Niyodo Rivermouth Surf Break

Lat Long: 33.54° N 133.69° E

Niyodo Rivermouth 48 hour detailed Surf Forecast

Issued: 2 am 18 Sep 2026 (local time)

Forecast update in  hr  min

Today's Niyodo Rivermouth sea temperature is
28.4°C
1.8° 

Niyodo Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Niyodo Rivermouth today (18 Sep):

  • Morning surf: Morning surf (18 Sep, local time) - 8ft (2.5m), 9s period with ESE swell.
  • Afternoon surf: Afternoon surf (18 Sep, local time) - 8ft (2.5m), 9s period with E swell.
  • Evening surf: Evening surf (18 Sep, local time) - 8ft (2.4m), 10s period with ESE swell.

The current surf forecast for Niyodo Rivermouth at 8AM is: 2.5m 9s primary swell from a East-southeast direction and 0.1m 11s secondary swell from a South direction (forecast issued at 02:00am September 18). The wind direction is predicted to be glassy and the swell rating is 3.

Time (JST) & DateWave HeightWave Period
Morning (18 Sep)8ft (2.5m)9s
Afternoon (18 Sep)8ft (2.5m)9s
Evening (18 Sep)8ft (2.4m)10s

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


Short Range Forecast

Light rain (total 2mm), mostly falling on Sat afternoon. Warm (max 30°C on Sun morning, min 22°C on Fri night). Wind will be generally light.

Friday
18
Saturday
19
Sunday
20
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)
2
3
3
3
4
3
3
2
3
3
4
5
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Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
ESE
8
2.1
E
8
2.3
E
9
2.5
ESE
9
2.5
E
9
2.5
E
9
2.5
ESE
10
2.4
ESE
10
2.3
ESE
10
2.1
E
10
2.5
E
10
2.5
E
10
3
ESE
13
3.5
ESE
15
3.5
ESE
14
3.5
ESE
13
3.5
ESE
13
3
ESE
13
3
ESE
12
3
ESE
12
3.5
ESE
13
3.5
ESE
13
3.5
ESE
13
3.5
ESE
13
Wave Graph
Metric surfscale
Energy kJ
406
588
790
976
1079
1126
1086
980
901
809
1281
1301
2532
5364
5008
4176
3688
3062
2621
2860
3656
3831
4373
4526
Wind (km/h)
5
ENE
5
NE
5
NNE
0
WNW
5
S
10
SSE
10
SE
5
E
5
NE
5
NNE
5
N
5
WNW
10
S
5
SSW
5
WNW
10
N
10
N
10
N
10
NNW
10
N
20
NNW
25
NNW
20
NNW
20
NNW
Wind State
cross-off
glassy
glassy
glassy
glassy
cross-on
cross-on
cross
glassy
glassy
off
glassy
on
cross-on
cross-off
off
off
off
off
off
off
off
off
cross-off
High Tide
10:36AM1.27m
8:52PM1.49m
9:22PM1.39m
4:06PM1.33m
Low Tide
3:41AM0.56m
2:51PM1.11m
4:47AM0.66m
6:47AM0.71m
8:43PM1.27m
part cloud
part cloud
part cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
clear
rain showers
rain showers
clear
clear
clear
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:48
5:50
5:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:07
6:06
 mm
1
1
Temp °C
24
24
23
25
25
26
25
24
23
23
22
26
28
27
26
24
23
23
23
27
30
29
26
24
Feels °C
27
27
26
29
28
28
28
27
26
26
24
29
30
30
29
27
25
25
25
29
30
28
26
24
  • 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
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Niyodo Rivermouth surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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