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 12 pm Saturday 13 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 4PM is: 1.2m 7s primary swell from a West direction and 0.6m 13s secondary swell from a South-southwest direction (forecast issued at 12:00pm December 13). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 2ft (0.6m) | 13s |
| Afternoon (13 Dec) | 4ft (1.2m) | 7s |
| Evening (13 Dec) | 2.5ft (0.7m) | 13s |
Table - waves today at 4 Bobs. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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 | 4 AM | 7 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 7 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 14 | 13 | 13 | 13 | 13 | 18 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 139 | 137 | 150 | 192 | 147 | 138 | 169 | 131 | 169 | 177 | 142 | 230 | 363 | 347 | 264 | 223 | 182 | 149 | 253 | 229 | 253 | 253 | 260 | 255 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | off | off | off | cross- off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off |
High Tide / height (m) | 1:41PM 0.87 | 1:32AM 0.74 | 2:39PM 0.93 | 2:41AM 0.69 | 3:29PM 0.98 | 3:42AM 0.67 | ||||||||||||||||||
Low Tide / height (m) | 7:17PM 0.47 | 7:12AM 0.29 | 9:03PM 0.44 | 8:03AM 0.30 | 10:15PM 0.37 | |||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:09 |
| Sunset | - | - | 6:22 | - | - | - | - | - | - | - | 6:23 | - | - | - | - | - | - | - | 6:23 | - | - | - | - | - |
 | | |  | |  |  |  |  | |  | | | | | |  | | |  | |  | | | |
Rain (mm) | 12 | 5 | 4 | 3 | 1 | - | 1 | 1 | 1 | 2 | - | 1 | 4 | 4 | 4 | 3 | 6 | 7 | 13 | 10 | 6 | 2 | 2 | 1 |
| Temp. °C | 25 | 25 | 25 | 26 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 24 |
| Feels °C (?) | 28 | 27 | 27 | 28 | 29 | 29 | 28 | 29 | 28 | 28 | 28 | 28 | 27 | 27 | 26 | 27 | 27 | 27 | 24 | 25 | 26 | 26 | 27 | 27 |
- 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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