Surf Forecasts:
Downtowns surf forecast from 15 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 8PM (local time) - 8ft (2.5m), 17s period, SW swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 2AM (local time) - 10ft (3.0m), 17s period, SW swell with 4,484 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 5PM (local time) - 7ft (2.2m), 17s 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 (Aug 15) at 5PM. The primary swell is predicted to be 2.2m and 17s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Downtowns in the next 16 days are 3.0m 17s and forecast to arrive on Thursday (Aug 20) at 2AM. Winds are predicted to be 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 Saturday (Aug 22) at 2AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Sat 15th Aug) | 7ft (2.2m) 17s |
| Best Surf | 8PM (Wed 19th Aug) | 8ft (2.5m) 17s |
| Most Powerful | 2AM (Thu 20th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Downtowns over the next 16 days.
The Lowdown
Alright folks, Rusty here. We’ve got a solid run of surf on the way at Downtowns. The pattern locks in from this Saturday and keeps delivering for over a week. The water temp is about 80°, which is pretty standard for this time of year, nothing unusual there.
We kick off Saturday the 15th with a nice 7ft SSW groundswell (17-second period). The combined energy reading is 2929, so the ocean has got some proper grunt. Winds are glassy from the SSE in the morning and SE in the afternoon. This is excellent, clean surf for experienced crew. The swell direction (SSW) is right on the optimum for this spot. This Saturday is a standout – proper, clean, powerful waves. Get amongst it if you can handle 7ft.
Sunday the 16th starts a bit cross-on, but the afternoon cleans right up with glassy ESE winds and 6ft SSW swell. Very good surf conditions. Monday the 17th stays glassy with smaller 5ft and 5ft SSW swell – easier, cleaner waves for a wider range of surfers. Still good.
Tuesday the 18th picks up again. Morning glass with 4ft SSW swell, but the afternoon cranks with 5ft SW swell and combined energy of 2431. Wednesday the 19th is the big highlight – 8ft and 8ft SSW/SW groundswell with a long 18-second period, glassy winds. Energy is 3615 and 3825. This is top-tier, powerful stuff for experts only. A true standout day.
Thursday the 20th holds solid at 8ft SW (16 seconds) with glassy conditions all day – energy still well into the 3000s. Another cracker. Friday the 21st has a tricky cross-shore morning, but the afternoon turns offshore from the ESE with a 8ft SW swell. Clean, excellent for experts.
The following weekend (Sat 22nd to Sun 23rd) has clean glassy conditions, with swell easing from 7ft down to 5ft. Still very good, much more manageable for intermediate surfers. By Monday 24th and Tuesday 25th, the swell drops to 4ft and 4ft, but the 17-second period on Monday means there’s still some energy (1285) and clean waves. Wednesday 26th is weaker, with lower energy and cross winds. Not a write-off, just a little messy.
Then things fire up again late in the window. Thursday 27th afternoon brings a 6ft SSW groundswell with a long 18-second period and clean winds – combined energy jumps to 2635. Friday 28th gets big again, 8ft SSW, but the cross-shore winds make it a bit choppy. Still a powerful swell for those who don’t mind some texture.
The very end of the outlook (Aug 29-30) shows more solid SW swell, with the 30th seeing 8ft SW and moderate cross-off winds but combined energy climbing to 4475 – that’s a lot of water moving. A bit raw, but the afternoon on the 30th cleans up nicely for a late surf.
Overall, the best of the window lands on this Saturday (Aug 15), Wednesday (Aug 19), and Thursday (Aug 20). That’s where you’ll find the clean, powerful, glassy conditions at Downtowns. Don’t sleep on it.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Sat afternoon, min 23°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Tue afternoon, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 16 | SW 16 | SW 16 | SSW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 17 | SSW 16 |
Wave Graph | |||||||||||||||||||||
2929 | 2758 | 2358 | 2080 | 1743 | 1191 | 947 | 763 | 599 | 897 | 1239 | 1532 | 3615 | 3796 | 4484 | 3803 | 3334 | 2513 | 1628 | 3146 | 2765 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | off | cross-on | glassy | off | glassy | glassy | cross-off | glassy | glassy | off | glassy | glassy | off | glassy | glassy | off | cross | off | off |
High Tide | 12:08PM1.64m | 00:57AM1.49m | 12:49PM1.47m | 1:23AM1.54m | 1:30PM1.29m | 1:49AM1.55m | 2:11PM1.10m | 2:16AM1.53m | 2:59PM0.93m | 2:47AM1.49m | 4:40PM0.79m | 3:27AM1.42m | 4:34AM1.36m | ||||||||
Low Tide | 6:39PM0.28m | 6:51AM0.52m | 7:01PM0.40m | 7:38AM0.50m | 7:20PM0.52m | 8:28AM0.52m | 7:34PM0.63m | 9:24AM0.56m | 7:38PM0.72m | 10:42AM0.59m | 7:02PM0.77m | 12:57PM0.57m | |||||||||
6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
— | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 25 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 24 | 26 | 27 | 25 |
Feels °C | 28 | 29 | 28 | 28 | 30 | 28 | 29 | 28 | 28 | 29 | 29 | 28 | 29 | 28 | 28 | 29 | 28 | 26 | 27 | 28 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 16 | SW 16 | SW 16 | SSW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 17 | SSW 16 |
2929 | 2758 | 2358 | 2080 | 1743 | 1191 | 947 | 763 | 599 | 897 | 1239 | 1532 | 3615 | 3796 | 4484 | 3803 | 3334 | 2513 | 1628 | 3146 | 2765 | |
Swell 2 Height (m) Direction Period (s) | — | — | SSE 6 | SE 5 | SE 5 | SE 5 | SSE 5 | SE 6 | SSW 18 | SW 13 | SW 20 | SW 19 | — | SE 6 | — | SE 6 | SE 6 | — | SSW 18 | — | SE 6 |
— | — | 6 | 25 | 14 | 15 | 19 | 36 | 408 | 400 | 1157 | 1088 | — | 29 | — | 27 | 24 | — | 874 | — | 54 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 25 | SSW 20 | SW 23 | SW 21 | SE 5 | — | — | — | — | — | — | — | SE 7 | — | — |
— | — | — | — | — | — | 25 | 38 | 266 | 658 | 35 | — | — | — | — | — | — | — | 44 | — | — | |
Wind waves Height (m) Direction Period (s) | SE 4 | SSE 5 | SE 5 | — | SE 6 | ESE 5 | SE 6 | ESE 6 | SE 5 | ESE 5 | SE 5 | SE 5 | ESE 6 | ESE 6 | SE 6 | SE 7 | ESE 6 | SE 6 | ESE 7 | SE 6 | SE 6 |
29 | 19 | 23 | — | 46 | 42 | 44 | 81 | 11 | 32 | 67 | 15 | 77 | 65 | 38 | 100 | 67 | 42 | 138 | 42 | 152 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 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.











