
Surf Forecasts:
Periscope Point surf forecast from 8 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 5PM (local time) - 5.5ft (1.7m), 18s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 13 Sep, 5PM (local time) - 7.5ft (2.3m), 18s period, SW swell with 3,297 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 5PM (local time) - 5.5ft (1.7m), 18s 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 Tuesday (Sep 08) at 5PM. The primary swell is predicted to be 1.7m and 18s period with a secondary swell of 2.1m and 13s. 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 2.3m 18s and forecast to arrive on Sunday (Sep 13) 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 1.3m 6s period and expected on Monday (Sep 14) at 2AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Tue 8th Sep) | 5.5ft (1.7m) 18s |
| Best Surf | 5PM (Tue 8th Sep) | 5.5ft (1.7m) 18s |
| Most Powerful | 5PM (Sun 13th Sep) | 7.5ft (2.3m) 18s |
Table - best surf conditions forecast for Periscope Point over the next 16 days.
The Lowdown
Alright folks, Rusty here. We’ve got a solid run of swell lined up for Periscope Point, but this is no beginner’s playground. This setup is a sheltered reef break that only works on a southerly swell, and the water is sitting at a pretty typical 80°, so nothing unusual for this time of year.
The action kicks off this Tuesday morning, September 8th. We’re looking at a solid 6ft SSW groundswell, with a strong period of 13 seconds, packing a lot of grunt (combined energy of 2435). The wind is a gentle cross-offshore breeze, keeping the faces clean. This is excellent surf, but at this size and over a reef, it’s strictly for the experienced crew. The afternoon holds similar quality with a slightly smaller 6ft, but the swell period bumps up to a very long 18 seconds, which is classic groundswell. That longer period will shape up beautifully at this point, but expect longer lulls between sets.
Wednesday the 9th is the standout of this first week. Morning sees the swell jump to 8ft from the SSW with a period of 16 seconds. That’s a serious amount of energy (3278) and it’s right in the optimum direction for this spot. The wind stays light and cross-offshore. This is powerful, clean, and well overhead. It’s going to be a ripper for the experts. The afternoon holds the same size with a bit more breeze, but still clean.
Thursday the 10th eases a touch to 6ft in the morning and then builds back to 7ft in the afternoon from the SW. The wind is consistent, and the swell period stays long. We get another solid pulse Friday morning the 11th at 7ft from the SW, with light winds. Friday afternoon drops an inch and shifts to “very good” rather than “excellent”.
The weekend sees a slight dip. Saturday the 12th starts at 5ft but drops off into the afternoon with a shorter period of 14 seconds. It’s still clean but the energy fades (1397). Sunday the 13th brings a powerful rebound: the afternoon pumps up to a strong 8ft from the SW with an 18-second period, cranking out a massive 3988 combined energy. That is a serious spike, but the crowd factor here is “sometimes,” so you might have a few locals out for that one. Keep your eyes peeled.
The following week from Monday 14th through to Wednesday 16th looks more average. Swell holds around 6ft to 6ft but the ratings drop off to “marginal” or just “very good.” The wind is still cross-off, so it’s not blown out, but the magic is a bit diluted. Seek out the early mornings for the cleanest conditions.
The real highlight of the whole 16-day window is the final weekend. Saturday 19th September is a smaller day at 5ft, but then we get a massive long-range pulse arriving on Tuesday 22nd. Tuesday morning shows a 4ft swell, but look at the period – a staggering 21 seconds! That is an incredibly long groundswell (3132 energy), and it will pour in with perfect lines at this point. The wind is a gentle cross-off. Tuesday afternoon spikes again to 7ft from the SSW with a 17-second period and even lighter winds. That’s a promise of some of the best, most lined-up waves of the forecast. Wednesday the 23rd keeps the energy high with a 7ft SSW swell.
This is a long-range call, so less certain, but if that 21-second pulse lines up, it’s going to be the session to wait for. Remember, long period swells like that are not ideal for beach breaks, but on a reef point like this, they are absolute gold.
Stay safe out there.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Warm (max 29°C on Thu afternoon, min 24°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 30°C on Sat afternoon, min 24°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | SSW 20 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SW 17 | SSW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 20 | SW 18 | SW 18 | SW 16 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||||
1264 | 1779 | 2204 | 3278 | 3074 | 2441 | 1550 | 2621 | 2450 | 2093 | 1884 | 1547 | 1124 | 833 | 1350 | 2011 | 3297 | 2193 | 1787 | 1742 | 1456 | |
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 | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | off |
High Tide | 9:10PM2.05m | 8:42AM2.54m | 9:42PM2.36m | 9:32AM2.75m | 10:11PM2.65m | 10:13AM2.89m | 10:40PM2.88m | 10:50AM2.94m | 11:08PM3.05m | 11:23AM2.91m | 11:35PM3.12m | 11:54AM2.80m | 00:01AM3.11m | ||||||||
Low Tide | 2:44PM0.71m | 2:37AM1.19m | 3:25PM0.50m | 3:28AM0.86m | 3:59PM0.34m | 4:09AM0.57m | 4:30PM0.25m | 4:45AM0.34m | 4:58PM0.22m | 5:19AM0.19m | 5:26PM0.25m | 5:51AM0.14m | 5:51PM0.33m | ||||||||
6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
— | 6:04 | — | — | 6:04 | — | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — | |
mm | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 25 | 28 | 28 | 25 | 28 | 29 | 25 | 26 | 28 | 25 | 29 | 30 | 25 | 28 | 28 | 25 | 28 | 28 | 25 |
Feels °C | 30 | 29 | 28 | 30 | 29 | 28 | 29 | 30 | 27 | 28 | 29 | 29 | 31 | 30 | 28 | 29 | 28 | 27 | 29 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SW 17 | SSW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 15 | SW 18 | SW 18 | SW 16 | SW 16 | SW 16 | SW 15 |
1264 | 1465 | 2204 | 3278 | 3074 | 2441 | 1550 | 2621 | 2450 | 2093 | 1884 | 1547 | 1124 | 833 | 844 | 2011 | 3297 | 2193 | 1787 | 1742 | 1456 | |
Swell 2 Height (m) Direction Period (s) | SSW 20 | SSW 18 | SSW 13 | — | — | SSE 4 | SW 18 | — | SW 27 | SSE 5 | SW 24 | SE 5 | SW 21 | SW 21 | SW 20 | SW 14 | SSW 14 | SE 6 | SSE 6 | — | SSE 6 |
1171 | 1779 | 1208 | — | — | 15 | 642 | — | 29 | 14 | 91 | 30 | 548 | 548 | 1350 | 598 | 691 | 82 | 24 | — | 27 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SSE 4 | — | SW 28 | E 5 | — | SW 24 | SE 6 | SSW 9 | — | SE 5 | — | — | E 5 | — | — |
— | — | — | — | — | — | 12 | — | 30 | 8 | — | 197 | 25 | 16 | — | 29 | — | — | 13 | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | SSE 5 | — | — | SE 5 | ESE 4 | SE 4 | — | SE 5 | E 6 | SE 5 | SE 4 | SE 6 | — | — | ESE 6 | — | SE 5 | ESE 6 |
— | — | — | 24 | — | — | 17 | 8 | 29 | — | 13 | 5 | 29 | 20 | 46 | — | — | 100 | — | 31 | 100 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 118 | 0 | 5 | 0 | 0 | 179 | 118 | 0 |
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










