Surf Forecasts:
4 Bobs surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 4AM (local time) - 10ft (3.0m), 16s period, SSW swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 4AM (local time) - 10ft (3.0m), 16s period, SSW swell with 4,655 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 4AM (local time) - 10ft (3.0m), 16s period with SSW swell.
Best Forecast Surf Conditions for 4 Bobs this week:
The surf forecast for 4 Bobs over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 4AM. The primary swell is predicted to be 3.0m and 16s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at 4 Bobs in the next 16 days are 3.0m 16s and forecast to arrive on Thursday (Aug 20) at 4AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Thu 20th Aug) | 10ft (3.0m) 16s |
| Best Surf | 4AM (Thu 20th Aug) | 10ft (3.0m) 16s |
| Most Powerful | 4AM (Thu 20th Aug) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for 4 Bobs over the next 16 days.
Short Range ForecastModerate rain (total 12mm), heaviest on Wed night. Warm (max 28°C on Thu afternoon, min 27°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 46mm), heaviest during Sun night. Warm (max 28°C on Sat night, min 26°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 18 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 14 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4086 | 3378 | 2887 | 1937 | 1716 | 2931 | 2793 | 2140 | 1517 | 1038 | 949 | 3158 | 705 | 2339 | 1177 | 1225 | 899 | 731 | 590 | 607 | 489 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | on |
High Tide | 10:39AM0.65m | 11:55PM0.90m | 11:18AM0.55m | 1:13AM0.85m | 1:48PM0.49m | 2:42AM0.85m | 3:37PM0.51m | 3:51AM0.91m | 4:39PM0.58m | 4:43AM0.98m | 5:22PM0.67m | 5:23AM1.06m | 5:56PM0.77m | ||||||||
Low Tide | 4:57AM0.34m | 4:30PM0.22m | 5:56AM0.41m | 5:11PM0.28m | 7:35AM0.45m | 6:09PM0.34m | 11:10AM0.39m | 7:39PM0.37m | 11:23AM0.32m | 9:13PM0.35m | 11:36AM0.26m | 10:20PM0.30m | 11:54AM0.19m | 11:09PM0.23m | |||||||
 | |  |  |  |  | | | | | | | | | | | | | | |  | |
 | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — |
 | — | 6:27 | — | — | 6:27 | — | — | 6:27 | — | — | 6:27 | — | — | 6:27 | — | — | 6:25 | — | — | 6:25 | — |
mm | — | — | — | — | 2 | 5 | 3 | — | 6 | 6 | 1 | 9 | 6 | 1 | 13 | 4 | — | — | — | — | 1 |
Temp °C | 27 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 29 | 30 | 30 | 30 | 30 | 30 | 31 | 30 | 31 | 30 | 28 | 29 | 28 | 28 | 28 | 28 | 28 | 27 | 30 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 18 | SSW 13 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 14 | SW 16 |
| kJ | 4086 | 3378 | 2887 | 1937 | 1716 | 2931 | 2793 | 2140 | 1517 | 1038 | 889 | 3158 | 514 | 2339 | 1177 | 1225 | 899 | 731 | 590 | 607 | 489 |
Swell 2 Height (m) Direction Period (s) | W 10 | WNW 11 | SSW 22 | SSW 19 | SSW 18 | WNW 10 | WNW 9 | WNW 9 | S 18 | SSW 19 | SSW 19 | S 18 | SSW 16 | WNW 10 | SW 16 | WNW 9 | W 9 | S 7 | S 8 | S 8 | SSE 8 |
| kJ | 50 | 22 | 91 | 949 | 1106 | 10 | 9 | 7 | 225 | 627 | 949 | 759 | 705 | 10 | 10 | 8 | 2 | 70 | 74 | 82 | 112 |
Swell 3 Height (m) Direction Period (s) | — | — | WNW 11 | WNW 11 | WNW 11 | W 16 | — | SSW 24 | SSW 22 | WNW 8 | SSW 16 | WNW 11 | SW 19 | WNW 10 | NW 8 | — | — | WNW 8 | SW 18 | SW 24 | SSW 12 |
| kJ | — | — | 22 | 22 | 22 | 5 | — | 55 | 265 | 7 | 50 | 11 | 96 | 10 | 2 | — | — | 6 | 82 | 22 | 187 |
Wind waves Height (m) Direction Period (s) | WSW 10 | SW 10 | SSE 5 | SSE 5 | SSE 5 | SSE 5 | — | — | — | SSE 6 | SSE 6 | — | SSE 5 | SSE 7 | S 7 | S 7 | S 8 | — | — | — | — |
| kJ | 39 | 28 | 17 | 30 | 31 | 33 | — | — | — | 45 | 86 | — | 67 | 132 | 106 | 131 | 111 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 103 | 7 | 7 | 389 | 7 | 7 | 389 | 103 | 7 | 7 | 7 |
Best forecast wave conditions in Mentawi Islands | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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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 16 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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