Surf Forecasts:
Scar Reef surf forecast from 12 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 11PM (local time) - 6.5ft (2.0m), 16s period, SSW swell with offshore winds.
- Most powerful swell: Wednesday 19 Aug, 8PM (local time) - 8ft (2.5m), 18s period, SW swell with 4,185 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 11PM (local time) - 6.5ft (2.0m), 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 Wednesday (Aug 12) at 11PM. The primary swell is predicted to be 2.0m and 16s period with a secondary swell of 0.9m and 19s. 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 2.5m 18s and forecast to arrive on Wednesday (Aug 19) at 8PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Thursday (Aug 13) at 11AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 12th Aug) | 6.5ft (2.0m) 16s |
| Best Surf | 11PM (Wed 12th Aug) | 6.5ft (2.0m) 16s |
| Most Powerful | 8PM (Wed 19th Aug) | 8ft (2.5m) 18s |
Table - best surf conditions forecast for Scar Reef over the next 16 days.
The Lowdown
Alright, Rusty here, let's talk about what's shaping up for our waters.
We've got a solid run of surf coming in at Scar Reef, a reef and point setup that’s for the advanced crew only. The window opens Wednesday afternoon, and from there it’s pretty much game on for a good stretch. This spot is fairly consistent and likes a south-west swell, and that's exactly what we're getting.
The water is sitting at 80°, which is about what you'd expect this time of year, no weirdness there.
Wednesday afternoon kicks things off with a clean 6ft SSW swell, period at 16 seconds giving it some proper grunt. Combined energy is a healthy 1766, so there's plenty of push. Wind is light offshore from the SE, meaning clean lines. It's a solid start.
Thursday morning the swell bumps up to 7ft from the same SSW direction, with a 17-second period – that's proper groundswell. The cross-off breeze keeps things tidy. Afternoon gets even better: 8ft, offshore wind, energy ramping to 3127. This is getting serious.
Friday holds strong, with morning 7ft and afternoon 6ft swells. The period stays around 15-16 seconds, winds are favorable. All clean.
Saturday is where it really starts to hum. Morning sees a 7ft SSW swell with a 17-second period, and then it builds to 7ft in the afternoon with a bit more cloud cover. Energy readings are in the 2500-2758 range. This is excellent, powerful surf.
Sunday could be the pick of this first week. Morning has 7ft swell, and then Sunday afternoon goes glassy, with a 7ft SSW swell and not a breath of wind. That’s the kind of session you dream about. Energy is 1828, but the conditions make it feel bigger.
Monday eases slightly, with 5ft dropping to 5ft, but it's still glassy and clean, the period dropping to 14 seconds. It'll be a fun, less heavy day.
Tuesday the 18th sees a new pulse of SW swell hit. The morning is 5ft, but the energy reading jumps to 2435, so don't let the height fool you. The afternoon goes glassy with a 6ft SW swell and a combined energy of 2606. That’s a stand-out session in its own right.
The Real Standout: Wednesday 19th through Saturday 22nd. This is the meat of the outlook. Wednesday morning is glassy with a 8ft SW swell and an 18-second period – the longest of the whole run. Energy is 3661. Wednesday afternoon stays clean with 8ft. Then Thursday the 20th throws down a 10ft morning swell with energy at 4209. This is big, powerful, and clean. This is advanced level only. Friday the 21st keeps the quality with 7-7ft swells and a gentle offshore breeze, and Saturday the 22nd holds at 8ft with light cross-off winds. The consistency and quality over these four days is seriously impressive.
After that, the swell ticks down but stays rideable. Sunday the 23rd through Tuesday the 26th offer clean 6ft to 7ft swells, mostly glassy or with light offshore winds. The energy drops back to the 1300-2000 range. Good fun, but not the heavy stuff from mid-week.
The last few days, Wednesday the 26th and Thursday the 27th, see the swell drop to 5ft to 6ft. The wind picks up a touch, but it's still offshore, so the waves will be clean if a bit smaller.
Overall, Scar Reef is the only game in town, and it’s a ripper. If you're an advanced surfer, clear your calendar for that stretch from the 19th to the 22nd. Crowds are possible here “sometimes”, so on those peak days, expect some company as word gets out.
Stay safe out there.
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Wed afternoon, min 22°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Sat afternoon, min 23°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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) | SSW 16 | SSW 14 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SW 16 | SW 16 | SW 16 |
Wave Graph | ||||||||||||||||||||
1766 | 1080 | 2507 | 3127 | 2716 | 2028 | 1496 | 1275 | 2594 | 2758 | 2445 | 2164 | 1828 | 1208 | 1057 | 862 | 599 | 1172 | 1449 | 2058 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | off | off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | glassy | off | glassy | glassy | cross-off | cross-off | glassy | off |
High Tide | 11:42PM1.21m | 10:40AM1.83m | 00:06AM1.31m | 11:25AM1.76m | 00:31AM1.41m | 12:08PM1.64m | 00:57AM1.49m | 12:49PM1.47m | 1:23AM1.54m | 1:30PM1.29m | 1:49AM1.55m | 2:11PM1.10m | 2:16AM1.53m | |||||||
Low Tide | 5:14PM0.01m | 4:26AM0.75m | 5:45PM0.06m | 5:17AM0.64m | 6:14PM0.16m | 6:05AM0.56m | 6:39PM0.28m | 6:51AM0.52m | 7:01PM0.40m | 7:38AM0.50m | 7:20PM0.52m | 8:28AM0.52m | 7:34PM0.63m | |||||||
— | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | |
6:12 | — | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 24 | 26 | 27 | 24 | 26 | 27 | 25 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 27 | 27 | 25 |
Feels °C | 27 | 26 | 29 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 27 | 28 | 29 | 29 | 28 | 29 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 14 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SW 16 | SW 16 | SW 16 |
1766 | 1080 | 2507 | 3127 | 2716 | 2028 | 1496 | 1275 | 2594 | 2758 | 2445 | 2164 | 1828 | 1208 | 1057 | 862 | 599 | 1172 | 1449 | 2058 | |
Swell 2 Height (m) Direction Period (s) | — | SSW 18 | SSE 6 | — | SSE 9 | SSE 8 | SSW 21 | SSW 19 | SSE 7 | — | — | — | — | SE 5 | SE 5 | SE 5 | SSW 18 | SSW 13 | SW 20 | SW 20 |
— | 907 | 64 | — | 26 | 67 | 389 | 894 | 4 | — | — | — | — | 8 | 10 | 23 | 559 | 373 | 1134 | 881 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SSW 24 | SSW 21 | — | — | — | — | — | — | — | — | SW 25 | SW 20 | SW 23 | SW 21 | SE 6 | SE 6 |
— | — | — | — | 54 | 180 | — | — | — | — | — | — | — | — | 24 | 98 | 264 | 890 | 23 | 12 | |
Wind waves Height (m) Direction Period (s) | SSE 5 | — | SE 5 | — | SE 9 | SE 8 | SSE 5 | SSE 6 | SSE 5 | SSE 5 | SE 5 | SE 5 | SE 5 | ESE 5 | ESE 6 | ESE 6 | SE 5 | ESE 6 | — | ESE 4 |
54 | — | 74 | — | 97 | 110 | 33 | 26 | 14 | 20 | 25 | 21 | 31 | 29 | 44 | 55 | 10 | 62 | — | 24 | |
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.











