Surf Forecasts:
Nungas surf forecast from 16 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 5PM (local time) - 8ft (2.5m), 18s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 8AM (local time) - 10ft (3.0m), 17s period, SW swell with 4,715 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 5AM (local time) - 5.5ft (1.7m), 14s period with SSW swell.
Best Forecast Surf Conditions for Nungas this week:
The surf forecast for Nungas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 5AM. The primary swell is predicted to be 1.7m and 14s period with a secondary swell of 0.1m and 26s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Nungas in the next 16 days are 3.0m 17s and forecast to arrive on Thursday (Aug 20) at 8AM. Winds are predicted to be 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 Saturday (Aug 22) at 2AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 17th Aug) | 5.5ft (1.7m) 14s |
| Best Surf | 5PM (Wed 19th Aug) | 8ft (2.5m) 18s |
| Most Powerful | 8AM (Thu 20th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Nungas over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s have a look at what’s coming up at Nungas over the next couple of weeks.
We’ve got a solid run of surf on the way, and it kicks off right from the start. Monday the 17th sees clean, 5ft to 5ft SSW groundswell rolling in with a long 14-second period. Winds are light and cross-offshore from the ESE and SSE, so the lineup stays clean. The combined swell energy is around 1063 to 1029 (moderate to strong). It’s a nice gentle start to the week, well within reach for most.
Tuesday the 18th is where things step up. Swell jumps to 6ft from the SW by the afternoon, period stretching to 16 seconds, and the energy bumps way up – morning sits at 1828, afternoon at 2437. That’s moderate to strong energy and the waves will have proper power. Still cross-off breezes, clean faces. This is the standout of the first half of the week – excellent for experienced surfers.
Wednesday the 19th gets even bigger. We’re talking 8ft to 8ft SSW/SW groundswell with a whopping 18 to 19-second period. The combined energy rockets to 3615 and then 4177 – that’s very strong. This is big, powerful surf. At over 8ft, it’s only for the experts. Nungas is a reef and point setup, so those long-period swells will line up beautifully, though expect some lulls between sets. The cross-off wind keeps it clean.
Thursday the 20th holds the biggest pulse: 10ft SW groundswell in the morning, period 17 seconds, energy 4303. That’s about as serious as it gets. Only the most experienced should even think about paddling out. The afternoon drops back to 8ft but still solid.
From Friday the 21st right through the weekend, the swell stays in the 7ft to 8ft range, still SW/SSW, periods around 15 to 17 seconds. Energy stays strong – between 1945 and 3378. The winds remain favourable, mostly cross-off, but some afternoons on the 22nd and 24th go cross-shore with a slight chop. Still good for the skilled crew, but the magic of the midweek is gone.
The following week from Monday the 25th sees the swell ease back to 5ft to 5ft, with periods dropping to around 12 to 14 seconds. Energy drops into the 700 to 1000 range (moderate). Conditions stay clean with light cross-off breezes. Good for a relaxed session, nothing huge.
Then Thursday the 27th afternoon brings a nice little kick: 5ft SSW with a 16-second period, energy 1472 – that’s a surprise pulse. Clean and punchy.
Friday the 28th keeps the 7ft SSW/SW swell going with 14-second period, energy around 1786 to 1997. Light winds, clean again. Worth a look.
The last weekend, the 29th, is a bit messy with moderate breezes and a drop-off in quality. But then Sunday the 30th and Monday the 31st bring a fresh long-period SW groundswell (17 to 18 seconds) pushing 5ft to 6ft, energy in the 1890 to 2222 range – strong and clean. That’s a nice way to cap off the run, particularly for anyone who missed the earlier bigger days.
So for the standout: Wednesday the 19th and Thursday the 20th are the true heavy-hitters – big, powerful, clean, and perfect for experts at a reef and point that loves that long-period SW groundswell. Tuesday the 18th afternoon is also a beauty for the slightly smaller but still solid offering. Crowds are sometimes an issue at Nungas, so get in early during the week.
Water temp sits around average for this time of year – nothing unusual to note.
That’s the picture from here. Stay safe out there, and keep an eye on the sets.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 23°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Thu afternoon, min 23°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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 15 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SW 16 | SSW 16 | SW 19 | SSW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 |
Wave Graph | |||||||||||||||||||
1356 | 1057 | 934 | 690 | 726 | 1672 | 1953 | 3604 | 4177 | 4484 | 4241 | 3808 | 2687 | 2233 | 3378 | 2964 | 3113 | 2663 | 2155 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross | off |
High Tide | 00:40AM3.00m | 12:51PM2.71m | 1:09AM2.95m | 1:23PM2.47m | 1:38AM2.82m | 1:54PM2.20m | 2:06AM2.64m | 2:24PM1.94m | 2:36AM2.43m | 3:00PM1.67m | 3:16AM2.22m | 4:44PM1.45m | 4:45AM2.03m | ||||||
Low Tide | 6:52AM0.36m | 6:54PM0.37m | 7:27AM0.45m | 7:19PM0.55m | 8:02AM0.61m | 7:43PM0.75m | 8:39AM0.81m | 8:04PM0.96m | 9:26AM1.02m | 8:22PM1.18m | 10:48AM1.19m | 8:25PM1.38m | |||||||
— | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
6:05 | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 27 | 28 | 24 | 28 | 28 | 24 | 28 | 28 | 25 | 27 | 28 | 24 | 27 | 28 | 24 | 27 | 27 | 24 |
Feels °C | 26 | 28 | 29 | 27 | 29 | 29 | 26 | 29 | 29 | 27 | 28 | 28 | 26 | 28 | 27 | 25 | 28 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SW 16 | SSW 16 | SW 19 | SSW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 |
1356 | 1057 | 934 | 690 | 726 | 1672 | 1953 | 3604 | 4177 | 4484 | 4241 | 3808 | 2687 | 2233 | 3378 | 2964 | 3113 | 2663 | 2155 | |
Swell 2 Height (m) Direction Period (s) | — | SE 5 | SSW 20 | SSW 18 | SW 13 | SW 21 | SW 20 | SE 7 | — | — | SE 7 | — | SSE 6 | SSE 6 | E 5 | SSE 6 | — | — | SE 5 |
— | 6 | 38 | 214 | 444 | 756 | 881 | 11 | — | — | 62 | — | 54 | 33 | 21 | 47 | — | — | 25 | |
Swell 3 Height (m) Direction Period (s) | — | — | SSW 24 | SW 23 | SW 21 | SE 6 | SE 6 | — | — | — | — | — | — | — | — | — | — | — | SSW 23 |
— | — | 57 | 264 | 658 | 9 | 18 | — | — | — | — | — | — | — | — | — | — | — | 53 | |
Wind waves Height (m) Direction Period (s) | — | ESE 4 | ESE 4 | — | E 5 | ESE 5 | E 4 | ESE 4 | — | ESE 5 | — | — | E 6 | ESE 5 | ESE 5 | ESE 6 | — | — | — |
— | 16 | 15 | — | 61 | 28 | 9 | 20 | — | 24 | — | — | 50 | 42 | 36 | 87 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 177 | 0 | 0 |
Best forecast wave conditions in Sumbawa | |||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||
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Information about the Nungas Surf forecast
The above surf forecast table for Nungas provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nungas can be found by selecting the local surf guide option on the grey menu. Our Nungas 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 (Nungas) 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 Nungas 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.
Are you planning a holiday in Sumbawa? If you are looking for accommodation near Nungas, camping, hotels and holiday cottages in Sumbawa, consider staying in Bima which is 52 km (32 miles) away. Alternatively, find information about places to stay and car hire in Raba which is 56 km (35 miles) away











