
Surf Forecasts:
Downtowns surf forecast from 28 Jul 2026:
- Best quality surf: Thursday 30 Jul, 11AM (local time) - 4.5ft (1.3m), 15s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 2 Aug, 2PM (local time) - 7ft (2.1m), 17s period, SSW swell with 2,431 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 11AM (local time) - 2.5ft (0.8m), 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 Tuesday (Jul 28) at 11AM. The primary swell is predicted to be 0.8m and 16s period with a secondary swell of 0.8m and 7s. Another secondary swell of 0.9m and 7s is also forecast. 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 2.1m 17s and forecast to arrive on Sunday (Aug 02) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 7s period and expected on Sunday (Aug 02) at 5PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Tue 28th Jul) | 2.5ft (0.8m) 16s |
| Best Surf | 11AM (Thu 30th Jul) | 4.5ft (1.3m) 15s |
| Most Powerful | 2PM (Sun 2nd Aug) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for Downtowns over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s just get straight into it. We’ve got one spot on the radar for the whole sixteen days, and it’s a good one. The name of the game is Downtowns, a reef setup that’s fairly consistent and advanced. It’s a SW-facing reef, and the swell is coming from the SSW to SW, which is exactly what it wants.
The water is sitting at 80°, which is bang on average for this time of year, so no surprises there.
The opening days are clean but a little on the small side. Tuesday morning, July 28, we’re looking at 3 ft of SSW swell with a very long period of 16 seconds. That’s a proper groundswell, but it’s small. Winds are light and cross-off (6 mph), so it’s clean. The combined energy is moderate (557). Not a headline, but you can get wet if you’re desperate. Wednesday the 29th picks up a little, with 4 ft to 4 ft and a 14-second period; still clean, energy climbing into the high 700s.
Now, Thursday July 30 is where it starts to get real. The swell holds at 4 ft, but the period jumps to 15 seconds, and the energy pushes into four digits (1338). Winds are light cross-off and it’s clean. That’s a solid pulse for a reef. The wave comments say excellent for experienced surfers, and I agree. Friday July 31 is the early standout. Glassy conditions, 3 mph winds, and a 4 ft swell with a 17-second period. The energy is strong (1603). This is the kind of morning you set the alarm for. The long period means those lines will be lined up, and with the reef, it’s going to be a treat.
The first weekend of August, Saturday the 1st and Sunday the 2nd, sees the swell push up. Saturday morning has a bit of a cross-on breeze, but the afternoon goes glassy again with 6 ft. Sunday the 2nd is a big one: 7 ft to 7 ft, glassy, 16 to 17 seconds, and the energy is strong (2093 to 2376). This is for advanced surfers only, as it’s over 5 ft, but it’s clean and powerful. That Sunday is a true highlight.
Monday August 3 holds at 6 ft and glassy, but the period drops to 15 seconds. Still very good, but the energy drops a little. Tuesday August 4 gets a bit messy with a cross-shore breeze and marginal conditions. We skip that. Wednesday August 5 comes back clean with 5 ft and a cross-off breeze, and energy is solid (1258). Thursday August 6 has a cross-shore breeze in the morning, but the afternoon cleans up with 7 ft and a 17-second period, and energy is very strong (2581). Another good call.
Friday August 7 is a big one. The morning is 8 ft, cross-off at 9 mph, and a 16-second period. The energy is massive (3032). That’s big, powerful, and only for the experienced. The afternoon gets a bit windier (16 mph), so get it in the morning. Saturday August 8 is a weird one. The morning has a 4 ft swell with a 23-second period, which is incredibly long. That’s a very long period groundswell, which can be a bit too straight for beach breaks, but on a reef like Downtowns, it might just be perfect. The energy is huge (2964). The afternoon jumps to 8 ft, 20 seconds, and the energy is off the charts at 5653. That is a massive pulse. But it’s for advanced only.
Sunday August 9 is the biggest, with 12 ft and an 18-second period. The energy is extreme (6989). That is not for the faint of heart. The wind is a cross-shore in the morning, so it might be a bit lumpy, but the afternoon is cross-off. This is expert-only territory. The following week, from August 10 to 12, the swell stays solid at 8 ft, with periods around 15 to 16 seconds. The energy remains very strong (2700 to 3740). The wind is mostly cross-off or cross-shore, so it’s a bit of a mixed bag, but there are plenty of windows for the experienced crew.
