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:
Choshi surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 pm Saturday 13 Dec 2025 JSTForecast update in hr min s Forecast update imminent
Choshi surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Choshi sea temperature is
17.2° C
(Which is 2.0°C colder than average for this time of year)How big are the waves at Choshi today?
The current surf forecast for Choshi at 1AM is: 1.1m 4s primary swell from a East-southeast direction and 0.1m 16s secondary swell from a Southeast direction (forecast issued at 08:00pm December 13). An open ocean swell of 0.4m 10s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | 3ft (0.9m) | 7s |
| Afternoon (14 Dec) | 8ft (2.5m) | 11s |
| Evening (14 Dec) | 8ft (2.4m) | 11s |
Table - waves today at Choshi. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sat 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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) (?) | 12 | 12 | 4 | 6 | 7 | 7 | 10 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 13 | 9 | 9 | 9 | 8 | 8 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 103 | 127 | 42 | 143 | 159 | 86 | 573 | 1542 | 1481 | 1298 | 831 | 338 | 260 | 111 | 58 | 43 | 41 | 34 | 41 | 28 | 26 | 18 | 18 | 116 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | on | on | cross- off | cross- off | cross- off | off | cross- off | off | cross- off | off | off | off | off | off | off | cross- off | cross- off | glass | cross- off | glass | cross- off | cross- off |
High Tide / height (m) | 11:29PM 0.95 | 11:23AM 1.25 | 1:26AM 0.98 | 12:03PM 1.29 | 2:40AM 1.05 | 12:42PM 1.33 | ||||||||||||||||||
Low Tide / height (m) | 5:52PM 0.74 | 4:33AM 0.75 | 6:58PM 0.59 | 5:36AM 0.85 | 7:45PM 0.45 | 6:42AM 0.92 | ||||||||||||||||||
Sat 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:37 | - | - | - | - | - | - | - | 6:37 | - | - | - | - | - | - | - | 6:39 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:23 | - | - | - | - | - | - | - | 4:23 | - | - | - | - | - | - | - | 4:23 |
 |  | |  | |  | |  |  | |  | | |  | | | | | | | |  | |  | |
Rain (mm) | - | 1 | 3 | 6 | 5 | 7 | 8 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 9 | 10 | 13 | 13 | 8 | 9 | 12 | 10 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 11 | 10 | 9 | 9 | 9 | 9 | 9 | 10 | 10 |
| Feels °C (?) | 4 | 6 | 9 | 10 | 3 | 6 | 7 | 6 | 9 | 7 | 3 | 2 | 0 | 1 | -1 | 1 | 2 | 3 | 5 | 6 | 5 | 6 | 6 | 6 |
- 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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