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:
Miramar surfForecast / Douro & Minho / Portugal
48hr Weather and Surf, issued 11 am Friday 12 Dec 2025 WETForecast update in hr min s Forecast update imminent
Miramar surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Miramar sea temperature is
15.5° C
(Which is normal for this time of year)How big are the waves at Miramar today?
The current surf forecast for Miramar at 4PM is: 4.5m 19s primary swell from a West-northwest direction (forecast issued at 11:00am December 12). The wind direction is predicted to be cross-offshore and the swell rating is 11.
| Time (WET) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 11ft (3.5m) | 16s |
| Afternoon (12 Dec) | 15ft (4.5m) | 19s |
| Evening (12 Dec) | 16ft (5.0m) | 18s |
Table - waves today at Miramar. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| 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) (?) | 16 | 18 | 19 | 19 | 18 | 18 | 18 | 17 | 17 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 6638 | 10148 | 15215 | 16036 | 15594 | 13583 | 11899 | 9908 | 8147 | 6063 | 4821 | 4108 | 2913 | 2374 | 2093 | 1519 | 1306 | 1170 | 1306 | 894 | 1887 | 1997 | 1883 | 1781 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | off | off | off | off | glass | glass | glass | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 8:40AM 2.43 | 9:25PM 2.17 | 9:45AM 2.33 | 10:28PM 2.20 | 10:47AM 2.29 | 11:24PM 2.28 | ||||||||||||||||||
Low Tide / height (m) | 3:09PM 0.77 | 3:25AM 0.93 | 4:11PM 0.81 | 4:34AM 0.93 | 5:07PM 0.80 | 5:33AM 0.86 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| Sunrise | 7:48 | - | - | - | - | - | - | - | 7:50 | - | - | - | - | - | - | - | 7:50 | - | - | - | - | - | - | - |
| Sunset | - | - | 5:06 | - | - | - | - | - | - | - | 5:06 | - | - | - | - | - | - | - | 5:06 | - | - | - | - | - |
 | |  |  | |  |  |  |  | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | 1 | 3 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 12 | 13 | 12 | 11 | 11 | 12 | 13 | 13 | 12 | 14 | 16 | 15 | 14 | 13 | 12 | 12 | 12 | 14 | 15 | 14 | 14 | 12 | 12 | 12 |
| Feels °C (?) | 9 | 11 | 9 | 8 | 8 | 9 | 10 | 10 | 9 | 11 | 13 | 12 | 12 | 11 | 10 | 10 | 10 | 12 | 14 | 13 | 12 | 9 | 9 | 9 |
- 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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