Snow-ForecastSnow-ForecastMountain-ForecastMountain-ForecastTide-ForecastTide-ForecastWeather-ForecastWeather-Forecast
Search by country, region, or break
Search by country, region, or break

Quick Links

Surf Forecasts:

4 Bobs surfForecast / Mentawi Islands / Indonesia

information circle48hr Weather and Surf, issued 6 am Saturday 31 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 10AM is: 1.0m 15s primary swell from a Southwest direction and 1.0m 11s secondary swell from a South direction (forecast issued at 06:00am January 31). The wind direction is predicted to be offshore and the swell rating is 2.

Time (WIB) & DateWave HeightWave Period
Morning (31 Jan)3.5ft (1.0m)15s
Afternoon (31 Jan)3.5ft (1.0m)15s
Evening (31 Jan)3.5ft (1.0m)14s

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
31
Sunday
01
Monday
02
Tue
03
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)
3
2
2
2
1
2
2
2
2
2
2
1
1
2
2
2
2
2
2
1
1
1
1
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1
SW
0.9
SW
1
SW
1
SW
0.9
SW
1
SW
0.9
SW
0.9
SW
0.9
SW
0.9
SW
0.9
SW
0.9
SW
0.9
SW
0.9
SW
0.9
SW
0.9
SW
0.9
SW
0.8
SW
0.8
SW
0.7
SW
0.7
SW
0.7
SW
0.7
SW
0.7
SW
Period(s) (?)151515151514141414141414131313131313131313131313
Wave
Graph
(?)Metric surfscale
Energy kJ (?)429360418418355412350346336327313268261257253253249205202170167167167167
Wind
(km/h)
15
NW
10
NW
5
NNW
10
WNW
10
W
15
WNW
10
WNW
10
WNW
10
NW
10
NW
5
WNW
5
W
10
W
15
W
10
WNW
10
WNW
10
NW
10
WNW
5
NW
5
NNW
5
N
0
NE
5
ESE
5
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		offcross-
off		crosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscrosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		glassglassglasscross-
on
High Tide
/ height (m)
5:08AM
0.66
5:25PM
1.23
6:01AM
0.76
6:14PM
1.29
6:46AM
0.85
6:58PM
1.31
Low Tide
/ height (m)
10:19AM
0.18
12:13AM
0.10
11:22AM
0.13
12:51AM
0.04
12:14PM
0.08
Saturday
31
Sunday
01
Monday
02
Tue
03
Sunrise-6:30-------6:30-------6:30------
Sunset----6:42-------6:42-------6:42---
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
thunderstorm
Rain (mm)
31-111-2321122153332---1
Temp. °C272727282828272726262728282827272727272728282827
Feels °C (?)303030303030303029293031303029303030303032323230
  • 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

Latest Updates

Save Up to 20% on SIXT Rental Cars Worldwide – Exclusive Surf-Forecast Deal
travel
Surf Forecast

Save Up to 20% on SIXT Rental Cars Worldwide – Exclusive Surf-Forecast Deal

Surf road trips just got even better. Surf-Forecast users can now save up to 20% on SIXT rental cars worldwide during the promotional period until March 31, 2026. Whether you’re planning a legendary California road trip, chasing waves along Europe’s coasts, or exploring remote surf destinations, this exclusive SIXT offer helps you travel smarter and cheaper. And if you want some inspiration on where to go, check out our article Five Iconic Surf Road Trips. Click and get your SIXT discount

The World’s Most Inconsistent Waves
Ben Mondy

The World’s Most Inconsistent Waves

Huntington, Dribbleton, Virginia, Holland and the Superbank! We recently had a look at the world’s most consistent waves. This was based on the combination of swells and wind directed at 7,000 surf spots, as compiled from our data since 2006. Those stats, represented in easy-to-read graphics, are located under each wave’s spot guides, with historical swell and wind breakdowns available by month, season, and year. There is also an offshore filter, which shows how often the swells come with clean

Read more

Read more

Discover more articles and updates in the Greenroom.

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

Nearest locationNearest
Nearest locationNearest
Nearest locationNearest