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:
4 Bobs surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 6 am Friday 12 Dec 2025 WIBForecast update in hr min s Forecast update imminent
4 Bobs surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's 4 Bobs sea temperature is
29.3° C
(Which is slightly warmer than usual)How big are the waves at 4 Bobs today?
The current surf forecast for 4 Bobs at 2PM is: 0.8m 12s primary swell from a Southwest direction and 0.7m 6s secondary swell from a West direction (forecast issued at 06:00am December 12). An open ocean swell of 0.3m 3s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 3ft (0.9m) | 13s |
| Afternoon (12 Dec) | 3ft (0.9m) | 12s |
| Evening (12 Dec) | 2.5ft (0.7m) | 14s |
Table - waves today at 4 Bobs. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| 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 | 10 PM | 1 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 13 | 12 | 12 | 14 | 14 | 14 | 7 | 7 | 7 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 277 | 273 | 269 | 193 | 212 | 209 | 218 | 215 | 215 | 171 | 172 | 143 | 137 | 149 | 147 | 256 | 169 | 248 | 244 | 177 | 232 | 123 | 123 | 140 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- off | off | off | cross- off | cross- off | cross- off | cross- on | cross- on | cross- on | cross | cross- off | cross- off |
High Tide / height (m) | 12:35PM 0.83 | 12:23AM 0.83 | 1:41PM 0.87 | 1:32AM 0.74 | 2:39PM 0.93 | |||||||||||||||||||
Low Tide / height (m) | 5:34AM 0.23 | 5:45PM 0.44 | 6:22AM 0.27 | 7:17PM 0.47 | 7:12AM 0.29 | 9:03PM 0.44 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| Sunrise | - | 6:09 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:22 | - | - | - | - | - | - | - | 6:22 | - | - | - | - | - | - | - | 6:23 | - | - | - |
 |  |  |  | |  | | | | | | | | | | | | | | | | | | | |
Rain (mm) | 2 | 10 | 1 | 1 | 3 | 2 | 3 | 2 | 5 | 6 | 8 | 2 | 6 | 5 | 4 | 4 | 1 | 1 | 1 | 3 | 1 | 2 | 2 | 4 |
| Temp. °C | 24 | 24 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 |
| Feels °C (?) | 25 | 24 | 27 | 28 | 28 | 27 | 26 | 27 | 26 | 27 | 25 | 26 | 26 | 27 | 28 | 28 | 28 | 28 | 30 | 30 | 30 | 28 | 28 | 26 |
- 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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