Surf Forecasts:
Lagundri-The Machine surf forecast from 1 Sep 2026:
- Best quality surf: Wednesday 2 Sep, 7AM (local time) - 6ft (1.9m), 16s period, SW swell with glassy winds.
- Most powerful swell: Tuesday 1 Sep, 4PM (local time) - 7ft (2.1m), 16s period, SW swell with 2,247 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 7AM (local time) - 6ft (1.9m), 16s period with SW 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 Wednesday (Sep 02) at 7AM. The primary swell is predicted to be 1.9m and 16s period with a secondary swell of 0.7m and 8s. 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 2.1m 16s and forecast to arrive on Tuesday (Sep 01) at 4PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Wed 2nd Sep) | 6ft (1.9m) 16s |
| Best Surf | 7AM (Wed 2nd Sep) | 6ft (1.9m) 16s |
| Most Powerful | 4PM (Tue 1st Sep) | 7ft (2.1m) 16s |
Table - best surf conditions forecast for Lagundri-The Machine over the next 16 days.
The Lowdown
Righto, let’s have a look at what’s cookin’ over the next couple of weeks.
Straight up, we’ve got a solid run of swell at Lagundri-The Machine. It’s a sheltered reef set-up, so it needs a decent push, and for the first week and a half, we’ve got that. The water temp is bang on average for the time of year, sittin’ at 30°, so nothin’ wild there.
The action kicks off Tuesday morning, but it’s a bit scratchy – 7ft from the SW with a 17-second period, that’s some serious groundswell energy (2848), but it’s comin’ with a cross-on breeze. That’s gonna ruffle the surface a little. By Wednesday morning, though, it cleans right up: 6ft SW, 16-second period, glassy conditions. That is pure gold. The energy’s still strong (1646) and the tide should be workin’ for ya. That Wednesday morning window is a standout – clean, solid, and consistent. Thursday morning stays glassy, swell drops a touch to 4ft but the quality’s there.
We see a bit of a lull around Friday and Saturday – smaller, choppier stuff, with energy dropping below 1000 and a cross-on wind making it messy. Not worth paddlin’ out for unless you’re desperate.
Then from Monday the 7th, it starts to rebuild. A few days of clean, glassy mornings with 3ft to 5ft SW groundswell. The real gem pops up on Tuesday afternoon the 8th – 4ft SW swell, a massive 18-second period, glassy conditions, and energy at 1119. That’s a long, lined-up groundswell. At a reef like this, that’ll produce some long, walled-up rides. Wednesday morning the 9th is another beauty: 5ft SW, 16 seconds, glass.
From the 10th through the 14th, we’ve got a sustained run of 4ft to 6ft SW groundswell, mostly clean in the mornings with glassy or offshores. The standout in this stretch is Sunday morning the 13th – 6ft SW, 17-second period, clean, and the energy is crankin’ at 1767. That’s the biggest and best looking day of the whole outlook. Sunday afternoon goes glassy with zero wind – dead flat water, perfect walls.
The second week holds up nicely. The 14th and 15th are a little smaller and more mixed, with some cross-onshore afternoon slop, but the mornings are still clean. For the 16th, a glassy morning with 5ft SW is a nice way to finish.
Overall, this is a very solid period for Lagundri-The Machine. The first week is a slow build to a clean, solid Wednesday, then a lull, then the second week delivers the real goods. The standout windows are Wednesday morning the 2nd, Tuesday afternoon the 8th, and the absolute pick: Sunday morning the 13th. That’s the one you book off. 6ft SW, 17 seconds, clean conditions, big energy – this break will be pumpin’.
Remember, it’s an advanced reef break, so watch the tide and the shallow sections. It can get pretty heavy in the best way.
Rusty.
Short Range ForecastHeavy rain (total 28mm), heaviest during Thu night. Warm (max 28°C on Tue morning, min 26°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Sat night. Warm (max 28°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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) | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 13 | SSW 13 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 15 | SSW 14 | SSW 13 |
Wave Graph | |||||||||||||||||||||
2726 | 2247 | 2017 | 1571 | 1314 | 1082 | 777 | 746 | 742 | 525 | 501 | 351 | 468 | 355 | 1194 | 788 | 674 | 808 | 544 | 400 | 277 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | glassy | on | glassy | glassy | cross | cross-off | glassy | cross-on | glassy | cross | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | glassy | glassy |
High Tide | 8:36PM0.77m | 8:34AM0.62m | 9:15PM0.75m | 9:08AM0.54m | 10:03PM0.71m | 9:48AM0.44m | 11:08PM0.67m | 10:54AM0.36m | 00:43AM0.64m | 1:26PM0.32m | 2:27AM0.67m | 3:27PM0.38m | 3:42AM0.73m | ||||||||
Low Tide | 2:07PM0.01m | 2:42AM0.12m | 2:34PM0.03m | 3:27AM0.16m | 3:05PM0.06m | 4:26AM0.22m | 3:42PM0.11m | 6:06AM0.27m | 4:34PM0.17m | 8:58AM0.25m | 6:21PM0.22m | 10:11AM0.18m | 8:38PM0.21m | ||||||||
6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | |
— | 6:32 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | |
mm | — | 1 | 3 | 1 | 1 | 5 | — | 3 | 14 | — | 1 | 4 | — | 1 | 4 | — | 1 | 7 | 2 | 2 | 9 |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 31 | 31 | 32 | 33 | 31 | 33 | 32 | 31 | 30 | 32 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 15 | S 10 | S 9 |
2726 | 2247 | 2017 | 1571 | 1314 | 1082 | 777 | 746 | 742 | 525 | 501 | 351 | 468 | 345 | 1194 | 788 | 674 | 808 | 544 | 216 | 164 | |
Swell 2 Height (m) Direction Period (s) | S 11 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 7 | S 7 | SSW 18 | SSW 17 | WNW 7 | S 9 | S 9 | S 9 | S 10 | SSW 14 | SSW 13 |
108 | 83 | 99 | 63 | 64 | 61 | 61 | 61 | 45 | 44 | 39 | 39 | 209 | 355 | 10 | 185 | 185 | 185 | 216 | 400 | 277 | |
Swell 3 Height (m) Direction Period (s) | WNW 8 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | SSW 16 | WNW 8 | WNW 8 | W 10 | WNW 8 | S 19 | WNW 9 | WNW 8 | SW 21 | SW 20 |
14 | 15 | 13 | 12 | 11 | 13 | 12 | 11 | 12 | 11 | 10 | 107 | 12 | 11 | 8 | 12 | 192 | 7 | 6 | 67 | 186 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | S 7 | SE 4 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | 39 | 7 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 13 | 64 | 64 | 0 | 64 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 13 | 13 | 13 | 13 | 167 | 0 | 0 | 0 | 0 |
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.











