Buy Less, Surf More This Black Friday
Surf-forecast is providing a free, all-access pass to our premium features and 12-day forecasts all weekend.
Surf Forecasts:
4 Bobs surfForecast / Mentawi Islands / Indonesia
48hr Weather and Surf, issued 6 am Sunday 07 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 11AM is: 0.6m 18s primary swell from a Southwest direction and 0.9m 12s secondary swell from a South-southwest direction (forecast issued at 06:00am December 07). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (07 Dec) | 3ft (0.9m) | 12s |
| Afternoon (07 Dec) | 3ft (0.9m) | 13s |
| Evening (07 Dec) | 2.5ft (0.7m) | 17s |
Table - waves today at 4 Bobs. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 07 | Monday 08 | Tuesday 09 | Wed 10 | |||||||||||||||||||||
| 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 | 12 | 12 | 13 | 13 | 12 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 158 | 180 | 245 | 255 | 252 | 243 | 322 | 381 | 381 | 432 | 502 | 489 | 459 | 435 | 479 | 543 | 543 | 466 | 466 | 529 | 521 | 390 | 384 | 384 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | cross- off | cross- off | cross | cross | cross | cross- off | off | off | cross- off | cross- off | glass | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | off | cross- off | cross- off | off |
High Tide / height (m) | 7:43AM 0.79 | 7:58PM 1.36 | 8:32AM 0.79 | 8:46PM 1.28 | 9:25AM 0.78 | 9:35PM 1.18 | ||||||||||||||||||
Low Tide / height (m) | 1:47AM -0.03 | 1:06PM 0.02 | 2:33AM 0.00 | 1:54PM 0.07 | 3:18AM 0.06 | 2:43PM 0.15 | ||||||||||||||||||
Sunday 07 | Monday 08 | Tuesday 09 | Wed 10 | |||||||||||||||||||||
| Sunrise | - | 6:05 | - | - | - | - | - | - | - | 6:07 | - | - | - | - | - | - | - | 6:07 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:20 | - | - | - | - | - | - | - | 6:21 | - | - | - | - | - | - | - | 6:21 | - | - | - |
 |  | | |  | | | | |  | | | | | | |  |  | | | | | | | |
Rain (mm) | 1 | 2 | 3 | 3 | 6 | 3 | 2 | 4 | 2 | - | - | 1 | 1 | 2 | 1 | 4 | 3 | 1 | 1 | 2 | 1 | 1 | 1 | 5 |
| Temp. °C | 26 | 26 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 26 | 25 |
| Feels °C (?) | 28 | 28 | 28 | 29 | 28 | 27 | 28 | 29 | 27 | 29 | 28 | 28 | 30 | 30 | 29 | 30 | 30 | 29 | 29 | 29 | 29 | 30 | 29 | 27 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Previously used in our snow jackets for mountain conditions, PrimaLoft® technology is making its debut in the surf industry. The aim is to bring mountain-grade warmth to the waves.
Vancouver Island’s Day Of Days With Reed Platenius
Surf-Forecast recently helped the 21-year-old Canadian pro surfer and adventurer score some cold water perfection at home.
5 Reasons Why Costa Rica Is A Surfer (and Non Surfer) Paradise
With or without a surfboard, Costa Rica is a bucket list destination that has shown what a nation is capable of when nature is put first.
Read more
Discover more articles and updates in the Greenroom.
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our 4 Bobs surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest