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:
The Box surfForecast / Valencia / Spain
48hr Weather and Surf, issued 6 am Monday 15 Dec 2025 CETForecast update in hr min s Forecast update imminent
The Box surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's The Box sea temperature is
17.1° C
(Which is 1.6°C warmer than normal for this time of year)How big are the waves at The Box today?
The current surf forecast for The Box at 12PM is: 0.6m 5s primary swell from a East direction and 0.4m 4s secondary swell from a North-northwest direction (forecast issued at 06:00am December 15). An open ocean swell of 0.4m 4s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (CET) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 2ft (0.6m) | 5s |
| Afternoon (15 Dec) | 1.5ft (0.5m) | 5s |
| Evening (15 Dec) | 0.5ft (0.2m) | 4s |
Table - waves today at The Box. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 7 | 7 | 7 | 4 | 6 | 7 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 26 | 16 | 17 | 18 | 14 | 8 | 1 | 6 | 6 | 7 | 3 | 4 | 4 | 10 | 10 | 19 | 40 | 37 | 34 | 236 | 352 | 245 | 277 | 268 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross | glass | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | glass | cross- on | on | cross- on | on | on | on | on | cross- on |
High Tide / height (m) | 8:28AM 0.09 | 8:32AM 0.11 | 8:48AM 0.12 | |||||||||||||||||||||
Low Tide / height (m) | 11:08PM 0.02 | 11:02PM 0.01 | 11:06PM 0.01 | |||||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| Sunrise | - | - | 8:08 | - | - | - | - | - | - | - | 8:10 | - | - | - | - | - | - | - | 8:11 | - | - | - | - | - |
| Sunset | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:37 | - | - | - |
 | |  | | | |  |  | | |  |  | | | |  | | | | | | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 1 | - | - | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 2 |
| Temp. °C | 15 | 14 | 14 | 15 | 15 | 15 | 16 | 16 | 15 | 15 | 15 | 16 | 16 | 15 | 15 | 14 | 13 | 13 | 14 | 16 | 16 | 16 | 16 | 15 |
| Feels °C (?) | 14 | 12 | 12 | 13 | 15 | 13 | 14 | 13 | 12 | 11 | 10 | 10 | 10 | 10 | 12 | 13 | 12 | 10 | 12 | 11 | 11 | 13 | 14 | 13 |
- 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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