
Surf Forecasts:
Scar Reef surf forecast from 31 Jul 2026:
- Best quality surf: Sunday 2 Aug, 11AM (local time) - 6.5ft (2.0m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 7 Aug, 8AM (local time) - 8ft (2.4m), 17s period, SSW swell with 3,354 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 11AM (local time) - 4.5ft (1.3m), 17s 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 Friday (Jul 31) at 11AM. The primary swell is predicted to be 1.3m and 17s period with a secondary swell of 1.1m and 13s. Another secondary swell of 1.3m and 6s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Scar Reef in the next 16 days are 2.4m 17s and forecast to arrive on Friday (Aug 07) at 8AM. 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 7s period and expected on Sunday (Aug 02) at 5PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Fri 31st Jul) | 4.5ft (1.3m) 17s |
| Best Surf | 11AM (Sun 2nd Aug) | 6.5ft (2.0m) 16s |
| Most Powerful | 8AM (Fri 7th Aug) | 8ft (2.4m) 17s |
Table - best surf conditions forecast for Scar Reef over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the table for the coming weeks. The swell window is about to open up and it's looking like a solid run of quality groundswell for those who know where to go.
We kick off with a clear winner right from the start.
Scar Reef is where the focus is. This reef and point setup is a bit sheltered, but it’s going to be working. It likes the swell from the SW, and that’s exactly what we’ve got coming. The water’s sitting at a pleasant 80°F, which is pretty much what you’d expect for this time of year, so no surprises there.
The first solid session lines up on Friday 31st July. The morning starts with a clean 4ft SSW swell riding a very long 17-second period. That’s proper groundswell energy, and with a light S breeze keeping it cross-off, the face will be smooth. The combined energy is a solid 1635 (moderate), and it’s only going to build. The afternoon cleans up even more with a 4ft SSW swell and a light ESE offshore breeze. This is a very good start for the crew who can handle a reef.
Saturday 1st August is a standout. The morning bumps up to 5ft from the SSW with a 16-second period, and the wind is light cross-off again. But the real gem is the afternoon: some clouds, a glassy 5 km/h ESE breeze, and the swell pushing 6ft from the SSW. The energy jumps to 1660 (moderate). That’s a long, clean, glassy session about to happen. Mark it in your calendar.
Sunday 2nd August sees the swell push to 7ft from the SSW. The morning is clean, and the afternoon is glassy again. The energy is now over 2000 (strong), and the period is still a long 16 seconds. This is excellent surf for experienced surfers, but at 7ft it’s getting into the territory where beginners might find it a bit heavy. The crowd factor is listed as “sometimes” here, so expect a few others who’ve been watching the charts.
The pattern continues through the first week. Monday and Tuesday hold steady at 6ft with clean conditions, mostly cross-off breezes. The energy stays in the moderate range, but the quality is high.
Now, the real juiciness starts to build. By Thursday 6th August, the swell jumps to 7ft from the SSW with a 17-second period. The combined energy is a powerful 2966 (strong) in the morning, and the afternoon sees a moderate offshore wind from the SE. This is expert territory.
The following week, from Friday 7th August through to Tuesday 11th August, the swell sits consistently between 7ft and 8ft, with a very long 17-second period. The energy readings are hitting the 3000 to 4000 range (strong) regularly. This is big, powerful groundswell. It’s going to be a bit of a paddle, but the sets will be clean and well-spaced. The wind stays favourable, mostly cross-off or light offshore. This is for the advanced crew only.
The real heavy-weight arrives on Thursday 13th August and Friday 14th August. We’re looking at 10ft to 12ft SSW swell with a 17 to 18-second period. The energy is massive, hitting 7417 on Thursday afternoon (very strong). This is not for the faint of heart. The Friday morning is particularly good, with an 12ft swell and a light SSW breeze (10 km/h). The conditions are clean, but at that size, it’s only for a handful of very experienced locals.
The run continues into Saturday 15th August with 8ft swell, but the energy is still strong. The conditions are clean, but the size is still demanding.
The standout of the whole period? Without a doubt, the stretch from Saturday 1st August through Sunday 2nd August. That 6ft to 7ft SSW groundswell with glassy or light offshore winds is the sweet spot. The energy is there, the shape will be there, and the crowd won’t be too crazy. If you can only pick one session, make it the afternoon of Saturday 1st August – glassy, 6ft, 17-second period, and a light breeze. That’s as good as it gets.
Keep in mind, this is a reef break, so respect the lineup. The long-period swells later in the period will be breaking straight at the beach, but here at the reef, the shape will be excellent.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri morning, min 22°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Wed afternoon, min 22°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
AM | 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 17 | SW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SW 16 | SSW 14 | SSW 15 | SSW 19 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||||
1009 | 854 | 1155 | 957 | 1626 | 1817 | 2027 | 2051 | 1928 | 1297 | 1279 | 1314 | 1244 | 1143 | 757 | 1142 | 1206 | 3019 | 2929 | 2631 | 2731 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | glassy | cross-off | cross-off | glassy | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | cross-off |
High Tide | 11:23AM1.68m | 00:54AM1.25m | 11:57AM1.63m | 1:15AM1.32m | 12:32PM1.53m | 1:38AM1.39m | 1:10PM1.40m | 2:02AM1.45m | 1:52PM1.23m | 2:31AM1.50m | 2:45PM1.05m | 3:06AM1.53m | 4:13PM0.87m | 3:54AM1.55m | |||||||
Low Tide | 6:31PM0.18m | 5:56AM0.75m | 6:52PM0.24m | 6:37AM0.71m | 7:12PM0.33m | 7:20AM0.68m | 7:31PM0.43m | 8:10AM0.64m | 7:49PM0.54m | 9:09AM0.61m | 8:04PM0.64m | 10:29AM0.57m | 8:13PM0.74m | ||||||||
6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | |
— | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 24 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 24 | 27 | 28 | 24 |
Feels °C | 28 | 27 | 26 | 27 | 27 | 28 | 29 | 28 | 28 | 29 | 28 | 28 | 29 | 27 | 28 | 27 | 27 | 25 | 27 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 14 | SSW 15 | SSW 19 | SSW 17 | SSW 16 | SSW 16 |
1009 | 854 | 1155 | 957 | 1626 | 1817 | 2027 | 2051 | 1928 | 1297 | 1279 | 1314 | 1244 | 1143 | 572 | 1142 | 1206 | 3019 | 2929 | 2631 | 2731 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SE 6 | SW 19 | SE 6 | SE 6 | SE 6 | SE 5 | SE 7 | SE 7 | SE 7 | — | SE 6 | — | SW 16 | SE 6 | SSW 20 | — | SE 6 | — | — |
434 | 326 | 39 | 384 | 34 | 19 | 12 | 28 | 47 | 47 | 43 | — | 24 | — | 757 | 15 | 515 | — | 37 | — | — | |
Swell 3 Height (m) Direction Period (s) | SSE 7 | SW 22 | — | SE 6 | — | — | — | — | W 15 | — | — | — | — | — | SE 6 | SW 22 | — | — | — | — | — |
56 | 73 | — | 17 | — | — | — | — | 5 | — | — | — | — | — | 18 | 229 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | SE 6 | SE 6 | SE 7 | SE 6 | SE 6 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | SE 7 | — | SE 6 | SE 6 | SE 6 | SE 6 | SE 5 | ESE 6 | SE 5 | SE 5 |
136 | 66 | 91 | 59 | 100 | 42 | 38 | 120 | 131 | 131 | 120 | 44 | — | 30 | 47 | 56 | 50 | 34 | 99 | 42 | 30 | |
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 | 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.











