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:
Osaki surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 8 am Friday 12 Dec 2025 JSTForecast update in hr min s Forecast update imminent
Osaki surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Osaki sea temperature is
18.2° C
(Which is 1.3°C colder than average for this time of year)How big are the waves at Osaki today?
The current surf forecast for Osaki at 2PM is: 0.1m 11s primary swell from a Southeast direction and 0.1m 5s secondary swell from a South direction, 0.1m 7s secondary swell from a Southwest direction (forecast issued at 08:00am December 12). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 1ft (0.3m) | 7s |
| Afternoon (12 Dec) | 0.5ft (0.1m) | 7s |
| Evening (12 Dec) | 0.5ft (0.1m) | 10s |
Table - waves today at Osaki. (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 | 7 | 11 | 11 | 11 | 10 | 12 | 15 | 15 | 14 | 11 | 11 | 11 | 11 | 7 | 7 | 6 | 6 | 8 | 9 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 27 | 10 | 4 | 2 | 2 | 2 | 3 | 4 | 4 | 4 | 2 | 2 | 2 | 2 | 11 | 15 | 10 | 10 | 43 | 236 | 346 | 666 | 621 | 347 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | off | off | off | off | off | off | cross- off | cross- off | cross- off | off | off | off | off | off | off | glass | cross- on | cross | cross | cross- off |
High Tide / height (m) | 10:41AM 1.32 | 9:33PM 1.17 | 11:22AM 1.31 | 11:07PM 1.11 | 12:01PM 1.31 | 12:49AM 1.10 | ||||||||||||||||||
Low Tide / height (m) | 3:27AM 0.33 | 4:28PM 0.87 | 4:19AM 0.47 | 5:39PM 0.76 | 5:16AM 0.61 | 6:45PM 0.62 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| Sunrise | - | 6:39 | - | - | - | - | - | - | - | 6:41 | - | - | - | - | - | - | - | 6:41 | - | - | - | - | - | - |
| Sunset | - | - | - | 4:29 | - | - | - | - | - | - | - | 4:29 | - | - | - | - | - | - | - | 4:30 | - | - | - | - |
 |  |  | |  | | |  | | | | |  | | | | |  | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | - | 3 | 1 | 3 | - | - | - | - | - |
| Temp. °C | 7 | 7 | 9 | 9 | 7 | 6 | 5 | 5 | 5 | 4 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 8 | 10 | 13 | 13 | 11 | 10 |
| Feels °C (?) | -5 | -3 | 0 | 0 | -2 | -2 | -2 | -1 | -2 | -3 | 0 | 2 | 1 | 0 | -1 | 0 | 1 | -1 | 2 | 9 | 9 | 8 | 7 | 6 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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