Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 8 pm Monday 25 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
22.0° C
(Which is slightly warmer than usual)

How big are the waves at Niyodo Rivermouth today?

The current surf forecast for Niyodo Rivermouth at 3AM is: 1.2m 8s primary swell from a East-southeast direction and 0.3m 6s secondary swell from a South direction (forecast issued at 08:00pm May 25). The wind direction is predicted to be offshore and the swell rating is 2.

Time (JST) & DateWave HeightWave Period
Morning (26 May)3.5ft (1.1m)8s
Afternoon (26 May)4.5ft (1.3m)8s
Evening (26 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

Heavy rain (total 49mm), heaviest during Wed afternoon. Warm (max 24°C on Thu afternoon, min 19°C on Mon night). Wind will be generally light.

Mon
25
Tuesday
26
Wednesday
27
Thursday
28
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)
1
2
2
2
1
1
0
0
0
0
1
2
1
1
0
0
0
0
1
2
2
3
3
1
Swell
Height Map
Height MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.5
ESE
8
1.5
ESE
8
1.3
ESE
8
1.2
ESE
8
1.1
ESE
8
1.1
ESE
8
1.3
ESE
8
1.3
ESE
8
1.3
ESE
7
0.9
ESE
8
1.2
ESE
8
1.2
ESE
9
1.1
ESE
9
1
ESE
9
1.1
ESE
9
1.1
ESE
8
1.2
ESE
8
1.4
ESE
5
1.6
ESE
5
1.7
ESE
6
1.9
SSE
7
1.6
S
7
1.6
SW
7
1.1
SSW
7
Wave Graph
Metric surfscale
Energy kJ
300
293
240
202
171
171
206
201
158
94
190
208
188
166
176
160
188
95
149
204
366
239
261
127
Wind (km/h)
5
SSE
5
E
5
NE
5
NNE
5
N
5
SSE
10
SSE
15
SSE
10
SE
10
ESE
5
E
5
NE
5
NE
5
E
10
SE
10
SSE
10
ESE
10
E
10
ENE
10
ENE
10
E
5
ESE
5
S
5
SSW
on
glassy
glassy
off
off
glassy
on
cross-on
cross-on
cross-on
cross
glassy
glassy
cross
cross-on
on
cross-on
cross
cross-off
cross-off
cross
glassy
glassy
on
High Tide
2:21AM1.55m
3:04PM1.44m
2:57AM1.59m
4:01PM1.52m
3:30AM1.62m
Low Tide
7:54PM0.74m
8:51AM0.68m
8:51PM0.81m
9:34AM0.53m
9:39PM0.85m
10:10AM0.40m
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
rain showers
rain showers
light rain
cloud
cloud
light rain
light rain
light rain
mod rain
mod rain
light rain
mod rain
mod rain
light rain
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:58
4:58
4:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:05
7:05
7:06
7:07
1
1
1
1
1
4
9
7
5
8
9
2
Temp °C
22
21
20
19
19
23
23
23
23
22
21
21
21
21
21
20
20
19
19
20
21
23
23
24
24
23
22
20
20
24
23
23
24
23
23
23
23
23
22
21
21
20
20
21
23
27
27
28
Swell 1
Height (m)
Direction
Period (s)
1.5
ESE
8
1.5
ESE
8
1.3
ESE
8
1.2
ESE
8
1.1
ESE
8
1.1
ESE
8
0.1
SE
15
0.1
SE
15
1.3
ESE
7
0.9
ESE
8
1.2
ESE
8
1.2
ESE
9
1.1
ESE
9
0.2
ESE
15
0.1
SE
11
0.3
SE
10
0.4
SE
10
0.3
SSW
5
0.5
S
6
1
SSW
7
1.9
SSE
7
1.6
S
7
1.1
SSW
7
1.1
SSW
7
Energy kJ
300
293
240
202
171
171
9
9
158
94
190
208
188
21
5
17
26
4
18
91
336
239
124
127
Swell 2
Height (m)
Direction
Period (s)
0.1
SW
6
0.1
S
6
0.3
S
6
0.3
S
6
0.3
SSE
6
0.2
SSE
6
0.1
E
12
0.1
E
12
0.2
ESE
15
0.1
SE
15
0.1
SE
15
0.1
SE
15
0.1
SE
15
0.2
ESE
10
0.2
ESE
15
0.2
ESE
14
0.2
ESE
14
0.2
ESE
14
0.2
ESE
14
0.3
SE
10
0.5
E
8
1
E
7
0.9
SSE
6
0.9
SE
6
Energy kJ
1
1
7
7
8
3
3
3
22
9
9
9
9
10
21
21
20
19
19
16
37
112
74
59
Swell 3
Height (m)
Direction
Period (s)
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
13
0.1
E
12
0.1
SE
12
0.1
SE
12
0.1
SE
12
0.1
S
11
0.1
SE
11
0.1
SE
11
0.1
SE
10
0.1
SW
6
0.1
SW
6
0.2
ESE
14
0.3
SE
10
0.3
SE
10
0.8
E
8
0.7
E
8
Energy kJ
5
5
5
5
3
3
6
6
6
2
5
5
4
2
2
19
16
16
76
63
Wind waves
Height (m)
Direction
Period (s)
1.3
ESE
8
1.3
ESE
8
1.1
ESE
6
0.8
ESE
6
0.6
E
5
1
ESE
9
1.1
ESE
9
1.1
ESE
8
1.2
ESE
8
1.4
ESE
5
1.6
ESE
5
1.7
ESE
6
1.9
S
7
1.5
SSW
7
1.6
SW
7
Energy kJ
206
201
82
43
20
166
176
160
188
95
149
204
366
209
261
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
2
1
1
1
1
1
1
1
2
1
1
2
1
1
2
1
2
1
3
3
2
Distance (km)
58
0
0
0
0
0
82
432
29
29
29
0
0
29
29
58
29
224
0
0
183
0
0
51
Best forecast wave conditions in Shikoku
Rating
(10 max)
2
2
2
2
2
1
1
1
1
1
2
1
1
2
1
1
1
2
3
3
3
Best forecast wave conditions in Japan
Rating
(10 max)
2
2
2
2
2
1
1
2
1
2
1
2
1
2
2
2
1
3
1
2
2
3
3
3
Header Global
Rating
(10 max)
5
4
4
4
4
4
5
5
9
9
9
5
6
7
7
7
8
9
9
7
6
9
7
9
  • 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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