Surf Forecasts:
Scar Reef surf forecast from 30 Aug 2026:
- Best quality surf: Monday 31 Aug, 8PM (local time) - 5.5ft (1.7m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 2PM (local time) - 7.5ft (2.3m), 17s period, SSW swell with 3,212 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 8PM (local time) - 4.5ft (1.3m), 13s period with SSW swell.
Best Forecast Surf Conditions for Scar Reef this week:
The surf forecast for Scar Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 30) at 8PM. The primary swell is predicted to be 1.3m and 13s period with a secondary swell of 0.6m and 21s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Scar Reef in the next 16 days are 2.3m 17s and forecast to arrive on Sunday (Sep 06) 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 6s period and expected on Tuesday (Sep 01) at 11AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 30th Aug) | 4.5ft (1.3m) 13s |
| Best Surf | 8PM (Mon 31st Aug) | 5.5ft (1.7m) 18s |
| Most Powerful | 2PM (Sun 6th Sep) | 7.5ft (2.3m) 17s |
Table - best surf conditions forecast for Scar Reef over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get into it for Scar Reef. We've got a solid run of surf on the way, so paddle hard and get amongst it.
We start with a bit of a slow one on Sunday the 30th of August. The swell is a modest 5ft from the SW, but the period is a juicy 13 seconds, so there’s some energy in the water (combined energy 949). The headline here is the glassy conditions with a light SE wind. The water’s sitting at a pleasant 80°, which is about average for this time of year, so no surprises there. Monday the 31st picks up nicely. The morning sees a 4ft SW swell with a very long 18-second period, and by the afternoon it’s 5ft SW with the same long interval, making for some proper groundswell lines. Winds are light and clean all day. This is a reef and point setup, so that long-period SW groundswell will wrap in beautifully.
Now, the standout window begins on Tuesday the 1st of September. The morning delivers a clean 7ft SW swell with that 18-second period, and the afternoon holds steady at 7ft SW with a 17-second period. Light offshore or cross-off winds keep things tidy. This is excellent for experienced surfers. The combined energy jumps to 2641, showing there’s some real power behind it. Wednesday the 2nd keeps the quality high with 7ft to 7ft SW swells and light winds.
The best of the best, though, has to be Tuesday the 8th and Wednesday the 9th of September. On the 8th, we see a 6ft SSW swell with an incredibly long 19-second period in the morning, building to 7ft SSW (18-second period) by the afternoon. The combined energy is massive at 3424 and 4332 respectively. Then on Wednesday the 9th, we get a 8ft SSW swell with a 16-second period, pushing the energy up to a whopping 4575 in the morning and 5331 in the afternoon. The wind stays light and cross-off. These are expert-level waves, and the long periods mean the sets will be powerful and lined up, tracking beautifully down the reef. Not a beginner's day, but for the experienced crew, this is as good as it gets.
Thursday the 10th holds the 8ft mark from the SSW with lighter winds, and Friday the 11th stays excellent with 8ft SW swells and gentle offshore breezes. The run continues strong through Saturday the 12th with 7ft to 7ft SW and light offshores. After that, things ease back a touch on Sunday the 13th and Monday the 14th with 5ft to 6ft SW swells, but still clean and surfable with glassy conditions on Sunday afternoon.
So, the clear standout is that window from the 8th to the 11th of September. Scar Reef will be firing, but it will be big, powerful, and for experts only. Crowds are noted as possible here, and with quality like that, you’d expect company. Get in there.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 22°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Wed afternoon, min 22°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SW 13 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SSW 14 | SW 14 | SSW 16 | SSW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 623 | 730 | 989 | 1501 | 2150 | 2611 | 2352 | 2592 | 2275 | 2053 | 1532 | 1297 | 1041 | 746 | 658 | 731 | 460 | 743 | 1851 | 1427 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-off | off | off | cross-off | off | off | cross-off | off | cross-off | cross-off | off | off | cross-off | off | cross-off | cross-off | cross-off | off |
High Tide | 00:19AM1.52m | 12:26PM1.43m | 00:41AM1.59m | 1:06PM1.29m | 1:06AM1.63m | 1:50PM1.11m | 1:36AM1.65m | 2:48PM0.93m | 2:12AM1.63m | 4:58PM0.79m | 3:02AM1.57m | 4:30AM1.52m | ||||||||
Low Tide | 6:07PM0.37m | 6:27AM0.46m | 6:25PM0.46m | 7:08AM0.41m | 6:41PM0.55m | 7:54AM0.39m | 6:56PM0.64m | 8:50AM0.41m | 7:05PM0.72m | 10:09AM0.44m | 6:38PM0.78m | 12:17PM0.42m | ||||||||
 |  | | | | | | | | | | | | | | | | | | | |
 | — | — | 6:15 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:09 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 25 | 27 | 28 | 25 | 27 | 28 | 25 | 27 | 29 | 24 | 27 | 28 | 24 | 26 | 28 | 24 | 26 | 27 | 25 |
Feels °C | 29 | 29 | 29 | 30 | 27 | 28 | 29 | 27 | 28 | 29 | 25 | 28 | 28 | 25 | 27 | 27 | 25 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SSW 12 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SSW 14 | SW 14 | SSW 16 | SSW 14 |
| kJ | 623 | 410 | 989 | 1501 | 2150 | 2611 | 2352 | 2592 | 2275 | 2053 | 1532 | 1297 | 1041 | 746 | 658 | 731 | 460 | 743 | 1851 | 1427 |
Swell 2 Height (m) Direction Period (s) | SE 6 | SW 19 | SW 12 | SSW 12 | SSW 11 | SE 6 | — | SE 5 | SE 6 | — | — | SE 6 | — | — | SSW 6 | — | SW 13 | SSW 16 | — | SSW 18 |
| kJ | 24 | 730 | 330 | 243 | 103 | 30 | — | 22 | 29 | — | — | 34 | — | — | 3 | — | 269 | 427 | — | 123 |
Swell 3 Height (m) Direction Period (s) | SSW 21 | SE 5 | SE 5 | SW 12 | — | — | — | — | — | — | — | — | — | — | — | — | SSW 6 | — | — | — |
| kJ | 302 | 17 | 20 | 51 | — | — | — | — | — | — | — | — | — | — | — | — | 11 | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 6 | ESE 5 | ESE 5 | SE 6 | SE 6 | ESE 6 | SE 6 | SE 5 | SE 6 | SE 5 | SE 5 | ESE 6 | SE 5 | SE 5 | SE 5 | SE 5 | SE 4 | SE 5 | ESE 5 | SSE 4 |
| kJ | 65 | 45 | 45 | 44 | 36 | 115 | 50 | 64 | 85 | 47 | 24 | 93 | 49 | 23 | 30 | 53 | 13 | 24 | 34 | 10 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Sumbawa | ||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||
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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 16 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.
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