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Surf Forecasts:

4 Bobs surfForecast / Mentawi Islands / Indonesia

information circle48hr Weather and Surf, issued 6 am Saturday 17 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
29.3° C
 (Which is normal for this time of year)

How big are the waves at 4 Bobs today?

The current surf forecast for 4 Bobs at 9AM is: 0.8m 12s primary swell from a Southwest direction and 0.8m 6s secondary swell from a West-southwest direction (forecast issued at 06:00am January 17). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (WIB) & DateWave HeightWave Period
Morning (17 Jan)2.5ft (0.8m)12s
Afternoon (17 Jan)3.5ft (1.0m)16s
Evening (17 Jan)3.5ft (1.0m)16s

Table - waves today at 4 Bobs. (Swell directed towards the surf break)

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Saturday
17
Sunday
18
Monday
19
Tue
20
4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM
Rating
(10 max)
1
2
2
1
1
1
1
2
2
2
2
3
3
3
3
4
1
3
2
2
3
2
2
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.7
SW
0.9
SW
0.8
SW
0.9
SW
1
SW
1
SW
1
SW
1
SW
0.9
SW
0.8
SSW
1.1
SW
0.8
SSW
0.9
SSW
1.4
SW
1.5
SSW
1.4
SW
1.4
SSW
1.3
SSW
1.3
SSW
1.3
SSW
1.3
SSW
1.3
SSW
1.3
SSW
1.3
SSW
Period(s) (?)171312161616151519191418171817171616161616161515
Wave
Graph
(?)Metric surfscale
Energy kJ (?)291273217371489477465435546465482407528124913831221993832822811811801791730
Wind
(km/h)
20
NNW
20
NNW
25
NNW
20
NNW
20
NW
25
WNW
20
WNW
20
NW
20
NW
20
NW
20
NW
10
NW
10
NNW
5
W
10
W
10
W
15
W
15
W
15
WNW
20
WNW
15
NW
15
WNW
15
WNW
20
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		offoffcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscrosscross-
off		crosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off
High Tide
/ height (m)
5:52AM
0.63
5:59PM
1.11
6:30AM
0.69
6:35PM
1.17
7:04AM
0.74
7:08PM
1.20
Low Tide
/ height (m)
10:48AM
0.23
12:33AM
0.16
11:34AM
0.18
1:02AM
0.11
12:16PM
0.15
Saturday
17
Sunday
18
Monday
19
Tue
20
Sunrise-6:26-------6:26-------6:26------
Sunset----6:38-------6:38-------6:38---
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
cloud
cloud
cloud
cloud
cloud
part cloud
cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
Rain (mm)
32252-------121232134311
Temp. °C262627282828282727272829292827262626272627272727
Feels °C (?)272727292929302828282830313130282728292729292929
  • 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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FREE! Surf-Forecast.com widget for your website

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.

View detailed surf forecast for 4 Bobs at:
surf-forecast.com

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