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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Saturday 30 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
21.5° C
(Which is normal for this time of year)How big are the waves at Niyodo Rivermouth today (30 May):
- Morning surf: Morning surf (30 May, local time) - 1.5ft (0.5m), 10s period with E swell.
- Afternoon surf: Afternoon surf (30 May, local time) - 2ft (0.6m), 10s period with ESE swell.
- Evening surf: Evening surf (30 May, local time) - 2ft (0.6m), 11s period with E swell.
The current surf forecast for Niyodo Rivermouth at 6AM is: 0.5m 10s primary swell from a East direction and 0.3m 6s secondary swell from a South-southeast direction (forecast issued at 02:00am May 30). An open ocean swell of 0.4m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 May) | 1.5ft (0.5m) | 10s |
| Afternoon (30 May) | 2ft (0.6m) | 10s |
| Evening (30 May) | 2ft (0.6m) | 11s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 25°C on Sat morning, min 18°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 30 | Sunday 31 | Monday 1 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
E 10 | E 10 | E 10 | E 10 | E 12 | ESE 10 | E 11 | E 11 | E 11 | S 16 | S 14 | S 14 | S 13 | S 12 | S 12 | S 12 | SSE 12 | S 15 | S 14 | S 14 | SSW 15 | S 14 | S 15 | S 14 | |
47 | 47 | 47 | 48 | 98 | 83 | 89 | 88 | 88 | 124 | 203 | 293 | 408 | 439 | 488 | 480 | 462 | 640 | 573 | 1127 | 1092 | 1541 | 2650 | 2578 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | glassy | on | on | glassy | glassy | off | off | off | glassy | glassy | on | glassy | glassy | glassy | off | off | on | on | on | cross-on | glassy | |
High Tide | 4:31AM1.67m | 6:04PM1.68m | 5:02AM1.68m | 6:40PM1.69m | 5:34AM1.69m | 7:15PM1.68m | ||||||||||||||||||
Low Tide | 10:58PM0.91m | 11:17AM0.23m | 11:33PM0.93m | 11:50AM0.19m | 00:06AM0.95m | 12:24PM0.17m | ||||||||||||||||||
 | |  | | |  | |  |  | |  | | | | | | | | | | | | | | |
 | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:08 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 20 | 19 | 19 | 24 | 25 | 25 | 24 | 22 | 21 | 21 | 21 | 23 | 24 | 22 | 21 | 20 | 19 | 18 | 18 | 22 | 23 | 23 | 22 | 21 |
20 | 19 | 18 | 24 | 24 | 25 | 26 | 24 | 22 | 22 | 22 | 25 | 25 | 22 | 23 | 22 | 21 | 19 | 19 | 23 | 23 | 23 | 22 | 23 | |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 10 | E 12 | ESE 10 | E 11 | E 11 | E 11 | ESE 11 | S 14 | S 14 | S 13 | S 12 | S 12 | S 12 | SSE 12 | SSE 11 | S 14 | S 14 | S 13 | S 14 | S 15 | S 14 |
 kJ | 47 | 47 | 47 | 48 | 98 | 83 | 89 | 88 | 88 | 105 | 203 | 293 | 408 | 439 | 488 | 480 | 462 | 303 | 573 | 1127 | 976 | 1541 | 2650 | 2578 |
Swell 2 Height (m) Direction Period (s) | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 5 | SSE 5 | SSE 5 | S 16 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | E 11 | E 11 | S 15 | S 15 | SSE 11 | SSW 18 | SSW 15 | SSW 16 | E 10 | E 10 |
| kJ | 13 | 13 | 6 | 6 | 6 | 6 | 6 | 3 | 5 | 124 | 135 | 135 | 149 | 91 | 85 | 83 | 302 | 640 | 297 | 670 | 1092 | 844 | 50 | 49 |
Swell 3 Height (m) Direction Period (s) | SW 6 | ESE 12 | ESE 12 | ESE 12 | SE 9 | SW 6 | SE 9 | SE 7 | S 16 | SE 9 | SE 9 | SSE 9 | SSE 9 | SE 9 | SE 12 | S 16 | E 10 | ESE 11 | SSW 18 | ESE 10 | ESE 10 | E 10 | SE 11 | SE 11 |
| kJ | 10 | 29 | 28 | 29 | 3 | 1 | 3 | 7 | 20 | 3 | 20 | 8 | 8 | 3 | 22 | 181 | 52 | 88 | 413 | 85 | 59 | 53 | 19 | 20 |
Wind waves Height (m) Direction Period (s) | ENE 4 | ENE 4 | ENE 4 | NE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 5 | — | — | — | — | SE 6 |
| kJ | 4 | 3 | 6 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 17 | — | — | — | — | 30 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 330 | 58 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 58 | 0 | 0 | 0 | 0 | 0 | 55 | 82 | 58 | 29 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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