Surf Forecasts:
Scar Reef surf forecast from 14 Sep 2026:
- Best quality surf: Sunday 20 Sep, 11AM (local time) - 6.5ft (2.0m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 20 Sep, 8PM (local time) - 7ft (2.1m), 16s period, SW swell with 2,212 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 5AM (local time) - 6ft (1.8m), 15s period with SW 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 Tuesday (Sep 15) at 5AM. The primary swell is predicted to be 1.8m and 15s period. 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 2.1m 16s and forecast to arrive on Sunday (Sep 20) 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 1.3m 5s period and expected on Monday (Sep 21) at 5PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 15th Sep) | 6ft (1.8m) 15s |
| Best Surf | 11AM (Sun 20th Sep) | 6.5ft (2.0m) 16s |
| Most Powerful | 8PM (Sun 20th Sep) | 7ft (2.1m) 16s |
Table - best surf conditions forecast for Scar Reef over the next 16 days.
The Lowdown
Alright, let’s break it down for Scar Reef – the only spot firing in this outlook. It’s a reef and point break, advanced only, and you’ll have company sometimes. Needs a SW swell with offshore SE wind to really groove.
We’ve got a good run starting Tuesday 15 September. Morning brings a 6ft SW swell, long 15-second period, and a light cross-off wind. Wave energy is strong (1556). That holds through Wednesday and Thursday, with the swell bumping to 7ft by Thursday morning. Period drops to 14 seconds, but it’s still quality. Winds stay light.
The standout is Sunday 20 September. Morning shows a 7ft SW swell with a very long 16-second period, energy at 2027. Wind is light cross-off. Afternoon gets even cleaner: 7ft, same long period, energy at 2161, and glassy SSE winds. This is the pick of the bunch – clean, powerful, and the reef will handle it perfectly.
Next week keeps going. Monday 21 September still has 7ft SW swell, 15 seconds. Tuesday 22nd drops to 5ft, then Wednesday 23rd rebuilds to 6-7ft SSW with 16-second groundswell. Another top session.
But the big one – and mark this on the calendar – is Sunday 27 September. That morning it’s 10ft of SSW swell with an 18-second period. Wave energy is huge at 6395. Winds are cross-off from the south at 9 mph, clean. This is expert-only stuff: over 8ft and very long period. The reef will be heaving, but only for those who know what they’re doing.
Monday 28 September still has 8ft SSW swell, 17 seconds, energy at 3636 – still excellent but easing.
There’s no real dead gap, just a slight lull around 22nd with smaller 4-5ft surf. Water temp is about normal for this time of year.
That’s the full picture. Stay smart on the big days.
– Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Tue afternoon, min 23°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Fri afternoon, min 23°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SSW 15 | SSW 14 | SSW 14 | SW 14 | SSW 14 | SSW 14 | SW 14 | SW 14 | SW 14 | SW 18 | SW 16 | SW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 1418 | 1540 | 1349 | 1474 | 1237 | 1220 | 1693 | 1748 | 1447 | 1267 | 1019 | 845 | 763 | 606 | 597 | 973 | 2027 | 2087 | 2157 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | glassy | cross | glassy | cross-off | cross-off | cross-off | cross-off |
High Tide | 00:25AM1.66m | 1:14PM1.18m | 00:48AM1.64m | 1:52PM1.03m | 1:12AM1.59m | 2:37PM0.90m | 1:38AM1.51m | 2:08AM1.42m | 2:57AM1.32m | ||||||||||
Low Tide | 7:13AM0.31m | 6:26PM0.64m | 7:53AM0.35m | 6:36PM0.71m | 8:38AM0.43m | 6:33PM0.77m | 9:40AM0.51m | 11:39AM0.56m | 1:51PM0.51m | ||||||||||
 |  | | | | | | | | | | | | |  | | | | | |
 | — | 6:07 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:03 | — | — | 6:03 | — | — |
 | 6:08 | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 27 | 28 | 25 | 27 | 27 | 25 | 27 | 27 | 25 | 26 | 27 | 25 | 26 | 27 | 26 | 26 | 27 | 25 |
Feels °C | 27 | 28 | 29 | 27 | 29 | 27 | 27 | 29 | 29 | 28 | 29 | 30 | 28 | 29 | 31 | 30 | 28 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SSW 15 | SSW 14 | SSW 14 | SW 14 | SSW 14 | SSW 14 | SW 14 | SW 14 | SW 14 | SW 18 | SW 16 | SW 16 | SW 16 |
| kJ | 1418 | 1540 | 1349 | 1474 | 1237 | 1220 | 1693 | 1748 | 1447 | 1267 | 1019 | 845 | 763 | 606 | 597 | 973 | 2027 | 2087 | 2157 |
Swell 2 Height (m) Direction Period (s) | — | SE 6 | — | SW 24 | SSE 6 | W 16 | — | — | SE 6 | — | SE 6 | SE 6 | SW 20 | SW 18 | SW 18 | SW 13 | SE 6 | SE 6 | SE 6 |
| kJ | — | 16 | — | 22 | 27 | 5 | — | — | 21 | — | 23 | 11 | 99 | 210 | 332 | 336 | 39 | 18 | 18 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SSW 21 | — | — | — | — | — | SW 22 | SW 21 | SE 5 | SE 5 | SE 6 | SE 7 | — | — | — |
| kJ | — | — | — | — | 45 | — | — | — | — | — | 18 | 18 | 4 | 6 | 11 | 15 | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 5 | S 5 | SE 5 | SSE 5 | SE 6 | SSE 5 | SE 5 | ESE 6 | ESE 6 | SE 5 | ESE 6 | — | — | SE 5 | SE 6 | SE 7 | — | SE 6 | SE 6 |
| kJ | 29 | 7 | 66 | 22 | 64 | 33 | 49 | 77 | 57 | 12 | 58 | — | — | 15 | 33 | 44 | — | 56 | 54 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 23 | 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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