- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Monday 18 May 2026 JSTForecast 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
21.0° 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 6AM is: 0.8m 9s primary swell from a East-southeast direction and 0.3m 12s secondary swell from a Southeast direction (forecast issued at 02:00am May 18). The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 2.5ft (0.7m) | 9s |
| Afternoon (18 May) | 3ft (0.9m) | 9s |
| Evening (18 May) | 3ft (0.9m) | 9s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 21mm), heaviest during Wed morning. Warm (max 24°C on Mon morning, min 18°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 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 | |
Swell Height Map |    |    |    | |||||||||||||||||||||
ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SSE 7 | S 7 | ESE 10 | |
111 | 111 | 92 | 84 | 106 | 113 | 113 | 111 | 106 | 77 | 103 | 86 | 154 | 171 | 175 | 170 | 170 | 166 | 163 | 163 | 160 | 157 | 193 | 186 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | glassy | on | on | cross-on | cross-off | cross-off | off | cross-off | glassy | on | on | glassy | glassy | glassy | off | glassy | glassy | glassy | glassy | cross-off | glassy | |
High Tide | 5:58AM1.88m | 7:41PM1.85m | 6:39AM1.85m | 8:34PM1.77m | 7:22AM1.79m | |||||||||||||||||||
Low Tide | 00:25AM0.84m | 12:48PM-0.10m | 1:09AM0.92m | 1:36PM-0.06m | 1:54AM1.00m | 2:26PM0.05m | ||||||||||||||||||
 | |  | | | | | | | | | | |  |  |  |  | |  | |  | | |  | |
 | — | 5:03 | — | — | — | — | — | — | — | 5:01 | — | — | — | — | — | — | — | 5:01 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | 7 | 4 | 1 | 1 | |
Temp °C | 19 | 19 | 19 | 24 | 24 | 24 | 23 | 20 | 19 | 18 | 18 | 22 | 23 | 23 | 20 | 20 | 20 | 19 | 19 | 21 | 21 | 22 | 22 | 22 |
19 | 19 | 19 | 25 | 24 | 24 | 24 | 20 | 19 | 18 | 19 | 22 | 22 | 23 | 22 | 22 | 22 | 20 | 21 | 24 | 25 | 26 | 25 | 25 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | S 7 | S 7 |
 kJ | 111 | 111 | 92 | 84 | 106 | 113 | 113 | 111 | 106 | 77 | 103 | 86 | 154 | 171 | 175 | 170 | 170 | 166 | 163 | 163 | 160 | 157 | 193 | 173 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 10 | SE 10 | SE 12 | SE 11 | SE 4 | SE 11 | SE 10 | E 8 | E 9 | — | SSE 7 | SSE 6 | SSE 6 | SSE 6 | — | — | — | ESE 10 | ESE 10 |
| kJ | 23 | 23 | 23 | 23 | 23 | 4 | 4 | 21 | 31 | 4 | 30 | 37 | 33 | 25 | — | 31 | 36 | 42 | 57 | — | — | — | 186 | 186 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 10 | SE 10 | SE 10 | SE 12 | SE 12 | — | SE 11 | SE 11 | ESE 10 | — | — | — | — | — | — | S 9 | — | — | — | — | — | — |
| kJ | — | — | 4 | 4 | 4 | 6 | 6 | — | 32 | 30 | 20 | — | — | — | — | — | — | 6 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | ESE 2 | SE 4 | SE 4 | — | — | — | — | — | SSE 5 | SE 6 | — | SSE 6 | — | SSE 6 | SSE 7 | SSE 7 | — | — |
| kJ | — | — | — | — | — | — | 1 | 3 | 5 | — | — | — | — | — | 17 | 34 | — | 66 | — | 88 | 114 | 152 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 330 | 58 | 58 | 0 | 0 | 0 | 0 | 0 | 58 | 58 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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.
Nearest