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:
Praia dos Aivados surfForecast / Alentejo / Portugal
48hr Weather and Surf, issued 5 am Tuesday 16 Dec 2025 WETForecast update in hr min s Forecast update imminent
Praia dos Aivados surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Praia dos Aivados sea temperature is
16.6° C
(Which is normal for this time of year)How big are the waves at Praia dos Aivados today?
The current surf forecast for Praia dos Aivados at 8AM is: 5.0m 10s primary swell from a Northwest direction and 1.6m 15s secondary swell from a Northwest direction, 1.0m 13s secondary swell from a West-northwest direction (forecast issued at 05:00am December 16). The wind direction is predicted to be cross-onshore.
| Time (WET) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 18ft (5.5m) | 10s |
| Afternoon (16 Dec) | 20ft (6.0m) | 13s |
| Evening (16 Dec) | 18ft (5.5m) | 13s |
Table - waves today at Praia dos Aivados. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Fri 19 | |||||||||||||||||||||
| 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 | 6 PM | 9 PM | 0 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 9 | 10 | 10 | 11 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 23 | 21 | 21 | 19 | 19 | 18 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2055 | 2787 | 6015 | 8751 | 11800 | 11867 | 10613 | 9485 | 6937 | 5404 | 4649 | 3838 | 3170 | 2682 | 2111 | 1828 | 1523 | 1572 | 5025 | 14726 | 16808 | 16083 | 15584 | 12592 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | on | on | on | on | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | off | off | cross- off |
High Tide / height (m) | 12:06PM 2.26 | 12:29AM 2.38 | 12:48PM 2.33 | 1:07AM 2.48 | 1:28PM 2.39 | |||||||||||||||||||
Low Tide / height (m) | 5:57AM 0.74 | 6:12PM 0.67 | 6:39AM 0.64 | 6:51PM 0.61 | 7:18AM 0.54 | 7:27PM 0.54 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Fri 19 | |||||||||||||||||||||
| Sunrise | - | - | 7:43 | - | - | - | - | - | - | - | 7:43 | - | - | - | - | - | - | - | 7:43 | - | - | - | - | - |
| Sunset | - | - | - | - | 5:16 | - | - | - | - | - | - | - | 5:16 | - | - | - | - | - | - | - | 5:17 | - | - | - |
 |  |  |  |  |  |  | |  | |  | | | | | | | | | | | | | | |
Rain (mm) | 2 | 3 | 7 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 11 | 10 | 14 | 15 | 14 | 13 | 12 | 12 | 12 | 12 | 15 | 16 | 15 | 14 | 14 |
| Feels °C (?) | 6 | 4 | 3 | 4 | 3 | 4 | 5 | 7 | 7 | 7 | 6 | 11 | 12 | 12 | 11 | 11 | 10 | 10 | 10 | 13 | 13 | 13 | 12 | 12 |
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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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