Surf Forecasts:
Downtowns surf forecast from 26 Aug 2026:
- Best quality surf: Friday 28 Aug, 5AM (local time) - 8ft (2.5m), 18s period, SSW swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 8AM (local time) - 8ft (2.5m), 17s period, SW swell with 4,161 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 8AM (local time) - 3.5ft (1.0m), 16s period with SW swell.
Best Forecast Surf Conditions for Downtowns this week:
The surf forecast for Downtowns over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 27) at 8AM. The primary swell is predicted to be 1.0m and 16s period with a secondary swell of 1.1m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Downtowns in the next 16 days are 2.5m 17s and forecast to arrive on Friday (Aug 28) at 8AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Sunday (Aug 30) at 2PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 27th Aug) | 3.5ft (1.0m) 16s |
| Best Surf | 5AM (Fri 28th Aug) | 8ft (2.5m) 18s |
| Most Powerful | 8AM (Fri 28th Aug) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Downtowns over the next 16 days.
The Lowdown
Alright folks, it's Rusty here, and I've been staring at the charts for this next stretch. We've got a pretty solid run of surf coming up, all focused on one spot. The water's sitting at a balmy 80°, which is dead on average for this time of year, so no shock to the system there.
We're looking at a solid window of action starting on Thursday, August 27th, and running right through to Friday, September 11th. There are no gaps in the forecast.
Let's get into it. The main show is Downtowns (reef), a fairly exposed reef break that likes a good SW swell. The combined wave energy is strong to very strong, hitting a massive 1140 in the early stages and building all the way up to a beastly 3907 by Friday morning. That's a lot of power in the water.
The first few days, from Thursday the 27th through to Saturday the 29th, are a bit of a mixed bag. The swell is there, but the winds are a bit cross or cross-on, creating some ripples. It's not terrible, but it's not the best of the run either. The swell is 3ft to 4ft on Thursday, then jumps to 8ft on Friday. That's a big jump. At 8ft, this is experts-only territory, especially with a long period of 17 seconds. That long-period groundswell will be wrapping around the reef, but it's a powerful wave.
The real standout arrives on Monday, August 31st. The afternoon session is where it's at. The swell is a clean 5ft from the SW, with a long 18-second period, hitting the reef with combined energy of 1763. But the clincher is the wind: glassy, from the SE. That's a clean wave all day. This is the kind of afternoon where you paddle out and the lineup is just working. The forecast says "excellent surf conditions for experienced surfers," and I'm not going to argue.
Tuesday, September 1st, is another absolute cracker. The morning kicks off with a 7ft SW swell, 18-second period, and glassy conditions from the S. That's a proper, powerful wave. The energy is at 2844. This is the pick of the bunch for the whole run. The afternoon is also glassy, though a touch smaller. If you can only get out one day, make it Tuesday.
The rest of the first week and into the second week, from Wednesday, September 2nd, through to Friday, September 11th, the swell stays in the 5ft to 7ft range, with period dropping from 17 seconds down to 13, then picking up again. The winds are mostly light, with some glassy periods, especially on the afternoons of the 3rd, 6th, 7th, and 9th. The 9th of September afternoon is another highlight, with a 4ft SSW swell, 16-second period, and clean cross-off winds. It's a smaller, more user-friendly size.
The 10th of September afternoon is also a good call, with a 6ft SSW swell and clean conditions. Crowds at Downtowns are listed as "sometimes," so keep your eyes peeled, but on a good day it's a classic.
Overall, the best of the best is the morning of Tuesday, September 1st. Get on it.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu morning, min 22°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Mon afternoon, min 22°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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) | SW 16 | SW 20 | SSW 18 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 17 | SW 16 | SW 16 |
Wave Graph | |||||||||||||||||||||
558 | 769 | 3535 | 3877 | 3343 | 2594 | 1641 | 1237 | 1002 | 642 | 623 | 730 | 1000 | 1501 | 2150 | 2813 | 2352 | 2561 | 2302 | 2053 | 1532 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | off | cross-on | cross | glassy | cross-on | glassy | off | cross | glassy | off | cross | glassy | cross-off | glassy | glassy | off | cross | cross-off | off |
High Tide | 10:01AM1.62m | 11:27PM1.27m | 10:37AM1.64m | 11:42PM1.36m | 11:13AM1.62m | 11:59PM1.44m | 11:49AM1.55m | 00:19AM1.52m | 12:26PM1.43m | 00:41AM1.59m | 1:06PM1.29m | 1:06AM1.63m | 1:50PM1.11m | 1:36AM1.65m | |||||||
Low Tide | 5:07PM0.20m | 4:38AM0.72m | 5:28PM0.23m | 5:13AM0.62m | 5:48PM0.29m | 5:49AM0.53m | 6:07PM0.37m | 6:27AM0.46m | 6:25PM0.46m | 7:08AM0.41m | 6:41PM0.55m | 7:54AM0.39m | 6:56PM0.64m | ||||||||
6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | 6:13 | — | — | |
— | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 24 | 26 | 26 | 25 | 26 | 26 | 25 | 27 | 27 | 25 | 27 | 28 | 25 | 27 | 28 | 25 | 27 | 28 | 25 |
Feels °C | 28 | 26 | 25 | 28 | 26 | 28 | 28 | 27 | 28 | 29 | 28 | 28 | 29 | 29 | 27 | 29 | 30 | 28 | 28 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SSW 18 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 17 | SW 16 | SW 16 |
353 | 510 | 3535 | 3877 | 3343 | 2594 | 1641 | 1237 | 1002 | 642 | 623 | 449 | 1000 | 1501 | 2150 | 2813 | 2352 | 2561 | 2302 | 2053 | 1532 | |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 15 | SE 6 | SE 6 | SE 6 | SE 5 | SE 5 | SE 6 | SSW 24 | SSE 6 | SE 6 | SW 19 | SW 12 | SSW 12 | SSW 11 | SE 6 | SE 6 | — | SE 6 | — | — |
558 | 523 | 35 | 30 | 31 | 23 | 14 | 16 | 54 | 20 | 36 | 730 | 330 | 239 | 135 | 31 | 32 | — | 30 | — | — | |
Swell 3 Height (m) Direction Period (s) | SW 22 | SW 20 | — | — | — | — | SSW 6 | SSW 6 | SSW 6 | SW 21 | SSW 21 | SE 5 | SE 5 | SE 5 | — | — | — | — | — | — | — |
229 | 769 | — | — | — | — | 7 | 7 | 4 | 224 | 302 | 20 | 13 | 23 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SE 5 | SE 5 | — | — | — | SE 6 | SE 6 | SE 5 | SE 6 | ESE 6 | ESE 5 | ESE 5 | SE 6 | SE 5 | SE 6 | SE 6 | SE 6 | ESE 6 | SE 5 | SE 5 |
— | 26 | 26 | — | — | — | 43 | 47 | 13 | 59 | 84 | 45 | 51 | 69 | 24 | 91 | 75 | 36 | 103 | 53 | 27 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 4 | 0 | 4 | 4 | 0 | 4 | 0 | 0 | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 |
Best forecast wave conditions in Sumbawa | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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Information about the Downtowns Surf forecast
The above surf forecast table for Downtowns provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Downtowns can be found by selecting the local surf guide option on the grey menu. Our Downtowns 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 (Downtowns) 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 Downtowns 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.
Downtowns is 57 km (35 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.











