Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Surf Forecasts:
Asakawa surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 pm Friday 12 Dec 2025 JSTForecast update in hr min s Forecast update imminent
Asakawa surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Asakawa sea temperature is
20.8° C
(Which is slightly warmer than usual)How big are the waves at Asakawa today?
The current surf forecast for Asakawa at 3AM is: 0.3m 10s primary swell from a East-southeast direction and 0.1m 15s secondary swell from a East direction (forecast issued at 08:00pm December 12). An open ocean swell of 1.5m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 1ft (0.3m) | 11s |
| Afternoon (13 Dec) | 1.5ft (0.4m) | 12s |
| Evening (13 Dec) | 1.5ft (0.4m) | 11s |
Table - waves today at Asakawa. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Fri 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| 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 | 6 AM | 9 AM | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 10 | 10 | 10 | 10 | 11 | 12 | 12 | 11 | 11 | 11 | 11 | 5 | 6 | 7 | 7 | 7 | 8 | 11 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 38 | 35 | 35 | 21 | 37 | 22 | 45 | 46 | 42 | 40 | 40 | 40 | 49 | 33 | 38 | 27 | 27 | 22 | 39 | 115 | 114 | 116 | 90 | 90 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | off | cross- off | cross- off | cross | glass | glass | glass | cross- on | cross- off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | glass | glass |
High Tide / height (m) | 12:04AM 1.27 | 12:52PM 1.50 | 1:47AM 1.26 | 1:38PM 1.51 | 3:09AM 1.33 | 2:20PM 1.53 | ||||||||||||||||||
Low Tide / height (m) | 6:30PM 0.89 | 6:05AM 0.79 | 7:42PM 0.77 | 7:14AM 0.90 | 8:37PM 0.64 | 8:22AM 0.97 | ||||||||||||||||||
Fri 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:56 | - | - | - | - | - | - | - | 6:58 | - | - | - | - | - | - | - | 6:58 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:53 | - | - | - | - | - | - | - | 4:54 | - | - | - | - | - | - | - | 4:54 |
 | | | |  |  |  | | |  |  | |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | 1 | 3 | 8 | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 5 | 3 | 2 | 2 | 2 | 5 | 10 | 10 | 8 | 10 | 11 | 13 | 12 | 14 | 11 | 11 | 8 | 7 | 7 | 6 | 6 | 8 | 11 | 11 |
| Feels °C (?) | -2 | -4 | -5 | -4 | -3 | 0 | 5 | 6 | 6 | 8 | 10 | 11 | 10 | 13 | 5 | 5 | 3 | 3 | 3 | 2 | 2 | 4 | 8 | 9 |
- 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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