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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 am Saturday 16 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
21.1° 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 5PM is: 0.9m 9s primary swell from a East-southeast direction and 0.3m 11s secondary swell from a Southeast direction (forecast issued at 08:00am May 16). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 May) | 3.5ft (1.0m) | 9s |
| Afternoon (16 May) | 3ft (0.9m) | 9s |
| Evening (16 May) | 3ft (0.9m) | 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 24°C on Mon morning, min 17°C on Sat night). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 16 | Sunday 17 | Monday 18 | Tue 19 | |||||||||||||||||||||
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 | 12 AM | 3 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | |
169 | 169 | 169 | 140 | 125 | 122 | 127 | 125 | 125 | 127 | 131 | 131 | 106 | 106 | 111 | 111 | 92 | 84 | 108 | 106 | 113 | 103 | 101 | 108 | |
Wind (km/h) | ||||||||||||||||||||||||
off | on | on | on | glassy | off | off | off | off | glassy | on | on | glassy | off | off | glassy | off | glassy | on | on | glassy | cross-off | off | cross-off | |
High Tide | 4:44AM1.84m | 6:02PM1.88m | 5:20AM1.87m | 6:51PM1.90m | 5:58AM1.88m | 7:41PM1.85m | ||||||||||||||||||
Low Tide | 11:21AM0.03m | 11:42PM0.77m | 12:04PM-0.07m | 00:25AM0.84m | 12:48PM-0.10m | 1:09AM0.92m | ||||||||||||||||||
 | | | | |  | | | | | | | | | | | | | | | | | | | |
 | 5:03 | — | — | — | — | — | — | 5:03 | — | — | — | — | — | — | — | 5:03 | — | — | — | — | — | — | — | 5:01 |
 | — | — | — | — | 6:58 | — | — | — | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 7:00 | — | — | 7:00 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 18 | 21 | 22 | 22 | 21 | 19 | 18 | 17 | 17 | 23 | 23 | 23 | 22 | 19 | 19 | 18 | 18 | 23 | 24 | 24 | 22 | 20 | 19 | 18 |
19 | 22 | 22 | 22 | 22 | 20 | 18 | 17 | 17 | 24 | 22 | 23 | 24 | 20 | 19 | 18 | 18 | 23 | 24 | 24 | 23 | 21 | 20 | 18 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
 kJ | 169 | 169 | 169 | 140 | 125 | 122 | 127 | 125 | 125 | 127 | 131 | 131 | 106 | 106 | 111 | 111 | 92 | 84 | 108 | 106 | 113 | 103 | 101 | 108 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | SE 12 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 12 | SE 11 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 10 | SE 12 | SE 11 | SE 11 |
| kJ | 19 | 19 | 18 | 19 | 17 | 22 | 16 | 17 | 17 | 16 | 16 | 4 | 24 | 19 | 23 | 23 | 23 | 22 | 23 | 6 | 4 | 21 | 31 | 19 |
Swell 3 Height (m) Direction Period (s) | SE 15 | SE 15 | SE 15 | SE 15 | SE 15 | SE 15 | S 6 | SE 14 | SE 14 | ESE 14 | SE 14 | SE 14 | — | — | — | — | SE 10 | SE 10 | SE 10 | SE 10 | SE 12 | — | — | — |
| kJ | 9 | 9 | 9 | 9 | 9 | 9 | 1 | 8 | 8 | 19 | 7 | 7 | — | — | — | — | 4 | 4 | 4 | 4 | 6 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 82 | 82 | 58 | 0 | 0 | 0 | 0 | 0 | 0 | 85 | 61 | 0 | 0 | 0 | 0 | 0 | 0 | 51 | 51 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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