Surf Forecasts:
Downtowns surf forecast from 24 Aug 2026:
- Best quality surf: Friday 28 Aug, 5AM (local time) - 8ft (2.5m), 18s period, SSW swell with cross-offshore 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★+): Monday 24 Aug, 2PM (local time) - 6ft (1.9m), 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 Monday (Aug 24) at 2PM. The primary swell is predicted to be 1.9m and 16s period with a secondary swell of 0.3m and 20s. 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 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 1.6m 6s period and expected on Tuesday (Aug 25) at 11AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Mon 24th Aug) | 6ft (1.9m) 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, grab your wetsuit, 'cause the next couple of weeks are looking pretty special around Downtowns. We've got a solid, consistent run of groundswell hitting this reef, so if you've got a longboard or a step-up, you're in for a treat.
This is a classic, powerful SW swell, right in the wheelhouse for Downtowns. The water temp is sitting at 79°, which is just about bang-on average for this time of year, so it’s comfortable for a long session. The swell energy is going to be ramping up, hitting some serious numbers like 1856 on Monday, so you know there's some real force behind these waves.
Let’s break it down. We kick off on Monday, August 24th, with clean 7 ft SSW groundswell and a 16-second period. That’s long-period, energy-packed stuff. The wind is a light cross-off, keeping those faces smooth. This is proper advanced territory at that size—if you're not confident, give it a wide berth, because it’s going to be heavy.
Tuesday the 25th is the big standout. The morning is still clean at 6 ft, but the real magic is Tuesday afternoon. The wind goes glassy, the swell bumps up a touch to 6 ft from the SW with a 16-second period, and the energy is pumping at 1494. We’re talking silky, lined-up walls. The crowd factor is just “sometimes” here, so keep your head on a swivel, but it’s worth it. That’s the session to plan your day around.
Wednesday the 26th holds that same quality with glassy conditions all day and 6 ft swell. It’s still a solid size, but the period drops to 14 seconds, making it a touch more manageable.
Then we hit a bit of a lull on Thursday the 27th. The swell drops right down to 4 ft, and the wind goes cross-on. The energy dips to 860, so you can probably give that one a miss unless you're desperate for a paddle.
Things get interesting again on Friday, August 28th. We’ve got a spike to 8 ft SSW groundswell with a 17-second period. The energy is massive—4123 in the morning. But the wind is cross, not clean, so it’s going to be a bit of a battle. This is strictly for the pros; at this size and power, it's a real handful.
The next week settles down a touch. Monday, August 31st, the afternoon looks unreal with a 6 ft SW groundswell, 19-second period, and glassy conditions—energy is 2625 again. Tuesday, September 1st, is also a standout with 7 ft SW swell and glassy, glassy winds all day. That’s another one to circle on the calendar.
From there, the consistency holds into the second week with 5 ft to 7 ft waves, mostly clean, but the wind isn't as perfect. The period drops into the 14-15 second range, so it’s not quite as punchy, but there will still be plenty of fun waves for the experienced crew.
The very end of the forecast, around September 7th and 8th, sees the swell drop back to 5 ft – 5 ft. The energy is around 798, so it’s getting weaker, but it’s still a clean, fun size for a longboard if the conditions play ball.
So, to sum it up: of the entire run, Tuesday afternoon the 25th and Monday afternoon the 31st are your absolute top-tier moments. Glassy, groundswell, and pumping. Get out there.
- Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Mon morning, min 22°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Sat morning, min 22°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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) | SSW 16 | SSW 16 | SSW 14 | SSW 15 | SW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 12 | SW 16 | SW 20 | SW 18 | SSW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SSW 13 | SW 19 |
Wave Graph | |||||||||||||||||||||
1856 | 1608 | 1057 | 1206 | 1449 | 1319 | 1143 | 1038 | 426 | 558 | 769 | 3703 | 4123 | 3197 | 2594 | 1641 | 1237 | 1002 | 642 | 649 | 730 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | glassy | off | glassy | glassy | off | cross-on | cross | cross-off | cross | cross | off | cross | glassy | off | glassy | glassy | off |
High Tide | 11:17PM1.08m | 8:38AM1.49m | 11:10PM1.12m | 9:22AM1.57m | 11:15PM1.19m | 10:01AM1.62m | 11:27PM1.27m | 10:37AM1.64m | 11:42PM1.36m | 11:13AM1.62m | 11:59PM1.44m | 11:49AM1.55m | 00:19AM1.52m | ||||||||
Low Tide | 3:53PM0.29m | 2:37AM1.00m | 4:20PM0.23m | 3:25AM0.91m | 4:44PM0.20m | 4:03AM0.82m | 5:07PM0.20m | 4:38AM0.72m | 5:28PM0.23m | 5:13AM0.62m | 5:48PM0.29m | 5:49AM0.53m | 6:07PM0.37m | ||||||||
6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 24 | 27 | 28 | 24 | 26 | 26 | 25 | 26 | 26 | 24 | 26 | 26 | 24 | 27 | 27 | 25 | 27 | 28 | 25 |
Feels °C | 29 | 27 | 25 | 27 | 28 | 25 | 28 | 27 | 27 | 28 | 26 | 25 | 27 | 25 | 26 | 29 | 29 | 27 | 29 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 14 | SSW 15 | SW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 12 | SW 16 | SSW 12 | SW 18 | SSW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SSW 13 | SW 12 |
1856 | 1608 | 1057 | 1206 | 1449 | 1319 | 1143 | 1038 | 426 | 558 | 440 | 3703 | 4123 | 3197 | 2594 | 1641 | 1237 | 1002 | 642 | 649 | 358 | |
Swell 2 Height (m) Direction Period (s) | — | SW 20 | SW 18 | SE 6 | SE 6 | — | — | SW 20 | SSW 13 | SW 12 | SW 15 | — | — | — | — | SE 6 | SW 22 | SSW 24 | SSE 5 | SSW 21 | SW 19 |
— | 97 | 199 | 54 | 38 | — | — | 15 | 229 | 282 | 523 | — | — | — | — | 37 | 18 | 54 | 26 | 302 | 730 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SSW 6 | — | — | — | SW 16 | S 5 | SW 20 | — | — | — | — | SSW 6 | S 26 | — | SSW 21 | SE 5 | SW 24 |
— | — | — | — | 7 | — | — | — | 278 | 20 | 769 | — | — | — | — | 8 | 13 | — | 180 | 10 | 144 | |
Wind waves Height (m) Direction Period (s) | SE 5 | SE 5 | SE 5 | ESE 6 | ESE 6 | ESE 5 | ESE 5 | ESE 5 | ESE 4 | SSE 5 | SE 5 | — | SE 5 | SE 5 | SE 5 | ESE 6 | SSE 6 | SSE 5 | SE 5 | ESE 5 | SSE 5 |
32 | 62 | 30 | 167 | 105 | 52 | 51 | 42 | 23 | 20 | 18 | — | 34 | 27 | 35 | 99 | 40 | 34 | 55 | 34 | 32 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 176 | 0 | 4 | 4 | 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.











