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Surf Forecasts:
4 Bobs surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 12 pm Saturday 21 Mar 2026 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
29.9° C
(Which is normal for this time of year)How big are the waves at 4 Bobs today?
The current surf forecast for 4 Bobs at 9PM is: 0.9m 15s primary swell from a Southwest direction and 0.5m 11s secondary swell from a Southwest direction (forecast issued at 12:00pm March 21). The wind direction is predicted to be onshore.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Mar) | 2.5ft (0.8m) | 12s |
| Afternoon (21 Mar) | 2.5ft (0.7m) | 15s |
| Evening (21 Mar) | 3ft (0.9m) | 15s |
Table - waves today at 4 Bobs. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | |||||||||||||||||||||
| 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) (?) | 12 | 12 | 15 | 15 | 15 | 15 | 16 | 14 | 16 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 16 | 16 | 15 | 15 | 15 | 15 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 184 | 180 | 217 | 171 | 309 | 544 | 558 | 396 | 324 | 370 | 323 | 301 | 577 | 362 | 293 | 396 | 1003 | 452 | 726 | 822 | 917 | 857 | 746 | 756 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | glass | glass | cross- on | on | on | on | on | cross- on | on | on | on | on | cross- on | cross- on | cross- on | glass | glass | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 7:57PM 1.04 | 8:19AM 1.29 | 8:32PM 0.95 | 8:58AM 1.27 | 9:09PM 0.84 | |||||||||||||||||||
Low Tide / height (m) | 1:54PM -0.01 | 1:50AM -0.04 | 2:36PM 0.01 | 2:24AM -0.02 | 3:20PM 0.07 | 2:59AM 0.03 | ||||||||||||||||||
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:26 | - | - | - | - | - | - | - | 6:26 | - | - | - | - | - | - | - | 6:26 |
| Sunset | - | - | 6:32 | - | - | - | - | - | - | - | 6:32 | - | - | - | - | - | - | - | 6:31 | - | - | - | - | - |
 | | |  | |  |  |  |  | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | 1 | 1 | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 |
| Temp. °C | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 |
| Feels °C (?) | 30 | 31 | 32 | 31 | 31 | 32 | 30 | 29 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 32 | 33 | 32 | 31 | 31 | 31 | 29 | 30 |
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Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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