
Surf Forecasts:
Periscope Point surf forecast from 18 Jul 2026:
- Best quality surf: Monday 20 Jul, 5PM (local time) - 6.5ft (2.0m), 17s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 20 Jul, 5PM (local time) - 6.5ft (2.0m), 17s period, SSW swell with 2,269 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 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 Sunday (Jul 19) at 2AM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 1.0m and 6s. 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 2.0m 17s and forecast to arrive on Monday (Jul 20) 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 1.4m 6s period and expected on Tuesday (Jul 21) at 2AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 19th Jul) | 4.5ft (1.4m) 14s |
| Best Surf | 5PM (Mon 20th Jul) | 6.5ft (2.0m) 17s |
| Most Powerful | 5PM (Mon 20th Jul) | 6.5ft (2.0m) 17s |
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 south swell on the way for Periscope Point, but you’ve got to be patient and pick your windows. This is an advanced reef break that’s inconsistent and sheltered, so don’t expect a wall of waves every day – when it fires, it’s a gem, but you’ll need to read the tides carefully.
The first real standout arrives on Monday, 20th July. Monday afternoon sees a nice 7ft SSW groundswell pushing in with a long 17-second period, and the combined wave energy is pumping hard at 2332. Winds are a light SSE breeze, cross-off, meaning it'll be clean for the experienced crew. This is a proper session for advanced surfers only – that size at a reef is no joke. The water temp is about average for this time of year, nothing unusual.
Tuesday the 21st still has some size, with a 6ft SW swell in the morning (energy at 1453) and a 6ft SSW in the afternoon (1118), but there's rain showers around early. Winds stay cross-off and manageable, but the conditions are marginal with the tide. Not the top pick, but worth a look if you missed Monday.
There's a bit of a lull midweek, with smaller 3ft to 4ft swell from the 22nd through the 25th. The energy drops to around 500-700 range, and while it's clean with light winds, the waves are ordinary. I’d save your energy.
Things start to lift again at the end of the month. Thursday, 30th July, brings a long-period SSW swell – 3ft morning building to 4ft in the afternoon, but the period hits 20 seconds and the energy climbs to 1336. That’s some serious groundswell pulse, and with gentle cross-off winds, it’s a real sleeper for the reef. For the experienced, this could be a glassy, clean session with long lines.
Friday the 31st carries on the good run, with 4ft SW swell at 18 seconds and energies well over 1100. Same gentle cross-off breeze. These two days are the second standout window – smaller in size but the quality is there.
Now, looking into the first week of August, there’s a bigger pulse on the radar. Saturday the 1st of August sees a 7ft to 7ft SW groundswell with an 17-18 second period, and the combined energy jumps to 2941 – that’s strong. Problem is, winds pick up to a moderate ESE breeze, 16 mph in the morning. That’s cross-off, but the conditions are marginal with the tide and it’s getting big. This is expert territory only.
Sunday the 2nd of August is the real highlight of the long-range. The swell holds at 7ft to 7ft from the SW, period still a solid 15-16 seconds, and the energy is over 2000. By the afternoon, the wind drops to a gentle 9 mph SE breeze, making it as clean as it gets for a big swell at this reef. The guidance calls it excellent conditions for experienced surfers – and I agree. It’s a promising one, but it’s over a week away, so keep an eye on it.
Monday the 3rd of August still has good size at 6ft SW, but the period shortens to 14 seconds, and it’s looking more marginal. Still worth a paddle if the swell sticks.
Overall: Monday 20th July afternoon is the first proper standout, and Sunday 2nd August afternoon is the long-range gem. In between, the 30th and 31st of July offer quality, smaller waves for the patient. Crowds are only sometimes an issue here, but an inconsistent reef like this can get a little busy when it’s good.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Warm (max 28°C on Sun afternoon, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Tue night. Warm (max 27°C on Fri 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 13 | SW 15 | SSW 17 | SSW 16 | SW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 16 |
Wave Graph | |||||||||||||||||||
810 | 656 | 569 | 560 | 1088 | 2269 | 1956 | 1377 | 1111 | 908 | 590 | 451 | 465 | 553 | 419 | 431 | 362 | 295 | 291 | |
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 | 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 |
High Tide | 1:16AM2.77m | 1:16PM2.72m | 1:52AM2.76m | 1:56PM2.46m | 2:28AM2.68m | 2:36PM2.18m | 3:06AM2.56m | 3:22PM1.91m | 3:48AM2.41m | 4:27PM1.68m | 4:46AM2.27m | 6:29PM1.56m | |||||||
Low Tide | 7:16AM0.59m | 7:32PM0.36m | 8:00AM0.68m | 8:03PM0.56m | 8:45AM0.80m | 8:33PM0.78m | 9:36AM0.94m | 9:04PM1.00m | 10:39AM1.06m | 9:39PM1.20m | 12:16PM1.11m | 10:37PM1.38m | |||||||
— | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | |
6:01 | — | 6:01 | — | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — | |
mm | — | — | — | 1 | — | — | 3 | 2 | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 26 | 28 | 24 | 26 | 27 | 24 | 25 | 26 | 24 | 26 | 26 | 24 | 26 | 26 | 24 | 26 | 27 | 24 |
Feels °C | 26 | 26 | 28 | 25 | 26 | 28 | 26 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 24 | 25 | 25 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 13 | SW 13 | SW 15 | SSW 17 | SSW 16 | SW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSE 7 | SSW 13 | SSW 13 | SSE 8 |
810 | 656 | 569 | 560 | 1088 | 2269 | 1956 | 1377 | 1111 | 908 | 590 | 451 | 465 | 553 | 419 | 143 | 362 | 295 | 220 | |
Swell 2 Height (m) Direction Period (s) | SSE 6 | SW 22 | SSE 7 | SSE 7 | SW 18 | E 6 | SE 6 | SSE 6 | S 20 | — | SSW 18 | SW 16 | SSE 6 | SW 19 | S 7 | SSW 14 | SSW 18 | SSE 7 | SSW 12 |
85 | 20 | 85 | 91 | 727 | 34 | 89 | 45 | 7 | — | 31 | 66 | 60 | 15 | 72 | 431 | 32 | 79 | 199 | |
Swell 3 Height (m) Direction Period (s) | — | E 6 | E 6 | SSW 19 | SSE 6 | SSE 6 | E 6 | E 6 | — | — | E 6 | SW 16 | E 6 | E 6 | E 6 | SW 18 | SSW 18 | E 6 | SSW 16 |
— | 32 | 64 | 475 | 44 | 29 | 26 | 31 | — | — | 23 | 66 | 60 | 32 | 22 | 12 | 32 | 22 | 291 | |
Wind waves Height (m) Direction Period (s) | E 6 | ESE 6 | SE 7 | E 7 | E 6 | — | SE 6 | SE 6 | SSE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SSE 6 | E 6 | SE 6 | SE 6 | E 6 |
52 | 111 | 215 | 104 | 46 | — | 137 | 116 | 105 | 115 | 108 | 142 | 132 | 112 | 121 | 47 | 101 | 116 | 92 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 2 | 172 | 0 | 2 | 0 | 0 | 179 | 179 | 172 | 179 | 179 | 0 | 179 | 179 | 2 | 2 | 179 | 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










