Hilisataro Surf Break

Lat Long: 0.62° N 97.87° E

Hilisataro Surf Forecast and Surf Report

Issued: 6 am 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Hilisataro sea temperature is
30.0° C
0.8° 

Hilisataro surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Hilisataro surf forecast from 19 Aug 2026:

  • Best quality surf: Wednesday 19 Aug, 4PM (local time) - 8ft (2.5m), 18s period, SW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 19 Aug, 10PM (local time) - 10ft (3.0m), 17s period, SW swell with 4,607 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 19 Aug, 4PM (local time) - 8ft (2.5m), 18s period with SW swell.

Best Forecast Surf Conditions for Hilisataro this week:

The surf forecast for Hilisataro over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 4PM. The primary swell is predicted to be 2.5m and 18s period with a secondary swell of 0.5m and 8s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Hilisataro in the next 16 days are 3.0m 17s and forecast to arrive on Wednesday (Aug 19) at 10PM. Winds are predicted to be offshore at the time the swell arrives.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+) 4PM (Wed 19th Aug)8ft (2.5m) 18s
Best Surf 4PM (Wed 19th Aug)8ft (2.5m) 18s
Most Powerful10PM (Wed 19th Aug)10ft (3.0m) 17s

Table - best surf conditions forecast for Hilisataro over the next 16 days.


The Lowdown

Alright, listen up. Rusty here. We got a run of surf at Hilisataro, an advanced reef setup that breaks fairly consistent, but it ain't for the beginners. The water is 86°, which is about normal for this time of year.

The week kicks off on Wednesday the 19th with a solid pulse. Wednesday morning we're looking at a 8ft SW swell with a very long 18-second period, packing a huge amount of energy (3772). The wind is glassy out of the WNW, so conditions will be clean. This is proper groundswell with heaps of grunt. Wednesday afternoon stays good, picking up slightly to an 8ft SW swell (4421) with a light WSW cross-off breeze keeping the face smooth. This is for experienced surfers only—this size and power at a reef is no joke.

Thursday the 20th drops off a notch. The swell holds around 8ft, but the period drops to 16 seconds, and we get an ENE cross-shore in the morning swinging onshore from the SE in the afternoon. The wave quality takes a hit, so it's more of a look-and-see day for the crew who know the place.

Friday the 21st sees the swell easing to 7ft from the SSW, but Friday afternoon is a real gem. Glassy conditions with a SSE breeze, a 15-second period, and 2579 of energy. That's a window of clean, powerful waves for the dedicated few.

The weekend (Saturday 22nd and Sunday 23rd) is a mixed bag. Saturday morning has onshore wind and the swell dropping to 7ft, but the afternoon gets a light cross-on. Sunday the size is down to 6ft, with clean morning glass but cross-on wind later. Not the best, but there'll be waves for those who don't mind the wind.

Monday the 24th is a standout. The morning delivers a clean 6ft SSW swell with a 17-second period and glassy conditions out of the East. That's 1769 of energy and super clean lines. This is your call for the start of the week—early session.

The middle of the week, Tuesday 25th through to Wednesday 26th, the swell drops further into the 4ft to 6ft range with shorter periods. The quality is marginal, with onshore and cross-onshore winds, but Wednesday morning and afternoon both go glassy with a 4ft SW swell and 13-second period. A smaller, cleaner option for a more relaxed paddle.

Thursday the 27th starts with a tiny 3ft SW swell and dead calm, glassy conditions—899 energy and a 15-second period. That's a clean, fun-sized morning for the patient surfer. The afternoon picks up to 5ft but with a cross-shore wind.

Friday the 28th is another high point. Morning glass from the ESE, 5ft SW swell with a 16-second period, 1360 energy, and clean as a whistle. That's a solid session. The afternoon stays glassy with a 5ft SW swell.

The weekend of the 30th and 31st is small and inconsistent. Saturday 29th has a 4ft SW swell with glassy mornings but cross-onshore wind in the arvo. Sunday 30th drops to 2ft, not worth getting wet for. Monday 31st sees a new pulse of energy, with 7ft to 8ft SW swell and a 19-second period, but the wind is cross-onshore, so it's messy despite the power (3924 to 4266 energy).

