Surf Forecasts:
Periscope Point surf forecast from 15 Aug 2026:
- Best quality surf: Saturday 15 Aug, 8PM (local time) - 7ft (2.1m), 17s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 19 Aug, 11PM (local time) - 10ft (3.0m), 17s period, SW swell with 4,660 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 8PM (local time) - 7ft (2.1m), 17s period with SSW swell.
Best Forecast Surf Conditions for Periscope Point this week:
The surf forecast for Periscope Point over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 15) at 8PM. The primary swell is predicted to be 2.1m and 17s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Periscope Point in the next 16 days are 3.0m 17s and forecast to arrive on Wednesday (Aug 19) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Friday (Aug 21) at 5AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sat 15th Aug) | 7ft (2.1m) 17s |
| Best Surf | 8PM (Sat 15th Aug) | 7ft (2.1m) 17s |
| Most Powerful | 11PM (Wed 19th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Periscope Point over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about what’s on the menu at Periscope Point. This is a sheltered reef break that only really kicks when the swell lines up from the south-west. It’s an advanced wave, and it’s inconsistent – it doesn’t fire every day, but when it does, it’s special.
The action starts Saturday afternoon, August 15th. Some clouds overhead, a light SSE breeze holding a cross-off, keeping the surface clean. Swell is 7ft out of the south-southwest, with a long 17-second period – proper groundswell. The energy is strong, and the water is warm at 80°, about normal for this time of year.
Sunday the 16th keeps the quality high. Both morning and afternoon see 7ft SSW swell, period easing to 16 seconds. The wind stays cross-off and light. It’s still a big, powerful wave.
Monday the 17th the swell drops a touch – 5ft in the morning, 5ft in the afternoon – but the 14-second period gives it shape. The winds stay favourable.
The standout window is Tuesday the 18th afternoon. Swell bumps back to 6ft SSW, 16-second period, and the combined energy jumps to 2401. Light SSE breeze means clean, lined-up waves. This is the best early call. Wednesday the 19th goes bigger: 8ft to 8ft SW swell, periods up to 19 seconds. Energy hits 3949 on Wednesday afternoon. This is serious, expert-only territory when it gets over 8ft.
Thursday the 20th morning is the peak: 10ft SSW swell, 16-second period, combined energy at 4169. Wind stays a gentle cross-off. The afternoon picks up a moderate breeze, so morning is the window. Experts only.
The swell holds through Friday the 21st around 7ft to 7ft SW. The wind gets a bit stronger in the afternoon (12 mph), but the swell direction is still good. Crowds are possible here when it’s firing.
Heading into the second week, the swell drops. Saturday the 22nd still has a good 8ft SSW swell and clean conditions. Sunday the 23rd holds 6ft SW. From Monday the 24th to Wednesday the 26th, it’s in the 4ft to 5ft range, with 13 to 14-second periods. It’s still surfable, just smaller.
A second push arrives Thursday the 27th afternoon – 5ft SW swell with a very long 19-second period, energy building to 2327. That trends into Friday the 28th: 8ft SW in the morning, 8ft in the afternoon, periods of 17 to 16 seconds, and energy in the 3000s. The wind is light and cross-off. That Friday looks like the other big standout, though it’s far out.
The run fades into August 29th and 30th with smaller 4ft to 6ft SW swell. The morning of the 30th has a remarkable 21-second period – very long groundswell. It can make the wave break straight at a reef point, but for this sheltered spot, it could line up beautifully, just with longer waits between sets.
Best bets are Tuesday the 18th through Thursday the 20th, and then Friday the 28th. Warm water, clean winds, and all for the experienced crew. If you’re good to go, you’ve got some crackers ahead.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Sat afternoon, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Thu afternoon, min 23°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SW 14 | SSW 14 | SW 16 | SW 16 | SSW 16 | SW 19 | SW 18 | SW 17 | SW 16 | SSW 16 | SW 16 | SW 15 | SW 17 | SSW 17 |
Wave Graph | ||||||||||||||||||||
2377 | 2303 | 1899 | 1875 | 1432 | 1057 | 834 | 607 | 786 | 1523 | 1953 | 3565 | 3913 | 4607 | 4126 | 3832 | 2545 | 2048 | 2715 | 3186 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | 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 | cross-off |
High Tide | 00:10AM2.97m | 12:17PM2.90m | 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 | |||||||
Low Tide | 5:58PM0.11m | 6:16AM0.33m | 6:27PM0.21m | 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 | |||||||
— | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | |
6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 24 | 28 | 28 | 24 | 28 | 28 | 24 | 28 | 28 | 24 | 28 | 28 | 24 | 28 | 29 | 24 | 27 | 28 | 24 |
Feels °C | 30 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 28 | 30 | 29 | 26 | 29 | 29 | 26 | 27 | 28 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SW 14 | SSW 14 | SW 16 | SW 16 | SSW 16 | SW 19 | SW 18 | SW 17 | SW 16 | SSW 16 | SW 16 | SW 15 | SW 17 | SSW 17 |
2377 | 2303 | 1899 | 1875 | 1432 | 1057 | 834 | 607 | 786 | 1523 | 1953 | 3565 | 3913 | 4607 | 4126 | 3832 | 2545 | 2048 | 2715 | 3186 | |
Swell 2 Height (m) Direction Period (s) | — | — | W 20 | — | — | SSE 5 | SSW 20 | SSW 18 | SW 13 | SW 21 | SW 20 | — | — | — | SE 6 | — | SSE 7 | SSE 5 | — | SE 6 |
— | — | 7 | — | — | 18 | 38 | 214 | 400 | 856 | 881 | — | — | — | 43 | — | 38 | 9 | — | 35 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SSW 24 | SW 23 | SW 21 | ESE 5 | SE 6 | — | — | — | — | — | — | E 5 | — | — |
— | — | — | — | — | — | 57 | 264 | 658 | 22 | 23 | — | — | — | — | — | — | 13 | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 6 | — | — | — | SE 5 | ESE 5 | ESE 5 | ESE 4 | ESE 4 | — | ENE 4 | ESE 5 | ESE 6 | ESE 6 | — | SE 7 | ESE 6 | SE 5 | SE 5 | ESE 6 |
20 | — | — | — | 23 | 33 | 24 | 8 | 17 | — | 11 | 20 | 36 | 49 | — | 52 | 150 | 39 | 31 | 104 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 118 | 0 | 2 | 172 | 2 |
Best forecast wave conditions in Sumbawa | ||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||
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Information about the Periscope Point Surf forecast
The above surf forecast table for Periscope Point provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Periscope Point can be found by selecting the local surf guide option on the grey menu. Our Periscope Point 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 (Periscope Point) 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 Periscope Point 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 Periscope Point, 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











