Surf Forecasts:
Sixtynine surf forecast from 24 Aug 2026:
- Most powerful swell: Sunday 30 Aug, 5AM (local time) - 1ft (0.3m), 16s period, SW swell with 43 kJ wave energy.
Best Forecast Surf Conditions for Sixtynine this week:
The most powerful waves expected at Sixtynine in the next 16 days are 0.3m 16s and forecast to arrive on Sunday (Aug 30) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Monday (Aug 24) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sun 30th Aug) | 1ft (0.3m) 16s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's have a look at what's on the table for this spot.
Right off the bat, I gotta be straight with you – it's looking like a tough stretch ahead. The next couple of weeks are almost a total write-off for anything decent. We're looking at a long, dry spell with barely a ripple to get excited about. From the start of the outlook right through to the end of the first week of September, the wave energy is just pitiful, with readings bottoming out at zero or single digits. It's all "poor surf conditions" across the board, with tiny, short-period slop that's not worth paddling out for.
The first real hint of something happening isn't until Monday the 31st of August. We get a bit of a pulse in the morning – a 1 ft groundswell from the SW with a 15-second period, giving us a combined energy of 33 (moderate). The wind is a cross-shore from the NNE at 9 mph, which is okay but not clean. The swell is tiny, so it's a marginal day for the more dedicated intermediate crew.
Then things go flat again for a few more days. The only other glimmer on the horizon is much later, on Sunday the 6th of September. The afternoon brings a 1 ft swell from the SW with a very long 17-second period, pushing the combined energy up to 47 (moderate). The wind is light and onshore from the WNW, so the surface will be bumpy. That very long period (17 seconds) means it's a true groundswell, but at this size and with onshore wind, it's a tease rather than a goer.
Monday the 7th of September is similar, with a 1 ft SW groundswell (16-second period) and combined energy of 40 (moderate). The wind is onshore from the WNW at 6 mph in the morning, then cross-onshore in the afternoon. Again, it's small and messy.
The pick of a very poor bunch is Tuesday the 8th of September. The morning sees a 1 ft swell from the WNW with a 14-second period and a combined energy of 63 (moderate). The wind is light onshore from the WNW at 6 mph. The wave height is the biggest we've seen all outlook, but it's still tiny, and the wind isn't helping. It's a "standout" only because everything else is a zero.
Honestly, for the next 16 days, there's no real quality surf on offer. The energy is too weak, the swells are too small, and the winds are often wrong. This is one of those periods where you're better off doing something else. The spot is a fairly exposed setup, but it needs a proper pulse to wake up, and we're not getting one.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Mon afternoon. Warm (max 29°C on Mon morning, min 24°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Fri morning, min 24°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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) | WNW 10 | SW 14 | NW 11 | NW 10 | NE 6 | NE 6 | NNE 5 | W 11 | W 10 | SSW 16 | W 10 | N 8 | N 8 | N 7 | NE 5 | W 10 | NNE 6 | NNE 6 | NNE 6 |
Wave Graph | |||||||||||||||||||
19 | 8 | 5 | 4 | 0 | 0 | 0 | 9 | 8 | 0 | 8 | 5 | 5 | 8 | 0 | 14 | 0 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-off | cross-off | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | glassy | cross-off | cross | cross | cross-off |
High Tide | 1:48AM0.23m | 2:26PM0.69m | 2:25AM0.28m | 2:59PM0.71m | 3:00AM0.33m | 3:28PM0.72m | 3:36AM0.38m | 3:56PM0.71m | 4:12AM0.43m | 4:24PM0.68m | 4:50AM0.48m | 4:52PM0.63m | |||||||
Low Tide | 9:13PM0.10m | 7:02AM0.04m | 9:33PM0.09m | 7:49AM0.01m | 9:53PM0.07m | 8:30AM0.00m | 10:13PM0.05m | 9:11AM0.01m | 10:35PM0.03m | 9:51AM0.02m | 10:57PM0.01m | 10:34AM0.05m | 11:20PM-0.01m | ||||||
— | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | |
6:45 | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | |
mm | — | — | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 29 | 28 | 28 | 29 | 29 | 26 | 27 | 27 | 25 | 27 | 27 | 26 | 28 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 31 | 33 | 32 | 32 | 31 | 32 | 28 | 29 | 30 | 26 | 29 | 30 | 29 | 30 | 30 | 28 | 28 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | NNE 6 | NE 6 | NE 6 | NE 5 | NE 6 | NE 6 | NNE 5 | SSW 15 | SSW 17 | NNE 5 | SSW 16 | NNE 5 | SSW 15 | NNE 5 | NE 5 | SSW 13 | NNE 6 | NNE 6 | NNE 6 |
46 | 43 | 66 | 30 | 39 | 51 | 23 | 21 | 27 | 16 | 24 | 33 | 42 | 16 | 30 | 34 | 41 | 65 | 35 | |
Swell 2 Height (m) Direction Period (s) | WNW 10 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 14 | SSW 11 | SSW 14 | SSW 13 | SSW 12 | SSW 15 | N 8 | N 7 | NNE 7 | W 10 | SSW 13 | SSW 12 | SSW 17 |
19 | 18 | 35 | 32 | 30 | 14 | 21 | 12 | 18 | 17 | 15 | 44 | 5 | 8 | 9 | 7 | 16 | 15 | 27 | |
Swell 3 Height (m) Direction Period (s) | SSW 14 | SW 14 | NW 11 | NW 10 | SSW 16 | SSW 16 | SSW 12 | W 11 | W 10 | SSW 16 | W 10 | N 8 | W 9 | SSW 14 | SSW 13 | SW 19 | ENE 7 | E 13 | E 13 |
20 | 8 | 5 | 4 | 25 | 24 | 14 | 9 | 8 | 25 | 8 | 5 | 2 | 39 | 18 | 14 | 5 | 14 | 13 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NE 5 | NNE 6 | — | NNE 5 | — | NNE 5 | — | — | NNE 6 | — | — | — |
— | — | — | — | — | — | — | 28 | 40 | — | 22 | — | 17 | — | — | 49 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 29 | 94 | 38 | 42 | 38 | 97 | 38 | 46 | 46 | 38 | 94 | 42 | 38 | 94 | 94 | 41 | 94 | 38 | 42 |
Best forecast wave conditions in Big Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Sixtynine Surf forecast
The above surf forecast table for Sixtynine provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sixtynine can be found by selecting the local surf guide option on the grey menu. Our Sixtynine 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 (Sixtynine) 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 Sixtynine 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.
Sixtynine is 84 km (52 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.











