Surf Forecasts:
Hilisataro surf forecast from 25 Aug 2026:
- Best quality surf: Thursday 27 Aug, 10AM (local time) - 3.5ft (1.0m), 19s period, SW swell with glassy winds.
- Most powerful swell: Monday 31 Aug, 10PM (local time) - 6.5ft (2.0m), 18s period, SW swell with 2,354 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 1AM (local time) - 5ft (1.6m), 14s period with SSW 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 26) at 1AM. The primary swell is predicted to be 1.6m and 14s period with a secondary swell of 0.3m 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 2.0m 18s and forecast to arrive on Monday (Aug 31) at 10PM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Wed 26th Aug) | 5ft (1.6m) 14s |
| Best Surf | 10AM (Thu 27th Aug) | 3.5ft (1.0m) 19s |
| Most Powerful | 10PM (Mon 31st Aug) | 6.5ft (2.0m) 18s |
Table - best surf conditions forecast for Hilisataro over the next 16 days.
The Lowdown
Alright, let’s break it down for Hilisataro in feet and miles.
First couple of days, Tuesday and Wednesday – skip 'em. There’s some swell around the 5 to 6 foot range from the SSW, but the wind is messy, cross-shore or onshore, and there’s thunderstorm risk. The energy’s there, but the surface is chopped up. Not worth it.
Thursday the 27th of August – that’s a real bright spot. Morning session is a gem. 3 to 4 feet of SW groundswell, but it’s a 19-second period – that’s a long, powerful pulse. The combined energy is strong (1434). Wind is dead calm – glassy. The water temp is about 86°, pretty normal for the season. At a reef break, that long period will draw clean, rippable lines. It’s an advanced wave and crowds are sometimes an issue, but for Thursday morning, it’s the best of the first week.
Friday the 28th brings a bigger pulse – around 6 to 7 feet of SSW swell, 16-second period, but the wind turns onshore. The energy is huge (2057), but the wind’s gonna mess it up. Fine for kite surfers, less so for a paddle session.
Monday the 31st of August afternoon glass-off is a beauty. 6 feet of SW swell, 18-second period, glassy surface, and a massive 2147 energy reading. That’s a proper expert session.
Now, Tuesday the 1st of September morning – that’s the one you want. 7 feet of SW groundswell, 16-second period, glassy, and a combined energy of 2330. That’s a solid, powerful, clean wave at an advanced reef. Beginners stay on the beach. It’s a long-range call, but if the forecast holds, that’s your session.
The period from the 2nd to the 6th of September keeps clean mornings with 4 to 6 feet of SW swell, periods around 14 to 16 seconds. Consistent, fun, manageable. The energy is moderate, in the 900 to 1500 range.
After the 6th, it drops. By the 8th of September, we’re looking at 2 to 3 feet of very long-period swell (21-22 seconds), but the size is too small for much. The afternoon of the 8th has a glassy 3-foot wave – could be a longboard special if the tide lines up.
So, first week is slow with Thursday the 27th morning as the clean standout. The big one is Tuesday the 1st of September morning for experts. The second week holds clean fun waves, then fades away.
Rusty.
Short Range ForecastHeavy rain (total 33mm), heaviest during Tue night. Warm (max 28°C on Wed morning, min 26°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Sat night. Warm (max 28°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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 15 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SW 16 | SW 19 | SW 19 | SW 17 | SSW 16 | SW 16 | SW 15 | SW 14 | SSW 14 | SSW 13 | SW 21 | SW 19 | SW 19 | SW 18 | SW 18 | SW 17 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1292 | 1208 | 982 | 768 | 590 | 539 | 738 | 891 | 2212 | 2032 | 1651 | 940 | 752 | 672 | 472 | 527 | 825 | 984 | 1628 | 1901 | 2327 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | off | cross | cross-off | glassy | cross-on | glassy | on | on | glassy | on | cross-on | glassy | glassy | cross | glassy | cross-on | glassy | glassy |
High Tide | 5:11PM0.46m | 5:17AM0.76m | 5:42PM0.53m | 5:48AM0.81m | 6:11PM0.61m | 6:17AM0.84m | 6:39PM0.68m | 6:45AM0.85m | 7:08PM0.74m | 7:13AM0.84m | 7:38PM0.79m | 7:42AM0.80m | 8:09PM0.81m | ||||||||
Low Tide | 10:29PM0.18m | 11:58AM0.13m | 11:10PM0.14m | 12:17PM0.09m | 11:47PM0.11m | 12:38PM0.06m | 00:22AM0.08m | 1:00PM0.03m | 00:56AM0.07m | 1:23PM0.02m | 1:32AM0.07m | 1:48PM0.01m | 2:08AM0.09m | ||||||||
 | |  | | |  | |  |  | | |  | | | | | | | | | | |
 | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | 6:34 | — | — | 6:34 | — | — | 6:34 | — | — | 6:32 | — | — | 6:32 | — | — | 6:32 | — | — | 6:31 | — |
mm | 3 | 6 | 15 | 2 | 1 | 4 | 2 | — | — | — | — | — | — | 2 | 4 | 1 | 1 | 1 | 3 | 1 | — |
Temp °C | 27 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 27 |
Feels °C | 30 | 30 | 30 | 33 | 31 | 31 | 32 | 31 | 31 | 32 | 31 | 31 | 32 | 32 | 31 | 32 | 32 | 32 | 31 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SW 16 | SW 15 | SW 14 | SW 17 | SSW 16 | SW 16 | SW 15 | SW 14 | SSW 14 | SSW 13 | SW 13 | SSW 13 | SW 19 | SW 18 | SW 18 | SW 17 |
| kJ | 1292 | 1208 | 982 | 768 | 590 | 539 | 438 | 606 | 2212 | 2032 | 1651 | 940 | 752 | 672 | 472 | 400 | 378 | 984 | 1628 | 1901 | 2327 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 9 | WNW 8 | WNW 8 | S 7 | SSW 12 | SW 19 | SW 19 | WNW 11 | WNW 10 | S 7 | S 8 | S 7 | S 8 | S 8 | SW 21 | SW 19 | SSW 12 | S 12 | S 10 | S 9 |
| kJ | 13 | 15 | 13 | 11 | 23 | 254 | 738 | 891 | 11 | 20 | 40 | 43 | 40 | 46 | 45 | 527 | 825 | 350 | 172 | 175 | 104 |
Swell 3 Height (m) Direction Period (s) | W 18 | W 18 | SW 20 | W 11 | SW 18 | SW 21 | SSW 12 | S 8 | WNW 7 | W 16 | WNW 10 | WNW 9 | SSW 18 | WNW 9 | WNW 9 | S 7 | WNW 9 | WNW 9 | SW 12 | SW 12 | WNW 9 |
| kJ | 6 | 6 | 15 | 2 | 81 | 117 | 258 | 29 | 5 | 5 | 19 | 17 | 61 | 17 | 15 | 39 | 16 | 16 | 71 | 71 | 15 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 76 | 167 | 0 | 0 | 18 | 0 | 0 | 76 | 0 | 26 | 76 | 0 | 26 | 76 | 0 | 0 | 76 | 0 | 76 | 0 | 0 |
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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