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70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Surf Forecasts:
Uchiumi surfForecast / Kyu Shu / Japan
48hr Weather and Surf, issued 8 am Friday 12 Dec 2025 JSTForecast update in hr min s Forecast update imminent
Uchiumi surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Uchiumi sea temperature is
21.4° C
(Which is slightly cooler than normal)How big are the waves at Uchiumi today?
The current surf forecast for Uchiumi at 4PM is: 1.3m 6s primary swell from a Northeast direction and 0.6m 10s secondary swell from a East direction, 0.3m 12s secondary swell from a East direction (forecast issued at 08:00am December 12). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 4ft (1.2m) | 6s |
| Afternoon (12 Dec) | 4.5ft (1.3m) | 6s |
| Evening (12 Dec) | 5ft (1.5m) | 7s |
Table - waves today at Uchiumi. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 9 | 9 | 8 | 7 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 11 | 12 | 12 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 162 | 120 | 167 | 141 | 150 | 242 | 374 | 421 | 455 | 404 | 269 | 148 | 148 | 144 | 263 | 429 | 441 | 257 | 96 | 93 | 132 | 90 | 59 | 86 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 11:48AM 1.69 | 11:33PM 1.43 | 12:39PM 1.68 | 1:11AM 1.42 | 1:28PM 1.70 | 2:39AM 1.49 | ||||||||||||||||||
Low Tide / height (m) | 4:48AM 0.51 | 6:02PM 0.92 | 5:51AM 0.67 | 7:14PM 0.77 | 7:01AM 0.80 | 8:16PM 0.59 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| Sunrise | - | 7:03 | - | - | - | - | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:05 | - | - | - | - | - | - |
| Sunset | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:10 | - | - | - | - | - | - | - | 5:10 | - | - | - | - |
 |  |  | |  | |  | | |  |  | |  | | |  | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | 2 | 1 | 3 | 1 | 5 | 11 | - | - | - | - | - | - | - | - |
| Temp. °C | 13 | 13 | 13 | 12 | 11 | 11 | 10 | 10 | 11 | 12 | 13 | 14 | 14 | 15 | 16 | 14 | 13 | 11 | 12 | 12 | 10 | 9 | 9 | 8 |
| Feels °C (?) | 12 | 8 | 6 | 5 | 4 | 3 | 4 | 5 | 7 | 8 | 11 | 12 | 11 | 14 | 15 | 10 | 7 | 5 | 5 | 5 | 4 | 5 | 5 | 3 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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