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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 am Sunday 03 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
21.0° C
(Which is 1.1°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 2PM is: 1.5m 6s primary swell from a South-southwest direction and 0.4m 9s secondary swell from a East-southeast direction, 0.1m 9s secondary swell from a East direction (forecast issued at 08:00am May 03). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (03 May) | 2.5ft (0.8m) | 5s |
| Afternoon (03 May) | 5.5ft (1.7m) | 6s |
| Evening (03 May) | 11ft (3.5m) | 8s |
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 51mm), heaviest during Sun night. Warm (max 22°C on Sun night, min 13°C on Mon night). Winds decreasing (fresh winds from the SSW on Sun night, calm by Tue morning). | ||||||||||||||||||||||||
Sunday 3 | Monday 4 | Tuesday 5 | Wed 6 | |||||||||||||||||||||
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 10 | SSW 5 | SSW 5 | SSW 6 | SSW 7 | SSW 8 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | |
37 | 34 | 62 | 187 | 512 | 1412 | 1341 | 1244 | 562 | 450 | 306 | 220 | 138 | 84 | 46 | 42 | 42 | 41 | 59 | 58 | 57 | 67 | 65 | 64 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | glassy | cross-on | on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | glassy | cross-on | on | glassy | cross-off | cross-off | cross-off | |
High Tide | 6:02AM1.75m | 7:20PM1.72m | 6:27AM1.73m | 7:55PM1.66m | 6:53AM1.69m | 8:33PM1.57m | ||||||||||||||||||
Low Tide | 12:39PM0.17m | 00:51AM0.86m | 1:11PM0.20m | 1:19AM0.93m | 1:44PM0.26m | 1:49AM1.00m | ||||||||||||||||||
 |  |  |  |  |  |  |  | | | |  | |  | | | | | | | |  | | | |
 | 5:15 | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:13 |
 | — | — | — | — | 6:49 | — | — | — | — | — | — | — | 6:49 | — | — | — | — | — | — | — | 6:50 | — | — | 6:51 |
— | — | 1 | 6 | 15 | 24 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 18 | 19 | 19 | 20 | 20 | 22 | 21 | 20 | 17 | 18 | 19 | 19 | 17 | 15 | 14 | 13 | 13 | 17 | 18 | 18 | 17 | 15 | 15 | 15 |
18 | 20 | 20 | 19 | 19 | 20 | 22 | 19 | 15 | 15 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 15 | 16 | 16 | 16 | 13 | 13 | 14 | |
Swell 1 Height (m) Direction Period (s) | SSW 4 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SW 7 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
 kJ | 12 | 34 | 34 | 50 | 38 | 38 | 37 | 987 | 562 | 450 | 306 | 220 | 138 | 84 | 46 | 23 | 42 | 41 | 59 | 58 | 57 | 67 | 65 | 64 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | E 9 | E 9 | E 9 | — | — | — | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SSW 7 | S 6 | SW 6 | SSE 6 | S 6 | S 6 | S 5 | S 5 |
| kJ | 37 | 2 | 2 | 2 | — | — | — | 38 | 33 | 32 | 38 | 38 | 38 | 39 | 42 | 42 | 18 | 20 | 10 | 6 | 6 | 5 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 6 | SSE 6 | SSE 6 | — | SSE 6 | SSW 6 | SW 7 | — | — | SW 7 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 8 | 8 | — | 7 | 4 | 2 | — | — | 2 |
Wind waves Height (m) Direction Period (s) | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 7 | SSW 8 | SSW 9 | SSW 9 | W 4 | W 4 | W 5 | WNW 5 | WNW 4 | WNW 4 | W 4 | W 3 | W 3 | — | — | — | — | — | — | — |
| kJ | 28 | 26 | 62 | 187 | 512 | 1412 | 1341 | 1244 | 38 | 48 | 71 | 66 | 39 | 13 | 7 | 2 | 1 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 279 | 1479 | 1492 | 183 | 183 | 82 | 64 | 63 | 82 | 63 | 55 | 0 | 0 | 0 | 0 | 0 | 229 | 51 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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