Surf Forecasts:
Lagundri-The Machine surf forecast from 14 Jul 2026:
- Best quality surf: Tuesday 14 Jul, 7PM (local time) - 4.5ft (1.3m), 17s period, SSW swell with glassy winds.
- Most powerful swell: Monday 20 Jul, 4PM (local time) - 5.5ft (1.7m), 16s period, SSW swell with 1,427 kJ wave energy.
- Next surfable swell (1★+): Tuesday 14 Jul, 7PM (local time) - 4.5ft (1.3m), 17s period with SSW 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 Tuesday (Jul 14) at 7PM. The primary swell is predicted to be 1.3m and 17s period with a secondary swell of 0.9m 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 1.7m 16s and forecast to arrive on Monday (Jul 20) at 4PM. 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+) | 7PM (Tue 14th Jul) | 4.5ft (1.3m) 17s |
| Best Surf | 7PM (Tue 14th Jul) | 4.5ft (1.3m) 17s |
| Most Powerful | 4PM (Mon 20th Jul) | 5.5ft (1.7m) 16s |
Table - best surf conditions forecast for Lagundri-The Machine over the next 16 days.
The Lowdown
Alright, mates, grab your boards and wax 'em up, because we’ve got a sweet run ahead at Lagundri-The-Machine. This reef break is a proper gem—sheltered from the south-west swell and known for holding long-period groundswell like a champ. Water temps are sitting at 86°F, dead normal for this time of year, so no surprises there. Crowds can show up sometimes, but with the quality on offer, it’s worth the company. Let’s dive in.
The overall pattern is a steady pulse of south-west swell running through the whole 16-day window. Most days are delivering clean, glassy conditions in the mornings, with a few afternoons turning a bit iffy due to onshore breezes. Energy levels are mostly moderate to strong, with combined swell energy values hovering between 400 and 1500. The standout windows are Wednesday the 15th and Monday the 20th—those are your golden tickets.
Tuesday the 14th starts things off with a 3ft SSW swell, 18-second period, glassy morning. Energy at 963—decent but not huge. The afternoon picks up to 4ft SW, but tide conditions are questionable, so the morning is the better call. Then Wednesday the 15th—this is the first real highlight. Morning: 5ft SSW swell, 16-second period, glassy calm, energy 1253. Afternoon: 5ft SSW, 15 seconds, still glassy. Both are “very good surf conditions.” This is a day to call in sick for. On Thursday the 16th, the swell drops a bit to 4.5ft SW, but still glassy morning with energy 830—good, not epic. Friday the 17th and Saturday the 18th bring risk of thunderstorms, but the mornings stay glassy with 4ft SW swell, energy in the 700-600 range. Still fun, but not the peak. Sunday the 19th is a little smaller at 3.5ft SW, glassy all day.
Now Monday the 20th—that’s the other big one. Morning: 5ft SSW swell, 17-second period, glassy, energy 1487. That’s the strongest energy of the whole forecast. The afternoon bumps up to 5.5ft, but with onshore wind and questionable tide, so stick to the early session. Tuesday the 21st sees the swell drop off a bit, 5ft but cross-on wind and marginal tide. Not ideal. Wednesday the 22nd is even smaller, 3.5ft, with cross-onshore. Thursday the 23rd is ordinary—2.5ft in the morning, 3.5ft in the afternoon but short 10-second period. Glassy though. Friday the 24th similar: 3ft, 10 seconds, glassy but weak. Saturday the 25th brings a welcome spike: 2.5ft but with a 16-second period, glassy morning, energy 485. That’s a nice little groundswell pulse. Sunday the 26th starts with 3.5ft SW, 14 seconds, glassy, energy 564—another solid morning. After
Short Range ForecastSome drizzle, heaviest during Thu night. Warm (max 28°C on Tue morning, min 26°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 24mm), heaviest during Sat morning. Warm (max 28°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | |||||||||||||||
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 18 | SW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 15 | SSW 15 | SW 15 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 19 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 553 | 885 | 691 | 1199 | 988 | 818 | 784 | 720 | 704 | 692 | 631 | 614 | 590 | 453 | 471 | 406 | 394 | 543 | 1294 | 1427 | 1184 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | glassy | glassy | glassy | glassy | glassy | cross-on | on | glassy | cross-on | cross-off | cross-off | off | cross-off | cross-off | cross | glassy | glassy | cross-on | glassy |
High Tide | 6:09PM0.49m | 6:28AM0.93m | 6:56PM0.53m | 7:13AM0.93m | 7:42PM0.58m | 7:56AM0.90m | 8:26PM0.62m | 8:36AM0.84m | 9:10PM0.64m | 9:13AM0.76m | 9:55PM0.65m | 9:50AM0.66m | 10:43PM0.64m | ||||||||
Low Tide | 11:36PM0.03m | 1:17PM0.01m | 00:27AM0.02m | 1:55PM0.01m | 1:15AM0.04m | 2:30PM0.02m | 2:02AM0.08m | 3:03PM0.05m | 2:49AM0.14m | 3:34PM0.08m | 3:38AM0.20m | 4:04PM0.11m | |||||||||
 | |  |  | |  | | |  |  | | | | | | | |  | | | | |
 | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — |
 | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — |
mm | — | — | — | — | — | — | — | — | 1 | 3 | 2 | 6 | 8 | — | — | 1 | 1 | 3 | 1 | — | — |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 26 | 27 | 28 | 27 | 27 | 28 | 27 |
Feels °C | 32 | 32 | 32 | 33 | 33 | 31 | 33 | 32 | 33 | 33 | 31 | 31 | 30 | 30 | 30 | 31 | 31 | 31 | 30 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | SW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 15 | SSW 15 | SW 15 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SSW 17 | SSW 16 | SSW 16 |
| kJ | 320 | 885 | 691 | 1199 | 988 | 818 | 784 | 720 | 704 | 692 | 631 | 614 | 590 | 453 | 471 | 406 | 394 | 394 | 1294 | 1427 | 1184 |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SSW 11 | SSW 11 | W 10 | WNW 9 | WNW 9 | WNW 8 | WNW 9 | WNW 8 | W 8 | S 8 | W 8 | S 7 | S 7 | WNW 8 | SSE 8 | SSE 8 | SSW 19 | WNW 8 | WNW 8 | WNW 8 |
| kJ | 553 | 343 | 153 | 48 | 49 | 45 | 41 | 42 | 39 | 33 | 36 | 33 | 28 | 27 | 21 | 22 | 21 | 543 | 25 | 39 | 94 |
Swell 3 Height (m) Direction Period (s) | WNW 11 | WNW 10 | SSW 13 | W 17 | W 11 | W 11 | W 16 | W 11 | SSE 9 | S 9 | W 8 | S 8 | WNW 8 | WNW 8 | S 8 | WNW 7 | WNW 7 | SSE 7 | SSE 8 | W 9 | S 7 |
| kJ | 90 | 85 | 192 | 6 | 2 | 2 | 5 | 3 | 26 | 39 | 33 | 33 | 20 | 19 | 21 | 18 | 18 | 18 | 19 | 7 | 16 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 13 | 64 | 0 | 0 | 0 | 0 | 0 | 167 | 13 | 0 | 167 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 64 | 0 |
Best forecast wave conditions in Nias | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Lagundri-The Machine surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest