
Surf Forecasts:
Downtowns surf forecast from 5 Aug 2026:
- Best quality surf: Monday 10 Aug, 8PM (local time) - 10ft (3.0m), 18s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 11PM (local time) - 10ft (3.0m), 18s period, SSW swell with 6,134 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 5AM (local time) - 7ft (2.1m), 18s 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 Thursday (Aug 06) at 5AM. The primary swell is predicted to be 2.1m and 18s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Downtowns in the next 16 days are 3.0m 18s and forecast to arrive on Monday (Aug 10) 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 1.4m 6s period and expected on Friday (Aug 07) at 5PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 6th Aug) | 7ft (2.1m) 18s |
| Best Surf | 8PM (Mon 10th Aug) | 10ft (3.0m) 18s |
| Most Powerful | 11PM (Mon 10th Aug) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Downtowns over the next 16 days.
The Lowdown
Alright folks, Rusty here. We’ve only got one spot on the menu for this outlook, and it’s looking like a solid run of swell for the crew who can handle it.
The big story is a long-lasting pulse of SSW groundswell that kicks in from the get-go and keeps the energy alive for the best part of two weeks. This is definitely not a beginner's window, but for the experienced surfer, there are some absolute gems in here.
We’ll start with Downtowns, a reef break that’s fairly consistent and handles a SSW swell well. The water temp is pretty average for this time of year, nothing to write home about there.
First up, Thursday the 6th and Friday the 7th of August are your early standouts. You’ve got a solid 7 ft to 8 ft SSW swell rolling in with a very long period of 16-17 seconds. That’s proper groundswell energy, and the combined energy reading is strong, sitting around 2400 to nearly 3500. The real kicker? The wind is glassy – light SSE or ESE breezes. That means clean, smooth faces with no chop. This is as good as it gets for a reef break, with the long period likely giving you long walls and proper shape. Crowds are sometimes an issue here, so get out early.
Saturday the 8th and Sunday the 9th stay solid at 7 ft to 8 ft, but the wind shifts to a light cross-off. It’s still clean and the swell quality holds, but it loses that perfect glassy sheen. Still excellent surf, just not quite the top-tier conditions of Thursday and Friday.
We hit a bit of a tricky patch from Monday the 10th through to Thursday morning the 13th. The swell actually pumps up, hitting 10 ft on Monday and Tuesday, with combined energy jumping up to 5000-6000. That’s a lot of power. But the wind gets messy – cross and cross-on conditions with moderate breezes. This creates a cross-chop and wind ripples. For a spot like Downtowns, these are the days for experts only. The waves will be big and powerful, but the surface won't be pretty.
Thursday afternoon the 13th sees a return to form – glassy conditions and a solid 8 ft SSW swell. That’s another top-tier session if you can make it.
Then we’ve got the true standout of the entire run: Saturday the 15th of August. The morning shows a 10 ft SSW swell, 19-second period, combined energy of 5435 – massive power – and a light cross-off breeze. The afternoon is even better: 10 ft, 18-second period, 4821 energy, and the wind goes *offshore* from the east. That’s the dream combo for a reef: big, long-period groundswell with offshore wind. It will be hollow, clean, and powerful. A day for the quiver of a lifetime.
Sunday the 16th and Monday the 17th stay clean but the size and energy start to drop off (7 ft down to 6 ft). Still fun, but not the barnstormer Saturday was.
There’s a drop in quality on Tuesday the 18th and Wednesday morning the 19th, with smaller 3 ft to 4 ft swell and cross-shore winds. But then Wednesday the 19th afternoon throws another big one at us: 8 ft, 18-second SSW groundswell with glassy conditions and energy of 4385. That’s another incredible session that’s well worth chasing, though the wind looks to turn a little cross-on in the afternoon.
From the 20th onwards, the swell hangs around at 7 ft to 8 ft, but the winds are mostly cross or cross-on, making it more of a solid, workable surf rather than a pristine standout.
The Bottom Line: If you can only pick one day, make it Saturday the 15th of August. The offshore wind with a big, long-period SSW swell is as good as it gets for Downtowns. The other absolute must-surf windows are the glassy mornings on Thursday the 6th, Friday the 7th, and Wednesday the 19th. For the rest of the time, there’s plenty of swell, but you’ll need to be a local to know the tides and manage the wind.
Stay safe out there.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Thu afternoon, min 22°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Sun afternoon, min 22°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 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 19 | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 19 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||
2493 | 2434 | 2376 | 2178 | 2939 | 3444 | 3751 | 2936 | 2697 | 2389 | 2330 | 2096 | 1648 | 2696 | 5961 | 5996 | 4947 | 3267 | 3142 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | glassy | glassy | off | glassy | glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-on | cross | cross-off | cross | cross | off |
High Tide | 3:06AM1.53m | 4:13PM0.87m | 3:54AM1.55m | 5:03AM1.57m | 6:28AM1.62m | 7:48AM1.69m | 11:09PM1.05m | 8:54AM1.78m | 11:21PM1.13m | ||||||||||
Low Tide | 8:04PM0.64m | 10:29AM0.57m | 8:13PM0.74m | 12:24PM0.49m | 2:10PM0.34m | 3:14PM0.19m | 4:00PM0.07m | 2:12AM0.97m | 4:39PM0.01m | 3:28AM0.87m | |||||||||
— | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | |
6:10 | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 27 | 28 | 24 | 26 | 26 | 25 | 26 | 27 | 24 | 27 | 28 | 24 | 26 | 26 | 24 | 26 | 26 | 24 |
Feels °C | 28 | 28 | 28 | 25 | 28 | 27 | 27 | 27 | 27 | 25 | 27 | 27 | 24 | 27 | 26 | 25 | 26 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 19 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 |
2493 | 2434 | 2376 | 2178 | 2939 | 3444 | 3751 | 2936 | 2697 | 2389 | 2330 | 2096 | 1648 | 2696 | 5961 | 5996 | 4947 | 3267 | 3142 | |
Swell 2 Height (m) Direction Period (s) | SE 6 | SE 6 | — | — | SE 7 | SE 6 | SE 5 | SE 6 | — | — | — | S 27 | SSW 22 | SSW 14 | — | — | — | SSW 19 | — |
26 | 34 | — | — | 54 | 54 | 41 | 27 | — | — | — | 15 | 268 | 1525 | — | — | — | 1667 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SSW 6 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 6 | ESE 6 | SE 6 | SE 6 | ESE 7 | SE 6 | — | SE 6 | SE 5 | SE 5 | SSE 5 | SSE 5 | SSE 5 | — | — | — | — | — | — |
49 | 124 | 50 | 38 | 138 | 133 | — | 71 | 49 | 23 | 34 | 50 | 21 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 4 | 4 | 0 | 4 | 97 | 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.











