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:
Marazion surfForecast / Cornwall (South) / UK
48hr Weather and Surf, issued 5 am Friday 12 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Marazion surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Marazion sea temperature is
12.3° C
(Which is slightly warmer than usual)How big are the waves at Marazion today?
The current surf forecast for Marazion at 9AM is: 5.5m 19s primary swell from a West-southwest direction (forecast issued at 05:00am December 12). The wind direction is predicted to be cross-onshore and the swell rating is 11.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 18ft (5.5m) | 19s |
| Afternoon (12 Dec) | 20ft (6.0m) | 18s |
| Evening (12 Dec) | 18ft (5.5m) | 18s |
Table - waves today at Marazion. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| 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) (?) | 16 | 15 | 19 | 18 | 18 | 18 | 18 | 18 | 17 | 16 | 16 | 16 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 14 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 5694 | 10520 | 19876 | 24172 | 23912 | 20558 | 18410 | 15913 | 13416 | 10045 | 7876 | 6148 | 4259 | 3673 | 3247 | 2914 | 3217 | 3352 | 3988 | 4263 | 4663 | 5862 | 4240 | 4206 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | on | on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 10:15AM 4.67 | 10:54PM 4.36 | 11:21AM 4.54 | 12:01AM 4.35 | 12:28PM 4.52 | |||||||||||||||||||
Low Tide / height (m) | 4:29AM 1.98 | 5:15PM 1.90 | 5:34AM 2.09 | 6:18PM 1.95 | 6:40AM 2.09 | 7:18PM 1.92 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| Sunrise | - | - | 8:11 | - | - | - | - | - | - | - | 8:11 | - | - | - | - | - | - | - | 8:12 | - | - | - | - | - |
| Sunset | - | - | - | - | 4:19 | - | - | - | - | - | - | - | 4:19 | - | - | - | - | - | - | - | 4:19 | - | - | - |
 |  |  |  | | |  |  | | |  | | | | | | | | | | | | | | |
Rain (mm) | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 12 | 12 |
| Feels °C (?) | 3 | 5 | 7 | 7 | 7 | 7 | 7 | 8 | 6 | 6 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 4 | 3 | 3 | 3 | 3 | 3 | 3 |
- 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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