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 Sunday 14 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
18.0° C
(Which is 1.4°C colder than average for this time of year)How big are the waves at Osaki today?
The current surf forecast for Osaki at 7PM is: 2.5m 8s primary swell from a Southwest direction and 2.0m 10s secondary swell from a South direction (forecast issued at 02:00pm December 14). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | - | - |
| Afternoon (14 Dec) | 5ft (1.5m) | 10s |
| Evening (14 Dec) | 10ft (3.0m) | 9s |
Table - waves today at Osaki. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| 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) (?) | 7 | 10 | 10 | 9 | 9 | 9 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 5 | 5 | 5 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 54 | 402 | 865 | 1277 | 342 | 688 | 77 | 58 | 34 | 21 | 20 | 18 | 11 | 14 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 2 | 2 | 2 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | glass | cross | cross- on | cross- on | cross | cross- off | off | glass | cross- off | cross- off | off | off | off | off | off | glass | cross- on | cross- on | glass | cross- off | cross- off | off | off |
High Tide / height (m) | 12:01PM 1.31 | 12:49AM 1.10 | 12:41PM 1.32 | 2:21AM 1.15 | 1:19PM 1.35 | 3:35AM 1.23 | ||||||||||||||||||
Low Tide / height (m) | 6:45PM 0.62 | 6:20AM 0.74 | 7:42PM 0.47 | 7:25AM 0.84 | 8:34PM 0.32 | 8:26AM 0.92 | ||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:41 | - | - | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:43 |
| Sunset | - | 4:30 | - | - | - | - | - | - | - | 4:30 | - | - | - | - | - | - | - | 4:30 | - | - | - | - | - | - |
 |  |  | | | | |  | | | | |  |  | | | | | | | | | | | |
Rain (mm) | 21 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 7 | 10 | 12 | 12 | 11 | 11 | 10 | 10 | 12 | 13 | 12 | 10 | 9 | 8 | 7 | 7 | 9 | 10 | 11 | 11 | 10 | 10 | 9 | 9 |
| Feels °C (?) | 0 | 8 | 8 | 7 | 5 | 5 | 5 | 5 | 9 | 9 | 6 | 4 | 3 | 2 | 0 | 1 | 6 | 6 | 8 | 9 | 7 | 7 | 5 | 4 |
- 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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