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 pm Monday 15 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
17.8° C
(Which is 1.5°C colder than average for this time of year)How big are the waves at Osaki today?
The current surf forecast for Osaki at 3AM is: 0.2m 8s primary swell from a South-southeast direction and 0.1m 4s secondary swell from a Southwest direction (forecast issued at 08:00pm December 15). An open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 0.5ft (0.2m) | 8s |
| Afternoon (16 Dec) | 0.5ft (0.2m) | 8s |
| Evening (16 Dec) | 0.5ft (0.1m) | 8s |
Table - waves today at Osaki. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | |||||||||||||||||||||
| 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) (?) | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 4 | 10 | 10 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 20 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 2 | 2 | 5 | 2 | 2 | 2 | 2 | 2 | 7 | 5 | 2 | 1 | 2 | 2 | 3 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | off | off | off | cross- on | on | glass | cross- off | cross- off | glass | off | cross- off | glass | cross- off | off | off | off | off | off | off | off |
High Tide / height (m) | 2:21AM 1.15 | 1:19PM 1.35 | 3:35AM 1.23 | 1:59PM 1.38 | 4:35AM 1.30 | 2:38PM 1.41 | ||||||||||||||||||
Low Tide / height (m) | 7:42PM 0.47 | 7:25AM 0.84 | 8:34PM 0.32 | 8:26AM 0.92 | 9:20PM 0.18 | 9:21AM 0.98 | ||||||||||||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:43 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:30 | - | - | - | - | - | - | - | 4:30 | - | - | - | - | - | - | - | 4:30 |
 | |  |  | |  | | | | | | | | | | | | | | | |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 11 | 10 | 8 | 8 | 7 | 7 | 9 | 10 | 11 | 11 | 10 | 10 | 10 | 10 | 11 | 11 | 12 | 12 | 10 | 9 | 8 | 8 | 9 | 10 |
| Feels °C (?) | 4 | 4 | 2 | 2 | 0 | 1 | 6 | 6 | 8 | 9 | 6 | 7 | 8 | 7 | 8 | 9 | 9 | 9 | 4 | 3 | 2 | 2 | 3 | 5 |
- 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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