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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 am Wednesday 22 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
19.6° 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 4PM is: 0.9m 10s primary swell from a East-southeast direction and 0.4m 14s secondary swell from a Southeast direction (forecast issued at 08:00am April 22). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Apr) | 3.5ft (1.0m) | 10s |
| Afternoon (22 Apr) | 3ft (0.9m) | 10s |
| Evening (22 Apr) | 2.5ft (0.8m) | 10s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 22 | Thursday 23 | Friday 24 | Sat 25 | |||||||||||||||||||||
| 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) (?) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 13 | 6 | 6 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 12 | 10 | 10 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 216 | 212 | 170 | 170 | 170 | 130 | 130 | 161 | 228 | 84 | 312 | 401 | 302 | 226 | 187 | 155 | 121 | 96 | 77 | 130 | 43 | 68 | 121 | 173 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | on | glass | off | off | off | cross- off | cross- off | cross- off | cross- off | off | off | off | off | off | off | off | glass | cross- on | cross | off | off | off |
High Tide / height (m) | 8:10AM 1.71 | 10:40PM 1.50 | 8:57AM 1.58 | 12:20AM 1.44 | 10:13AM 1.44 | 1:56AM 1.46 | ||||||||||||||||||
Low Tide / height (m) | 3:24PM 0.24 | 3:33AM 1.15 | 4:34PM 0.39 | 5:12AM 1.22 | 6:06PM 0.51 | |||||||||||||||||||
Wednesday 22 | Thursday 23 | Friday 24 | Sat 25 | |||||||||||||||||||||
| Sunrise | 5:26 | - | - | - | - | - | - | - | 5:26 | - | - | - | - | - | - | - | 5:24 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:39 | - | - | - | - | - | - | - | 6:40 | - | - | - | - | - | - | - | 6:42 | - | - | - |
 | |  | | |  |  | |  | | |  | |  | | | |  | | | |  | | | |
Rain (mm) | - | - | - | - | - | - | 1 | 4 | 9 | 10 | 7 | 2 | 3 | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 14 | 18 | 19 | 19 | 18 | 16 | 15 | 12 | 12 | 13 | 15 | 14 | 13 | 13 | 13 | 13 | 12 | 16 | 20 | 18 | 17 | 13 | 12 | 12 |
| Feels °C (?) | 12 | 17 | 18 | 19 | 17 | 15 | 14 | 10 | 11 | 12 | 14 | 11 | 11 | 11 | 11 | 11 | 10 | 14 | 18 | 15 | 16 | 9 | 8 | 8 |
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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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