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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 am Monday 20 Apr 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
19.4° 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 2PM is: 2.1m 13s primary swell from a East-southeast direction and 1.0m 6s secondary swell from a East-southeast direction (forecast issued at 08:00am April 20). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Apr) | 7ft (2.2m) | 13s |
| Afternoon (20 Apr) | 7ft (2.1m) | 13s |
| Evening (20 Apr) | 6ft (1.9m) | 13s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 20 | Tuesday 21 | Wednesday 22 | Thu 23 | |||||||||||||||||||||
| 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1944 | 1672 | 1575 | 1427 | 1342 | 1099 | 905 | 876 | 737 | 644 | 593 | 531 | 422 | 356 | 350 | 275 | 260 | 212 | 170 | 170 | 170 | 133 | 133 | 130 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- on | cross- on | cross- on | cross- on | glass | cross- off | off | off | off | off | off | off | off | off | off | off | glass | on | on | glass | off | cross- off | glass |
High Tide / height (m) | 6:58AM 1.87 | 8:29PM 1.77 | 7:32AM 1.81 | 9:26PM 1.63 | 8:10AM 1.71 | 10:40PM 1.50 | ||||||||||||||||||
Low Tide / height (m) | 1:43PM 0.01 | 1:55AM 0.90 | 2:29PM 0.10 | 2:38AM 1.04 | 3:24PM 0.24 | |||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thu 23 | |||||||||||||||||||||
| Sunrise | 5:30 | - | - | - | - | - | - | - | 5:28 | - | - | - | - | - | - | - | 5:26 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:38 | - | - | - | - | - | - | - | 6:38 | - | - | - | - | - | - | - | 6:39 | - | - | - |
 |  | | |  |  | | | | | | | |  | | | | |  | | |  | |  | |
Rain (mm) | - | 1 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 |
| Temp. °C | 18 | 20 | 20 | 19 | 19 | 17 | 17 | 17 | 17 | 17 | 20 | 21 | 19 | 14 | 13 | 13 | 12 | 17 | 18 | 18 | 17 | 15 | 14 | 13 |
| Feels °C (?) | 18 | 19 | 18 | 19 | 20 | 17 | 17 | 17 | 17 | 12 | 15 | 16 | 16 | 11 | 9 | 9 | 9 | 15 | 16 | 16 | 17 | 13 | 12 | 12 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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