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:
Gileston surfForecast / Wales – South East / UK
48hr Weather and Surf, issued 5 pm Saturday 13 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Gileston surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Gileston sea temperature is
10.0° C
(Which is 1.3°C colder than average for this time of year)How big are the waves at Gileston today?
The current surf forecast for Gileston at 12AM is: 1.2m 9s primary swell from a West direction and 0.6m 13s secondary swell from a West direction, 0.4m 3s secondary swell from a South-southwest direction (forecast issued at 05:00pm December 13). The wind direction is predicted to be onshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | 5ft (1.6m) | 12s |
| Afternoon (14 Dec) | 5ft (1.6m) | 12s |
| Evening (14 Dec) | 5.5ft (1.7m) | 12s |
Table - waves today at Gileston. (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) (?) | 14 | 14 | 8 | 9 | 9 | 10 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 12 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 429 | 605 | 171 | 225 | 302 | 363 | 743 | 736 | 748 | 819 | 791 | 805 | 1024 | 805 | 614 | 503 | 581 | 498 | 440 | 383 | 394 | 476 | 496 | 515 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | glass | off | off | cross- off |
High Tide / height (m) | 1:21PM 7.14 | 1:59AM 6.88 | 2:28PM 7.06 | 3:03AM 7.01 | 3:28PM 7.19 | 3:57AM 7.29 | ||||||||||||||||||
Low Tide / height (m) | 7:40PM 2.74 | 8:05AM 2.90 | 8:40PM 2.76 | 9:06AM 2.82 | 9:35PM 2.63 | 10:01AM 2.61 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 8:10 | - | - | - | - | - | - | - | 8:11 | - | - | - | - | - | - | - | 8:11 | - |
| Sunset | 4:05 | - | - | - | - | - | - | - | 4:05 | - | - | - | - | - | - | - | 4:05 | - | - | - | - | - | - | - |
 |  |  |  | | | |  | | | |  | |  |  | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | 2 | 5 | 8 | 7 | 6 | 7 | 6 | 1 | - | - | 1 | - | - |
| Temp. °C | 10 | 9 | 8 | 8 | 9 | 9 | 9 | 11 | 11 | 11 | 12 | 12 | 11 | 11 | 10 | 11 | 11 | 10 | 9 | 9 | 9 | 8 | 8 | 9 |
| Feels °C (?) | 6 | 4 | 3 | 3 | 4 | 3 | 3 | 5 | 5 | 5 | 6 | 7 | 5 | 4 | 4 | 5 | 7 | 7 | 5 | 6 | 7 | 5 | 5 | 7 |
- 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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