Surf Forecasts:
Scar Reef surf forecast from 15 Aug 2026:
- Best quality surf: Saturday 15 Aug, 11PM (local time) - 7ft (2.2m), 16s period, SSW swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 2AM (local time) - 10ft (3.0m), 17s period, SW swell with 4,484 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 11PM (local time) - 7ft (2.2m), 16s 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 Saturday (Aug 15) at 11PM. The primary swell is predicted to be 2.2m and 16s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Scar Reef in the next 16 days are 3.0m 17s and forecast to arrive on Thursday (Aug 20) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 7s period and expected on Friday (Aug 21) at 5AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sat 15th Aug) | 7ft (2.2m) 16s |
| Best Surf | 11PM (Sat 15th Aug) | 7ft (2.2m) 16s |
| Most Powerful | 2AM (Thu 20th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Scar Reef over the next 16 days.
The Lowdown
Alright, this is Rusty. Let’s get into it for Scar Reef. We’ve got solid, consistent swell on the cards right through the 16-day window, so no quiet start. The next two and a half weeks are packed. This is a reef and point setup, so keep that in mind with what’s coming.
First up, the water temp is sitting at about 80°, which is pretty much normal for this time of year – no weird anomalies to worry about.
It all kicks off from Saturday afternoon, the 15th of August. We’re looking at a nice 7 ft SSW swell packing some serious grunt – combined energy is a strong 2758 – with a clean light breeze from the southeast. This is excellent for experienced surfers. The period is a very long 17 seconds. That’s classic groundswell, so expect beautiful, well-shaped lines at this reef… though it could be a bit straight for some spots.
Sunday the 16th is a real standout. The morning has a 7 ft SSW swell with a light cross-off, but the afternoon is the gem. It drops to 6 ft from the same direction, but the wind goes completely glassy. Expect very clean, very good surf conditions. The energy is still substantial at 1757.
Monday the 17th eases down a touch, with 5 ft in the morning under glassy conditions – those clean, smaller morning waves will be a treat for anyone who can handle the reef.
We get a nice pulse again on Tuesday the 18th afternoon, with the swell coming up to 5 ft from the SW, energy jumping to 2431. That’s a solid bump in power.
But the real highlight of the first week? Wednesday the 19th. Morning sees 8 ft SSW with a 18-second period, energy at 3615. Then the afternoon goes glassy again, with 8 ft SW and energy hitting 4027. This is a lot of swell with near-perfect conditions. At 8 ft, this is for experts only. The period is 18 seconds, so that long groundswell will set up beautifully on the point.
Thursday the 20th is also massive, with 10 ft SW in the morning (energy 4061) and clean winds, but again, this is big – only for those with serious experience.
Friday the 21st is back to a more manageable 7–7 ft, and Saturday the 22nd holds similar size. The consistency all week is fantastic.
After that, the swell settles a little through the end of the first week and into the second, but it never goes flat. Sunday the 23rd is around 6 ft, and the following week stays in the 3 ft to 6 ft range with mostly clean conditions. Another standout window to watch is Wednesday the 27th – a fat 20-second period swell rolls in at 3 ft SW in the morning, then jumps to 5 ft SW with a 19-second period in the afternoon, energy of 2357. That’s a very long-period groundswell for the end of August, and with light offshore winds, it’s going to peel perfectly at Scar Reef.
Then on Friday the 28th of August, we get another solid return from the southwest at 8 ft, energy 3050, with clean conditions. The afternoon goes glassy again. That’s a potential top day towards the end of the run.
And even further out, Sunday the 30th of August serves up a 6 ft SW swell with a 20-second period in the morning, and a bigger 7 ft SW in the afternoon with a gentle offshore breeze. The energy tops 3263. It’s a long-range call, but it looks promising.
Overall, Scar Reef is the absolute standout here. With its reef and point nature and a consistent SW to SSW swell, it’s going to fire on numerous days. Crowds are listed as ‘sometimes’, so expect company on the best days, but the quality on offer will be worth it.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Wed morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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) | SSW 16 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SW 13 | SSW 16 | SW 16 | SW 16 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 17 | SSW 16 |
Wave Graph | |||||||||||||||||||
2358 | 2080 | 1743 | 1191 | 947 | 763 | 525 | 897 | 1239 | 1532 | 3539 | 3796 | 4484 | 3850 | 3334 | 2513 | 1547 | 3146 | 2964 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | glassy | cross-off | glassy | glassy | cross-off | glassy | glassy | cross-off | cross-off | glassy | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 00:57AM1.49m | 12:49PM1.47m | 1:23AM1.54m | 1:30PM1.29m | 1:49AM1.55m | 2:11PM1.10m | 2:16AM1.53m | 2:59PM0.93m | 2:47AM1.49m | 4:40PM0.79m | 3:27AM1.42m | 4:34AM1.36m | |||||||
Low Tide | 6:51AM0.52m | 7:01PM0.40m | 7:38AM0.50m | 7:20PM0.52m | 8:28AM0.52m | 7:34PM0.63m | 9:24AM0.56m | 7:38PM0.72m | 10:42AM0.59m | 7:02PM0.77m | 12:57PM0.57m | ||||||||
— | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
6:12 | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 26 | 26 | 26 | 27 | 25 | 26 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 24 |
Feels °C | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 29 | 28 | 28 | 29 | 29 | 28 | 29 | 28 | 27 | 28 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SW 13 | SSW 16 | SW 16 | SW 16 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 17 | SSW 16 |
2358 | 2080 | 1743 | 1191 | 947 | 763 | 525 | 897 | 1239 | 1532 | 3539 | 3796 | 4484 | 3850 | 3334 | 2513 | 1547 | 3146 | 2964 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SE 5 | SSE 6 | SE 6 | SSW 18 | SW 13 | SW 20 | SW 19 | SE 6 | SE 6 | — | SE 7 | SE 6 | SE 6 | SSW 18 | — | — |
— | — | — | 12 | 20 | 36 | 408 | 406 | 1157 | 1088 | 25 | 30 | — | 48 | 54 | 62 | 874 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SW 25 | SSW 20 | SW 23 | SW 21 | SE 6 | SE 5 | — | — | — | — | — | — | — | — | — |
— | — | — | — | 25 | 38 | 266 | 658 | 39 | 17 | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 5 | SE 5 | SE 5 | ESE 5 | SE 6 | SE 6 | SE 5 | ESE 5 | ESE 6 | ESE 5 | ESE 6 | ESE 6 | SE 6 | ESE 7 | SE 6 | SE 6 | SE 7 | SE 5 | SE 6 |
28 | 31 | 14 | 44 | 61 | 72 | 12 | 45 | 100 | 49 | 85 | 77 | 44 | 159 | 164 | 162 | 73 | 94 | 56 | |
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 |
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.











