Cobblestones Surf Forecast

/ Sumbawa (17 surf breaks) /

Indonesia (168 surf breaks)

Surf Forecasts:

Cobblestones surfForecast / Sumbawa / Indonesia

12 Day Weather and Surf, issued 7 am Tuesday 14 Oct 2025 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 29.0° C
(Which is 1.0°C warmer than 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 Tuesday (Oct 14) at 11AM. The primary swell is predicted to be 0.9m and 24s period with a secondary swell of 0.9m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Cobblestones in the next 12 days are 2.5m 18s and forecast to arrive on Wednesday (Oct 15) 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 0.7m 5s period and expected on Friday (Oct 17) at 2AM.

Wave Type	Time (WITA) & Date	Wave Height & Period
Next good surf (1 star+)	11AM (Tue 14th Oct)	3ft (0.9m) 24s
Best Surf	2AM (Wed 15th Oct)	8ft (2.4m) 20s
Most Powerful	2PM (Wed 15th Oct)	8ft (2.5m) 18s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 2mm), mostly falling on Tue night. Warm (max 30°C on Tue morning, min 26°C on Tue night). Wind will be generally light.									Days 3-6 Weather Summary Moderate rain (total 18mm), heaviest on Sun night. Warm (max 31°C on Fri morning, min 27°C on Fri night). Wind will be generally light.
	Tuesday 14			Wednesday 15			Thursday 16			Friday 17			Saturday 18			Sunday 19			Monday 20
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	4	2	!	!	!	!	!	!	4	4	4	4	4	3	3	3	3	3	3	2	2
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW
Period(s) (?)	24	22	20	18	18	16	16	16	15	15	16	15	14	14	14	13	13	13	13	13	13
Wave Graph (?)
kJ (?)	808	2058	4153	4075	4384	3015	2954	2322	1542	1576	1845	1619	1289	1170	976	701	690	543	535	411	471
Wind (km/h)	SE	SSE	ESE	ESE	SSE	ESE	ESE	SSE	E	SE	SE	ESE	SE	SSE	ESE	SE	SE	NNE	SE	SE	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross	cross- off	cross- off	cross	cross- off	cross- off	cross	off	cross- off	cross- off	cross- off	cross- off	cross	cross- off	cross- off	cross- off	glass	cross- off	cross- off	off
High Tide / height (m)		3:01PM 1.76	2:49AM 2.25		5:44PM 1.69		5:14AM 2.00	7:45PM 1.93		7:26AM 2.08		8:29PM 2.21	8:29AM 2.25		8:59PM 2.45	9:11AM 2.40		9:25PM 2.66	9:45AM 2.52		9:49PM 2.82
Low Tide / height (m)	8:51AM 0.79		8:09PM 1.27	10:26AM 1.04		10:10PM 1.52	12:51PM 1.06		1:33AM 1.38		2:04PM 0.93	2:34AM 1.08		2:44PM 0.81	3:12AM 0.80		3:15PM 0.71	3:42AM 0.56		3:41PM 0.65	4:10AM 0.37

	Tuesday 14			Wednesday 15			Thursday 16			Friday 17			Saturday 18			Sunday 19			Monday 20
Sunrise	5:43	-	-	5:43	-	-	5:43	-	-	5:41	-	-	5:41	-	-	5:41	-	-	5:41	-	-
Sunset	-	6:00	-	-	6:00	-	-	6:00	-	-	6:00	-	-	6:00	-	-	6:00	-	-	6:00	-

Rain (mm)	-	-	2	-	-	-	-	-	-	-	1	1	-	-	-	-	6	10	-	2	1
Temp. °C	30	30	27	30	30	28	30	30	28	31	31	28	30	31	28	31	30	28	30	30	28
Feels °C (?)	32	32	30	32	32	32	32	31	32	34	34	32	32	32	32	34	33	32	33	34	33

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Sumbawa

Wind Update Offshore wind has become cross-off at Cobblestones (light winds from the ESE at Bali International Airport 353 km from Cobblestones). 1.0m 12s groundswell from the SSW with a 0.2m 16s long period groundswell from the SW and a 0.2m 25s long period groundswell, also from the SW. 3 swells combining to make bigger set waves.
1 hour 13 minutes ago Cobblestones

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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.

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.