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:
Maenporth surfForecast / Cornwall (South) / UK
48hr Weather and Surf, issued 5 pm Saturday 13 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Maenporth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Maenporth sea temperature is
12.4° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Maenporth today?
The current surf forecast for Maenporth at 12AM is: 2.5m 13s primary swell from a West-southwest direction (forecast issued at 05:00pm December 13). An open ocean swell of 3.0m 13s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | 11ft (3.5m) | 13s |
| Afternoon (14 Dec) | 11ft (3.5m) | 13s |
| Evening (14 Dec) | 13ft (4.0m) | 13s |
Table - waves today at Maenporth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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 | 9 AM | 12 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 3771 | 3163 | 2826 | 2528 | 2767 | 2962 | 3499 | 4308 | 4647 | 5212 | 5316 | 5663 | 5723 | 5564 | 4989 | 3301 | 3372 | 453 | 307 | 203 | 163 | 140 | 85 | 62 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 12:14PM 4.30 | 12:49AM 3.92 | 1:11PM 4.25 | 1:42AM 4.00 | 2:01PM 4.24 | 2:29AM 4.13 | ||||||||||||||||||
Low Tide / height (m) | 6:46PM 1.84 | 7:06AM 1.97 | 7:57PM 1.85 | 8:18AM 1.91 | 8:54PM 1.76 | 9:16AM 1.78 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 8:11 | - | - | - | - | - | - | - | 8:11 | - | - | - | - | - | - | - | 8:12 | - |
| Sunset | 4:16 | - | - | - | - | - | - | - | 4:16 | - | - | - | - | - | - | - | 4:16 | - | - | - | - | - | - | - |
 |  |  | | | | | | | | |  | |  |  | |  | | | | | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | 2 | 4 | 8 | 8 | 6 | 2 | - | - | - | - | - | - | - |
| Temp. °C | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 10 |
| Feels °C (?) | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 4 | 7 | 6 | 6 | 7 | 5 | 5 | 4 | 4 | 5 |
- 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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