
Surf Forecasts:
Downtowns surf forecast from 30 Jul 2026:
- Best quality surf: Friday 31 Jul, 8AM (local time) - 4.5ft (1.3m), 17s period, SSW swell with offshore winds.
- Most powerful swell: Friday 7 Aug, 8AM (local time) - 8ft (2.4m), 17s period, SSW swell with 3,354 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 5AM (local time) - 3.5ft (1.1m), 18s 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 5AM. The primary swell is predicted to be 1.1m and 18s period with a secondary swell of 1.2m and 14s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Downtowns in the next 16 days are 2.4m 17s and forecast to arrive on Friday (Aug 07) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Friday (Jul 31) at 5AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 31st Jul) | 3.5ft (1.1m) 18s |
| Best Surf | 8AM (Fri 31st Jul) | 4.5ft (1.3m) 17s |
| Most Powerful | 8AM (Fri 7th Aug) | 8ft (2.4m) 17s |
Table - best surf conditions forecast for Downtowns over the next 16 days.
The Lowdown
G’day, Rusty here. Well, we’ve got a solid run of surf coming up at Downtowns, starting this Friday morning the 31st of July and rolling all the way through the 16-day window. This is a reef break that’s fairly exposed to the south-west swell, and it’s a fairly consistent setup, so we’re in for a good stretch.
The water temp is sitting at 80.1°, which is pretty normal for this time of year, so no need to worry about a wetsuit.
Let’s kick off with the first few days. Friday morning the 31st sees a 4.3ft swell from the SSW with a long 17-second period, but the wind is a light cross-shore from the south at 3 mph, and the energy is moderate (1635). The wave comment flags it as marginal due to tide, so it’s a bit of a wait-and-see. Friday afternoon, though, things clean right up – the wind swings to the ESE at 6 mph and goes glassy. The swell drops slightly to 3.9ft from the SW with the same 17-second period, and the energy is still solid (1319). The data says “expect very good surf conditions,” so that afternoon session is a nice little warm-up.
Saturday the 1st of August morning is a bit messy with a light cross-on breeze from the SSW at 6 mph, 4.6ft of SSW swell, 16-second period, and moderate energy (1417). The afternoon is the real standout for the first week: glassy conditions with a 3 mph breeze from the ESE, and the swell bumps up to 5.6ft from the SSW, 17-second period, with strong energy (1660). The forecast says “excellent surf conditions for experienced surfers,” and with that glassy surface, it’ll be clean and lined up. This is your best bet for the early days.
Sunday the 2nd of August morning sees the swell hit 6.6ft from the SSW, 16-second period, and strong energy (2039), but the wind is a light cross-on from the SSW at 3 mph. The afternoon is the pick: glassy again with the same ESE breeze at 3 mph, 6.6ft of SSW swell, still a 16-second period, and strong energy (2079). Excellent conditions for experienced surfers – that’s a top session.
Monday the 3rd of August keeps the good run going. Both morning and afternoon are glassy with 5.6ft of SSW swell, 15-second period, and moderate energy (around 1320-1344). Solid, clean, fun waves. Tuesday the 4th and Wednesday the 5th get a bit more wind, but Wednesday afternoon the 5th is a highlight: the wind goes offshore from the ESE at 6 mph, 5.6ft of SSW swell, 15-second period, and strong energy (1721). Clean waves for the experienced crew.
Now, Thursday the 6th of August is a standout. Morning sees 7.2ft of SSW swell, 17-second period, very strong energy (2966), and a clean cross-offshore breeze from the SSE at 9 mph. The data says “excellent surf conditions for experienced surfers.” That’s a big, powerful, clean swell – a proper day for the advanced crew. The afternoon is still clean but a bit more wind.
From Friday the 7th of August through to the end of the first week, the swell holds in the 7.2ft to 8.2ft range, mostly SSW, with periods around 16-17 seconds. The winds are cross or cross-off, so it’s not perfect glass, but strong energy (2300-3504) keeps it interesting. The data flags these as marginal due to tide and wind, but there’s still plenty of push.
The second week brings a new pulse. Sunday the 9th of August morning has 7.9ft from the SSW, 17-second period, and very strong energy (3073) with a light cross-shore. The afternoon gets a bit messy with a 12 mph cross-breeze, but the energy is massive (4206). Tuesday the 11th of August morning sees 8.2ft from the SSW, 17-second period, and the highest energy of the run so far (4255), but the cross-shore wind keeps it from being pristine.
The big one lands on Thursday the 13th of August. Morning: 9.8ft of SSW swell, an 18-second period, and massive energy (5690). Afternoon: 11.5ft of SSW swell, 18-second period, and even bigger energy (7417). This is expert territory – over 8.2ft, those are big, heavy waves. The wind is a gentle cross-shore, so it’s not glassy, but the power is undeniable. The data says “marginal surf forecast,” but for a reef break with that kind of groundswell, it
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 | SSW 15 | SSW 19 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||||
1009 | 854 | 1155 | 957 | 1626 | 1817 | 2027 | 2051 | 1928 | 1297 | 1279 | 1314 | 1244 | 1143 | 757 | 1142 | 1206 | 3019 | 2929 | 2631 | 2731 | |
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 | off | glassy | glassy | glassy | cross-on | cross | off | cross | off | cross-off | cross-off | cross-off | 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 | 25 | 26 | 27 | 24 | 27 | 28 | 24 |
Feels °C | 28 | 27 | 26 | 27 | 27 | 28 | 29 | 28 | 28 | 29 | 28 | 28 | 29 | 27 | 28 | 27 | 27 | 25 | 27 | 26 | 24 |
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 | SSW 15 | SSW 19 | SSW 17 | SSW 16 | SSW 16 |
1009 | 854 | 1155 | 957 | 1626 | 1817 | 2027 | 2051 | 1928 | 1297 | 1279 | 1314 | 1244 | 1143 | 572 | 1142 | 1206 | 3019 | 2929 | 2631 | 2731 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SE 6 | SW 19 | SE 6 | SE 6 | SE 6 | SE 5 | SE 7 | SE 7 | SE 7 | — | SE 6 | — | SW 16 | SE 6 | SSW 20 | — | SE 6 | — | — |
434 | 326 | 39 | 384 | 34 | 19 | 12 | 28 | 47 | 47 | 43 | — | 24 | — | 757 | 15 | 515 | — | 37 | — | — | |
Swell 3 Height (m) Direction Period (s) | SSE 7 | SW 22 | — | SE 6 | — | — | — | — | W 15 | — | — | — | — | — | SE 6 | SW 22 | — | — | — | — | — |
56 | 73 | — | 17 | — | — | — | — | 5 | — | — | — | — | — | 18 | 229 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | SE 6 | SE 6 | SE 7 | SE 6 | SE 6 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | SE 7 | — | SE 6 | SE 6 | SE 6 | SE 6 | SE 5 | ESE 6 | SE 5 | SE 5 |
136 | 66 | 91 | 59 | 100 | 42 | 38 | 120 | 131 | 131 | 120 | 44 | — | 30 | 47 | 56 | 50 | 34 | 99 | 42 | 30 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 0 | 0 | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 4 | 4 | 0 | 4 | 0 | 0 | 0 | 4 | 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.











