4 Bobs surfForecast / Mentawi Islands / Indonesia

information circle12 Day Weather and Surf, issued 6 am Friday 16 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
29.4° 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 Friday (Jan 16) at 10AM. The primary swell is predicted to be 1.0m and 13s period with a secondary swell of 0.6m and 6s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at 4 Bobs in the next 12 days are 1.8m 14s and forecast to arrive on Friday (Jan 23) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Jan 17) at 1PM.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+)10AM (Fri 16th Jan)3.5ft (1.0m) 13s
Best Surf 4PM (Wed 21st Jan)4ft (1.2m) 19s
Most Powerful 1AM (Fri 23rd Jan)6ft (1.8m) 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 Heavy rain (total 56mm), heaviest during Sat afternoon. Warm (max 29°C on Sun morning, min 26°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 52mm), heaviest during Mon afternoon. Warm (max 28°C on Mon morning, min 25°C on Mon afternoon). Wind will be generally light.

Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
2
2
1
1
2
3
2
3
2
3
2
2
2
1
2
3
4
3
4
3
4
Swell
Height Map
Wave Height (m) & direction (?)
1
SW
1
SW
0.8
SW
0.8
SW
1
SW
0.7
SW
1.1
SW
0.9
SSW
1.4
SW
1.3
SSW
1.3
SSW
1.3
SSW
1.2
SSW
1.2
SSW
1.1
SSW
0.9
SSW
1.2
S
1.4
SSW
1.6
SSW
1.5
SSW
1.8
SW
Period(s) (?)131313121620141717161615141414201918161514
Wave
Graph
(?)Metric surfscale
Energy kJ (?)34534024221748938848252812218228117205155304806871081123111959351321
Wind
(km/h)
15
NNW
15
NW
15
NW
25
NNW
20
W
15
NW
20
NW
10
NW
15
W
10
NW
25
WNW
15
WNW
20
WNW
25
WNW
20
WNW
15
NW
15
NW
15
WNW
15
NW
15
WNW
10
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
High Tide
/ height (m)
5:18PM
1.05
5:52AM
0.63
5:59PM
1.11
6:30AM
0.69
6:35PM
1.17
7:04AM
0.74
7:08PM
1.20
7:37AM
0.80
7:38PM
1.22
8:09AM
0.86
8:08PM
1.21
8:41AM
0.92
8:37PM
1.17
Low Tide
/ height (m)
12:06AM
0.22
10:48AM
0.23
12:33AM
0.16
11:34AM
0.18
1:02AM
0.11
12:16PM
0.15
1:30AM
0.08
12:56PM
0.13
1:59AM
0.05
1:35PM
0.13
2:29AM
0.04
2:16PM
0.14
2:59AM
0.04
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Sunrise6:24--6:26--6:26--6:26--6:26--6:26--6:26--
Sunset-6:37--6:38--6:38--6:38--6:38--6:39--6:39-
clear
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
Rain (mm)
-297121523621046414318332
Temp. °C282827282727292827282727282727262726272828
Feels °C (?)303029292829313029302728282628282828293032
  • 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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