4 Bobs surfForecast / Mentawi Islands / Indonesia

information circle12 Day Weather and Surf, issued 6 pm Thursday 01 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 Saturday (Jan 03) at 1PM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.6m and 10s. 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 3.0m 9s and forecast to arrive on Friday (Jan 02) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Jan 03) at 10AM.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Sat 3rd Jan)4ft (1.2m) 8s
Best Surf 4AM (Mon 5th Jan)5ft (1.6m) 12s
Most Powerful 7PM (Fri 2nd Jan)10ft (3.0m) 9s

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 91mm), heaviest during Fri morning. Warm (max 28°C on Thu afternoon, min 24°C on Fri morning). Winds decreasing (strong winds from the W on Fri afternoon, calm by Sun morning).

Days 3-6 Weather Summary Moderate rain (total 12mm), heaviest on Mon afternoon. Warm (max 28°C on Sun afternoon, min 26°C on Sun night). Wind will be generally light.

Thu
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
1
0
0
0
2
0
1
1
2
2
2
2
2
3
2
2
2
2
1
2
2
Swell
Height Map
Wave Height (m) & direction (?)
1
S
1
S
1.7
W
3
W
2.4
W
0.9
WSW
0.5
S
0.6
S
1.3
WSW
1.4
WSW
1.5
WSW
1.7
WSW
1.6
WSW
1.8
WSW
1.5
WSW
1.4
WSW
1.2
WSW
1.2
W
1.1
W
1
W
0.6
SSW
Period(s) (?)10106888181699911101199988815
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1962252251264790120167195254294360643502771367287222210169131148
Wind
(km/h)
20
WNW
20
W
30
W
40
W
30
WNW
30
NNW
25
NNW
20
NW
10
NNW
5
NW
15
WNW
15
NNW
15
NNW
15
NW
15
NNW
10
NW
10
WNW
10
NNW
5
W
15
WNW
10
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
crosscrosscrosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
cross-
off
cross-
off
crosscross-
off
cross-
off
High Tide
/ height (m)
4:34PM
1.23
5:07AM
0.69
5:28PM
1.31
6:02AM
0.73
6:18PM
1.35
6:52AM
0.78
7:06PM
1.37
7:39AM
0.83
7:51PM
1.34
8:25AM
0.87
8:34PM
1.28
9:10AM
0.90
9:15PM
1.18
9:56AM
0.92
Low Tide
/ height (m)
11:20PM
0.13
10:23AM
0.11
12:13AM
0.06
11:20AM
0.07
12:59AM
0.01
12:13PM
0.04
1:41AM
-0.01
1:03PM
0.05
2:20AM
0.00
1:50PM
0.08
2:57AM
0.03
2:36PM
0.14
3:31AM
0.07
Thu
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
Sunrise--6:18--6:18--6:20--6:20--6:20--6:20--6:22
Sunset6:31--6:32--6:32--6:34--6:34--6:35--6:35--
thunderstorm
thunderstorm
thunderstorm
heavy rain
light rain
light rain
light rain
rain showers
part cloud
part cloud
rain showers
rain showers
thunderstorm
part cloud
part cloud
thunderstorm
rain showers
part cloud
part cloud
thunderstorm
clear
Rain (mm)
71452132111--412--32--6-
Temp. °C282725252625262628282727282728282728282728
Feels °C (?)292824212325252732312928292931312931312930
  • 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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