
Surf Forecasts:
Sunset Left surf forecast from 5 Sep 2026:
- Best quality surf: Sunday 6 Sep, 8AM (local time) - 6ft (1.9m), 14s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 5AM (local time) - 8ft (2.5m), 16s period, SSW swell with 3,586 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 8AM (local time) - 6ft (1.9m), 14s period with SSW swell.
Best Forecast Surf Conditions for Sunset Left this week:
The surf forecast for Sunset Left over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 06) at 8AM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 0.6m and 18s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Sunset Left in the next 16 days are 2.5m 16s and forecast to arrive on Wednesday (Sep 09) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Saturday (Sep 12) at 11PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 6th Sep) | 6ft (1.9m) 14s |
| Best Surf | 8AM (Sun 6th Sep) | 6ft (1.9m) 14s |
| Most Powerful | 5AM (Wed 9th Sep) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Sunset Left over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it. We’ve got a solid 16-day window ahead, but it’s a mixed bag of conditions. The one spot that’s on the radar is Sunset Left, a consistent reef break that’s served up a near-constant supply of SW groundswell, but the wind’s been a bit of a character. This is a spot for the experienced crew – when it’s on, it’s on, but the conditions will test your patience.
The water’s sitting at a temperature that’s about average for this time of year, so no surprises there.
We kick off on Sunday, September 6th. The swell is already building, with a solid 5.6ft to 7.2ft SSW groundswell rolling in. The period is long, around 14 to 17 seconds, which means proper energy. The combined energy is strong, hitting 1711 to 3433, so there’s plenty of push. Problem is, the wind is cross-onshore from the SSE and SE, gusting 12 to 12 mph, making it choppy and a bit messy. The surf is there, but it’s a fight. Not the best for a clean session.
Monday, September 7th and Tuesday, September 8th follow a similar script. Swell holds steady around 6.6ft to 7.2ft, still from the SSW, with periods around 14 seconds. The wind stays cross-onshore, and the quality is marginal. The energy is still there, but the chop is a major downer. The afternoon on Tuesday sees a slight improvement with a longer period of 18 seconds, but it’s still cross-onshore.
Wednesday, September 9th sees a bump in size, with the morning swell hitting 8.2ft from the SSW. That’s getting into the “experts only” territory. The period is 16 seconds, and the energy is very strong at 3278. But again, the wind is cross-onshore from the SSE at 12 mph. It’s a powerful, heavy wave, but it’s messy.
The pattern continues through Thursday, September 10th and Friday, September 11th. The swell is still in the 5.6ft to 7.2ft range, but the wind remains a persistent cross-onshore or cross-shore problem. Friday afternoon sees a shift to a cross-shore wind, which is a slight improvement, but the chop is still there.
Saturday, September 12th and Sunday, September 13th are more of the same. The swell drops a bit to 5.2ft to 6.2ft, but the wind is still cross-onshore. The combined energy is still moderate to strong, but the conditions are poor to marginal at best.
Monday, September 14th through Wednesday, September 16th is a rough patch. The swell is still 5.9ft to 6.9ft, but the wind is relentless. The energy is there, but the wave quality is poor. The afternoon on Wednesday the 16th finally sees a slight improvement with a gentle cross-shore breeze, but it’s still a far cry from clean.
Now, there’s a glimmer of hope. Friday, September 18th and Saturday, September 19th bring a change. The wind turns offshore from the SSW on the mornings, blowing at 9 mph. This is what we’ve been waiting for. The swell is still strong, 6.2ft to 7.5ft from the SW, with a period of 16 to 17 seconds. The energy is very strong, hitting 2420 to 2844. The conditions are marginal, but the offshore wind is a game-changer. The surf will be a lot cleaner, with proper lines. The afternoon on Saturday the 19th goes back to cross-onshore, so the mornings are the window.
Sunday, September 20th offers a solid send-off. The swell holds at 8.2ft from the SW, with a period of 15 seconds and very strong energy at 3261 and 2906. The wind is still cross-onshore, so it’s going to be a powerful, chunky wave, but it’s sizeable.
Monday, September 21st wraps things up with the wind turning offshore again on the morning. The swell is 6.6ft from the SW, and the morning looks promising.
