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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 pm 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
21.1° C
(Which is 1.0°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 5AM is: 2.1m 8s primary swell from a South-southwest direction and 0.4m 10s secondary swell from a East-southeast direction, 1.1m 5s secondary swell from a West direction (forecast issued at 08:00pm May 03). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (04 May) | 5.5ft (1.7m) | 8s |
| Afternoon (04 May) | 4.5ft (1.3m) | 8s |
| Evening (04 May) | 3ft (0.9m) | 7s |
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 30mm), 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). | ||||||||||||||||||||||||
Sun 3 | Monday 4 | Tuesday 5 | Wednesday 6 | |||||||||||||||||||||
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 |   |    |    |    | ||||||||||||||||||||
SSW 7 | SSW 8 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SW 7 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | |
497 | 1148 | 1539 | 1368 | 521 | 370 | 298 | 220 | 142 | 86 | 43 | 42 | 42 | 41 | 41 | 40 | 58 | 57 | 56 | 64 | 64 | 63 | 83 | 81 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | off | off | off | glassy | on | on | glassy | cross-off | cross-off | glassy | cross-off | glassy | cross-on | on | |
High Tide | 7:20PM1.72m | 6:27AM1.73m | 7:55PM1.66m | 6:53AM1.69m | 8:33PM1.57m | 7:21AM1.64m | ||||||||||||||||||
Low Tide | 00:51AM0.86m | 1:11PM0.20m | 1:19AM0.93m | 1:44PM0.26m | 1:49AM1.00m | 2:21PM0.34m | ||||||||||||||||||
 |  |  |  |  |  | | | | | |  | |  | | | | | | | | | | | |
 | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:13 | — | — | — | — |
 | 6:49 | — | — | — | — | — | — | — | 6:49 | — | — | — | — | — | — | — | 6:50 | — | — | — | — | — | — | 6:51 |
15 | 23 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 21 | 22 | 21 | 19 | 16 | 19 | 19 | 18 | 16 | 15 | 14 | 13 | 13 | 17 | 18 | 18 | 17 | 16 | 15 | 16 | 16 | 19 | 19 | 19 |
20 | 19 | 22 | 18 | 14 | 15 | 11 | 11 | 12 | 13 | 12 | 11 | 11 | 16 | 15 | 16 | 16 | 14 | 12 | 15 | 14 | 18 | 17 | 17 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SW 7 | SSW 7 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
 kJ | 37 | 37 | 38 | 1058 | 521 | 370 | 298 | 220 | 142 | 86 | 43 | 19 | 42 | 41 | 41 | 40 | 58 | 57 | 56 | 64 | 64 | 63 | 83 | 81 |
Swell 2 Height (m) Direction Period (s) | — | — | E 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SSW 7 | SSE 6 | SSE 6 | SSE 6 | S 6 | S 6 | — | S 5 | S 5 | S 4 | S 4 | S 4 |
| kJ | — | — | 7 | 33 | 38 | 38 | 38 | 38 | 38 | 39 | 42 | 42 | 18 | 8 | 7 | 7 | 6 | 6 | — | 2 | 1 | 1 | 1 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SSE 7 | SSE 6 | SSE 6 | SW 6 | SSW 6 | SSW 6 | SW 7 | W 7 | SW 7 | SSW 5 | W 6 | — | SW 5 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 9 | 8 | 8 | 10 | 4 | 3 | 2 | 1 | 2 | 3 | 1 | — | 1 | — |
Wind waves Height (m) Direction Period (s) | SSW 7 | SSW 8 | SSW 9 | SSW 9 | W 5 | W 5 | W 5 | WNW 5 | WNW 4 | W 4 | W 3 | W 3 | WNW 3 | — | — | — | — | — | SSE 5 | SSE 3 | SSE 3 | ESE 3 | SE 3 | — |
| kJ | 497 | 1148 | 1539 | 1368 | 50 | 50 | 102 | 78 | 28 | 8 | 4 | 3 | 2 | — | — | — | — | — | 6 | 4 | 2 | 1 | 2 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1479 | 183 | 183 | 82 | 55 | 64 | 103 | 63 | 0 | 0 | 0 | 0 | 0 | 0 | 330 | 297 | 0 | 0 | 0 | 0 | 0 | 0 | 29 | 29 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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