Overall, the standout is the glassy period from Friday July 31 right through Sunday August 2. That’s the best quality, with good size, clean conditions, and that long-period groundswell wrapping in perfectly for the reef. If you can only pick one session, make it the morning of Sunday August 2. The Saturday August 8 afternoon is also a massive, powerful wave, but it’s a bit more of a wildcard.
Stay safe out there, and respect the reef.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Tue afternoon, min 22°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Sun afternoon, min 22°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | |||||||||||||||
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 15 | SSW 14 | SSW 14 | SSW 13 | SSW 15 | SSW 19 | SSW 14 | SSW 17 | SW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 15 |
Wave Graph | |||||||||||||||||||||
314 | 314 | 461 | 561 | 569 | 634 | 784 | 758 | 612 | 1009 | 854 | 1155 | 957 | 1644 | 1817 | 2051 | 2319 | 1834 | 1297 | 1279 | 1087 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | glassy | glassy | off | cross-on | glassy | off | glassy | glassy | off | glassy | glassy | glassy |
High Tide | 9:33AM1.62m | 11:59PM1.09m | 10:12AM1.67m | 00:15AM1.13m | 10:48AM1.70m | 00:34AM1.19m | 11:23AM1.68m | 00:54AM1.25m | 11:57AM1.63m | 1:15AM1.32m | 12:32PM1.53m | 1:38AM1.39m | 1:10PM1.40m | 2:02AM1.45m | |||||||
Low Tide | 5:14PM0.14m | 3:59AM0.89m | 5:42PM0.12m | 4:39AM0.84m | 6:07PM0.13m | 5:17AM0.80m | 6:31PM0.18m | 5:56AM0.75m | 6:52PM0.24m | 6:37AM0.71m | 7:12PM0.33m | 7:20AM0.68m | 7:31PM0.43m | ||||||||
6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | |
— | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 24 | 26 | 27 | 24 | 26 | 27 | 24 | 26 | 26 | 24 | 25 | 26 | 25 | 26 | 27 | 25 | 26 | 26 | 25 |
Feels °C | 27 | 27 | 24 | 27 | 27 | 24 | 28 | 27 | 25 | 28 | 27 | 26 | 27 | 28 | 28 | 28 | 29 | 28 | 28 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSE 7 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 15 | SSW 14 | SSW 14 | SSW 17 | SW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 15 |
67 | 314 | 461 | 561 | 569 | 634 | 784 | 647 | 612 | 1009 | 854 | 1155 | 957 | 1644 | 1817 | 2051 | 2319 | 1834 | 1297 | 1279 | 1087 | |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SW 12 | S 26 | SW 24 | SSW 23 | SW 21 | SSE 7 | SSW 19 | SSW 18 | SSW 13 | SSW 13 | SE 7 | SW 19 | SE 6 | — | SE 7 | SE 7 | W 15 | SE 6 | SE 6 | SE 6 |
314 | 72 | 13 | 22 | 52 | 116 | 78 | 758 | 553 | 434 | 326 | 73 | 384 | 33 | — | 42 | 57 | 4 | 24 | 36 | 25 | |
Swell 3 Height (m) Direction Period (s) | SSW 12 | — | — | — | — | SSW 21 | SSW 20 | — | SE 6 | SE 7 | SE 6 | — | SE 7 | — | — | — | — | — | — | — | — |
99 | — | — | — | — | 178 | 256 | — | 58 | 46 | 61 | — | 28 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 7 | SE 6 | SE 7 | SE 7 | SE 6 | SE 7 | SE 6 | SE 6 | SE 7 | SE 7 | SE 6 | ESE 7 | ESE 6 | SE 6 | ESE 7 | ESE 7 | SE 6 | ESE 6 | SE 6 | ESE 6 |
77 | 173 | 123 | 144 | 158 | 78 | 220 | 94 | 132 | 114 | 127 | 33 | 78 | 71 | 25 | 138 | 159 | 40 | 71 | 88 | 71 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Sumbawa | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.










