Surf Forecasts:
Sixtynine surf forecast from 29 Aug 2026:
- Most powerful swell: Sunday 30 Aug, 2AM (local time) - 1ft (0.3m), 17s period, SW swell with 44 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 17s and forecast to arrive on Sunday (Aug 30) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Saturday (Sep 05) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 30th Aug) | 1ft (0.3m) 17s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s be straight with you. Looking at the next 16 days at Sixtynine, there’s pretty much nothing doing. The swell keeps flickering in and out, tiny as can be, and even when there’s a little bump, the wind and conditions just aren’t putting it together. It’s a long, quiet stretch.
Starting from right now, Saturday the 29th of August, you’ve got near-flat conditions. A tiny 0.3ft SW groundswell is rolling through Saturday morning, but with a cross-on breeze and low energy (12), it’s not even worth paddling out for. That little pulse fades fast, and from Saturday afternoon right through the end of August and into early September, the surf is completely flat or holding scraps under 1ft. That’s a solid 4 or 5 days of nothing.
Early in September, a few tiny swells try to show up – Monday the 31st sees another 1ft SW groundswell, but again, cross-shore wind chops it up, and the energy is weak (33). That pattern holds for days: bits of 0.7ft to 1ft W and SW swell, period all over the place from 9 to 16 seconds, but never enough juice. The water temp is around 82°, and that's about average for the time of year here – nothing weird.
The best of a bad lot comes later in the second week. Wednesday the 9th of September morning, a 1ft W swell with a 14-second period shows up, and the wind goes glassy by the afternoon. The combined energy is still low (36), but with smooth conditions, it’s the cleanest you’ll see. Then Thursday the 10th of September is glassy all day, with the same 1ft W swell holding at 12-13 seconds and energy in the 26-29 range. That’s the pick of the whole run, but frankly, it’s ankle-snappers.
By Saturday the 12th of September, a little 2ft SW swell pushes in with an 8-second period – short period, fat, and onshore wind. The combined energy hits 100, which is moderate, but the wind is on it, and the quality is poor. Still not worth getting excited about. The final days – Sunday the 13th of September – show a little 1ft SW groundswell (16-second period, 65 energy) with glassy conditions in the afternoon, but again, it’s tiny.
Honestly, if you’re desperate, the glassy windows around Wednesday 9th and Thursday 10th of September are your best chance for a clean little wave, but don’t expect much. The rest is a write-off. For the hardcore intermediate out there, this is a time to wait. The setup is so weak that kite surfers might find it more interesting than paddle surfers.
– Rusty
Short Range ForecastMostly dry. Warm (max 29°C on Mon afternoon, min 24°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Tue morning, min 25°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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) | SW 18 | NE 6 | SW 17 | NNE 7 | NNE 7 | SW 15 | SW 15 | W 12 | W 12 | W 12 | NNE 6 | W 11 | NNE 7 | W 10 | NNE 7 | W 9 | W 9 | NNE 6 | N 8 | W 12 | WNW 11 |
Wave Graph | |||||||||||||||||||||
12 | 0 | 44 | 0 | 0 | 36 | 33 | 11 | 12 | 11 | 0 | 10 | 0 | 8 | 0 | 2 | 2 | 0 | 5 | 10 | 12 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | glassy | cross-off | cross | cross | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:52PM0.63m | 5:31AM0.53m | 5:21PM0.56m | 6:15AM0.57m | 5:51PM0.48m | 7:06AM0.60m | 6:23PM0.39m | 8:06AM0.61m | 6:59PM0.30m | 9:20AM0.63m | 7:55PM0.22m | 10:42AM0.65m | 10:08PM0.17m | ||||||||
Low Tide | 10:34AM0.05m | 11:20PM-0.01m | 11:21AM0.09m | 11:45PM-0.02m | 12:16PM0.14m | 00:12AM-0.02m | 1:23PM0.19m | 00:44AM-0.01m | 2:57PM0.22m | 1:24AM0.00m | 5:16PM0.20m | 2:19AM0.02m | 7:06PM0.15m | 3:40AM0.04m | |||||||
6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 26 | 28 | 28 | 25 | 27 | 29 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 25 | 25 | 26 | 27 |
Feels °C | 30 | 30 | 27 | 29 | 30 | 26 | 28 | 29 | 29 | 28 | 28 | 27 | 30 | 29 | 29 | 28 | 27 | 24 | 25 | 25 | 28 |
Swell 1 Height (m) Direction Period (s) | NE 6 | NE 6 | NE 7 | NNE 7 | NNE 7 | NE 7 | SW 15 | NNE 8 | SSW 14 | ENE 8 | NNE 6 | NNE 8 | NNE 7 | NE 7 | NNE 7 | SSW 14 | NNE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
35 | 62 | 54 | 62 | 59 | 49 | 33 | 101 | 20 | 26 | 64 | 106 | 36 | 104 | 38 | 40 | 76 | 6 | 13 | 13 | 13 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 12 | SW 17 | SSW 16 | SSW 15 | SW 15 | W 11 | SSW 14 | W 12 | SSW 18 | ENE 8 | SSW 16 | ENE 8 | SSW 15 | NE 8 | W 9 | SSW 14 | NE 7 | N 8 | S 13 | WNW 11 |
16 | 15 | 44 | 25 | 22 | 36 | 2 | 20 | 12 | 31 | 25 | 51 | 25 | 45 | 15 | 2 | 19 | 8 | 5 | 13 | 12 | |
Swell 3 Height (m) Direction Period (s) | SW 18 | SSW 17 | SSW 12 | S 12 | S 12 | W 11 | S 11 | W 12 | S 20 | W 12 | NE 9 | W 11 | NE 7 | W 10 | SSW 15 | E 13 | W 9 | SSW 13 | S 13 | W 12 | S 13 |
12 | 28 | 14 | 11 | 11 | 9 | 2 | 11 | 7 | 11 | 13 | 10 | 14 | 8 | 42 | 3 | 2 | 17 | 14 | 10 | 13 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 8 | — | NNE 8 | NNE 7 | — | — | — | — | — | NNE 7 | — | NNE 6 | NNE 6 | NNE 7 | NNE 7 |
— | — | — | — | — | — | 120 | — | 101 | 75 | — | — | — | — | — | 93 | — | 33 | 40 | 84 | 93 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 88 | 38 | 42 | 88 | 29 | 29 | 41 | 46 | 29 | 92 | 29 | 29 | 88 | 94 | 41 | 94 | 29 | 41 | 94 | 41 | 29 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.











