The wind direction is predicted to be cross-shore.

Time (JST) & DateWave HeightWave Period
Morning (27 May)3.5ft (1.1m)9s
Afternoon (27 May)7ft (2.1m)6s
Evening (27 May)4.5ft (1.4m)7s

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 48mm), heaviest during Wed afternoon. Warm (max 29°C on Fri afternoon, min 18°C on Fri night). Wind will be generally light.

Wednesday
27
Thursday
28
Friday
29
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)
0
1
1
1
0
0
3
2
2
2
2
1
0
1
1
1
1
1
1
1
1
1
1
1
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.7
ESE
8
1.2
ESE
9
1.2
ESE
9
1.1
ESE
9
1.7
ESE
5
2.1
ESE
6
1.9
SSW
7
1.4
SSW
7
1.3
SSW
7
1.3
SSW
7
1.2
S
7
1.1
S
7
1.1
S
7
1
S
7
1
S
7
1
S
7
1
S
6
1
S
6
0.9
SSW
6
0.7
SW
7
0.9
SW
7
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
Wave Graph
Metric surfscale
Energy kJ
72
203
222
189
159
344
326
197
166
176
142
117
117
92
89
86
81
84
70
46
65
32
33
33
Wind (km/h)
10
E
5
E
10
E
10
E
15
ESE
20
E
15
NE
10
N
5
NNE
5
NNW
0
NNW
5
S
10
SSE
5
SSW
5
ESE
5
NNE
5
NNW
5
NNW
5
NNW
10
NNW
10
NNW
10
NNW
5
ENE
5
NNE
cross
cross
cross
cross
cross
cross
cross-off
off
off
glassy
glassy
glassy
on
glassy
glassy
glassy
off
off
off
cross-off
cross-off
off
glassy
glassy
High Tide
2:57AM1.59m
4:01PM1.52m
3:30AM1.62m
4:47PM1.59m
4:01AM1.64m
5:27PM1.65m
Low Tide
9:34AM0.53m
9:39PM0.85m
10:10AM0.40m
10:21PM0.89m
10:44AM0.30m
light rain
light rain
light rain
light rain
heavy rain
heavy rain
mod rain
light rain
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:58
4:58
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:06
7:07
7:07
1
1
1
5
15
17
10
1
Temp °C
22
22
22
21
21
21
21
22
22
21
22
23
24
24
24
23
22
22
22
26
28
29
26
22
24
24
24
22
21
21
22
23
24
23
25
26
27
28
28
27
25
24
24
26
27
29
28
24
Swell 1
Height (m)
Direction
Period (s)
0.7
ESE
8
1.2
ESE
9
0.2
S
5
0.4
S
5
0.2
ESE
15
0.5
S
7
1.7
ESE
7
1.4
SSW
7
1.3
SSW
7
1.3
SSW
7
1.2
S
7
1.1
S
7
1.1
S
7
1
S
7
1
S
7
1
S
7
1
S
6
1
S
6
0.9
SSW
6
0.7
SW
7
0.7
SW
6
0.5
SW
7
0.5
SW
7
0.4
ESE
10
Energy kJ
72
203
2
7
21
24
265
186
166
176
142
117
117
92
89
86
81
84
70
46
43
23
23
33
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
15
0.1
SE
15
0.1
SE
15
0.3
SE
10
0.2
ESE
14
1.2
SSW
7
1.4
ESE
7
1.3
E
7
1
E
7
0.7
E
6
0.7
E
8
0.7
E
8
0.6
E
8
0.6
E
8
0.5
E
8
0.5
E
8
0.4
E
8
0.4
E
8
0.5
SSE
6
0.4
SSE
6
0.5
SSE
6
0.4
SSE
6
0.4
SSE
6
Energy kJ
9
9
9
17
20
139
197
161
86
39
60
68
48
49
33
34
21
21
21
13
22
14
12
Swell 3
Height (m)
Direction
Period (s)
0.1
S
11
0.1
SE
11
0.1
W
6
0.2
ESE
15
0.2
ESE
11
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.4
E
9
0.3
ESE
10
0.2
ESE
10
0.2
ESE
9
0.4
SE
10
0.4
SE
10
0.4
SE
9
0.4
SE
10
0.4
SE
10
0.4
E
8
0.4
ESE
10
0.4
ESE
10
0.4
ESE
10
0.4
SW
7
Energy kJ
2
5
1
21
11
17
16
16
23
19
9
9
23
23
23
23
23
21
39
32
33
12
Wind waves
Height (m)
Direction
Period (s)
0.9
ESE
6
0.9
ESE
5
1.2
ESE
9
1.1
ESE
9
1.7
ESE
5
2.1
ESE
6
1.9
SSW
7
1.1
E
7
0.2
WNW
2
0.3
NW
2
0.9
SW
7
0.4
SW
3
0.3
NNE
2
Energy kJ
56
42
222
189
159
344
326
123
1
1
65
2
1
Nearest Offshore or Glassy
Rating
(10 max)
1
1
2
2
2
1
3
2
2
2
2
1
2
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
29
29
29
29
224
224
0
0
0
0
0
0
51
0
0
0
0
0
0
0
0
0
0
0
Best forecast wave conditions in Shikoku
Rating
(10 max)
1
1
2
2
3
2
2
2
2
1
2
1
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
2
2
2
3
3
3
2
2
2
2
1
3
1
1
1
1
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
9
5
6
7
7
9
7
9
9
6
6
6
9
9
9
9
9
7
7
6
6
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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