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Surf Forecasts:
4 Bobs surfForecast / Mentawi Islands / Indonesia
12 Day Weather and Surf, issued 6 am Saturday 30 Aug 2025 WIB
Best Forecast Surf Conditions for 4 Bobs this week:
The surf forecast for 4 Bobs over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 30) at 10AM. The primary swell is predicted to be 1.6m and 12s period with a secondary swell of 0.4m and 19s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at 4 Bobs in the next 12 days are 2.1m 17s and forecast to arrive on Friday (Sep 05) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sat 30th Aug) | 5ft (1.6m) 12s |
| Best Surf | 1AM (Mon 1st Sep) | 3ft (0.9m) 19s |
| Most Powerful | 7PM (Fri 5th Sep) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for 4 Bobs over the next 12 days.
Short Range Forecast Heavy rain (total 38mm), heaviest during Sat night. Warm (max 28°C on Mon afternoon, min 24°C on Sat night). Wind will be generally light. | Days 3-6 Weather Summary Moderate rain (total 19mm), heaviest on Wed night. Warm (max 28°C on Tue morning, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 30 | Sunday 31 | Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | Friday 05 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 12 | 11 | 11 | 10 | 10 | 19 | 17 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 14 | 13 | 12 | 18 | 19 | 18 | 16 |
Wave (?)Graph  | |||||||||||||||||||||
| Energy (?) | 825 | 802 | 894 | 975 | 1203 | 1423 | 1563 | 1555 | 1283 | 963 | 922 | 816 | 532 | 499 | 464 | 361 | 375 | 999 | 2062 | 2433 | 2042 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross- on | on | cross- on | on | glass | glass | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | glass | glass | off | glass | cross- on | cross- off | cross | off |
High Tide / height (m) | 10:33PM 0.93 | 9:50AM 0.63 | 11:22PM 0.86 | 10:00AM 0.54 | 12:55AM 0.82 | 10:17AM 0.46 | 1:53PM 0.46 | 2:41AM 0.85 | 3:49PM 0.52 | 3:49AM 0.93 | 4:42PM 0.61 | 4:38AM 1.03 | 5:19PM 0.73 | ||||||||
Low Tide / height (m) | 3:47PM 0.18 | 4:50AM 0.34 | 4:21PM 0.23 | 5:51AM 0.41 | 5:04PM 0.30 | 7:29AM 12:14PM 0.44 0.46 | 6:12PM 0.35 | 10:17AM 0.38 | 7:51PM 0.37 | 10:47AM 0.30 | 9:21PM 0.34 | 11:13AM 0.21 | 10:25PM 0.26 | ||||||||
Saturday 30 | Sunday 31 | Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | Friday 05 | |||||||||||||||
| Sunrise | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:18 | - | - | 6:18 | - | - |
| Sunset | - | 6:24 | - | - | 6:24 | - | - | 6:24 | - | - | 6:23 | - | - | 6:23 | - | - | 6:23 | - | - | 6:23 | - |
 | |  |  | |  |  | | |  | | | | | | | | | | |  | |
Rain (mm) | 4 | 5 | 25 | 1 | 1 | - | - | 2 | - | - | 1 | 4 | 1 | - | 6 | - | 1 | 6 | 5 | 9 | 15 |
| Temp. °C | 27 | 27 | 26 | 25 | 26 | 26 | 27 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 26 | 26 | 26 | 26 |
| Feels °C (?) | 31 | 30 | 29 | 27 | 28 | 29 | 32 | 32 | 31 | 32 | 32 | 30 | 32 | 32 | 33 | 32 | 32 | 29 | 29 | 29 | 28 |
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Recent Eyeball Surf Reports for Mentawi Islands
Continuing clean conditions at 4 Bobs (calm at MiaPadang 165 km from 4 Bobs). 1.4m 12s groundswell from the S with a 0.3m 14s groundswell from the W. 2 swells combining to make bigger set waves.
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.
Information about the 4 Bobs Surf forecast
The above surf forecast table for 4 Bobs provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at 4 Bobs can be found by selecting the local surf guide option on the grey menu. Our 4 Bobs surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (4 Bobs) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for 4 Bobs may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Mentawi Islands? If you are looking for accommodation near 4 Bobs, camping, hotels and holiday cottages in Mentawi Islands, consider staying in Padang which is 157 km (98 miles) away.
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