Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 8 pm Saturday 23 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 1.1°C warmer than normal for this time of year)

How big are the waves at Niyodo Rivermouth today?

The current surf forecast for Niyodo Rivermouth at 4AM is: 2.4m 8s primary swell from a East-southeast direction (forecast issued at 08:00pm May 23). The wind direction is predicted to be glassy and the swell rating is 3.

Time (JST) & DateWave HeightWave Period
Morning (24 May)8ft (2.5m)8s
Afternoon (24 May)7.5ft (2.3m)8s
Evening (24 May)7ft (2.2m)9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 5mm), mostly falling on Sat night. Warm (max 24°C on Tue morning, min 20°C on Sat night). Wind will be generally light.

Sat
23
Sunday
24
Monday
25
Tuesday
26
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)
2
4
2
3
2
2
1
2
3
4
4
2
2
1
1
1
2
2
2
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)
2.5
ESE
9
2.2
ESE
9
2.1
ESE
9
2.3
ESE
8
2.5
E
8
2.5
E
8
2.5
ESE
8
2.3
ESE
8
2.3
E
9
2.2
E
9
2.1
E
8
1.6
ESE
8
1.6
ESE
9
1.4
ESE
9
1.4
ESE
9
1.4
ESE
9
1.4
ESE
8
1.2
ESE
8
1.2
ESE
8
1.1
ESE
8
1.1
ESE
8
1
ESE
8
1
ESE
8
1.1
ESE
9
Wave Graph
Metric surfscale
Energy kJ
949
741
677
686
857
899
867
737
798
715
630
376
349
304
304
268
262
217
217
180
184
151
154
202
Wind (km/h)
10
ESE
5
NE
5
E
5
NNE
5
E
10
E
10
SSE
10
SSE
5
SSE
0
NNE
5
NW
5
N
5
N
5
SSE
10
S
10
S
5
SSW
0
ESE
0
ENE
5
ENE
5
ENE
5
SSE
10
SSE
15
SE
cross
cross-off
cross
glassy
cross
cross
cross-on
cross-on
on
glassy
glassy
glassy
glassy
on
on
on
glassy
glassy
glassy
glassy
glassy
glassy
on
cross-on
High Tide
00:43AM1.51m
12:10PM1.37m
1:37AM1.53m
1:48PM1.38m
2:21AM1.55m
Low Tide
5:32PM0.52m
6:43AM0.98m
6:45PM0.65m
7:57AM0.84m
7:54PM0.74m
8:51AM0.68m
rain showers
rain showers
light rain
light rain
light rain
cloud
cloud
part cloud
part cloud
cloud
cloud
cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
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>
7:02
7:04
7:05
7:05
2
1
1
2
1
Temp °C
22
21
21
20
21
22
23
22
22
21
20
20
20
23
23
23
22
21
21
20
21
22
24
23
23
23
23
22
23
23
24
23
24
24
22
22
22
25
24
24
24
24
24
22
23
23
25
23
Swell 1
Height (m)
Direction
Period (s)
2.5
ESE
9
2.2
ESE
9
0.1
SW
7
2.3
ESE
8
2.1
ESE
9
2
ESE
8
1.8
ESE
8
1.6
ESE
8
1.6
ESE
9
1.4
ESE
9
1.4
ESE
9
1.4
ESE
9
1.4
ESE
8
1.2
ESE
8
1.2
ESE
8
1.1
ESE
8
1.1
ESE
8
1
ESE
8
1
ESE
8
0.2
E
12
Energy kJ
949
741
2
737
616
547
470
376
349
304
304
268
262
217
217
180
184
151
154
11
Swell 2
Height (m)
Direction
Period (s)
1
SSE
6
0.2
SSW
7
0.3
SSW
6
0.3
S
8
0.5
S
8
0.3
SSW
7
0.3
SSE
7
0.3
SSE
7
0.3
SSE
7
0.1
SW
6
0.1
E
16
0.4
SSE
7
0.4
SSE
7
0.1
E
16
0.1
E
16
0.2
E
12
0.1
SE
15
0.1
SE
15
Energy kJ
64
4
8
11
30
11
10
10
9
2
5
17
15
5
5
11
9
9
Swell 3
Height (m)
Direction
Period (s)
0.2
SSW
6
0.3
SSE
7
0.3
SSW
7
0.2
SSW
7
0.2
SSW
6
0.1
E
16
0.1
SW
6
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
12
Energy kJ
4
9
9
4
4
5
1
5
5
5
3
Wind waves
Height (m)
Direction
Period (s)
2
E
9
2.1
ESE
9
2.3
ESE
8
2.5
E
8
2.5
E
8
2.5
ESE
8
2.3
E
9
2.2
E
9
2.1
E
8
1.1
ESE
9
Energy kJ
627
677
686
857
899
867
798
715
630
202
Nearest Offshore or Glassy
Rating
(10 max)
4
4
3
3
2
3
1
3
4
4
4
2
2
3
1
2
2
2
2
1
1
1
1
2
Distance (km)
29
0
29
0
183
183
82
29
55
0
0
0
0
51
103
29
0
0
0
0
0
0
539
330
Best forecast wave conditions in Shikoku
Rating
(10 max)
4
4
3
3
1
4
4
4
4
2
2
3
1
2
2
2
2
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
4
4
3
3
2
4
4
4
4
4
4
2
2
3
2
2
2
2
2
1
1
1
2
2
Header Global
Rating
(10 max)
7
8
7
6
5
5
5
5
5
5
5
5
5
5
4
5
5
5
4
5
4
5
5
7
  • 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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