Into the first week of September, Tuesday the 1st is a cracker. The morning is cross-onshore, but Tuesday afternoon goes glassy with a 7ft SW swell and 17-second period (2524 energy). That's excellent surf for the crew who know the reef. Wednesday the 2nd keeps the quality with a clean 5ft SW swell in the morning under glassy E winds. Thursday the 3rd is glassy all day, with a small 4ft SW swell in the morning and a 3ft SSW swell in the afternoon, both with long periods.

Overall, the two standouts are Wednesday morning 19th August for that big, powerful 8ft SW groundswell with glassy wind, and Monday morning 24th August for the clean 6ft SSW groundswell. These are the sessions to plan around. Hilisataro can get crowded sometimes, so get in early.

Rusty.

Short Range Forecast

Moderate rain (total 12mm), heaviest on Wed night. Warm (max 28°C on Wed morning, min 25°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 17mm), heaviest on Mon night. Warm (max 28°C on Sat morning, min 26°C on Sat night). Wind will be generally light.

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
5
5
3
3
4
3
4
4
3
3
3
3
2
4
4
3
3
2
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
SW
18
2.5
SW
18
3
SW
17
2.5
SW
16
2.4
SW
16
2.2
SW
16
2
SSW
15
2
SSW
15
2.2
SSW
17
2.1
SSW
16
2.1
SSW
15
1.9
SSW
14
1.7
SSW
14
1.7
SSW
14
1.5
SSW
14
1.7
SSW
17
1.3
SSW
16
1.8
SSW
16
1.7
SSW
15
1.7
SSW
14
1.3
SSW
14
Wave Graph
Metric surfscale
Energy kJ
3744
4355
4501
3319
3029
2291
1882
1907
2667
2257
2061
1525
1143
979
829
1749
875
1566
1209
1130
672
Wind (km/h)
5
WNW
10
WSW
10
N
10
ENE
10
SE
5
ESE
10
SE
5
SSE
5
S
10
SSE
10
S
5
S
5
SE
10
S
5
SSE
5
E
5
SSW
5
SSW
5
SE
5
S
5
SW
Wind State
glassy
cross-off
cross-off
cross
on
glassy
on
glassy
glassy
on
cross-on
cross-on
on
cross-on
glassy
glassy
cross
cross
on
cross-on
glassy
High Tide
10:38PM0.67m
10:02AM0.46m
11:31PM0.61m
10:15AM0.38m
00:54AM0.57m
2:40AM0.58m
3:29PM0.33m
3:53AM0.63m
4:34PM0.39m
4:41AM0.69m
5:11PM0.46m
Low Tide
3:32PM0.11m
4:37AM0.28m
4:00PM0.15m
5:48AM0.33m
4:35PM0.19m
5:36PM0.24m
11:13AM0.26m
7:54PM0.26m
11:25AM0.21m
9:34PM0.23m
11:40AM0.17m
10:29PM0.18m
thunderstorm
thunderstorm
mod rain
part cloud
part cloud
clear
part cloud
clear
part cloud
thunderstorm
clear
thunderstorm
clear
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:28
6:26
6:26
6:26
6:26
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:36
6:36
6:35
6:35
6:35
6:34
6:34
 mm
3
3
6
2
2
1
1
2
9
1
3
Temp °C
28
28
27
27
28
27
28
28
27
28
28
27
28
28
27
28
28
27
28
28
27
Feels °C
32
31
31
30
32
32
32
32
32
32
32
31
32
31
32
32
32
31
32
32
31
  • 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 Hilisataro Surf forecast

The above surf forecast table for Hilisataro provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Hilisataro can be found by selecting the local surf guide option on the grey menu. Our Hilisataro 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 (Hilisataro) 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 Hilisataro 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 Hilisataro, camping, hotels and holiday cottages in Nias, consider staying in Afia which is 92 km (57 miles) away.

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