Surf Forecasts:
Hilisataro surf forecast from 16 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 1AM (local time) - 8ft (2.4m), 19s 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★+): Monday 17 Aug, 1AM (local time) - 3ft (0.9m), 14s 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 Monday (Aug 17) at 1AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 0.8m and 10s. The wind is predicted to be glassy 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 cross-offshore at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 17th Aug) | 3ft (0.9m) 14s |
| Best Surf | 1AM (Wed 19th Aug) | 8ft (2.4m) 19s |
| Most Powerful | 10PM (Wed 19th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Hilisataro over the next 16 days.
The Lowdown
G’day, Rusty here. We’ve got a promising run of solid, clean swell on the way at Hilisataro – a reef break for the advanced crew, fairly consistent and exposed to the southwest. The water’s sitting at 86°, which is about average for this time of year, so nothing unusual there.
We kick off Sunday the 16th with a bit of a letdown – a 4ft south-swell with cross winds means it’s marginal at best. But the real action starts building through Monday and Tuesday. By Tuesday afternoon the 18th, we’ve got a 5ft SSW swell rolling in with glassy conditions and a combined energy of 2579 (moderate), and that’s when it starts to get interesting. The standout of the whole forecast is Wednesday the 19th morning: a thumping 8ft SW groundswell, period 18 seconds – that’s very long interval – with zero wind and glassy surface, energy rating 3773. This is proper reef-swell territory, not a beachie. It’ll be clean, powerful, and lined up. Experienced surfers only – this one’s for you. The afternoon pushes up to 8ft but picks up a cross breeze, so the morning is the pick.
Thursday the 20th morning keeps the magic alive: another glassy session, 8ft SSW swell, 16-second period, energy at 3397. Still excellent for the advanced crew, but the wind shifts later. Friday and Saturday drop a little in quality with onshore influences, but the surf stays around the 7ft mark – still worthwhile if you’re keen on a bigger, slightly wind-affected wave.
After a bit of a lull Sunday and Monday (24th-25th) with dropping 4ft to 5ft swell and cross-onshore breeze, things clean up again from Wednesday 26th through to Saturday 29th. These days offer smaller but glassy conditions – 3ft to 4ft SW swell, clean faces, and good for a relaxed session. The 27th afternoon (Thursday) is a real gem: 3ft SW, 15-second period, glassy, and scoring well for quality.
Then we finish strong: Sunday the 30th morning and afternoon are excellent again – 5ft SW, 18-second period, dead calm, energy 1753. Monday the 31st keeps the good run with 5ft SW, glassy, 16-second period. A solid finish to the outlook.
Crowds are sometimes an issue here, so if you can get out mid-week or early, you’ll have more room. With a long-period groundswell like this, the reef setup at Hilisataro should handle it beautifully – not too straight, just good, powerful waves. This stretch from the 19th to the 20th is the absolute best on offer.
Rusty.
Short Range ForecastHeavy rain (total 21mm), heaviest during Tue night. Warm (max 28°C on Sun afternoon, min 27°C on Sun afternoon). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 45mm), heaviest during Thu morning. Warm (max 28°C on Wed afternoon, min 23°C on Thu morning). Wind will be generally light. | |||||||||||||||||||
Sun 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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 15 | SW 14 | SW 14 | SSW 14 | SSW 18 | SSW 17 | SW 20 | SW 19 | SW 18 | SW 18 | SSW 17 | SW 16 | SSW 16 | SW 16 | SSW 15 | SW 15 | SSW 17 | SSW 16 | SSW 15 | SSW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 606 | 305 | 297 | 557 | 553 | 1081 | 1321 | 4192 | 3744 | 4355 | 4323 | 3319 | 2892 | 2291 | 1882 | 1434 | 2952 | 2257 | 1976 | 1525 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | on | cross-on | glassy | cross-on | glassy | cross-off | glassy | cross | cross-off | glassy | cross | glassy | cross-on | on | on | on | cross-on | cross-on |
High Tide | 8:42PM0.78m | 8:45AM0.74m | 9:19PM0.76m | 9:14AM0.64m | 9:56PM0.72m | 9:40AM0.55m | 10:38PM0.67m | 10:02AM0.46m | 11:31PM0.61m | 10:15AM0.38m | 00:54AM0.57m | 2:40AM0.58m | ||||||||
Low Tide | 2:34AM0.12m | 2:44PM0.06m | 3:12AM0.17m | 3:08PM0.08m | 3:51AM0.23m | 3:32PM0.11m | 4:37AM0.28m | 4:00PM0.15m | 5:48AM0.33m | 4:35PM0.19m | 5:36PM0.24m | |||||||||
 |  |  | |  |  | |  | | | | |  | | | | | | | | |
 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — |
 | 6:36 | — | — | 6:36 | — | — | 6:36 | — | — | 6:36 | — | — | 6:36 | — | — | 6:35 | — | — | 6:35 | — |
mm | — | — | — | — | 3 | 1 | 4 | 11 | 2 | 6 | 23 | 11 | — | — | — | — | 4 | 1 | — | — |
Temp °C | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 24 | 26 | 26 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 31 | 31 | 31 | 32 | 32 | 32 | 33 | 30 | 32 | 31 | 30 | 27 | 29 | 31 | 31 | 32 | 32 | 31 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | S 15 | SW 14 | SW 14 | SSW 14 | SSW 18 | SSW 17 | SSW 16 | SW 19 | SW 18 | SW 18 | SSW 17 | SW 16 | SSW 16 | SW 16 | SSW 15 | SW 15 | SSW 17 | SSW 16 | SSW 15 | SSW 14 |
| kJ | 606 | 305 | 297 | 557 | 553 | 1081 | 1321 | 4192 | 3744 | 4355 | 4323 | 3319 | 2892 | 2291 | 1882 | 1434 | 2952 | 2257 | 1976 | 1525 |
Swell 2 Height (m) Direction Period (s) | SW 15 | S 10 | S 11 | WNW 8 | SW 13 | SW 21 | SW 20 | W 8 | W 8 | W 8 | W 8 | W 8 | W 10 | S 5 | SSW 20 | SSW 19 | WNW 9 | W 8 | W 9 | WNW 8 |
| kJ | 305 | 120 | 143 | 21 | 176 | 742 | 1223 | 33 | 29 | 30 | 37 | 33 | 48 | 13 | 311 | 1044 | 25 | 36 | 39 | 23 |
Swell 3 Height (m) Direction Period (s) | WNW 9 | S 14 | WNW 8 | SW 20 | S 11 | SSW 13 | WNW 8 | S 9 | — | WSW 20 | — | — | — | WNW 9 | S 5 | S 5 | W 16 | W 10 | W 15 | SW 24 |
| kJ | 29 | 144 | 21 | 97 | 112 | 312 | 35 | 41 | — | 37 | — | — | — | 27 | 11 | 8 | 20 | 8 | 4 | 22 |
Wind waves Height (m) Direction Period (s) | — | — | SSE 3 | SSE 4 | — | — | — | — | — | — | — | WSW 8 | — | — | — | — | — | — | — | — |
| kJ | — | — | 3 | 5 | — | — | — | — | — | — | — | 45 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 167 | 0 | 26 | 167 | 0 | 26 | 0 | 0 | 0 | 18 | 0 | 0 | 10 | 0 | 26 | 76 | 26 | 26 | 76 | 76 |
Best forecast wave conditions in Nias | ||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||
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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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