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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 pm Wednesday 13 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
20.4° 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: 1.1m 9s primary swell from a East-southeast direction and 0.2m 7s secondary swell from a South direction (forecast issued at 08:00pm May 13). The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 May) | 3.5ft (1.1m) | 10s |
| Afternoon (14 May) | 3.5ft (1.1m) | 10s |
| Evening (14 May) | 3.5ft (1.1m) | 10s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Thu afternoon. Warm (max 22°C on Thu morning, min 15°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Wed 13 | Thursday 14 | Friday 15 | Saturday 16 | |||||||||||||||||||||
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 | 6 AM | 9 AM | 12 PM | 3 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | ESE 7 | ESE 8 | ESE 8 | E 8 | E 8 | ESE 8 | ESE 8 | ESE 8 | |
242 | 227 | 227 | 193 | 185 | 230 | 240 | 245 | 235 | 235 | 196 | 301 | 180 | 280 | 207 | 388 | 355 | 449 | 414 | 488 | 422 | 259 | 221 | 231 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | off | off | off | off | glassy | on | on | glassy | off | off | off | off | glassy | on | cross-on | cross-on | glassy | glassy | off | off | glassy | on | on | |
High Tide | 3:30PM1.57m | 3:35AM1.72m | 4:23PM1.71m | 4:09AM1.78m | 5:13PM1.82m | 4:44AM1.84m | ||||||||||||||||||
Low Tide | 9:27PM0.65m | 10:00AM0.39m | 10:14PM0.66m | 10:40AM0.19m | 10:59PM0.70m | 11:21AM0.03m | ||||||||||||||||||
 |  | | |  | |  | | | | | | | | | | | | | | | | | | |
 | — | — | — | 5:05 | — | — | — | — | — | — | — | 5:05 | — | — | — | — | — | — | — | 5:03 | — | — | — | — |
 | 6:55 | — | — | — | — | — | — | — | 6:57 | — | — | — | — | — | — | — | 6:58 | — | — | — | — | — | — | 6:58 |
1 | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 21 | 18 | 17 | 16 | 17 | 21 | 22 | 22 | 20 | 18 | 16 | 15 | 16 | 21 | 21 | 21 | 21 | 19 | 18 | 17 | 17 | 20 | 21 | 21 |
22 | 18 | 16 | 15 | 16 | 21 | 21 | 22 | 22 | 18 | 15 | 13 | 14 | 20 | 19 | 20 | 21 | 20 | 19 | 17 | 17 | 20 | 20 | 20 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | SE 11 | SE 11 | SE 11 | S 7 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 |
 kJ | 242 | 227 | 227 | 193 | 185 | 230 | 240 | 245 | 235 | 235 | 196 | 188 | 180 | 173 | 20 | 20 | 5 | 1 | 414 | 359 | 310 | 259 | 221 | 231 |
Swell 2 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | S 7 | S 7 | S 7 | S 7 | S 7 | S 7 | S 7 | S 7 | SSE 11 | SE 11 | SE 11 | S 7 | S 7 | S 7 | SE 16 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 |
| kJ | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 13 | 20 | 20 | 4 | 4 | 1 | 10 | 5 | 5 | 19 | 19 | 19 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | S 9 | S 9 | — | — | — | — | — | S 7 | S 7 | S 7 | SE 16 | SE 16 | SE 16 | — | S 7 | S 7 | SE 15 | SE 15 | SE 15 | SE 15 |
| kJ | — | — | — | — | 2 | 2 | — | — | — | — | — | 4 | 4 | 4 | 10 | 10 | 10 | — | 1 | 1 | 9 | 9 | 9 | 9 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | NE 3 | E 10 | ENE 5 | E 9 | E 9 | E 9 | ESE 7 | ESE 8 | — | E 8 | E 8 | — | E 6 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 5 | 301 | 56 | 280 | 207 | 388 | 355 | 449 | — | 488 | 422 | — | 100 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 61 | 29 | 0 | 0 | 0 | 0 | 0 | 0 | 2320 | 82 | 29 | 0 | 0 | 0 | 0 | 0 | 103 | 103 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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