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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Saturday 02 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
21.4° C
(Which is 1.5°C warmer than normal for this time of year)How big are the waves at Niyodo Rivermouth today?
The current surf forecast for Niyodo Rivermouth at 6AM is: 0.9m 7s primary swell from a Southwest direction and 0.4m 10s secondary swell from a East-southeast direction (forecast issued at 02:00am May 02). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (02 May) | 1.5ft (0.4m) | 10s |
| Afternoon (02 May) | 1.5ft (0.4m) | 10s |
| Evening (02 May) | 3.5ft (1.1m) | 5s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 46mm), heaviest during Sun night. Warm (max 22°C on Sun night, min 12°C on Mon night). Winds increasing (calm on Sat afternoon, strong winds from the SSW by Sun night). | ||||||||||||||||||||||||
Saturday 2 | Sunday 3 | Monday 4 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
WSW 5 | SW 7 | SW 7 | SE 10 | ESE 10 | ESE 10 | SW 5 | SW 5 | ESE 10 | ESE 10 | ESE 10 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 8 | SSW 8 | SSW 9 | SW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | |
133 | 100 | 67 | 32 | 39 | 40 | 92 | 58 | 38 | 38 | 37 | 34 | 49 | 126 | 329 | 998 | 1778 | 1324 | 1292 | 510 | 380 | 264 | 174 | 91 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | off | off | glassy | on | glassy | cross-off | glassy | glassy | cross-off | glassy | glassy | glassy | on | on | on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | off | |
High Tide | 5:37AM1.76m | 6:45PM1.76m | 6:02AM1.75m | 7:20PM1.72m | 6:27AM1.73m | 7:55PM1.66m | ||||||||||||||||||
Low Tide | 11:55PM0.74m | 12:09PM0.18m | 00:23AM0.80m | 12:39PM0.17m | 00:51AM0.86m | 1:11PM0.20m | ||||||||||||||||||
 | |  |  | |  | |  |  | | | |  | | |  | |  | | | | | | | |
 | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:47 | — | — | — | — | — | — | — | 6:49 | — | — | — | — | — | — | — | 6:49 | — |
— | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 5 | 23 | 15 | 1 | — | — | — | — | — | — | |
Temp °C | 15 | 13 | 13 | 19 | 21 | 21 | 21 | 19 | 17 | 17 | 18 | 19 | 19 | 20 | 21 | 22 | 22 | 21 | 19 | 19 | 20 | 18 | 17 | 14 |
13 | 10 | 10 | 17 | 19 | 21 | 21 | 19 | 17 | 17 | 18 | 20 | 20 | 20 | 20 | 19 | 22 | 22 | 18 | 16 | 14 | 12 | 12 | 11 | |
Swell 1 Height (m) Direction Period (s) | SE 10 | SW 7 | SW 7 | SW 6 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SW 5 | SSW 4 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
 kJ | 24 | 100 | 67 | 32 | 39 | 40 | 40 | 39 | 23 | 12 | 37 | 34 | 34 | 50 | 54 | 55 | 38 | 37 | 898 | 510 | 380 | 264 | 174 | 91 |
Swell 2 Height (m) Direction Period (s) | E 9 | SE 10 | ESE 10 | SE 10 | E 8 | — | — | — | ESE 10 | ESE 10 | — | — | E 9 | E 9 | E 10 | — | — | — | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
| kJ | 6 | 24 | 38 | 25 | 5 | — | — | — | 38 | 38 | — | — | 2 | 2 | 8 | — | — | — | 38 | 38 | 33 | 38 | 38 | 38 |
Swell 3 Height (m) Direction Period (s) | — | E 9 | E 9 | E 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 7 |
| kJ | — | 6 | 7 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 12 |
Wind waves Height (m) Direction Period (s) | WSW 5 | WNW 4 | NW 4 | — | SW 6 | SW 4 | SW 5 | SW 5 | SW 5 | — | SSW 4 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 8 | SSW 8 | SSW 9 | SW 9 | W 5 | W 5 | WNW 5 | WNW 5 | WNW 4 |
| kJ | 133 | 16 | 14 | — | 17 | 29 | 92 | 58 | 34 | — | 13 | 26 | 49 | 126 | 329 | 998 | 1778 | 1324 | 1292 | 50 | 68 | 75 | 59 | 26 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 453 | 453 | 224 | 183 | 82 | 65 | 65 | 65 | 82 | 55 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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