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Surf Forecasts:
4 Bobs surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 6 am Wednesday 10 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
29.5° C
(Which is slightly warmer than usual)How big are the waves at 4 Bobs today?
The current surf forecast for 4 Bobs at 10AM is: 0.9m 14s primary swell from a Southwest direction and 0.4m 8s secondary swell from a South-southeast direction, 1.2m 7s secondary swell from a West direction (forecast issued at 06:00am December 10). The wind direction is predicted to be cross-offshore.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Dec) | 3.5ft (1.0m) | 14s |
| Afternoon (10 Dec) | 3ft (0.9m) | 13s |
| Evening (10 Dec) | 3ft (0.9m) | 13s |
Table - waves today at 4 Bobs. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 10 | Thursday 11 | Friday 12 | Sat 13 | |||||||||||||||||||||
| 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) (?) | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 450 | 407 | 317 | 304 | 299 | 299 | 299 | 304 | 322 | 390 | 373 | 363 | 352 | 347 | 342 | 277 | 277 | 273 | 269 | 193 | 212 | 209 | 218 | 215 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- off | cross | cross- off | cross- off | cross- off | cross- off | cross | cross- on | cross- on | cross- off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 10:23AM 0.78 | 10:26PM 1.06 | 11:27AM 0.79 | 11:21PM 0.94 | 12:35PM 0.83 | 12:23AM 0.83 | ||||||||||||||||||
Low Tide / height (m) | 4:03AM 0.12 | 3:35PM 0.25 | 4:48AM 0.18 | 4:34PM 0.36 | 5:34AM 0.23 | 5:45PM 0.44 | ||||||||||||||||||
Wednesday 10 | Thursday 11 | Friday 12 | Sat 13 | |||||||||||||||||||||
| Sunrise | - | 6:07 | - | - | - | - | - | - | - | 6:07 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:22 | - | - | - | - | - | - | - | 6:22 | - | - | - | - | - | - | - | 6:22 | - | - | - |
 |  | | | |  | | | |  | |  |  |  |  | | |  |  | | |  | | | |
Rain (mm) | 6 | 5 | 3 | 4 | 4 | 5 | 7 | 9 | 9 | 12 | 20 | 6 | 5 | 1 | - | - | - | - | - | 1 | 1 | - | 2 | 3 |
| Temp. °C | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 23 | 24 | 23 | 24 | 25 | 25 | 25 | 25 | 26 | 27 | 27 | 27 | 26 | 26 |
| Feels °C (?) | 25 | 25 | 27 | 25 | 25 | 25 | 25 | 25 | 23 | 23 | 23 | 26 | 26 | 26 | 27 | 26 | 26 | 27 | 28 | 29 | 29 | 29 | 29 | 29 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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