The Verdict: The best bet is Saturday, September 19th morning. The swell is solid at 6.9ft from the SW, the period is a long 17 seconds, and the offshore wind from the SSW will clean it up. The energy is strong (2420). It’s a reef break, so that long period will translate into proper, grinding walls. It’s for advanced surfers, and crowds are possible, so get in early. The Friday, September 18th morning is also a good call, with 6.2ft SW swell and offshore wind. That’s the standout window.
The rest of the week is a waiting game. The swell is consistent, but the wind blows it out. The energy is always there, but you need to pick the right morning. The long period swells are best here, but they need the offshore wind to shape up.
The setup is a
Short Range ForecastMostly dry. Warm (max 26°C on Sun afternoon, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Wed morning. Warm (max 27°C on Fri afternoon, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
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 14 | SSW 14 | SSW 17 | SSW 16 | SSW 14 | SSW 14 | SW 14 | SSW 13 | SW 18 | SSW 17 | SSW 16 | SW 16 | SW 16 | SSW 14 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||
1560 | 1193 | 2699 | 2441 | 1835 | 1582 | 1161 | 1309 | 1588 | 2296 | 3278 | 2594 | 2262 | 1261 | 2438 | 2328 | 2262 | 1884 | 1716 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross | cross-off |
High Tide | 3:25AM2.33m | 6:07PM1.44m | 5:27AM2.16m | 8:42PM1.68m | 7:37AM2.26m | 9:21PM1.98m | 8:50AM2.47m | 9:52PM2.28m | 9:40AM2.67m | 10:21PM2.55m | 10:21AM2.79m | 10:49PM2.78m | |||||||
Low Tide | 8:25PM1.10m | 11:16AM0.94m | 9:23PM1.37m | 1:48PM0.84m | 1:14AM1.42m | 2:54PM0.62m | 2:47AM1.13m | 3:35PM0.42m | 3:38AM0.81m | 4:08PM0.27m | 4:18AM0.52m | 4:39PM0.20m | 4:54AM0.30m | ||||||
— | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — | — | |
6:00 | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | 2 | — | — | — | — | — | — |
Temp °C | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 27 | 26 |
Feels °C | 27 | 28 | 28 | 27 | 26 | 27 | 26 | 27 | 27 | 27 | 27 | 26 | 26 | 27 | 28 | 26 | 26 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 17 | SSW 16 | SSW 14 | SSW 14 | SW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 16 | SW 16 | SW 16 | SSW 14 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 |
1560 | 1193 | 2699 | 2441 | 1835 | 1582 | 1161 | 1309 | 1405 | 2296 | 3278 | 2594 | 2262 | 1261 | 2438 | 2328 | 2262 | 1884 | 1716 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | SSW 17 | SSW 13 | — | SW 24 | SW 22 | SW 20 | SSW 19 | SW 18 | SSW 13 | — | — | — | SSW 18 | — | SW 27 | SSW 26 | SW 24 | SE 6 |
154 | 510 | 734 | — | 22 | 73 | 338 | 1004 | 1588 | 953 | — | — | — | 1021 | — | 28 | 66 | 90 | 32 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 24 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 197 | |
Wind waves Height (m) Direction Period (s) | — | SE 4 | — | — | — | — | — | — | — | — | — | SSE 4 | SSE 4 | ESE 4 | SSE 4 | SE 5 | SE 5 | SE 5 | SE 6 |
— | 8 | — | — | — | — | — | — | — | — | — | 17 | 15 | 9 | 19 | 26 | 25 | 48 | 69 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 23 | 138 | 138 | 13 | 140 | 138 | 13 | 138 | 138 | 87 | 138 | 138 | 138 | 138 | 285 | 87 | 138 | 283 | 0 |
Best forecast wave conditions in Sumba | |||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Sunset Left Surf forecast
The above surf forecast table for Sunset Left provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sunset Left can be found by selecting the local surf guide option on the grey menu. Our Sunset Left 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 (Sunset Left) 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 Sunset Left 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.
Are you planning a holiday in Sumba? If you are looking for accommodation near Sunset Left, camping, hotels and holiday cottages in Sumba, consider staying in Adalara which is 30 km (19 miles) away.










