
Surf Forecasts:
Periscope Point surf forecast from 30 Jul 2026:
- Best quality surf: Sunday 2 Aug, 2AM (local time) - 6ft (1.8m), 18s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 6 Aug, 5PM (local time) - 8ft (2.5m), 17s period, SSW swell with 3,475 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 5AM (local time) - 4.5ft (1.3m), 14s 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 Friday (Jul 31) at 5AM. The primary swell is predicted to be 1.3m and 14s period with a secondary swell of 0.9m and 18s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Periscope Point in the next 16 days are 2.5m 17s and forecast to arrive on Thursday (Aug 06) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Friday (Jul 31) at 11AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 31st Jul) | 4.5ft (1.3m) 14s |
| Best Surf | 2AM (Sun 2nd Aug) | 6ft (1.8m) 18s |
| Most Powerful | 5PM (Thu 6th Aug) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Periscope Point over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here. Let’s get into it. We’ve got a solid run of surf on the horizon, no messing around. The standouts are obvious, so let’s ride the timeline.
The whole pattern starts with a building, long-period groundswell that locks in and stays consistent for the better part of two weeks. The first few days are clean but a touch middling for the average surfer, but from Sunday afternoon onward, things get serious. The standout window is that Sunday afternoon through the following Saturday, with the absolute best on offer being the Friday the 14th of August session. On that Friday morning, you’re looking at a clean, solid 12ft SSW swell, with a very long period of 19 seconds, and light cross-offshore winds. The combined energy is massive at 8672, so this is deep, powerful groundswell. That’s strictly for the experts. For the advanced crew ready for a big, heavy reef, that’s the one.
The weekend prior, starting Sunday the 2nd of August afternoon, is also a major highlight. That afternoon sees a clean 7ft SSW swell with a 17-second period, offshore breeze from the east at 3 mph, and the combined energy at 2102. It’s a much more manageable size for experienced surfers, and the glassy conditions will make it smooth as silk. That’s the pick of the first week.
Remember, this is Periscope Point (a reef), and it’s an inconsistent spot that only fires when the conditions are right, so when it’s on, it’s on. It’s sheltered from the swell, so that steady SSW direction is the key. The water temp is about average for the time of year, nothing unusual here. The crowds are a possibility here, so get in early.
From the 6th of August onward, the swell stays solidly in the 7ft to 8ft range, with a few days pushing 8ft to 10ft. The 11th of August shows a 10ft SSW swell with an 18-second period, but the combined energy (4940) and the fact it’s a big, powerful groundswell at a reef means it’s a serious, expert-only proposition. The 13th of August afternoon has a very long 23-second period, but the wind goes cross and it’s a bit more marginal.
The 14th and 15th of August are the grand finale, with that 12ft monster on Friday and a still-strong 10ft on Saturday, both clean and cross-offshore. After that, the run starts to fade. All in all, this is a rare, quality window for a spot that doesn’t turn on often. Get on it if you’re able.
- Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Sat afternoon, min 22°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Mon morning, min 22°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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 14 | SSW 17 | SW 17 | SSW 16 | SSW 16 | SW 16 | SSW 18 | SSW 16 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 14 | SSW 15 | SSW 19 |
Wave Graph | |||||||||||||||||||
630 | 1009 | 864 | 1184 | 945 | 1271 | 2024 | 1809 | 2102 | 1928 | 1206 | 1158 | 1190 | 1142 | 1095 | 768 | 1065 | 1174 | 3150 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | glassy | cross-off | glassy | cross-off | cross-off | off | off | cross-off | cross-off | glassy | cross-off | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 11:33PM2.44m | 11:14AM2.85m | 11:58PM2.57m | 11:45AM2.86m | 00:23AM2.68m | 12:15PM2.81m | 00:48AM2.75m | 12:45PM2.70m | 1:14AM2.79m | 1:17PM2.54m | 1:42AM2.79m | 1:52PM2.32m | 2:14AM2.74m | ||||||
Low Tide | 5:13AM0.81m | 5:44PM0.22m | 5:45AM0.71m | 6:10PM0.23m | 6:17AM0.64m | 6:34PM0.27m | 6:50AM0.60m | 6:59PM0.37m | 7:24AM0.60m | 7:25PM0.49m | 8:02AM0.64m | 7:52PM0.66m | |||||||
— | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
6:04 | — | 6:04 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 26 | 27 | 23 | 27 | 28 | 24 | 28 | 28 | 24 | 28 | 28 | 24 | 28 | 28 | 24 | 27 | 27 | 24 |
Feels °C | 25 | 26 | 28 | 24 | 28 | 29 | 27 | 29 | 29 | 26 | 30 | 29 | 26 | 30 | 30 | 26 | 28 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 17 | SW 17 | SSW 16 | SSW 16 | SW 16 | SSW 18 | SSW 16 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 14 | SSW 15 | SSW 19 |
630 | 1009 | 864 | 1184 | 945 | 1271 | 2024 | 1809 | 2102 | 1928 | 1206 | 1158 | 1190 | 1142 | 1095 | 768 | 1065 | 1174 | 3150 | |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SSW 13 | SSW 13 | SW 22 | SW 19 | SSW 20 | — | — | — | SE 7 | SSE 6 | SE 7 | SSE 6 | SE 6 | SE 5 | SW 16 | SE 5 | SW 21 | SE 5 |
572 | 299 | 269 | 118 | 546 | 151 | — | — | — | 37 | 13 | 36 | 15 | 32 | 14 | 610 | 16 | 458 | 48 | |
Swell 3 Height (m) Direction Period (s) | SSE 6 | SW 24 | SW 22 | SW 22 | SSE 6 | — | — | — | — | — | — | — | E 6 | — | — | SW 24 | SSW 22 | E 4 | — |
38 | 22 | 73 | 118 | 13 | — | — | — | — | — | — | — | 1 | — | — | 22 | 186 | 4 | — | |
Wind waves Height (m) Direction Period (s) | E 6 | ESE 6 | SE 6 | SE 6 | E 4 | ESE 4 | ESE 6 | ESE 7 | ESE 4 | ESE 4 | ESE 5 | ESE 5 | E 4 | — | — | SE 6 | E 4 | SE 5 | — |
41 | 90 | 47 | 28 | 9 | 28 | 33 | 30 | 20 | 25 | 46 | 36 | 10 | — | — | 26 | 6 | 19 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 |
Best forecast wave conditions in Sumbawa | |||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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











