
Surf Forecasts:
Lagundri-The Machine surf forecast from 26 Jul 2026:
- Best quality surf: Friday 31 Jul, 1AM (local time) - 3.5ft (1.1m), 18s period, SW swell with glassy winds.
- Most powerful swell: Saturday 1 Aug, 1PM (local time) - 5ft (1.5m), 17s period, SW swell with 1,320 kJ wave energy.
- Next surfable swell (1★+): Monday 27 Jul, 7AM (local time) - 3.5ft (1.0m), 10s period with S swell.
Best Forecast Surf Conditions for Lagundri-The Machine this week:
The surf forecast for Lagundri-The Machine over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Jul 27) at 7AM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.6m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Lagundri-The Machine in the next 16 days are 1.5m 17s and forecast to arrive on Saturday (Aug 01) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 27th Jul) | 3.5ft (1.0m) 10s |
| Best Surf | 1AM (Fri 31st Jul) | 3.5ft (1.1m) 18s |
| Most Powerful | 1PM (Sat 1st Aug) | 5ft (1.5m) 17s |
Table - best surf conditions forecast for Lagundri-The Machine over the next 16 days.
The Lowdown
Alright, Rusty here, and we’re looking at the same stretch of coast, just in feet and miles per hour.
The first few days are a waiting game. From Monday the 27th of July through the end of the month, the swell is small, like 3 feet or less, and the wind is light but cross-onshore with thunderstorms around. The energy is moderate, but the surf is marginal. Not much to get excited about.
Friday the 31st of July has a nice afternoon glass off. The wind goes calm, and the swell is around 4 feet from the S/SW with a 16-second period. That’s a long-period groundswell that will wrap into the reef nicely. The energy is moderate (862), but the clean conditions make it a fun little session.
Saturday the 1st of August is still a bit messy with cross-shore wind, but the swell holds at 4 feet from the SW, period 17 seconds, and the energy is starting to get strong (1249). Still waiting for the perfect moment.
Sunday the 2nd of August – that’s the real start of the run. The morning glass is dead calm, and the swell is 4 feet from the SW, 16 seconds, with strong energy (1418). The forecast says “expect very good surf conditions,” and I’m all in. Clean, glassy, and the reef will love that long period.
Monday the 3rd of August keeps the energy up with a 5-foot SSW swell, long period, glassy conditions again. The energy is strong (1178). Get it early before the afternoon wind picks up.
The big standout is the stretch from the 4th through the 7th of August. Tuesday the 4th sees the afternoon swell jump to 6 feet from the SSW, 16 seconds, with very strong energy (1547) and a clean cross-off breeze. The reef is going to be pumping. Wednesday the 5th is similar at 5 feet, clean. But Thursday the 6th of August is the real gem. The morning brings a 6-foot SW swell with an 18-second period, glassy, and the energy is powerful (2050). That’s “excellent surf conditions for experienced surfers.” The afternoon is just as good: 6 feet from the SSW, 17 seconds, glassy, with massive energy (2117). This is the best day of the whole forecast. Friday the 7th keeps it rolling with a 6-foot SSW swell, calm glass, and very strong energy (1937). The crowd can be “sometimes” busy here, but for this quality, it’s fine.
The second week sees the swell get bigger but the wind gets a bit rougher. The 8th and 9th of August have a 5 to 6-foot SSW swell with a 16-19 second period, but the cross-onshore wind makes the surface choppy. The energy is huge (up to 3059), but the ride will be bumpy.
Monday the 10th of August is a late highlight. Morning glass with a 8-foot SSW swell, 17 seconds, and massive energy (3026). That’s big, powerful, and clean – for experts only. The afternoon gets a bit choppy.
Tuesday the 11th of August wraps it up with a clean, glassy morning, 6-foot SSW swell, 15 seconds, and strong energy (1381).
