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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Friday 15 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
20.3° 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 7AM is: 1.0m 9s primary swell from a East direction and 0.3m 11s secondary swell from a Southeast direction (forecast issued at 02:00am May 15). An open ocean swell of 0.9m 5s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 May) | 3.5ft (1.0m) | 9s |
| Afternoon (15 May) | 2.5ft (0.7m) | 9s |
| Evening (15 May) | 4.5ft (1.4m) | 8s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 23°C on Sun afternoon, min 17°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 15 | Saturday 16 | Sunday 17 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
E 10 | E 10 | E 9 | E 9 | ESE 9 | ESE 9 | ESE 6 | ESE 8 | ESE 8 | ESE 9 | ESE 7 | ESE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | |
192 | 188 | 180 | 173 | 113 | 90 | 88 | 262 | 252 | 258 | 136 | 123 | 189 | 171 | 146 | 138 | 138 | 135 | 107 | 125 | 131 | 127 | 127 | 127 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | glassy | on | cross-on | glassy | glassy | off | cross-off | cross-off | glassy | on | on | glassy | off | off | off | off | glassy | on | on | glassy | glassy | |
High Tide | 4:09AM1.78m | 5:13PM1.82m | 4:44AM1.84m | 6:02PM1.88m | 5:20AM1.87m | 6:51PM1.90m | ||||||||||||||||||
Low Tide | 10:14PM0.66m | 10:40AM0.19m | 10:59PM0.70m | 11:21AM0.03m | 11:42PM0.77m | 12:04PM-0.07m | ||||||||||||||||||
 | |  | | | | | | | | | | | | | | | | | | | | | | |
 | — | 5:05 | — | — | — | — | — | — | — | 5:03 | — | — | — | — | — | — | — | 5:03 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:58 | — | — | — | — | — | — | — | 6:58 | — | — | — | — | — | — | — | 6:59 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 18 | 17 | 16 | 21 | 22 | 21 | 21 | 19 | 18 | 18 | 17 | 20 | 21 | 21 | 20 | 18 | 18 | 17 | 17 | 22 | 22 | 23 | 22 | 19 |
17 | 16 | 14 | 21 | 21 | 20 | 22 | 20 | 19 | 19 | 17 | 21 | 20 | 20 | 20 | 18 | 18 | 17 | 16 | 22 | 21 | 23 | 24 | 20 | |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | E 9 | E 9 | ESE 9 | ESE 9 | E 8 | SE 11 | ESE 8 | ESE 9 | ESE 7 | ESE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 8 |
 kJ | 192 | 188 | 180 | 173 | 113 | 90 | 46 | 5 | 252 | 258 | 136 | 123 | 189 | 171 | 146 | 138 | 138 | 135 | 107 | 125 | 131 | 127 | 127 | 127 |
Swell 2 Height (m) Direction Period (s) | S 7 | SSE 11 | SE 11 | SE 11 | SE 11 | SE 11 | ESE 9 | S 7 | SE 11 | SE 11 | ESE 9 | ESE 10 | SE 11 | SE 11 | SE 11 | SE 11 | SE 12 | SE 11 | SE 10 | ESE 14 | SE 14 | SE 10 | SE 10 | SE 11 |
| kJ | 4 | 13 | 20 | 20 | 19 | 20 | 50 | 1 | 19 | 19 | 42 | 35 | 18 | 18 | 19 | 20 | 22 | 18 | 17 | 19 | 7 | 17 | 28 | 4 |
Swell 3 Height (m) Direction Period (s) | — | S 7 | S 7 | S 7 | S 7 | S 7 | SE 11 | SE 16 | S 6 | S 6 | SE 11 | SE 11 | SE 15 | SE 15 | SE 15 | SE 15 | SE 15 | SE 14 | SE 14 | SE 10 | SE 10 | SE 14 | — | — |
| kJ | — | 4 | 4 | 4 | 4 | 4 | 5 | 10 | 1 | 1 | 19 | 19 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 4 | 4 | 7 | — | — |
Wind waves Height (m) Direction Period (s) | NE 2 | ENE 4 | ENE 5 | — | E 6 | ESE 6 | ESE 6 | ESE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 13 | 29 | — | 31 | 54 | 88 | 262 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 103 | 82 | 0 | 0 | 0 | 0 | 0 | 0 | 82 | 58 | 0 | 0 | 0 | 0 | 0 | 0 | 85 | 51 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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