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Surf Forecasts:

4 Bobs surfForecast / Mentawi Islands / Indonesia

information circle48hr Weather and Surf, issued 12 pm Thursday 18 Sep 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
29.4° C
 (Which is slightly warmer than usual)

How big are the waves at 4 Bobs today?

The current surf forecast for 4 Bobs at 5PM is: 1.6m 13s primary swell from a South-southwest direction and 0.3m 7s secondary swell from a West-northwest direction (forecast issued at 12:00pm September 18). The wind direction is predicted to be glassy and the swell rating is 3.

Time (WIB) & DateWave HeightWave Period
Morning (18 Sep)5.5ft (1.7m)14s
Afternoon (18 Sep)5ft (1.6m)13s
Evening (18 Sep)5ft (1.5m)13s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Thursday
18
Friday
19
Saturday
20
Sunday
21
10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM
Rating
(10 max)
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
3
4
4
4
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.7
SSW
1.6
SSW
1.6
SSW
1.6
SSW
1.4
S
1.5
S
1.4
S
0.9
SSW
1.3
S
1.4
S
1.4
S
0.8
SSW
0.9
SW
1.3
SSW
1.3
SSW
1.4
SSW
1.5
SSW
1.4
SW
1.4
SW
1.4
SW
1.4
SW
1.6
SSW
1.4
SW
1.4
SW
Period(s) (?)141313131313131512131318181617171817171616161616
Wave
Graph
(?)Metric surfscale
Energy kJ (?)10048368238236537476333874806636834134499079631133130912211165976104413051044906
Wind
(km/h)
10
SE
10
SE
5
ESE
0
SW
0
NNW
5
NNW
5
N
5
N
5
N
0
E
5
WNW
0
WNW
0
ENE
0
N
5
N
5
NNW
5
N
0
NE
0
NW
5
SW
5
S
5
SSE
0
SSW
0
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		glassglassglassglassoffoffglassglassglassglassglassglassoffoffoffglassglassglassonglassglassglass
High Tide
/ height (m)
4:31PM
0.72
4:38AM
1.05
5:15PM
0.85
5:22AM
1.09
5:51PM
0.96
5:59AM
1.11
Low Tide
/ height (m)
10:00PM
0.31
11:22AM
0.18
10:58PM
0.25
11:47AM
0.14
11:40PM
0.18
Thursday
18
Friday
19
Saturday
20
Sunday
21
Sunrise-------6:13-------6:13-------6:11
Sunset--6:20-------6:19-------6:19-----
clear
part cloud
clear
thunderstorm
thunderstorm
part cloud
thunderstorm
part cloud
part cloud
part cloud
part cloud
cloud
thunderstorm
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
Rain (mm)
---11-1-----1-----------
Temp. °C272828282727262627272727272727262727282828272727
Feels °C (?)303232333131292931313131313231293131323232313132
  • 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

Eyeball surf reportRecent Eyeball Surf Reports for Mentawi Islands

  1. weather stationWind Update Calm condsitions have become offshore at Kandui Left (light winds from the NE at Medan/Polonia Airport 608 km from Kandui Left). A 1.2m groundswell from the SSW

    1 hour 16 minutes ago Kandui Left
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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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