4 Bobs surfForecast / Mentawi Islands / Indonesia

information circle12 Day Weather and Surf, issued 6 pm Friday 19 Dec 2025 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 (Dec 20) at 4AM. The primary swell is predicted to be 1.0m and 12s period with a secondary swell of 0.5m and 5s. 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 1.2m 18s and forecast to arrive on Friday (Dec 26) 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 0.5m 6s period and expected on Saturday (Dec 20) at 1PM.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Sat 20th Dec)3.5ft (1.0m) 12s
Best Surf10AM (Fri 26th Dec)2.5ft (0.7m) 19s
Most Powerful 7PM (Fri 26th Dec)4ft (1.2m) 18s

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 5mm), mostly falling on Fri afternoon. Warm (max 28°C on Fri afternoon, min 26°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 25mm), heaviest during Wed afternoon. Warm (max 28°C on Mon afternoon, min 26°C on Mon night). Wind will be generally light.

Fri
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
2
2
2
2
2
2
1
2
2
2
2
2
2
2
2
0
0
2
1
2
3
Swell
Height Map
Wave Height (m) & direction (?)
1
SW
0.8
SSW
0.9
SSW
1.1
SW
0.6
SW
0.6
SSW
0.7
SW
0.7
SW
0.9
SW
0.7
SW
0.9
SW
0.8
SW
0.8
SW
0.8
SW
0.9
SSE
0.9
SW
0.6
S
0.6
S
0.9
SW
0.9
SW
0.7
SW
Period(s) (?)131211111615151515141413131311141816141419
Wave
Graph
(?)Metric surfscale
Energy kJ (?)326187227293206152217223309211280215208205187264225188297297376
Wind
(km/h)
10
WNW
10
NW
10
NW
10
WNW
10
NW
10
NNW
10
WSW
15
WNW
10
N
15
NW
15
WNW
10
NNW
10
WNW
10
WNW
10
NW
20
W
20
W
15
NNW
20
W
20
WNW
15
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
on
cross-
off
offcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crosscrossoffcross-
off
cross-
off
cross-
off
High Tide
/ height (m)
6:09PM
1.14
6:38AM
0.69
6:45PM
1.17
7:14AM
0.70
7:19PM
1.18
7:48AM
0.72
7:51PM
1.18
8:22AM
0.73
8:22PM
1.16
8:57AM
0.76
8:53PM
1.13
9:36AM
0.78
9:25PM
1.08
10:21AM
0.82
Low Tide
/ height (m)
12:39AM
0.13
11:46AM
0.15
1:11AM
0.11
12:24PM
0.13
1:45AM
0.09
1:02PM
0.14
2:18AM
0.09
1:41PM
0.16
2:52AM
0.10
2:21PM
0.20
3:27AM
0.11
3:04PM
0.25
4:04AM
0.13
Fri
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Sunrise--6:11--6:13--6:13--6:13--6:13--6:15--6:15
Sunset6:25--6:25--6:27--6:27--6:28--6:28--6:29--
thunderstorm
rain showers
clear
part cloud
rain showers
thunderstorm
part cloud
part cloud
part cloud
part cloud
rain showers
thunderstorm
part cloud
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
Rain (mm)
21--11----13-419252167
Temp. °C282728282728282728282728282728282627282627
Feels °C (?)313032313033312930303031312931282629292529
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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