Surf Forecasts:
Downtowns surf forecast from 19 Jul 2026:
- Best quality surf: Monday 20 Jul, 2AM (local time) - 5ft (1.5m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 20 Jul, 2PM (local time) - 6.5ft (2.0m), 17s period, SSW swell with 2,351 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 2PM (local time) - 4.5ft (1.3m), 13s 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 Sunday (Jul 19) at 2PM. The primary swell is predicted to be 1.3m and 13s period with a secondary swell of 0.4m and 21s. Another secondary swell of 1.1m 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 2.0m 17s and forecast to arrive on Monday (Jul 20) 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 1.5m 7s period and expected on Saturday (Jul 25) at 5AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sun 19th Jul) | 4.5ft (1.3m) 13s |
| Best Surf | 2AM (Mon 20th Jul) | 5ft (1.5m) 15s |
| Most Powerful | 2PM (Mon 20th Jul) | 6.5ft (2.0m) 17s |
Table - best surf conditions forecast for Downtowns over the next 16 days.
The Lowdown
Alright, Rusty here again. Let's break down the same window in feet and knots.
The surf starts slow, but the first real window opens Sunday, July 19th. Morning sees a 4ft SW swell with a light cross breeze, but the afternoon is where it’s at. The wind goes offshore from the east at 6 knots, glassy. Not big, but clean.
Monday, July 20th morning is the standout. You’re looking at a 6ft SW groundswell with a long 17-second period, and a clean cross-offshore wind from the southeast at 9 knots. The combined wave energy is reading 2349 – that’s a lot of power. This is excellent for experienced surfers, and at 6ft, it’s a bit much for beginners. The swell direction is right on the money from the SW. Mark it.
Tuesday, July 21st morning still has a 6ft SSW swell, but the wind bumps up. By Wednesday, it drops off into a flat spell until the next weekend.
The next good window starts Saturday, July 26th. Early morning is glassy with a 6ft SE swell, but the period is only 8 seconds – a short-period wind swell. It’ll be a bit lumpy, but glassy winds make it work. The quality really comes back Sunday, July 27th afternoon with a 5ft SE swell and glassy conditions.
From July 29th onward, we’re in a solid run. Wednesday and Thursday, July 29th and 30th, have 5ft to 6ft SSW groundswells with 15-second periods, glassy or light offshore winds, and excellent conditions. The real gem is Thursday, July 31st morning: dead calm wind at 0 knots, glassy as a pond, with a 5ft SW groundswell at 18 seconds. The combined energy is 1419 – prime.
The absolute peak is way out on Monday, August 3rd. The morning brings a massive 12ft SSW groundswell with an 18-second period and light offshore wind. But with 6882 combined energy and surf over 8ft, this is experts only. The afternoon drops to 10ft. It’s a monster, but only for the brave.
Water temp is 81°F, about average for the season.
Crowds at Downtowns can show up sometimes, so get in early on the good days.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 28°C on Sun afternoon, min 23°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Fri morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | |||||||||||||||
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) | SW 14 | SW 13 | SW 15 | SW 17 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 586 | 560 | 979 | 2238 | 2032 | 1956 | 1261 | 934 | 742 | 581 | 346 | 553 | 501 | 494 | 413 | 357 | 329 | 446 | 610 | 594 | 352 |
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 | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off |
High Tide | 1:47PM1.40m | 2:58AM1.42m | 2:36PM1.19m | 3:34AM1.45m | 3:37PM0.99m | 4:13AM1.46m | 5:22PM0.85m | 5:00AM1.45m | 5:57AM1.44m | 7:00AM1.46m | |||||||||||
Low Tide | 8:17PM0.42m | 9:02AM0.71m | 8:39PM0.55m | 10:17AM0.70m | 8:55PM0.67m | 11:54AM0.65m | 8:59PM0.77m | 1:40PM0.56m | 2:50PM0.45m | 3:35PM0.34m | |||||||||||
 | |  | |  | | | |  | | | | | | | | | | | | | |
 | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — |
 | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 28 | 25 | 26 | 28 | 24 | 26 | 27 | 24 | 26 | 26 | 24 | 25 | 26 | 24 | 27 | 27 | 24 | 27 | 28 | 24 |
Feels °C | 29 | 29 | 26 | 26 | 28 | 24 | 26 | 26 | 24 | 25 | 24 | 23 | 23 | 23 | 23 | 25 | 25 | 24 | 27 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SW 15 | SW 17 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 16 | SSW 15 | SSW 14 | SSE 8 |
| kJ | 586 | 560 | 979 | 2238 | 2032 | 1956 | 1261 | 934 | 742 | 581 | 346 | 553 | 501 | 494 | 413 | 357 | 317 | 446 | 610 | 594 | 207 |
Swell 2 Height (m) Direction Period (s) | SE 7 | SSW 21 | SSW 19 | — | — | — | — | S 19 | SSW 18 | — | SSW 16 | SW 19 | — | SW 18 | S 20 | SSW 18 | SSW 17 | SSW 12 | SSE 8 | WSW 16 | SSW 14 |
| kJ | 93 | 170 | 470 | — | — | — | — | 7 | 32 | — | 223 | 15 | — | 12 | 8 | 123 | 329 | 196 | 138 | 25 | 352 |
Swell 3 Height (m) Direction Period (s) | SSW 21 | — | — | — | — | — | — | — | — | — | — | — | — | SW 18 | SW 18 | SW 16 | SW 16 | WSW 18 | SW 18 | WSW 16 | SW 16 |
| kJ | 44 | — | — | — | — | — | — | — | — | — | — | — | — | 12 | 12 | 41 | 40 | 30 | 12 | 25 | 41 |
Wind waves Height (m) Direction Period (s) | ESE 7 | SE 7 | SE 7 | SE 7 | SE 6 | SE 6 | SSE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SSE 6 | SSE 6 | SSE 7 | SSE 7 | SSE 6 | SSE 8 | ESE 7 | SSE 9 | SE 8 |
| kJ | 266 | 128 | 128 | 111 | 109 | 73 | 67 | 105 | 92 | 92 | 135 | 116 | 103 | 122 | 154 | 138 | 126 | 280 | 202 | 217 | 306 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 0 | 0 | 0 | 4 | 0 | 0 | 4 | 0 | 4 | 4 | 0 | 4 | 4 | 0 | 4 | 4 | 0 | 0 | 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.
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