Surf Forecasts:
Downtowns surf forecast from 18 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, 2AM (local time) - 4.5ft (1.4m), 14s 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 2AM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 0.9m and 6s. 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 1.7m 7s period and expected on Saturday (Jul 25) at 5AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 19th Jul) | 4.5ft (1.4m) 14s |
| 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 folks, Rusty here. Let’s talk about what’s coming up at Downtowns over the next couple of weeks. This reef setup is advanced and fairly consistent, with an optimum SW direction – and we’ve got a run of solid groundswells lined up. The window opens right now (Sunday July 19) with clean, rideable waves, but the real magic starts tomorrow.
Sunday July 19 – Morning sees a nice 4.3ft SW swell, period 14s, and light cross-off wind. Combined energy is moderate (976). It’s clean, but not huge. Afternoon the wind turns offshore, swell holds, energy dips a bit (889) – still a fun session for those who know the reef.
Monday July 20 – This is where it gets exciting. Morning delivers 6.2ft SW at 17s – that’s a long-period groundswell with strong energy (2352). The wind is gentle and cross-off, so faces will be clean. This is excellent for experienced surfers. The afternoon stays similar but with a touch more wind and a shift to SSW – still good, but the morning is the pick.
Tuesday July 21 through Thursday July 24 – Swell backs off a bit, dropping from 5.6ft to 3.3ft. Periods still decent (14-13s), but energy wanes – moderate three-digit numbers. Winds stay cross-off, but the quality fades. These days are more for the keen local who doesn’t mind smaller waves.
Friday July 25 – A little rebound. Morning 3.9ft SSW at 15s, light breeze, energy 752. Afternoon glassy offshore with ESE wind – clean and fun. Not a standout but a nice run.
Saturday July 26 – Morning has a 6.6ft SE swell, but only 8s period – short period windswell. Energy is moderate (1020). The magic here is glassy conditions – light S wind, no ripple. That’s rare. However, the short period means the reef might section. Worth a look if you’re after a glassy window. Afternoon smaller.
Sunday July 27 – Glassy again with small 3.0ft SW at 13s. Clean but tiny. Good for a longboard or a grovel.
Monday July 28 – Morning goes cross-shore, small. Afternoon picks up a bit with 3.0ft SSW at 16s, cross-off, energy 722 – clean and smooth.
Tuesday July 29 – Swell comes back up. Morning 4.3ft SSW at 15s, light breeze, energy 807. Afternoon similar with 4.3ft at 14s, energy 1053. Solid, clean, and consistent – a good day.
Wednesday July 30
Short Range ForecastMostly dry. Warm (max 28°C on Sun afternoon, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Wed afternoon, min 23°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | ||||||||||||||
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 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 |
Wave Graph  | |||||||||||||||||||
 kJ | 799 | 586 | 560 | 979 | 2238 | 2032 | 1956 | 1261 | 934 | 742 | 581 | 346 | 553 | 501 | 425 | 253 | 362 | 321 | 446 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | 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 |
High Tide | 2:24AM1.37m | 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 | |||||||||
Low Tide | 7:58AM0.71m | 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 | |||||||||
 |  |  |  | | | | | | | | | | | | | | | | |
 | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — |
 | 6:07 | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 27 | 28 | 25 | 27 | 28 | 25 | 26 | 27 | 24 | 26 | 27 | 24 | 26 | 26 | 24 | 27 | 27 | 24 |
Feels °C | 27 | 29 | 29 | 26 | 28 | 28 | 26 | 26 | 25 | 24 | 24 | 25 | 23 | 24 | 23 | 23 | 26 | 25 | 23 |
Swell 1 Height (m) Direction Period (s) | SW 14 | 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 |
| kJ | 799 | 586 | 560 | 979 | 2238 | 2032 | 1956 | 1261 | 934 | 742 | 581 | 346 | 553 | 501 | 425 | 253 | 362 | 321 | 446 |
Swell 2 Height (m) Direction Period (s) | — | SE 7 | SSW 21 | SSW 19 | — | — | — | — | S 19 | SSW 18 | — | SSW 16 | SW 19 | — | SW 18 | SSW 10 | SSW 17 | SSW 17 | SSW 13 |
| kJ | — | 99 | 170 | 470 | — | — | — | — | 7 | 32 | — | 223 | 15 | — | 12 | 85 | 96 | 246 | 206 |
Swell 3 Height (m) Direction Period (s) | — | SSW 21 | — | — | — | — | — | — | — | — | — | — | — | — | — | S 19 | SW 16 | SW 16 | WSW 18 |
| kJ | — | 44 | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 41 | 40 | 31 |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 7 | SE 7 | SE 7 | SE 7 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SSE 6 | SSE 6 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 8 |
| kJ | 66 | 247 | 159 | 131 | 114 | 124 | 78 | 80 | 109 | 83 | 105 | 135 | 109 | 113 | 125 | 155 | 142 | 145 | 236 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 4 | 4 | 0 | 4 | 4 | 0 | 4 | 4 | 0 | 4 | 4 | 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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