4 Bobs surfForecast / Mentawi Islands / Indonesia

information circle12 Day Weather and Surf, issued 12 pm Monday 05 Jan 2026 WIB
Forecast 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
29.1° C
(Which is normal for this time of year)


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 Monday (Jan 05) at 7PM. The primary swell is predicted to be 1.7m and 10s period with a secondary swell of 0.6m and 13s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at 4 Bobs in the next 12 days are 1.2m 14s and forecast to arrive on Friday (Jan 09) at 7AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Jan 10) at 1PM.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Mon 5th Jan)5.5ft (1.7m) 10s
Best Surf 7PM (Mon 5th Jan)5.5ft (1.7m) 10s
Most Powerful 7AM (Fri 9th Jan)4ft (1.2m) 14s

Table - best surf conditions forecast for 4 Bobs over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 4mm), mostly falling on Wed night. Warm (max 29°C on Mon afternoon, min 26°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 49mm), heaviest during Fri night. Warm (max 28°C on Thu morning, min 24°C on Sat night). Wind will be generally light.

Monday
05
Tuesday
06
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
3
3
2
2
1
1
1
0
1
2
2
2
2
1
2
2
2
0
0
1
1
Swell
Height Map
Wave Height (m) & direction (?)
1.7
WSW
1.8
WSW
1.4
WSW
1.3
WSW
0.7
SSW
1
W
0.9
WSW
0.7
SSW
0.7
SSW
0.6
SSW
0.8
SSW
1
SSW
1.2
SSW
1
SSW
1
SSW
0.8
SSW
0.9
SSW
0.8
SSW
0.8
SSW
0.7
SSW
0.5
SSW
Period(s) (?)10109812881211151514131312131212121111
Wave
Graph
(?)Metric surfscale
Energy kJ (?)61064030821613714010711910714824638450635131418623016415011570
Wind
(km/h)
15
NNW
10
NW
10
NW
10
NNW
5
WSW
10
NW
5
N
5
W
10
WNW
5
NW
5
WNW
0
WNW
10
WNW
15
W
10
WNW
10
NNE
15
NNW
20
NW
20
NNW
15
N
10
NNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
offcrosscross-
off
offcrosscross-
off
glasscross-
off
glasscross-
off
crosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
High Tide
/ height (m)
7:51PM
1.34
8:25AM
0.87
8:34PM
1.28
9:10AM
0.90
9:15PM
1.18
9:56AM
0.92
9:54PM
1.06
10:44AM
0.93
10:33PM
0.93
11:34AM
0.92
11:15PM
0.80
12:30PM
0.91
12:06AM
0.69
Low Tide
/ height (m)
1:03PM
0.05
2:20AM
0.00
1:50PM
0.08
2:57AM
0.03
2:36PM
0.14
3:31AM
0.07
3:22PM
0.22
4:04AM
0.12
4:10PM
0.31
4:36AM
0.17
5:02PM
0.38
5:10AM
0.22
6:03PM
0.44
Monday
05
Tuesday
06
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
Sunrise6:20--6:20--6:20--6:22--6:22--6:22--6:22--
Sunset-6:34--6:35--6:35--6:35--6:36--6:36--6:37-
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
mod rain
thunderstorm
thunderstorm
rain showers
Rain (mm)
--------43265512367332
Temp. °C282927282828282827282828272727262625262626
Feels °C (?)313230323131323130323133302930282826282829
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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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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