Surf Forecasts:
Downtowns surf forecast from 15 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 5PM (local time) - 8ft (2.5m), 18s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 11PM (local time) - 10ft (3.0m), 17s period, SW swell with 4,607 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 11PM (local time) - 7ft (2.2m), 16s period with SSW 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 Saturday (Aug 15) at 11PM. The primary swell is predicted to be 2.2m and 16s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Downtowns in the next 16 days are 3.0m 17s and forecast to arrive on Wednesday (Aug 19) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Friday (Aug 21) at 11AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sat 15th Aug) | 7ft (2.2m) 16s |
| Best Surf | 5PM (Wed 19th Aug) | 8ft (2.5m) 18s |
| Most Powerful | 11PM (Wed 19th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Downtowns over the next 16 days.
The Lowdown
Righto, Rusty here with a look at what's shaping up for the next couple of weeks. We've only got the one spot firing on all cylinders, so let's get straight into it.
Overall, we're looking at a solid run of surf with a mix of clean conditions and a few moments where the cross-shore wind might mess with things. The real star of the show is Downtowns, a reef break that's fairly consistent and favours a SW swell. Water temp is sitting at 80°, which is pretty much bang on average for this time of year, so no need to worry about a chill.
It kicks off with a bang this Saturday afternoon, the 15th of August. We've got a decent 7ft SSW groundswell rolling in with a very long 17-second period, and the wind is glassy from the SE. The combined swell energy is strong at 2758, so there's real grunt behind it. This is quality stuff for experienced surfers, and because it's a reef, that long period should set up some nice lines.
Sunday the 16th is a bit of a mixed bag. The morning has a cross-on breeze making it a bit scrappy, but the afternoon glass-off kicks in with an ESE wind at just 3 mph. That 6ft SSW swell with a 16-second period cleans right up. Monday the 17th through to Tuesday the 18th are both looking super clean with glassy mornings and light S winds. The swell drops a touch to 4-5ft, but the energy is still moderate to strong, and it's all in the right direction. This is that sweet spot for a surfer who wants quality without the absolute biggest size.
Now, the real standout window hits on Wednesday the 19th of August. The afternoon session is the pick of the whole forecast. A solid 8ft SW swell with an 18-second period, combined energy hammering at 4027, and glassy conditions from an E breeze. This is powerful, clean, and lined up. It's a big swell though, over 8ft, so this is experts-only territory. Beware that the morning has a cross-shore wind, so wait for that afternoon glass.
Thursday the 20th keeps the energy high with a 10ft SW swell in the morning, but again, that cross-shore wind makes it a bit tricky. The afternoon cleans up with a glassy ESE breeze and 8ft swell. Friday the 21st and Saturday the 22nd offer more excellent surf, with clean glassy conditions and solid 7ft to 7ft SW swell. Keep an eye out for crowds, as Downtowns can get busy sometimes.
From Sunday the 23rd onward, the swell eases, but it stays fun. You're looking at 5ft to 6ft SSW swell with mostly glassy or clean conditions right through to Monday the 24th. The second week, from the 25th of August, is a bit smaller and more inconsistent, but there are still windows of clean surf. The morning of the 27th has a long 20-second period SSW swell, but with a cross-shore wind. However, that afternoon glass-off on the 27th with a 5ft SW swell and a 19-second period looks like a good, clean session. The 28th also offers a decent, glassy afternoon.
The 29th and 30th look a bit more marginal with cross-shore breezes, though the 30th afternoon cleans up with a 7ft SW swell. All in all, we've got a solid 16 days of waves. The standout is without a doubt Wednesday the 19th of August afternoon at Downtowns. That's the one to circle.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sat afternoon, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Tue afternoon, min 22°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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 | SSW 16 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 16 | SW 16 | SW 16 | SSW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 17 | SSW 16 |
Wave Graph | ||||||||||||||||||||
2758 | 2358 | 2080 | 1743 | 1191 | 947 | 763 | 599 | 897 | 1239 | 1532 | 3615 | 3999 | 4484 | 4027 | 3334 | 2513 | 1910 | 2715 | 2869 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | off | cross-on | glassy | off | glassy | glassy | off | glassy | glassy | off | cross | glassy | off | cross | glassy | off | glassy | glassy | off |
High Tide | 00:57AM1.49m | 12:49PM1.47m | 1:23AM1.54m | 1:30PM1.29m | 1:49AM1.55m | 2:11PM1.10m | 2:16AM1.53m | 2:59PM0.93m | 2:47AM1.49m | 4:40PM0.79m | 3:27AM1.42m | 4:34AM1.36m | ||||||||
Low Tide | 6:39PM0.28m | 6:51AM0.52m | 7:01PM0.40m | 7:38AM0.50m | 7:20PM0.52m | 8:28AM0.52m | 7:34PM0.63m | 9:24AM0.56m | 7:38PM0.72m | 10:42AM0.59m | 7:02PM0.77m | 12:57PM0.57m | ||||||||
— | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 26 | 25 | 27 | 27 | 24 | 27 | 27 | 25 |
Feels °C | 28 | 28 | 28 | 27 | 27 | 29 | 28 | 28 | 28 | 30 | 28 | 28 | 27 | 28 | 29 | 28 | 26 | 28 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 16 | SW 16 | SW 16 | SSW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 17 | SSW 16 |
2758 | 2358 | 2080 | 1743 | 1191 | 947 | 763 | 599 | 897 | 1239 | 1532 | 3615 | 3999 | 4484 | 4027 | 3334 | 2513 | 1910 | 2715 | 2869 | |
Swell 2 Height (m) Direction Period (s) | — | SSE 6 | SE 5 | SE 5 | SE 5 | SSE 5 | SE 6 | SSW 18 | SW 13 | SW 20 | SW 19 | — | SE 6 | — | SE 6 | SE 6 | SE 6 | SE 7 | — | SE 6 |
— | 6 | 25 | 14 | 12 | 19 | 36 | 408 | 406 | 1157 | 1088 | — | 28 | — | 34 | 32 | 54 | 73 | — | 42 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 25 | SSW 20 | SW 23 | SW 21 | SE 5 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | 25 | 38 | 266 | 658 | 35 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 5 | SE 5 | — | SE 6 | ESE 5 | SE 6 | ESE 6 | SE 5 | ESE 5 | ESE 6 | SE 5 | ESE 6 | ESE 6 | SE 5 | ESE 7 | SE 6 | SE 6 | ESE 6 | SE 6 | ESE 6 |
19 | 22 | — | 44 | 42 | 44 | 81 | 12 | 38 | 81 | 16 | 80 | 63 | 25 | 116 | 91 | 157 | 209 | 54 | 141 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 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.











