Lagundri-The Machine Surf Break

Lat Long: 0.58° N 97.72° E

Lagundri-The Machine Surf Forecast and Surf Report

Issued: 6 am 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Lagundri-The Machine sea temperature is
29.8° C
0.6° 

Lagundri-The Machine surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Lagundri-The Machine surf forecast from 10 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 4AM (local time) - 6ft (1.8m), 19s period, SSW swell with glassy winds.
  • Most powerful swell: Tuesday 11 Aug, 4PM (local time) - 7.5ft (2.3m), 18s period, SSW swell with 3,443 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 11 Aug, 4AM (local time) - 6ft (1.8m), 19s 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 (Aug 11) at 4AM. The primary swell is predicted to be 1.8m and 19s period with a secondary swell of 1.5m 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 2.3m 18s and forecast to arrive on Tuesday (Aug 11) at 4PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Tue 11th Aug)6ft (1.8m) 19s
Best Surf 4AM (Tue 11th Aug)6ft (1.8m) 19s
Most Powerful 4PM (Tue 11th Aug)7.5ft (2.3m) 18s

Table - best surf conditions forecast for Lagundri-The Machine over the next 16 days.


The Lowdown

Alright folks, Rusty here, with a look at what we've got coming down the pipe.

We're dialled into a solid run of SSW groundswell for the next couple of weeks. The standout is Lagundri-The Machine, a classic reef break that's going to light up with plenty of size and clean conditions. The water temp is sitting right about average for this time of year, which is no surprise.

Let's get into it. The action kicks off Monday, August 10th, with some solid 6ft sets from the SSW, but that morning onshore breeze will put a bit of a bump on it. The real quality starts to show on Tuesday, August 11th. By Tuesday afternoon, the wind drops to glassy, and we're looking at 8ft of SSW groundswell with a period of 18 seconds. The energy is pumping at (3511) – that's proper power. This is an excellent window for experienced surfers. The 19-second period on Tuesday morning is incredibly long, meaning the sets will be fat and lined up, but the wind is a bit messy then.

Wednesday, August 12th, has a similar story: morning cross-on, but the afternoon goes glassy again with 6ft SSW swell. The energy is a bit lower at (1538), but still a very good session. Thursday and Friday, August 13th and 14th, are all about those glassy mornings. Thursday's morning cross-shore isn't ideal, but the afternoon goes glassy with 5ft of S swell. The real gem is Friday, August 14th, where the morning is glassy, the afternoon is dead calm, and we have a consistent 6ft SSW swell. The energy is in the moderate range (1852 and 1675), but the clean conditions will make it feel much better.

Saturday, August 15th, starts glassy in the morning with 5ft S swell, but the afternoon gets a touch of cross-on. Then we hit a bit of a lull. Sunday, August 16th, through Monday, August 17th, the swell drops off to 4ft or less and the wind is messy. The energy drops to (618-749). It’s not flat, but it’s not worth getting excited about.

Now, the swell builds again. Tuesday, August 18th, the energy comes back up (1536-2172) but the wind is cross or cross-on, making it tricky. The real show returns on Wednesday, August 19th, with a solid 8ft SSW swell, but it's cross-on which is a shame. The real standouts in the second week are Thursday, August 20th, and Friday, August 21st. Thursday brings 8ft SW swell with glassy offshore winds in the morning, and the energy is strong at (3398). Friday is even better – dead calm, glassy, with 7ft SW swell and a massive energy reading of (2816). These are serious, powerful waves for the experienced crew. After that, it slowly winds down through the weekend of August 22nd and 23rd, with the swell dropping to 7ft and cross-on winds. The run finishes strong on Monday, August 24th, with a glassy morning and 6ft SSW swell, and Tuesday, August 25th, with dead calm and 5ft SSW swell.

So, the best of the best is Thursday, August 20th, and Friday, August 21st. Those days are pure gold for the experienced surfer. The reefs will be handling the long-period energy beautifully.

Rusty.

Short Range Forecast

Heavy rain (total 37mm), heaviest during Mon night. Warm (max 28°C on Mon morning, min 26°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 45mm), heaviest during Sat night. Warm (max 28°C on Thu morning, min 25°C on Fri afternoon). Wind will be generally light.

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
3
3
3
3
3
3
3
2
3
3
3
3
3
3
2
2
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
SSW
14
1.1
SSW
22
1.6
SSW
19
1.9
SSW
19
2.3
SSW
18
2.1
SSW
17
2
SSW
17
1.8
SSW
16
1.8
SSW
16
1.4
S
13
1.4
S
12
1.6
SSW
17
1.7
SSW
16
1.7
SSW
16
1.8
SSW
15
1.5
S
14
1.5
S
13
1.3
S
13
1.3
S
12
1.3
S
15
1.4
SSW
14
Wave Graph
Metric surfscale
Energy kJ
1187
1111
1724
2530
3443
2605
2197
1537
1518
633
566
1400
1482
1358
1441
869
784
563
513
711
752
Wind (km/h)
10
SE
5
SE
5
SSE
10
SE
10
S
5
SE
10
SE
5
SSE
0
SSE
10
ESE
5
SSW
0
ENE
5
ESE
10
WNW
5
NNW
0
WSW
5
WSW
10
W
5
SW
10
SW
5
S
Wind State
cross-on
cross-on
on
cross-on
on
cross-on
cross-on
glassy
glassy
cross
glassy
glassy
glassy
cross-off
glassy
glassy
cross
cross
cross-on
cross-on
on
High Tide
4:23PM0.40m
4:45AM0.83m
5:18PM0.48m
5:33AM0.88m
6:02PM0.56m
6:16AM0.91m
6:43PM0.63m
6:56AM0.90m
7:21PM0.69m
7:32AM0.86m
7:59PM0.73m
8:06AM0.79m
8:35PM0.74m
Low Tide
11:04AM0.12m
9:43PM0.13m
11:46AM0.07m
10:46PM0.08m
12:21PM0.03m
11:39PM0.05m
12:53PM0.01m
00:25AM0.03m
1:23PM0.00m
1:08AM0.04m
1:50PM0.01m
1:49AM0.07m
2:16PM0.03m
2:29AM0.11m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
light rain
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:30
6:30
6:30
6:30
6:28
6:28
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:37
6:37
6:37
6:37
6:37
6:37
 mm
2
1
9
5
7
2
2
2
7
4
6
8
7
1
2
17
2
4
4
Temp °C
28
28
27
28
28
27
28
28
27
28
28
27
27
25
26
28
28
27
27
27
26
Feels °C
32
32
31
32
32
31
32
32
32
32
32
32
31
29
30
32
32
30
31
30
30
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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