Surf Forecasts:
Sixtynine surf forecast from 21 Aug 2026:
- Best quality surf: Sunday 23 Aug, 2AM (local time) - 1.5ft (0.5m), 10s period, WNW swell with cross-offshore winds.
- Most powerful swell: Sunday 23 Aug, 11AM (local time) - 1.5ft (0.5m), 11s period, WNW swell with 70 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 2AM (local time) - 1.5ft (0.5m), 10s period with WNW swell.
Best Forecast Surf Conditions for Sixtynine this week:
The surf forecast for Sixtynine over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 23) at 2AM. The primary swell is predicted to be 0.5m and 10s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Sixtynine in the next 16 days are 0.5m 11s and forecast to arrive on Sunday (Aug 23) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Saturday (Aug 22) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 23rd Aug) | 1.5ft (0.5m) 10s |
| Best Surf | 2AM (Sun 23rd Aug) | 1.5ft (0.5m) 10s |
| Most Powerful | 11AM (Sun 23rd Aug) | 1.5ft (0.5m) 11s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at the next couple of weeks.
Honestly, mate, it’s a pretty bleak run ahead. We’ve got Sixtynine on the menu, and for a spot that’s fairly exposed to a WNW swell, it’s just not delivering much. The whole sixteen-day window is a struggle. You’re looking at a long gap of seriously poor conditions from the start, with only a tiny flicker of life right at the very end.
First up, Friday the 21st of August. It’s small. We’re talking 2 ft of swell from the west, with a 10-second period. Combined wave energy is a weak 52, nothing to get excited about. The morning has a light west wind, but the afternoon glassed right off – that’s the only positive. But with those tiny waves, it’s still just poor surf.
Saturday the 22nd is even smaller, dropping to 1 ft from the southwest early, with a long 15-second period – that’s groundswell, but it’s got no power behind it (energy is 70). Clean morning, but it’s barely a ripple.
Then we hit a dead zone. From Sunday the 23rd morning, with a short burst of moderate energy at 111 but lousy cross-shore wind, through to Saturday the 5th of September, it’s just a desert. Days and days of nothing or close to nothing – flat spells where the energy drops to zero. Any tiny pulses of swell are accompanied by messy wind or rain. There’s a little 0.7 ft bump on the 24th with glassy conditions, but at 13 energy, you wouldn’t bother paddling out.
The only day that even raises an eyebrow is Saturday the 5th of September. Finally, we get a consistent little pulse: 2 ft from the west, 12-second period, with 75 energy. The morning has a light offshore wind, and the afternoon goes glassy. It’s described as surfable, but very ordinary – and I’d agree. It’s the best of a terrible bunch, but that’s not saying much. For a beginner, this is fine; it’s tiny and clean. For anyone else, it’s a last-resort paddle.
Nothing here is a standout. It’s one of those runs where the ocean just shuts down. For a spot that needs a bit of west in the swell, we just aren’t getting it. The water temp is sitting around 81°, which is normal for this time of year.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun afternoon. Warm (max 29°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Mon afternoon. Warm (max 29°C on Mon morning, min 25°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | W 10 | W 11 | W 10 | SW 15 | W 11 | WNW 10 | WNW 11 | WNW 11 | WNW 10 | WNW 12 | WNW 12 | WNW 11 | NE 6 | NE 6 | W 11 | NNE 5 | W 10 | S 16 | N 8 | N 8 | N 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 52 | 59 | 50 | 37 | 57 | 58 | 70 | 44 | 18 | 14 | 14 | 11 | 0 | 0 | 10 | 0 | 8 | 0 | 5 | 5 | 5 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-off | on | cross | cross-off | cross-on | cross | cross-off | cross-on | glassy | cross-off | cross | cross | cross-off | cross | cross-off | cross-off | cross-on | glassy | cross-off |
High Tide | 12:08PM0.59m | 11:45PM0.18m | 1:04PM0.62m | 1:02AM0.20m | 1:49PM0.66m | 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 | |||||||
Low Tide | 8:34PM0.15m | 8:53PM0.12m | 6:05AM0.06m | 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 | |||||||||
 | |  |  | | | |  |  | |  | | | | | | | | | | | |
 | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — |
mm | — | — | — | — | — | — | — | 1 | — | — | 2 | — | — | 1 | — | — | — | — | — | — | — |
Temp °C | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 26 | 28 | 27 | 26 | 28 | 28 | 26 |
Feels °C | 32 | 32 | 32 | 32 | 32 | 31 | 32 | 32 | 30 | 33 | 34 | 31 | 32 | 32 | 29 | 30 | 29 | 27 | 31 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NNE 5 | NE 5 | NE 6 | NE 6 | NE 6 | NE 6 | SSW 14 | NNE 5 | SSW 17 | NNE 5 | SSW 16 | NNE 5 | NE 5 |
| kJ | 31 | 54 | 44 | 46 | 83 | 45 | 51 | 75 | 15 | 28 | 42 | 39 | 31 | 31 | 21 | 22 | 28 | 16 | 47 | 21 | 12 |
Swell 2 Height (m) Direction Period (s) | W 10 | W 11 | W 10 | WNW 10 | W 11 | WNW 10 | WNW 11 | WNW 11 | NE 6 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 15 | SSW 14 | SSW 13 | N 8 | SSW 15 | SSW 15 |
| kJ | 52 | 59 | 50 | 33 | 57 | 58 | 70 | 44 | 9 | 18 | 35 | 32 | 30 | 14 | 14 | 21 | 18 | 17 | 5 | 44 | 42 |
Swell 3 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | SW 15 | SW 16 | SW 15 | SW 15 | SSW 14 | WNW 10 | WNW 12 | WNW 12 | WNW 11 | SSW 16 | SSW 16 | W 11 | ENE 7 | W 10 | S 16 | ENE 7 | N 8 | N 8 |
| kJ | 72 | 65 | 64 | 37 | 63 | 36 | 34 | 21 | 18 | 14 | 14 | 11 | 25 | 24 | 10 | 5 | 8 | 21 | 4 | 5 | 5 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 5 | — | NE 5 | — | NE 5 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 28 | — | 28 | — | 10 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 8 | 5 | 5 | 8 | 5 | 0 | 5 | 45 | 29 | 84 | 84 | 46 | 94 | 97 | 38 | 88 | 38 | 41 | 94 | 94 | 94 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Sixtynine surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest