
Surf Forecasts:
Downtowns surf forecast from 31 Jul 2026:
- Best quality surf: Friday 31 Jul, 8PM (local time) - 5ft (1.6m), 17s period, SSW swell with offshore winds.
- Most powerful swell: Friday 7 Aug, 2PM (local time) - 8ft (2.5m), 16s period, SSW swell with 3,402 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 5PM (local time) - 4ft (1.2m), 17s 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 Friday (Jul 31) at 5PM. The primary swell is predicted to be 1.2m and 17s period with a secondary swell of 1.0m and 13s. Another secondary swell of 0.9m and 6s is also forecast. 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 16s and forecast to arrive on Friday (Aug 07) at 2PM. 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 Thursday (Aug 06) at 5AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Fri 31st Jul) | 4ft (1.2m) 17s |
| Best Surf | 8PM (Fri 31st Jul) | 5ft (1.6m) 17s |
| Most Powerful | 2PM (Fri 7th Aug) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Downtowns over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming our way.
Right off the bat, we’ve got a solid run of surf on the cards. The first real action kicks off on Friday the 31st of July, and it’s looking like a long, pumping stretch all the way through to mid-August. The standout spot is gonna be Downtowns (reef). Water temp is sitting right on 80.1°, which is pretty much spot on for this time of year, so nothing weird going on there.
We start things off on Friday morning the 31st with a clean 4.3ft SSW swell, a long 17-second period, and a light southerly cross breeze. The afternoon cleans right up with a glassy SE wind and 3.9ft, still that long-period groundswell. The energy is already strong, reading 1312 to 1495 (combined energy). It’s a solid start.
Saturday the 1st of August sees the swell building. The morning is a little onshore with a 4.6ft SSW swell, but the afternoon is the pick: glassy conditions with a 5.6ft SSW swell, 17-second period, and the energy cranking up to 1660. Definitely a session for the more experienced crew.
Sunday the 2nd of August pumps again. The morning has a bit of cross-onshore wind with 6.6ft, but the afternoon is glassy, same size, and the energy is over 2000. That’s proper wave energy. The 6.6ft mark is getting big, so it’s not for beginners, but it’s a ripper for those who know what they’re doing.
Monday the 3rd and Tuesday the 4th of August keep the fun going. Both mornings are glassy, 5.6ft, with that long-period SSW swell. The waves are clean, powerful, and consistent. This is the kind of week you take a sick day for.
Now, the real standout is shaping up for Thursday the 6th of August. The afternoon is looking mint: offshore wind from the east, 7.2ft SSW swell, 16-second period, and the energy is 2663. That’s a serious amount of water moving. Clean, lined-up waves for the experienced.
Then we get a spike of proper power on Tuesday the 11th of August. The morning session has a 11.5ft SSW swell, 18-second period – that’s a very long period groundswell – and the energy is a massive 6657. That’s getting into big-wave territory. This is for experts only. The reef at Downtowns should handle it well, but it’s going to be a heavy, serious paddle out. The afternoon stays big at 11.5ft.
The last week of the outlook keeps the swell in the 6.6ft to 11.5ft range, but the winds become more variable with cross-shore and cross-onshore breezes. The 13th of August afternoon has another 11.5ft pulse with a 17-second period and 6226 energy, but the wind is a bit more messy. Still, there’s plenty of push.
Overall, the best windows are the afternoons of Saturday the 1st, Sunday the 2nd, and Thursday the 6th of August, with the Thursday the 6th afternoon being the absolute standout for clean, powerful waves. The Tuesday the 11th morning is for the big-wave crew only.
Remember, a 17-second period means those lulls between sets are longer, so you’ll have time to get out, but the waves will be packing a punch.
Hang loose, and I’ll see you in the water.
Short Range ForecastMostly dry. Warm (max 26°C on Fri morning, min 22°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Wed afternoon, min 22°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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 17 | SW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SW 16 | SSW 14 | SW 15 | SSW 19 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||||
1009 | 854 | 1155 | 957 | 1626 | 1817 | 2027 | 2051 | 1928 | 1297 | 1279 | 1314 | 1244 | 1159 | 669 | 1142 | 1088 | 2811 | 2964 | 2663 | 2419 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-off | cross-on | glassy | off | cross-on | glassy | glassy | glassy | glassy | off | glassy | cross | off | cross | cross-off | cross-off | cross | off | cross-off |
High Tide | 11:23AM1.68m | 00:54AM1.25m | 11:57AM1.63m | 1:15AM1.32m | 12:32PM1.53m | 1:38AM1.39m | 1:10PM1.40m | 2:02AM1.45m | 1:52PM1.23m | 2:31AM1.50m | 2:45PM1.05m | 3:06AM1.53m | 4:13PM0.87m | 3:54AM1.55m | |||||||
Low Tide | 6:31PM0.18m | 5:56AM0.75m | 6:52PM0.24m | 6:37AM0.71m | 7:12PM0.33m | 7:20AM0.68m | 7:31PM0.43m | 8:10AM0.64m | 7:49PM0.54m | 9:09AM0.61m | 8:04PM0.64m | 10:29AM0.57m | 8:13PM0.74m | ||||||||
6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | |
— | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 24 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 24 | 26 | 27 | 24 | 27 | 28 | 24 |
Feels °C | 28 | 27 | 26 | 27 | 27 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 29 | 27 | 26 | 27 | 27 | 25 | 28 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 14 | SW 15 | SSW 19 | SSW 17 | SSW 16 | SSW 16 |
1009 | 854 | 1155 | 957 | 1626 | 1817 | 2027 | 2051 | 1928 | 1297 | 1279 | 1314 | 1244 | 1159 | 581 | 1142 | 1088 | 2811 | 2964 | 2663 | 2419 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SE 6 | SW 19 | SE 6 | SE 6 | SE 6 | — | SE 7 | SE 7 | SE 7 | — | SE 6 | — | SW 16 | SE 6 | SW 20 | — | SE 6 | — | — |
434 | 326 | 31 | 384 | 34 | 19 | 12 | — | 47 | 39 | 44 | — | 31 | — | 669 | 29 | 586 | — | 39 | — | — | |
Swell 3 Height (m) Direction Period (s) | SE 7 | SW 22 | — | SE 6 | — | — | — | — | W 15 | — | — | — | — | — | SE 6 | SW 22 | — | — | — | — | — |
52 | 73 | — | 16 | — | — | — | — | 5 | — | — | — | — | — | 24 | 229 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | ESE 6 | SE 6 | SE 6 | SE 6 | SE 7 | SE 6 | SE 6 | SE 6 | ESE 7 | ESE 7 | ESE 7 | SE 7 | SE 6 | SE 6 | ESE 6 | SE 6 | SE 6 | SE 5 | ESE 6 | SE 5 | SE 5 |
141 | 59 | 91 | 56 | 100 | 61 | 38 | 30 | 127 | 131 | 123 | 44 | 80 | 30 | 71 | 88 | 50 | 32 | 106 | 43 | 31 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 0 | 0 | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 4 | 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.











