
Surf Forecasts:
Telescopes surf forecast from 18 Jul 2026:
- Best quality surf: Monday 20 Jul, 1AM (local time) - 3.5ft (1.1m), 17s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 20 Jul, 10AM (local time) - 5.5ft (1.7m), 17s period, SSW swell with 1,630 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 1AM (local time) - 3.5ft (1.1m), 17s period with S swell.
Best Forecast Surf Conditions for Telescopes this week:
The surf forecast for Telescopes over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Jul 20) at 1AM. The primary swell is predicted to be 1.1m and 17s period with a secondary swell of 0.9m and 13s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Telescopes in the next 16 days are 1.7m 17s and forecast to arrive on Monday (Jul 20) at 10AM. 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 5s period and expected on Wednesday (Jul 22) at 7AM.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 20th Jul) | 3.5ft (1.1m) 17s |
| Best Surf | 1AM (Mon 20th Jul) | 3.5ft (1.1m) 17s |
| Most Powerful | 10AM (Mon 20th Jul) | 5.5ft (1.7m) 17s |
Table - best surf conditions forecast for Telescopes over the next 16 days.
The Lowdown
Alright, let’s talk in feet and Fahrenheit. This is Rusty, and I’m looking at the upcoming stretch for Telescopes.
We’ve got a bit of a wait before the good stuff kicks in. The first few days, starting Sunday the 19th, are pretty average. You’ll see some swell around 4ft to 4ft, but it’s coming from the SSW with a cross-on wind, and the conditions are just marginal. The combined energy is in the moderate range (501-653), but it’s not clean enough to get excited about. The water temp is about average for this time of year, nothing unusual.
Now, Monday the 20th is where things start to turn. The swell jumps to 6ft from the SSW, and the period stretches to 17 seconds – that’s a proper groundswell. The wind goes offshore in the morning and then glassy in the afternoon. The combined energy is strong at 1677, and the conditions are clean and glassy. This is a standout for the whole period. It’s a reef break, consistent, and it loves a SW swell. The crowd factor is “sometimes,” so you might have a few out, but it’s worth it. The size is 6ft, so it’s solid for experienced surfers.
Tuesday and Wednesday ease off a bit, with swell around 4ft to 5ft, but the wind stays cross-offshore and clean. The energy drops to the moderate range (405-956). It’s still fun, but not as punchy as Monday.
Then we get into a bit of a lull from Thursday the 23rd through to about Monday the 27th. The swell stays around 4ft to 6ft, but the period drops to 9-11 seconds, and the wind is mostly cross-offshore. The combined energy is moderate (385-710). It’s clean, but the wave quality is more marginal. Not a standout.
But hold on – the real highlight after Monday is the very end of the period. Starting Wednesday the 29th, the swell picks up again. On Wednesday morning, the wind goes glassy with a 3ft SSW swell and a 15-second period. The energy is moderate (856). That’s a nice little reset.
Then Thursday the 30th morning sees a 4ft SSW swell with a 19-second period – that’s a very long period groundswell. The energy jumps to 1308, strong. The wind is cross-offshore and clean. This is a reef break, so those long-period swells will line up beautifully.
But the absolute best is Saturday the 1st of August and Sunday the 2nd. Saturday morning delivers 6ft from the SSW at 17 seconds, with a cross-offshore wind. The combined energy is a massive 2309. Saturday afternoon bumps to 7ft. Sunday morning is 6ft with offshore wind, and Sunday afternoon is 6ft with glassy conditions. The energy is between 1592 and 2318. This is powerful, long-period groundswell, and it’s going to be absolutely pumping at this reef. It’s only for experts at that size, but for those who can handle it, it’s the best of the lot.
Monday the 3rd of August still has solid 6ft swell with a 16-second period and clean conditions, energy at 2024.
So, the standouts are Monday the 20th of July for the first week, and then Saturday the 1st of August through to Monday the 3rd of August for the second week. The second week is a bit more of a long-range call, but the setup looks promising. The rest of the time is clean but smaller or less consistent.
Rusty.
