Cement Factory surfForecast / Sumbawa / Indonesia

information circle12 Day Weather and Surf, issued 7 am Saturday 20 Dec 2025 WITA
Forecast update in hr  min  s Forecast update imminent
Cement Factory surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cement Factory sea temperature is
29.3° C
(Which is 1.0°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Cement Factory this week:

The surf forecast for Cement Factory over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Dec 20) at 11AM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 0.2m and 8s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Cement Factory in the next 12 days are 0.8m 18s and forecast to arrive on Saturday (Dec 27) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 16s period and expected on Thursday (Dec 25) at 5AM.

Wave TypeTime (WITA) & Date Wave Height & Period
Next good surf (1 star+)11AM (Sat 20th Dec)2.5ft (0.8m) 12s
Best Surf 2PM (Sun 21st Dec)2.5ft (0.8m) 10s
Most Powerful 2PM (Sat 27th Dec)2.5ft (0.8m) 18s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Heavy rain (total 25mm), heaviest during Sun night. Warm (max 28°C on Sat morning, min 27°C on Sat morning). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 24mm), heaviest during Thu afternoon. Warm (max 28°C on Tue morning, min 27°C on Tue morning). Wind will be generally light.

Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
1
1
1
2
1
0
0
0
0
1
1
0
0
0
0
0
0
1
0
1
Wave Height (m) & direction (?)
0.8
SSW
0.8
SSW
0.4
SW
0.8
SSW
0.8
SSW
0.8
SSW
0.4
SW
0.4
SSW
0.8
WSW
0.7
WSW
0.7
SSW
0.8
SSW
0.6
W
0.6
SW
0.9
SSW
0.5
W
0.5
WSW
0.1
SW
0.4
SW
0.4
SW
0.6
SSW
Period(s) (?)121117101010315661310614165522212018
Wave
Graph
(?)Metric surfscale
Energy kJ (?)16713870118125111286363315410724162013151811397216
Wind
(km/h)
5
E
10
NNE
5
ESE
5
SE
10
SE
5
ESE
10
ESE
5
NW
15
SSE
10
SE
5
SSE
10
NNE
10
NNE
10
N
5
ESE
5
SW
10
NNW
10
NNE
5
NE
15
NE
5
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glasscross-
off
glassglasscross-
off
glassoffcross-
on
cross-
off
cross-
off
glasscross-
off
cross-
off
crossglasscross-
on
crosscross-
off
glasscross-
off
glass
High Tide
/ height (m)
9:45PM
1.71
10:24PM
1.75
11:02PM
1.76
11:39PM
1.74
12:16AM
1.69
12:54AM
1.59
1:37AM
1.44
Low Tide
/ height (m)
6:39AM
0.12
7:18AM
0.12
7:55AM
0.15
8:31AM
0.19
9:03AM
0.26
9:32AM
0.35
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Sunrise6:20--6:22--6:22--6:22--6:22--6:24--6:24--
Sunset-5:59--5:59--5:59--6:00--6:00--6:00--6:01-
part cloud
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
rain showers
thunderstorm
clear
clear
part cloud
part cloud
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
Rain (mm)
--612121-32-----5512146
Temp. °C282828282828282828282828282828272827282828
Feels °C (?)323230333132323332313132313232323130333032
  • Map Icons:
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  • 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 Cement Factory Surf forecast

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