Surf Forecasts:
Downtowns surf forecast from 4 Sep 2026:
- Best quality surf: Saturday 5 Sep, 8PM (local time) - 7ft (2.1m), 15s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 11AM (local time) - 8ft (2.5m), 16s period, SSW swell with 3,336 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 8AM (local time) - 5.5ft (1.7m), 14s 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 Saturday (Sep 05) at 8AM. The primary swell is predicted to be 1.7m and 14s period with a secondary swell of 0.4m and 5s. 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 Wednesday (Sep 09) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Sep 05) at 5PM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sat 5th Sep) | 5.5ft (1.7m) 14s |
| Best Surf | 8PM (Sat 5th Sep) | 7ft (2.1m) 15s |
| Most Powerful | 11AM (Wed 9th Sep) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Downtowns over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s cookin’ for this spot.
We’ve got one spot on the radar, and it’s a reef setup that’s fairly consistent. The water is sitting at 80°, which is pretty much right on the money for this time of year, nothing unusual there. The pattern is a solid run of SSW to SW swell, and while there’s a bit of a cross-breeze or cross-chop hanging around for a lot of the mornings, the afternoons are where the magic happens.
The first recommendation kicks off Saturday, 5th September. The morning is a bit average with that cross-shore chop, but it’s a steady 6 ft of SSW swell. The real standout starts Saturday afternoon though, with a clean window opening up. Sunday 6th September afternoon is a gem – 5 ft of SSW swell, cross-offshore wind, and the conditions are described as clean. That’s a beauty for an experienced surfer.
Monday 7th September afternoon is another clean one with 7 ft of SSW swell, and the pattern keeps rolling. The best of the best, though? You gotta look at two sessions. First, the Saturday 12th September afternoon: glassy conditions, 5 ft of SW swell, and the energy is moderate (1579). That’s a special window. And then Sunday 13th September afternoon: 8 ft of SW swell, offshore wind, clean, and the combined energy is strong (3523). That’s the pick of the whole run for the experienced crew.
Through the second week, from the 14th to the 20th, the afternoons keep delivering with clean to glassy conditions and swell sizes from 5 ft to 7 ft. The 19th and 20th September are both glassy all day, with solid SW swell. Because this is a reef break, that long-period groundswell (periods up to 16-19 seconds) will line up beautifully. Just keep in mind, when the swell pushes over 8 ft (like on the 9th September morning at 8 ft), that’s expert territory only. The 5 ft to 7 ft range is the sweet spot for the competent surfer.
Crowds are possible here, so don’t expect to have it to yourself on those clean afternoons. The consistency is fairly solid, so there’s plenty of waves to go around.
Rusty out.
Short Range ForecastMostly dry. Warm (max 26°C on Sat morning, min 23°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Tue morning, min 23°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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 14 | SSW 16 | SSW 14 | SSW 14 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 19 | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1382 | 1743 | 1127 | 1624 | 1199 | 2325 | 1724 | 1624 | 1110 | 1410 | 2094 | 2781 | 3336 | 2751 | 2271 | 1297 | 2480 | 2290 | 2151 | 2093 | 1415 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross-off | off |
High Tide | 4:30AM1.52m | 6:28AM1.52m | 10:32PM1.09m | 7:56AM1.58m | 10:24PM1.17m | 9:00AM1.64m | 10:38PM1.28m | 9:52AM1.67m | 10:57PM1.40m | 10:38AM1.65m | 11:18PM1.51m | ||||||||||
Low Tide | 12:17PM0.42m | 2:05PM0.32m | 3:01PM0.23m | 1:30AM1.03m | 3:40PM0.17m | 2:56AM0.88m | 4:13PM0.17m | 3:49AM0.71m | 4:41PM0.20m | 4:34AM0.56m | 5:07PM0.28m | ||||||||||
 |  |  | | | | | | | | | | | | | | |  | | | | |
 | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 24 | 26 | 25 | 25 | 27 | 27 | 25 |
Feels °C | 26 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 28 | 26 | 26 | 27 | 25 | 27 | 30 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 16 | SSW 14 | SSW 14 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SW 16 | SW 15 |
| kJ | 1382 | 1743 | 1127 | 1624 | 1199 | 2325 | 1724 | 1624 | 1110 | 1306 | 1344 | 2781 | 3336 | 2751 | 2271 | 1297 | 2480 | 2290 | 2151 | 2093 | 1415 |
Swell 2 Height (m) Direction Period (s) | SSW 5 | — | SSW 17 | SSW 18 | SSW 13 | — | SW 23 | SW 22 | SW 21 | SSW 19 | SSW 18 | SSW 12 | — | — | — | SSW 18 | — | SW 26 | SSW 26 | SW 24 | SW 24 |
| kJ | 9 | — | 622 | 283 | 659 | — | 21 | 119 | 433 | 1410 | 2094 | 623 | — | — | — | 835 | — | 27 | 66 | 144 | 197 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | S 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 4 | SSE 4 | SE 5 | — | SSE 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | ESE 4 | SE 4 | ESE 4 |
| kJ | 21 | 30 | 7 | — | 29 | — | — | — | — | — | — | — | — | — | — | — | — | — | 25 | 16 | 13 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 147 | 147 | 0 | 148 | 0 | 0 | 148 | 0 | 0 | 147 | 176 | 0 | 4 | 4 | 0 | 147 | 4 | 0 | 4 | 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.
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