Short Range ForecastHeavy rain (total 34mm), heaviest during Sat night. Warm (max 28°C on Sat night, min 27°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 31mm), heaviest during Tue night. Warm (max 28°C on Wed morning, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | |||||||||||||||
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 13 | SW 13 | S 17 | SSW 17 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 |
Wave Graph | |||||||||||||||||||||
458 | 388 | 734 | 1630 | 1393 | 1193 | 899 | 778 | 490 | 390 | 238 | 213 | 531 | 588 | 550 | 573 | 500 | 408 | 343 | 373 | 277 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | off | glassy | 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 | 9:38AM1.10m | 10:22PM1.00m | 10:19AM0.97m | 11:10PM0.99m | 11:00AM0.83m | 00:02AM0.96m | 11:49AM0.70m | 1:01AM0.93m | 12:56PM0.60m | 2:07AM0.92m | 2:25PM0.54m | 3:13AM0.93m | 3:47PM0.54m | ||||||||
Low Tide | 3:46PM0.08m | 4:00AM0.25m | 4:18PM0.13m | 4:50AM0.33m | 4:51PM0.18m | 5:48AM0.39m | 5:28PM0.23m | 7:00AM0.43m | 6:11PM0.28m | 8:54AM0.43m | 7:08PM0.31m | 10:47AM0.37m | 8:19PM0.32m | ||||||||
6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | |
— | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | |
mm | 9 | 3 | — | — | 2 | 3 | 3 | 2 | 5 | 5 | 1 | 8 | 2 | — | 7 | — | 3 | 21 | 4 | 10 | 24 |
Temp °C | 27 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 27 |
Feels °C | 29 | 31 | 31 | 32 | 32 | 30 | 30 | 31 | 29 | 30 | 30 | 29 | 28 | 29 | 28 | 28 | 29 | 28 | 28 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SW 13 | S 17 | SSW 17 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 14 | SW 16 | SSW 13 | SW 15 | SW 15 | SW 16 | SW 15 | SW 14 | SW 14 |
458 | 388 | 734 | 1630 | 1393 | 1193 | 899 | 778 | 490 | 390 | 238 | 213 | 82 | 41 | 69 | 54 | 143 | 153 | 209 | 132 | 189 | |
Swell 2 Height (m) Direction Period (s) | S 7 | S 18 | SSW 13 | SSE 7 | SSE 7 | SSE 7 | W 7 | WNW 11 | S 18 | WNW 8 | S 16 | WNW 10 | WNW 10 | WNW 11 | SW 16 | SW 18 | S 18 | S 17 | S 16 | S 15 | W 8 |
38 | 225 | 290 | 42 | 43 | 30 | 1 | 11 | 56 | 7 | 46 | 21 | 21 | 22 | 66 | 49 | 57 | 135 | 122 | 115 | 6 | |
Swell 3 Height (m) Direction Period (s) | WNW 7 | S 7 | S 7 | WNW 7 | WNW 8 | WNW 7 | W 11 | S 20 | W 10 | W 10 | WNW 8 | WSW 18 | SSW 12 | SSW 15 | WNW 10 | WNW 10 | WNW 10 | W 9 | W 9 | W 9 | W 8 |
5 | 37 | 33 | 5 | 6 | 5 | 2 | 7 | 8 | 8 | 6 | 31 | 14 | 21 | 10 | 10 | 10 | 7 | 6 | 6 | 1 | |
Wind waves Height (m) Direction Period (s) | — | NNW 4 | — | — | — | — | SSE 7 | SSE 6 | SSE 7 | SSE 6 | SSE 7 | SSE 7 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 |
— | 3 | — | — | — | — | 54 | 60 | 88 | 104 | 129 | 147 | 531 | 588 | 550 | 573 | 500 | 408 | 343 | 373 | 277 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 29 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 35 | 35 | 35 | 35 | 74 | 35 | 35 | 35 | 0 | 0 |
Best forecast wave conditions in Mentawi Islands | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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Information about the Telescopes Surf forecast
The above surf forecast table for Telescopes provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Telescopes can be found by selecting the local surf guide option on the grey menu. Our Telescopes 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 (Telescopes) 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 Telescopes 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 Mentawi Islands? If you are looking for accommodation near Telescopes, camping, hotels and holiday cottages in Mentawi Islands, consider staying in Padang which is 148 km (92 miles) away.










