Marosi Surf Forecast

/ Sumba (6 surf breaks) /

Indonesia (168 surf breaks)

Surf Forecasts:

Marosi surfForecast / Sumba / Indonesia

12 Day Weather and Surf, issued 7 am Sunday 14 Sep 2025 WITA

Forecast update in hr min s Forecast update imminent

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

Today's Marosi sea temperature is 27.0° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Marosi this week:

The surf forecast for Marosi over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 15) at 2AM. The primary swell is predicted to be 1.5m and 14s period with a secondary swell of 0.9m and 6s. Another secondary swell of 1.4m and 6s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Marosi in the next 12 days are 2.5m 15s and forecast to arrive on Wednesday (Sep 17) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Sunday (Sep 14) at 11PM.

Wave Type	Time (WITA) & Date	Wave Height & Period
Next good surf (1 star+)	2AM (Mon 15th Sep)	5ft (1.5m) 14s
Best Surf	2AM (Mon 15th Sep)	5ft (1.5m) 14s
Most Powerful	8AM (Wed 17th Sep)	8ft (2.5m) 15s

Table - best surf conditions forecast for Marosi 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 Sun afternoon. Warm (max 27°C on Sun afternoon, min 24°C on Sun night). Wind will be generally light.									Days 3-6 Weather Summary Mostly dry. Warm (max 27°C on Wed afternoon, min 24°C on Thu night). Wind will be generally light.
	Sunday 14			Monday 15			Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Saturday 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)	1	2	4	0	0	2	0	0	2	0	1	3	2	2	4	0	1	2	2	1	3
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SSW	SSW	SSW	SSW	SW	SW	SW	SW	SW	SW	SSW
Period(s) (?)	15	14	14	14	14	14	14	14	16	15	15	14	14	14	13	12	15	16	16	17	17
Wave Graph (?)
kJ (?)	1138	1006	886	726	736	686	725	715	2444	2962	2510	2243	1644	1272	996	667	325	424	993	1024	2204
Wind (km/h)	SSE	SE	E	SE	SE	SE	SE	SE	SE	SSE	SE	SE	S	SSE	E	SSE	SE	ESE	S	SE	ESE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross	cross- off	cross- on	cross- on	cross	cross- on	cross- on	cross	cross- on	cross- on	cross	cross- on	cross- on	cross- off	cross- on	cross	cross	cross- on	cross- on	cross
High Tide / height (m)		2:16PM 1.92	2:18AM 2.60		3:13PM 1.63	3:14AM 2.30		6:02PM 1.46		5:20AM 2.06		8:45PM 1.69	7:40AM 2.13		9:20PM 1.98	8:50AM 2.32		9:47PM 2.24	9:35AM 2.49		10:11PM 2.47
Low Tide / height (m)	8:22AM 0.45	7:47PM 0.85		9:19AM 0.73		8:19PM 1.11	11:01AM 0.97		9:12PM 1.39	1:47PM 0.91		1:33AM 1.43		2:52PM 0.72	2:54AM 1.15		3:30PM 0.55	3:37AM 0.86		3:59PM 0.43	4:10AM 0.62

	Sunday 14			Monday 15			Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Saturday 20
Sunrise	5:58	-	-	5:56	-	-	5:56	-	-	5:56	-	-	5:54	-	-	5:54	-	-	5:54	-	-
Sunset	-	6:00	-	-	5:59	-	-	5:59	-	-	5:59	-	-	5:59	-	-	5:59	-	-	5:59	-

Rain (mm)	-	1	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	26	27	27	26	27	26	26	27	26	26	27	26	26	27	26	26	27	26	26	27	26
Feels °C (?)	29	28	27	26	26	26	26	27	27	28	28	27	27	29	27	27	27	27	27	29	28

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 Sumba

Wind Update Previously calm conditions have become cross-shore at Marosi (light winds from the ESE at WaingapuMauHau 123 km from Marosi). 1.3m 15s groundswell from the SW with a 1.2m 6s windswell from the SE and a 0.8m 6s windswell from the SSE. 3 swells combining so expect closeout sets.
55 minutes ago Marosi

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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 Marosi 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 Marosi Surf forecast

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

Are you planning a holiday in Sumba? If you are looking for accommodation near Marosi, camping, hotels and holiday cottages in Sumba, consider staying in Adalara which is 29 km (18 miles) away.