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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 pm Wednesday 10 Dec 2025 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
20.7° 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 3AM is: 0.5m 8s primary swell from a East direction and 0.4m 11s secondary swell from a Southeast direction (forecast issued at 08:00pm December 10). The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Dec) | 2ft (0.6m) | 10s |
| Afternoon (11 Dec) | 1.5ft (0.5m) | 11s |
| Evening (11 Dec) | 2ft (0.6m) | 10s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wed 10 | Thursday 11 | Friday 12 | Saturday 13 | |||||||||||||||||||||
| 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 | 6 AM | 9 AM | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 10 | 11 | 10 | 10 | 10 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 51 | 74 | 74 | 37 | 83 | 85 | 63 | 65 | 90 | 85 | 80 | 78 | 77 | 47 | 63 | 62 | 61 | 55 | 53 | 53 | 54 | 37 | 69 | 72 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | off | off | off | glass | glass | cross- on | cross- on | glass | cross- off | off | off | off | off | off | off | off | off | off | off | off | off | on | glass |
High Tide / height (m) | 9:22PM 1.51 | 11:17AM 1.53 | 10:36PM 1.38 | 12:08PM 1.50 | 12:13AM 1.30 | 12:58PM 1.49 | ||||||||||||||||||
Low Tide / height (m) | 3:57PM 1.01 | 4:15AM 0.48 | 5:10PM 0.97 | 5:12AM 0.66 | 6:31PM 0.89 | 6:16AM 0.81 | ||||||||||||||||||
Wed 10 | Thursday 11 | Friday 12 | Saturday 13 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:58 | - | - | - | - | - | - | - | 6:58 | - | - | - | - | - | - | - | 6:58 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:57 | - | - | - | - | - | - | - | 4:57 | - | - | - | - | - | - | - | 4:57 |
 |  | | | |  |  |  |  | | | |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 11 | 10 | 10 | 11 | 11 | 13 | 15 | 15 | 12 | 12 | 12 | 10 | 10 | 8 | 9 | 9 | 5 | 4 | 3 | 3 | 3 | 7 | 10 | 10 |
| Feels °C (?) | 9 | 7 | 7 | 9 | 9 | 12 | 13 | 13 | 11 | 10 | 10 | 6 | 5 | 2 | 3 | 3 | -1 | -1 | -2 | -2 | -1 | 3 | 6 | 8 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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