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Surf Forecasts:
4 Bobs surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 12 am Thursday 21 May 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
30.2° 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 7AM is: 1.3m 15s primary swell from a Southwest direction and 0.8m 9s secondary swell from a South direction (forecast issued at 12:00am May 21). The wind direction is predicted to be cross-offshore.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 4ft (1.2m) | 15s |
| Afternoon (21 May) | 3.5ft (1.1m) | 15s |
| Evening (21 May) | 4ft (1.2m) | 16s |
Table - waves today at 4 Bobs. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 32mm), heaviest during Thu morning. Warm (max 29°C on Wed night, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | ||||||||||||||||||||||
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 | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 14 | SSW 14 | SSW 14 | |
557 | 557 | 696 | 550 | 550 | 557 | 683 | 692 | 674 | 614 | 606 | 606 | 685 | 685 | 695 | 795 | 838 | 714 | 548 | 548 | 564 | 752 | 663 | 635 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | off | cross-off | cross-off | off | off | glassy | 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 | off | cross-off | cross-off | cross-off | |
High Tide | 9:27AM1.23m | 10:10PM0.73m | 10:24AM1.13m | 11:21PM0.73m | 11:27AM1.02m | |||||||||||||||||||
Low Tide | 2:32AM0.10m | 4:02PM0.11m | 3:25AM0.19m | 4:57PM0.17m | 4:26AM0.30m | 5:56PM0.23m | ||||||||||||||||||
 | |  | | | | | | | |  |  | | | |  |  | | | |  | | | | |
 | — | 6:18 | — | — | — | — | — | — | — | 6:18 | — | — | — | — | — | — | — | 6:18 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:20 | — | — |
3 | 4 | 3 | 5 | 4 | 1 | 1 | 2 | 1 | 1 | — | — | — | 1 | 1 | — | — | 1 | — | — | — | 1 | — | 1 | |
Temp °C | 28 | 28 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 28 | 29 | 28 | 28 | 27 | 27 | 27 | 28 | 29 | 29 | 29 | 28 |
32 | 31 | 28 | 29 | 29 | 29 | 31 | 29 | 28 | 27 | 25 | 27 | 30 | 30 | 29 | 30 | 29 | 30 | 30 | 31 | 32 | 32 | 32 | 32 | |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 14 | SSW 14 | SSW 14 |
 kJ | 557 | 557 | 696 | 550 | 550 | 557 | 683 | 692 | 674 | 614 | 606 | 606 | 685 | 685 | 695 | 795 | 838 | 714 | 548 | 548 | 564 | 752 | 663 | 635 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 9 | S 9 | S 9 | S 11 | S 10 | S 10 | S 10 | S 9 | S 9 | S 9 | W 6 | S 9 | S 9 | S 9 | S 8 | S 9 | S 8 | W 7 | W 7 | W 6 | W 7 | W 7 | W 8 |
| kJ | 224 | 101 | 101 | 101 | 178 | 146 | 120 | 117 | 111 | 85 | 62 | 36 | 57 | 58 | 56 | 35 | 39 | 35 | 57 | 58 | 39 | 43 | 47 | 43 |
Swell 3 Height (m) Direction Period (s) | WNW 7 | S 11 | S 11 | S 11 | NW 7 | NW 7 | NW 7 | NW 7 | W 15 | W 14 | SSE 9 | S 10 | W 6 | W 7 | WNW 7 | S 11 | S 13 | W 16 | S 8 | S 8 | SSE 8 | S 12 | S 12 | W 14 |
| kJ | 5 | 87 | 85 | 59 | 12 | 12 | 12 | 12 | 4 | 4 | 8 | 47 | 28 | 22 | 26 | 9 | 3 | 5 | 35 | 22 | 22 | 3 | 3 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | NW 7 | — | — | — | — | WNW 7 | W 6 | W 6 | — | — | — | WNW 7 | WNW 7 | WNW 4 | W 7 | NNW 4 | NNW 4 | — | — | — | — |
| kJ | — | — | — | 12 | — | — | — | — | 9 | 38 | 49 | — | — | — | 51 | 48 | 21 | 47 | 2 | 2 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 10 | 0 | 0 | 0 | 0 | 0 | 82 | 82 | 10 | 2 | 0 | 82 | 155 | 11 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Mentawi Islands | ||||||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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