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 2 pm Saturday 13 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 1.2°C colder than average for this time of year)How big are the waves at Osaki today?
The current surf forecast for Osaki at 9PM is: 0.1m 6s primary swell from a Southeast direction and 0.1m 11s secondary swell from a East direction (forecast issued at 02:00pm December 13). The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | - | - |
| Afternoon (13 Dec) | 0.5ft (0.1m) | 11s |
| Evening (13 Dec) | 0.5ft (0.1m) | 11s |
Table - waves today at Osaki. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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 | 6 AM | 9 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 11 | 5 | 6 | 6 | 7 | 8 | 9 | 10 | 9 | 9 | 9 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2 | 2 | 2 | 2 | 4 | 10 | 20 | 53 | 110 | 443 | 1154 | 881 | 266 | 562 | 108 | 38 | 35 | 22 | 21 | 20 | 12 | 11 | 14 | 7 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | off | off | off | off | off | off | glass | cross- off | cross- on | cross- off | cross- off | cross- off | cross- off | glass | cross- off | off | off | off | off | off | off |
High Tide / height (m) | 11:22AM 1.31 | 11:07PM 1.11 | 12:01PM 1.31 | 12:49AM 1.10 | 12:41PM 1.32 | 2:21AM 1.15 | ||||||||||||||||||
Low Tide / height (m) | 5:39PM 0.76 | 5:16AM 0.61 | 6:45PM 0.62 | 6:20AM 0.74 | 7:42PM 0.47 | 7:25AM 0.84 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:41 | - | - | - | - | - | - | - | 6:41 | - | - | - | - | - | - | - | 6:43 |
| Sunset | - | 4:29 | - | - | - | - | - | - | - | 4:30 | - | - | - | - | - | - | - | 4:30 | - | - | - | - | - | - |
 |  |  | |  | | |  | | |  | | | | |  | | | | |  | | | | |
Rain (mm) | - | - | - | - | 1 | - | 2 | 2 | 3 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 6 | 7 | 7 | 7 | 6 | 6 | 6 | 7 | 8 | 10 | 12 | 12 | 12 | 12 | 10 | 11 | 12 | 12 | 11 | 10 | 9 | 8 | 7 | 7 |
| Feels °C (?) | 1 | 2 | 2 | 2 | 0 | -1 | 0 | 1 | 2 | 9 | 9 | 10 | 9 | 4 | 4 | 5 | 9 | 8 | 4 | 4 | 4 | 2 | 1 | 2 |
- 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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