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:
Slufter surfForecast / Netherlands / Netherlands
48hr Weather and Surf, issued 12 am Wednesday 17 Dec 2025 CETForecast update in hr min s Forecast update imminent
Slufter surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Slufter sea temperature is
8.4° C
(Which is normal for this time of year)How big are the waves at Slufter today?
The current surf forecast for Slufter at 7AM is: 0.4m 3s primary swell from a Southwest direction and 0.1m 6s secondary swell from a North direction (forecast issued at 12:00am December 17). The wind direction is predicted to be onshore.
| Time (CET) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 1ft (0.3m) | 4s |
| Afternoon (17 Dec) | 1.5ft (0.4m) | 4s |
| Evening (17 Dec) | 2.5ft (0.8m) | 4s |
Table - waves today at Slufter. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 5 | 4 | 3 | 3 | 4 | 4 | 4 | 3 | 4 | 5 | 6 | 6 | 7 | 7 | 7 | 5 | 6 | 7 | 7 | 6 | 5 | 5 | 5 | 5 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 6 | 5 | 2 | 2 | 3 | 7 | 4 | 7 | 26 | 80 | 156 | 190 | 208 | 178 | 64 | 87 | 186 | 263 | 196 | 71 | 36 | 24 | 27 | 23 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | on | on | on | cross- on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross- on | cross- on | on | cross- on | cross- on | cross- on |
High Tide / height (m) | 12:45AM 2.44 | 8:06AM 0.72 | 1:02PM 2.37 | 1:26AM 2.46 | 8:51AM 0.70 | 1:40PM 2.45 | 2:03AM 2.47 | 9:33AM 0.66 | 2:17PM 2.53 | |||||||||||||||
Low Tide / height (m) | 6:31AM 0.65 | 9:09AM 0.68 | 7:09PM 0.52 | 7:18AM 9:52AM 0.58 0.64 | 7:47PM 0.54 | 8:00AM 0.53 | 10:28AM 0.61 | |||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 8:45 | - | - | - | - | - | - | - | 8:45 | - | - | - | - | - | - | - | 8:47 | - | - | - |
| Sunset | - | - | - | - | - | - | 4:32 | - | - | - | - | - | - | - | 4:32 | - | - | - | - | - | - | - | 4:32 | - |
 | | | |  |  | | | | | | |  | | | | |  | | | | |  |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | 1 | 1 | - | - | - | - | - |
| Temp. °C | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 10 | 11 | 12 | 11 | 11 | 10 | 9 | 9 | 9 | 9 |
| Feels °C (?) | 7 | 7 | 7 | 8 | 7 | 5 | 4 | 2 | 1 | 0 | -2 | -2 | -1 | 1 | 1 | 1 | 2 | 3 | 4 | 3 | 3 | 4 | 4 | 4 |
- 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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