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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 pm Monday 04 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
21.3° 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 9PM is: 0.9m 8s primary swell from a South-southwest direction and 0.4m 10s secondary swell from a East-southeast direction (forecast issued at 02:00pm May 04). 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 (04 May) | - | - |
| Afternoon (04 May) | 4.5ft (1.4m) | 8s |
| Evening (04 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 21°C on Thu morning, min 11°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Mon 4 | Tuesday 5 | Wednesday 6 | Thu 7 | |||||||||||||||||||||
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 | 6 AM | 9 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SSW 8 | SSW 8 | SW 8 | SSW 8 | SW 7 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | |
322 | 245 | 173 | 88 | 54 | 42 | 42 | 42 | 41 | 58 | 57 | 67 | 65 | 85 | 81 | 100 | 100 | 80 | 80 | 80 | 78 | 76 | 76 | 73 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-off | cross-off | off | cross-off | off | off | glassy | on | on | glassy | cross-off | off | off | cross-off | glassy | on | cross-on | glassy | off | off | off | off | glassy | |
High Tide | 7:55PM1.66m | 6:53AM1.69m | 8:33PM1.57m | 7:21AM1.64m | 9:17PM1.49m | 7:53AM1.57m | ||||||||||||||||||
Low Tide | 1:19AM0.93m | 1:44PM0.26m | 1:49AM1.00m | 2:21PM0.34m | 2:22AM1.06m | |||||||||||||||||||
 |  | |  | | | |  | | | |  |  | | | | | | | | | | | | |
 | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:11 | — | — |
 | — | — | 6:49 | — | — | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:51 | — | — | — | — | 6:52 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 20 | 18 | 16 | 15 | 13 | 12 | 11 | 17 | 18 | 18 | 17 | 15 | 14 | 15 | 15 | 18 | 19 | 19 | 18 | 17 | 17 | 16 | 16 | 20 |
13 | 12 | 12 | 12 | 11 | 9 | 8 | 15 | 15 | 15 | 16 | 13 | 11 | 13 | 13 | 17 | 17 | 18 | 19 | 17 | 17 | 15 | 15 | 20 | |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SW 8 | SSW 8 | SW 7 | SW 7 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 6 | ESE 6 | ESE 6 |
 kJ | 322 | 245 | 173 | 88 | 54 | 24 | 42 | 42 | 41 | 58 | 57 | 67 | 65 | 85 | 81 | 100 | 100 | 80 | 80 | 80 | 78 | 41 | 44 | 48 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SW 7 | SSE 6 | SSE 6 | S 6 | S 6 | S 6 | S 5 | S 5 | ESE 4 | SW 5 | E 7 | E 6 | ESE 4 | E 6 | E 6 | ESE 9 | ESE 9 | ESE 9 |
| kJ | 38 | 38 | 38 | 38 | 41 | 42 | 12 | 8 | 7 | 6 | 6 | 2 | 2 | 1 | 3 | 1 | 17 | 7 | 4 | 15 | 24 | 76 | 76 | 73 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 7 | — | SE 7 | SSE 7 | SSE 6 | SW 7 | SSW 6 | SSW 6 | W 7 | — | — | — | S 5 | — | — | — | E 6 | — | — | — | SE 8 | SE 8 |
| kJ | — | — | 13 | — | 9 | 5 | 8 | 7 | 4 | 4 | 1 | — | — | — | 1 | — | — | — | 3 | — | — | — | 2 | 2 |
Wind waves Height (m) Direction Period (s) | W 5 | WNW 5 | WNW 4 | NW 4 | NW 3 | — | — | — | — | — | E 4 | — | E 3 | ESE 3 | — | E 4 | E 4 | ESE 3 | E 6 | — | — | — | — | — |
| kJ | 60 | 78 | 29 | 12 | 2 | — | — | — | — | — | 1 | — | 1 | 2 | — | 2 | 4 | 4 | 18 | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 82 | 183 | 0 | 0 | 0 | 0 | 0 | 0 | 330 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 29 | 29 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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