Niyodo Rivermouth surfForecast / Shikoku / Japan

information circle48hr Weather and Surf, issued 2 pm Friday 22 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 1.2°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 8PM is: 0.6m 9s primary swell from a East-southeast direction and 0.7m 6s secondary swell from a South direction (forecast issued at 02:00pm May 22). An open ocean swell of 0.4m 6s is not directed at the surf break. The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (22 May)--
Afternoon (22 May)2.5ft (0.7m)10s
Evening (22 May)2ft (0.6m)9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 15mm), heaviest on Fri night. Warm (max 24°C on Fri afternoon, min 20°C on Fri night). Wind will be generally light.

Fri
22
Saturday
23
Sunday
24
Mon
25
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
6 AM
9 AM
Rating
(10 max)
1
0
0
1
0
1
0
0
0
1
3
2
2
3
3
2
1
2
4
2
4
2
2
2
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
SSW
7
0.7
SE
10
0.8
SE
9
0.6
ESE
9
0.5
S
6
1.1
E
10
1.8
ESE
6
2.2
ESE
7
2.5
ESE
8
2.5
ESE
9
2.5
E
9
2.4
ESE
9
2.5
ESE
8
2.4
ESE
8
2.3
ESE
8
2.2
ESE
8
2.2
ESE
8
2.1
ESE
8
2.3
E
8
1.9
ESE
8
2.1
E
9
1.8
ESE
9
1.7
ESE
9
1.6
ESE
9
Wave Graph
Metric surfscale
Energy kJ
99
92
106
69
18
225
263
542
886
1076
1088
858
865
800
702
629
644
589
737
471
653
455
436
391
Wind (km/h)
5
NE
15
SSE
5
SSW
5
W
5
ENE
5
ESE
15
ESE
25
SE
25
ESE
20
ESE
15
ESE
15
ESE
15
ESE
10
ENE
5
ENE
5
SE
10
SSE
5
S
0
SW
5
NNW
5
NNW
5
NNE
5
N
5
S
glassy
cross-on
on
glassy
cross-off
cross
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross-off
cross-off
cross-on
on
on
glassy
glassy
glassy
glassy
glassy
glassy
High Tide
11:39PM1.53m
10:29AM1.44m
00:43AM1.51m
12:10PM1.37m
1:37AM1.53m
Low Tide
4:23PM0.37m
5:12AM1.07m
5:32PM0.52m
6:43AM0.98m
6:45PM0.65m
7:57AM0.84m
clear
clear
part cloud
part cloud
part cloud
cloud
light rain
rain showers
rain showers
light rain
rain showers
light rain
light rain
light rain
clear
part cloud
part cloud
cloud
cloud
cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:00
4:58
4:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:02
7:04
7:05
2
2
2
2
2
2
2
1
Temp °C
25
24
23
22
21
20
20
21
21
22
21
21
21
21
21
22
22
22
22
21
20
20
20
22
26
24
25
25
23
21
20
19
20
22
22
22
22
23
23
23
22
23
24
23
22
22
22
24
Swell 1
Height (m)
Direction
Period (s)
1
SSW
7
0.8
SSW
7
0.8
SE
9
0.7
S
6
0.5
S
6
0.4
SSE
6
0.6
ESE
9
2.5
E
9
2.2
ESE
8
0.2
SSW
8
2
ESE
8
1.9
ESE
8
1.9
ESE
8
1.8
ESE
9
1.7
ESE
9
1.6
ESE
9
Energy kJ
99
50
106
37
18
12
66
1088
644
6
521
471
483
455
436
391
Swell 2
Height (m)
Direction
Period (s)
0.7
ESE
10
0.7
SE
10
0.6
SSW
6
0.6
ESE
9
0.3
SW
6
0.2
SSW
6
0.1
S
7
0.3
SSW
8
0.3
SSW
7
0.3
SSW
7
0.3
SSW
6
0.2
SSW
6
0.2
SSW
6
Energy kJ
81
92
31
69
6
3
1
12
10
9
8
4
4
Swell 3
Height (m)
Direction
Period (s)
0.2
ENE
4
0.2
ENE
4
0.2
ENE
5
0.5
SW
6
0.4
SW
6
0.2
SSE
8
0.1
E
16
0.2
SSW
6
Energy kJ
2
1
3
19
10
6
5
4
Wind waves
Height (m)
Direction
Period (s)
0.5
SE
3
0.4
SE
3
0.4
ENE
6
1.2
E
4
1.1
E
10
1.8
ESE
6
2.2
ESE
7
2.5
ESE
8
2.5
ESE
9
2.4
ESE
9
2.5
ESE
8
2.4
ESE
8
2.3
ESE
8
2.2
ESE
8
2.1
ESE
8
2.3
E
8
2.1
E
9
Energy kJ
4
2
11
58
225
263
542
886
1076
858
865
800
702
629
589
737
653
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
2
1
1
1
1
1
1
1
3
3
3
3
2
4
2
4
2
2
2
Distance (km)
0
51
29
0
29
29
229
229
243
587
330
330
224
0
0
29
330
55
0
0
0
0
0
0
Best forecast wave conditions in Shikoku
Rating
(10 max)
1
1
1
1
1
2
3
3
4
2
4
2
4
2
2
2
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
2
1
1
2
1
1
1
1
1
1
2
3
3
4
3
2
4
2
4
2
2
2
Header Global
Rating
(10 max)
5
7
7
7
6
7
6
5
5
6
7
8
7
6
5
5
5
5
5
5
5
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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