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:
Silvalde surfForecast / Beira / Portugal
48hr Weather and Surf, issued 11 am Saturday 13 Dec 2025 WETForecast update in hr min s Forecast update imminent
Silvalde surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Silvalde sea temperature is
15.4° C
(Which is normal for this time of year)How big are the waves at Silvalde today?
The current surf forecast for Silvalde at 3PM is: 3.0m 16s primary swell from a West-northwest direction (forecast issued at 11:00am December 13). The wind direction is predicted to be glassy and the swell rating is 11.
| Time (WET) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 13ft (4.0m) | 17s |
| Afternoon (13 Dec) | 10ft (3.0m) | 16s |
| Evening (13 Dec) | 8ft (2.5m) | 15s |
Table - waves today at Silvalde. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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 | 6 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 17 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 16 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 8147 | 6063 | 4821 | 4108 | 2825 | 2374 | 2093 | 1519 | 1306 | 1306 | 1306 | 1708 | 1941 | 1941 | 1830 | 1755 | 1581 | 1379 | 1512 | 1605 | 1657 | 3531 | 3465 | 2076 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | glass | cross- off | off | off | cross- off | cross- off | cross- off | glass | on | glass | cross- off | cross- off | off | cross- off | cross- off | cross- off | cross- off | cross- off | on | glass | cross | cross- on |
High Tide / height (m) | 9:46AM 2.33 | 10:29PM 2.20 | 10:48AM 2.29 | 11:25PM 2.28 | 11:44AM 2.31 | 12:13AM 2.39 | ||||||||||||||||||
Low Tide / height (m) | 4:12PM 0.81 | 4:35AM 0.93 | 5:08PM 0.80 | 5:34AM 0.86 | 5:56PM 0.76 | |||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | 7:50 | - | - | - | - | - | - | - | 7:50 | - | - | - | - | - | - | - | 7:50 | - | - | - | - | - | - | - |
| Sunset | - | - | 5:06 | - | - | - | - | - | - | - | 5:06 | - | - | - | - | - | - | - | 5:06 | - | - | - | - | - |
 | | |  | | | | | | | |  | | | | |  | |  |  | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 4 | 5 | 3 | - | - | 1 |
| Temp. °C | 13 | 14 | 16 | 16 | 14 | 13 | 13 | 12 | 12 | 14 | 15 | 14 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 |
| Feels °C (?) | 10 | 12 | 15 | 14 | 12 | 11 | 11 | 10 | 10 | 13 | 13 | 14 | 11 | 10 | 10 | 10 | 8 | 7 | 7 | 7 | 10 | 11 | 9 | 3 |
- 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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