Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Thursday 18 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
19.3° C
(Which is slightly cooler than normal)How big are the waves at Niyodo Rivermouth today?
The current surf forecast for Niyodo Rivermouth at 6AM is: 0.4m 10s primary swell from a Southeast direction and 0.2m 5s secondary swell from a South-southwest direction (forecast issued at 02:00am December 18). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Dec) | 1ft (0.3m) | 10s |
| Afternoon (18 Dec) | 1ft (0.3m) | 10s |
| Evening (18 Dec) | 1ft (0.3m) | 10s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 18 | Friday 19 | Saturday 20 | ||||||||||||||||||||||
| 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 | 6 PM | 9 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 5 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 6 | 6 | 8 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 13 | 27 | 26 | 19 | 19 | 18 | 18 | 18 | 19 | 19 | 18 | 19 | 19 | 38 | 23 | 57 | 39 | 39 | 115 | 244 | 256 | 243 | 196 | 165 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | glass | on | glass | off | off | off | off | glass | glass | glass | glass | off | off | glass | off | glass | glass | glass | glass | off |
High Tide / height (m) | 5:33AM 1.62 | 4:20PM 1.63 | 6:08AM 1.67 | 4:55PM 1.67 | 6:42AM 1.69 | 5:31PM 1.71 | ||||||||||||||||||
Low Tide / height (m) | 10:39PM 0.30 | 10:56AM 1.00 | 11:14PM 0.22 | 11:32AM 0.99 | 11:49PM 0.16 | 12:05PM 0.98 | ||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | ||||||||||||||||||||||
| Sunrise | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:03 | - | - | - | - |
| Sunset | - | - | - | - | - | 4:59 | - | - | - | - | - | - | - | 4:59 | - | - | - | - | - | - | - | 5:00 | - | - |
 | | |  | | | | | | | | | |  | |  | | | | |  | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 10 | 9 | 8 | 10 | 13 | 13 | 11 | 9 | 9 | 8 | 8 | 10 | 14 | 15 | 14 | 14 | 14 | 14 | 13 | 15 | 17 | 17 | 15 | 14 |
| Feels °C (?) | 6 | 5 | 4 | 7 | 11 | 11 | 9 | 6 | 6 | 6 | 6 | 9 | 12 | 14 | 13 | 12 | 12 | 13 | 11 | 14 | 16 | 16 | 15 | 13 |
- 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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