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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 pm Wednesday 27 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
23.0° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Niyodo Rivermouth today (28 May):
- Morning surf: Morning surf (28 May, local time) - 4ft (1.2m), 7s period with ESE swell.
- Afternoon surf: Afternoon surf (28 May, local time) - 3ft (0.9m), 7s period with S swell.
- Evening surf: Evening surf (28 May, local time) - 3ft (0.9m), 7s period with S swell.
The current surf forecast for Niyodo Rivermouth at 4AM is: 1.7m 7s primary swell from a East-southeast direction and 1.0m 7s secondary swell from a South-southwest direction (forecast issued at 08:00pm May 27). The wind direction is predicted to be offshore and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (28 May) | 4ft (1.2m) | 7s |
| Afternoon (28 May) | 3ft (0.9m) | 7s |
| Evening (28 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 ForecastLight rain (total 4mm), mostly falling on Wed night. Warm (max 28°C on Fri morning, min 17°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Wed 27 | Thursday 28 | Friday 29 | Saturday 30 | |||||||||||||||||||||
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 6 | ESE 7 | ESE 7 | ESE 7 | E 7 | ESE 7 | SSW 7 | S 7 | S 7 | S 7 | S 6 | S 6 | SSW 6 | SW 7 | ESE 10 | ESE 10 | ESE 8 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | |
349 | 527 | 498 | 394 | 218 | 135 | 70 | 74 | 72 | 70 | 68 | 52 | 68 | 44 | 39 | 32 | 24 | 48 | 47 | 47 | 64 | 66 | 80 | 75 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | off | off | off | glassy | cross-on | glassy | cross-on | glassy | glassy | glassy | glassy | cross-off | cross-off | cross-off | glassy | glassy | off | off | off | off | glassy | on | on | |
High Tide | 4:01PM1.52m | 3:30AM1.62m | 4:47PM1.59m | 4:01AM1.64m | 5:27PM1.65m | 4:31AM1.67m | ||||||||||||||||||
Low Tide | 9:39PM0.85m | 10:10AM0.40m | 10:21PM0.89m | 10:44AM0.30m | 10:58PM0.91m | 11:17AM0.23m | ||||||||||||||||||
 |  | |  |  |  | | |  |  | |  | | | | | | | | | | | | | |
 | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — |
 | 7:06 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | 7:07 |
3 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 21 | 21 | 21 | 22 | 22 | 24 | 23 | 24 | 24 | 23 | 22 | 22 | 22 | 26 | 28 | 28 | 26 | 22 | 20 | 18 | 17 | 23 | 24 | 24 |
23 | 23 | 23 | 24 | 25 | 27 | 27 | 27 | 29 | 27 | 25 | 25 | 24 | 26 | 27 | 29 | 28 | 23 | 20 | 17 | 15 | 22 | 22 | 23 | |
Swell 1 Height (m) Direction Period (s) | S 7 | ESE 14 | SSW 7 | ESE 7 | E 7 | ESE 7 | SSW 7 | S 7 | S 7 | S 7 | S 6 | S 6 | SSW 6 | SW 7 | SW 6 | SSW 6 | SSE 6 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 |
 kJ | 23 | 19 | 74 | 394 | 218 | 135 | 70 | 74 | 72 | 70 | 68 | 52 | 68 | 44 | 34 | 17 | 11 | 48 | 47 | 47 | 64 | 66 | 80 | 75 |
Swell 2 Height (m) Direction Period (s) | ESE 14 | ESE 14 | ESE 14 | SSW 7 | SSW 7 | SSW 7 | ESE 6 | E 6 | E 6 | E 8 | E 8 | E 8 | E 8 | SSE 6 | SSE 6 | ESE 10 | ESE 8 | SSE 6 | SE 6 | ENE 6 | ESE 12 | ESE 12 | SSE 7 | SSE 7 |
| kJ | 20 | 19 | 19 | 108 | 89 | 86 | 70 | 26 | 18 | 48 | 33 | 33 | 34 | 14 | 13 | 32 | 24 | 6 | 8 | 10 | 29 | 29 | 9 | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | ESE 14 | ESE 14 | SE 10 | ESE 10 | E 9 | E 8 | E 8 | SE 9 | SE 9 | SE 10 | SE 10 | E 8 | ESE 10 | SSE 6 | SW 7 | SW 6 | SW 6 | ESE 12 | SSE 6 | SSE 7 | E 4 | SW 6 |
| kJ | — | — | 19 | 19 | 25 | 10 | 25 | 33 | 32 | 23 | 22 | 23 | 23 | 21 | 39 | 13 | 16 | 10 | 10 | 29 | 6 | 5 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | ESE 6 | ESE 7 | ESE 7 | — | NNE 4 | — | — | — | — | — | — | — | — | NW 3 | NNW 3 | WSW 3 | — | — | ENE 5 | NE 6 | — | — | ENE 4 | E 3 |
| kJ | 349 | 527 | 498 | — | 14 | — | — | — | — | — | — | — | — | 3 | 1 | 1 | — | — | 8 | 72 | — | — | 3 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 51 | 0 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 330 | 58 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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