Scar Reef Surf Forecast

/ Sumbawa (17 surf breaks) /

Indonesia (168 surf breaks) / Lat Long: (8.87° S 116.74° E)

Surf Forecasts:

Scar Reef surfForecast / Sumbawa / Indonesia

12 Day Weather and Surf, issued 7 am Saturday 18 Oct 2025 WITA

Forecast update in hr min s Forecast update imminent

Scar Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Scar Reef sea temperature is 29.0° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Scar Reef this week:

The surf forecast for Scar Reef over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Oct 18) at 11AM. The primary swell is predicted to be 1.6m and 14s period with a secondary swell of 0.6m and 5s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Scar Reef in the next 12 days are 1.8m 14s and forecast to arrive on Saturday (Oct 18) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Saturday (Oct 18) at 11AM.

Wave Type	Time (WITA) & Date	Wave Height & Period
Next good surf (1 star+)	11AM (Sat 18th Oct)	5ft (1.6m) 14s
Best Surf	11AM (Sat 18th Oct)	5ft (1.6m) 14s
Most Powerful	8PM (Sat 18th Oct)	6ft (1.8m) 14s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Moderate rain (total 10mm), heaviest on Mon afternoon. Warm (max 30°C on Sat afternoon, min 26°C on Sat night). Wind will be generally light.									Days 3-6 Weather Summary Heavy rain (total 27mm), heaviest during Tue afternoon. Warm (max 29°C on Tue morning, min 25°C on Tue night). Wind will be generally light.
	Saturday 18			Sunday 19			Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	3	3	2	1	2	2	1	2	2	2	2	2	1	2	2	2	2	2	2	2	2
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SW	SSW	SW	SW	SW	SW	SW	SW	SSW	SW	SW	SSW	SSW	SSW	SSW	SSW	SSW	SW	SW	SW
Period(s) (?)	14	14	13	13	13	13	13	14	13	12	12	12	12	13	12	12	11	11	17	16	16
Wave Graph (?)
kJ (?)	1079	1049	820	690	552	543	471	581	854	849	730	607	554	796	647	527	400	340	358	661	553
Wind (km/h)	S	ESE	E	SW	SSW	ENE	SW	S	ESE	SSW	E	E	SW	S	NE	S	S	E	SE	ESE	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	off	cross- off	cross	cross- off	glass	cross	glass	glass	cross- off	cross- off	glass	cross	glass	glass	glass	cross- off	cross- off	glass	off	cross- off
High Tide / height (m)	8:52AM 1.34		9:35PM 1.44	9:39AM 1.35		9:51PM 1.53	10:19AM 1.35		10:08PM 1.60	10:55AM 1.32		10:26PM 1.66	11:29AM 1.28		10:46PM 1.69	12:03PM 1.21		11:07PM 1.70	12:37PM 1.13		11:30PM 1.69
Low Tide / height (m)		3:15PM 0.47	3:47AM 0.56		3:39PM 0.52	4:18AM 0.42		4:01PM 0.57	4:47AM 0.30		4:21PM 0.63		5:17AM 0.21	4:41PM 0.68		5:47AM 0.16	4:59PM 0.73		6:18AM 0.15	5:15PM 0.77

	Saturday 18			Sunday 19			Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24
Sunrise	5:48	-	-	5:48	-	-	5:48	-	-	5:47	-	-	5:47	-	-	5:47	-	-	5:46	-	-
Sunset	-	6:07	-	-	6:07	-	-	6:07	-	-	6:07	-	-	6:07	-	-	6:07	-	-	6:07	-

Rain (mm)	-	1	1	-	2	-	-	4	2	-	8	3	-	2	5	-	5	4	-	-	1
Temp. °C	29	30	28	29	29	28	29	29	28	29	29	26	29	29	28	28	28	27	29	29	28
Feels °C (?)	32	33	32	33	33	33	32	33	33	33	33	30	33	33	33	32	31	32	33	32	31

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 Continuing clean conditions at Scar Reef (calm at DenpasarNgurahRai 173 km from Scar Reef). 1.5m 14s groundswell from the SSW with a 0.6m 5s windswell from the SE. 2 swells combining to make bigger set waves.
3 hours 15 minutes ago Scar Reef

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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 Scar Reef 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 Scar Reef Surf forecast

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

Scar Reef is 55 km (34 miles) from the city of Praya. If you plan a holiday in Sumbawa, look for hotels and other accommodation in Praya. Praya has rooms for a wide range of budgets as well as car hire and transport links.