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Surf Forecasts:

Cobblestones surfForecast / Sumbawa / Indonesia

information circle12 Day Weather and Surf, issued 1 pm Tuesday 13 Jan 2026 WITA
Forecast update in hr  min  s Forecast update imminent
Cobblestones surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cobblestones sea temperature is
29.5° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Cobblestones this week:

The surf forecast for Cobblestones over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jan 18) at 8AM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.7m and 16s. Another secondary swell of 1.4m and 8s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Cobblestones in the next 12 days are 1.7m 14s and forecast to arrive on Tuesday (Jan 20) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Wednesday (Jan 14) at 8PM.

Wave TypeTime (WITA) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Sun 18th Jan)3.5ft (1.1m) 13s
Best Surf 8AM (Mon 19th Jan)4ft (1.2m) 14s
Most Powerful 8PM (Tue 20th Jan)5.5ft (1.7m) 14s

Table - best surf conditions forecast for Cobblestones over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Heavy rain (total 50mm), heaviest during Tue night. Warm (max 29°C on Wed afternoon, min 26°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 24mm), heaviest during Sun night. Warm (max 30°C on Sat morning, min 25°C on Sun night). Wind will be generally light.

Tue
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
1
0
1
0
0
0
1
3
1
2
3
1
2
3
2
2
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.8
SSW
0.8
SSW
0.4
SW
0.6
SSW
0.7
SW
0.9
SW
0.8
SW
0.8
SW
1
SW
1
SW
1.1
SW
1.1
SW
1.1
SW
0.9
SW
1.3
SW
1.3
SW
1.4
SW
1.2
SW
1.5
SW
1.4
SW
1.5
SW
Period(s) (?)101018171615161614141414141416161414151514
Wave
Graph
(?)Metric surfscale
Energy kJ (?)130125102190248365295299371404459459459304793773752606953942840
Wind
(km/h)
25
NW
25
NW
25
NW
20
WNW
15
NW
15
WNW
15
W
20
NW
25
WNW
15
WNW
10
WNW
10
W
15
W
10
NW
5
W
20
WNW
15
WNW
5
WNW
15
W
15
NW
20
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		oncross-
on		oncross-
on		cross-
on		cross-
on		oncross-
on		cross-
on
High Tide
/ height (m)
5:21PM
2.21
7:26AM
1.56
6:48PM
2.19
9:07AM
1.68
8:05PM
2.28
9:53AM
1.84
9:00PM
2.43
10:25AM
2.00
9:43PM
2.59
10:54AM
2.16
10:20PM
2.74
11:21AM
2.31
10:54PM
2.86
11:47AM
2.44
Low Tide
/ height (m)
1:07AM
1.12
11:19AM
1.43
2:37AM
0.96
1:29PM
1.45
3:27AM
0.76
2:48PM
1.34
4:04AM
0.58
3:37PM
1.20
4:35AM
0.41
4:15PM
1.05
5:04AM
0.28
4:50PM
0.91
5:32AM
0.19
Tue
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Sunrise--5:56--5:58--5:58--5:58--5:58--6:00--6:00
Sunset6:31--6:32--6:32--6:32--6:32--6:32--6:32--
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
rain showers
part cloud
thunderstorm
thunderstorm
thunderstorm
Rain (mm)
3193583621--123-612-331
Temp. °C282628292628292729282730302729292628292728
Feels °C (?)282828292730312929292933323032312932323028
  • 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Cobblestones 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 Cobblestones at:
surf-forecast.com

Information about the Cobblestones Surf forecast

The above surf forecast table for Cobblestones provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Cobblestones can be found by selecting the local surf guide option on the grey menu. Our Cobblestones 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 (Cobblestones) 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 Cobblestones 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.

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