The standout days are the morning of Sunday the 2nd, and the whole of Thursday the 6th of August. If you can only surf one, make it Thursday the 6th.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Mon morning. Warm (max 28°C on Wed morning, min 26°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Thu night. Warm (max 28°C on Thu morning, min 26°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | |||||||||||||||
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) | S 10 | S 10 | S 11 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SSW 14 | SW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 17 | SW 17 | SW 16 | SW 16 | SSW 18 | SSW 16 |
Wave Graph | |||||||||||||||||||||
194 | 151 | 143 | 255 | 183 | 266 | 314 | 309 | 347 | 546 | 649 | 694 | 663 | 589 | 728 | 1050 | 1038 | 897 | 783 | 794 | 1170 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | glassy | cross-on | glassy | glassy | glassy | on | glassy | cross | cross-on | glassy | cross | glassy | glassy | cross | on | glassy | glassy | cross-on | cross |
High Tide | 4:52AM0.69m | 5:18PM0.39m | 5:31AM0.73m | 5:54PM0.44m | 6:05AM0.78m | 6:27PM0.49m | 6:37AM0.81m | 6:58PM0.54m | 7:06AM0.82m | 7:29PM0.59m | 7:34AM0.82m | 8:00PM0.63m | 8:01AM0.79m | 8:33PM0.66m | |||||||
Low Tide | 11:56AM0.14m | 10:31PM0.14m | 12:21PM0.11m | 11:13PM0.11m | 12:46PM0.09m | 11:52PM0.10m | 1:10PM0.07m | 00:28AM0.09m | 1:34PM0.06m | 1:03AM0.10m | 1:58PM0.05m | 1:38AM0.11m | 2:23PM0.05m | 2:15AM0.14m | |||||||
6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | |
— | 6:39 | — | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — | |
mm | 5 | 1 | 5 | 1 | 1 | 1 | — | 1 | 1 | — | 1 | 5 | — | 1 | 2 | — | — | 9 | 1 | 1 | 9 |
Temp °C | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 27 |
Feels °C | 31 | 30 | 31 | 31 | 31 | 32 | 32 | 32 | 31 | 31 | 32 | 31 | 31 | 33 | 31 | 32 | 31 | 31 | 32 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | S 11 | S 11 | S 10 | SW 15 | SW 15 | SW 15 | SSW 14 | SSW 14 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 17 | SW 17 | SW 16 | SW 16 | SSW 18 | SSW 16 |
194 | 151 | 143 | 114 | 106 | 266 | 314 | 309 | 347 | 318 | 649 | 694 | 663 | 589 | 728 | 1050 | 1038 | 897 | 783 | 794 | 1170 | |
Swell 2 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 13 | SW 16 | SW 15 | S 10 | S 9 | S 9 | SW 20 | SW 19 | SW 13 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | WNW 9 | S 11 | SSW 20 | SW 15 | S 9 |
132 | 132 | 132 | 255 | 183 | 108 | 64 | 60 | 331 | 546 | 253 | 286 | 282 | 222 | 115 | 147 | 48 | 82 | 596 | 485 | 57 | |
Swell 3 Height (m) Direction Period (s) | SW 17 | SW 17 | SW 16 | SW 12 | SW 12 | SW 11 | SW 11 | SW 22 | S 8 | S 8 | S 8 | WNW 10 | WNW 10 | WNW 10 | SW 20 | WNW 10 | SSW 11 | WNW 8 | S 9 | S 8 | WNW 9 |
98 | 147 | 127 | 71 | 69 | 63 | 30 | 163 | 52 | 34 | 32 | 54 | 54 | 51 | 186 | 52 | 46 | 26 | 39 | 52 | 26 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 13 | 64 | 0 | 13 | 0 | 0 | 0 | 64 | 0 | 13 | 64 | 0 | 13 | 0 | 0 | 13 | 64 | 0 | 0 | 1 | 1 |
Best forecast wave conditions in Nias | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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Information about the Lagundri-The Machine Surf forecast
The above surf forecast table for Lagundri-The Machine provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Lagundri-The Machine can be found by selecting the local surf guide option on the grey menu. Our Lagundri-The Machine 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 (Lagundri-The Machine) 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 Lagundri-The Machine 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 Nias? If you are looking for accommodation near Lagundri-The Machine, camping, hotels and holiday cottages in Nias, consider staying in Afia which is 91 km (57 miles) away.










