Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 2 am Monday 27 Apr 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
19.9° 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 9AM is: 1.1m 8s primary swell from a East-southeast direction and 0.6m 6s secondary swell from a South direction (forecast issued at 02:00am April 27). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (27 Apr)3.5ft (1.1m)8s
Afternoon (27 Apr)2.5ft (0.8m)7s
Evening (27 Apr)2ft (0.6m)7s

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 2mm), mostly falling on Wed afternoon. Warm (max 22°C on Mon morning, min 12°C on Wed night). Wind will be generally light.

Monday
27
Tuesday
28
Wednesday
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)
3
2
2
1
1
0
0
1
1
0
1
0
0
0
0
0
0
0
1
1
0
0
0
0
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
2.4
ESE
8
1.9
ESE
8
1.4
ESE
8
1.1
ESE
8
0.9
ESE
8
0.8
ESE
7
0.7
ESE
7
0.6
ESE
7
0.3
SE
12
0.5
E
7
0.3
SE
12
0.3
SE
12
0.3
SE
12
0.3
SE
12
0.2
ESE
12
0.6
SSW
5
0.7
SSW
5
0.7
SSW
6
0.7
SSW
6
0.8
SSW
6
0.6
SSW
6
0.6
SSW
6
0.4
SSW
5
0.3
SSW
5
Wave Graph
Metric surfscale
Energy kJ
745
430
210
147
99
73
55
42
27
27
27
23
23
22
14
17
28
31
35
40
26
21
11
5
Wind (km/h)
10
NNE
15
NNW
15
NW
10
NNW
5
WNW
10
SW
10
ESE
10
NNE
5
NNE
10
N
5
NNW
5
SSW
5
S
10
S
5
S
5
ENE
5
N
5
NNW
10
N
5
NW
10
NW
10
NW
10
NNW
10
NNW
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross
off
off
off
off
glassy
on
on
glassy
cross-off
off
off
off
cross-off
cross-off
cross-off
off
cross-off
High Tide
3:30AM1.59m
3:24PM1.52m
3:59AM1.65m
4:15PM1.62m
4:25AM1.69m
4:58PM1.70m
Low Tide
9:35AM0.78m
9:39PM0.57m
10:10AM0.61m
10:19PM0.59m
10:42AM0.45m
heavy rain
light rain
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
cloud
part cloud
clear
clear
clear
clear
part cloud
cloud
cloud
light rain
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:22
5:20
5:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:44
6:45
6:45
19
2
1
Temp °C
16
16
15
19
22
22
21
18
16
16
16
19
20
21
20
19
18
17
16
19
20
15
14
13
15
14
13
18
21
21
21
18
15
15
15
19
20
22
22
20
19
17
15
18
17
13
12
12
Swell 1
Height (m)
Direction
Period (s)
2.4
ESE
8
1.9
ESE
8
1.4
ESE
8
1.1
ESE
8
0.9
ESE
8
0.8
ESE
7
0.7
ESE
7
0.6
ESE
7
0.5
E
7
0.5
E
7
0.5
E
7
0.4
ESE
7
0.4
ESE
7
0.3
E
8
0.3
E
8
0.6
SSW
5
0.7
SSW
5
0.7
SSW
6
0.7
SSW
6
0.8
SSW
6
0.6
SSW
6
0.6
SSW
6
0.4
SSW
5
0.3
SSW
5
Energy kJ
745
430
210
147
99
73
55
42
27
27
27
18
18
10
10
17
28
31
35
40
26
21
11
5
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
13
0.1
SE
13
0.8
S
6
0.6
S
6
0.5
S
6
0.2
ESE
12
0.5
SW
4
0.5
SW
5
0.4
SSW
5
0.4
SSW
5
0.4
SW
5
0.3
SSW
5
0.3
SSW
5
0.3
SE
12
0.2
ESE
12
0.3
E
8
0.2
E
8
0.2
E
8
0.2
E
8
0.2
E
8
0.2
E
8
0.2
E
8
0.2
E
8
0.1
SE
6
Energy kJ
7
7
50
25
16
14
6
13
11
11
7
5
4
22
14
10
5
5
5
5
5
4
5
1
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
13
0.1
SE
13
0.1
SE
12
0.3
SE
12
0.2
ESE
12
0.3
SSW
6
0.3
SE
12
0.3
SE
12
0.2
ENE
3
0.3
SE
12
0.3
SE
12
0.3
SE
12
0.1
SE
6
0.2
SSE
6
0.2
ESE
12
0.2
ESE
12
0.2
ESE
11
0.2
ESE
11
0.1
SE
11
0.1
SE
11
0.1
SE
6
0.1
SE
6
0.2
ENE
4
Energy kJ
7
7
6
23
14
6
23
23
1
23
23
23
1
3
14
13
13
12
5
5
2
1
2
Wind waves
Height (m)
Direction
Period (s)
1
S
6
0.7
NNW
3
0.5
NW
3
0.5
NW
3
0.2
WNW
3
0.5
SSW
6
0.6
SW
4
0.3
ENE
2
0.3
ENE
3
0.3
SSW
4
0.5
SSW
4
0.4
WNW
3
Energy kJ
71
10
4
5
1
18
12
1
2
4
11
3
Nearest Offshore or Glassy
Rating
(10 max)
3
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
0
0
0
0
0
58
29
0
0
29
0
233
283
1517
229
55
29
544
0
0
51
566
279
338
Best forecast wave conditions in Shikoku
Rating
(10 max)
3
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
3
2
2
1
1
2
3
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
Header Global
Rating
(10 max)
5
7
9
8
8
7
6
6
6
6
5
5
5
5
5
5
5
8
9
9
9
6
6
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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