Surf Forecasts:
Sixtynine surf forecast from 19 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 11PM (local time) - 1ft (0.3m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 23 Aug, 8AM (local time) - 2ft (0.6m), 12s period, WNW swell with 106 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 11PM (local time) - 1ft (0.3m), 16s period with SW 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 Wednesday (Aug 19) at 11PM. The primary swell is predicted to be 0.3m and 16s period with a secondary swell of 0.3m and 12s. 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 0.6m 12s and forecast to arrive on Sunday (Aug 23) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Sunday (Aug 23) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 19th Aug) | 1ft (0.3m) 16s |
| Best Surf | 11PM (Wed 19th Aug) | 1ft (0.3m) 16s |
| Most Powerful | 8AM (Sun 23rd Aug) | 2ft (0.6m) 12s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
G'day, I'm Rusty, and here's the lowdown on the surf outlook for our area. This is a tough stretch—flat as a pancake for most of the 16-day forecast window, with hardly a wave worth chasing.
The only break in the mix is Sixtynine, a consistent intermediate spot that's fairly exposed to a WNW swell, which is the optimum direction. But the numbers are grim: the whole period is ruled by tiny swell and poor conditions. The water temp is 81°F, which is pretty average for this time of year, so no drama there.
The first real chance of anything happens on Sunday, August 23rd. The morning has a light cross-shore breeze and a 2ft WNW swell, with a combined energy of 104 (moderate) and a short 11-second period. It's still poor. The afternoon looks a bit better: light cross-offshore winds from the NE at 3 mph, with a 1ft WNW swell and 79 energy. The conditions are "clean" and "surfable but very ordinary"—a 1 out of 10, but it's the best we've got.
After that, it's a dry spell. From Monday the 24th through to early September, the swell drops to 0.3ft or 0.7ft at best, with energy readings in the single digits or low teens—that's weak. There are a few glassy moments, like Tuesday afternoon the 25th with calm winds, but no swell means no waves. A tiny pulse shows up on Wednesday, September 2nd, with a 1ft, 15-second period W swell, but the energy is only 38, and it's still poor.
The final day in the forecast, Thursday, September 3rd, offers a bit more. The morning has a 1ft WNW swell with a 14-second period and 64 energy, but it's onshore. The afternoon turns glassy with a 1ft, 15-second period WNW swell and 74 energy—this is the other "surfable but very ordinary" moment. With such a long period groundswell, a beach break like Sixtynine might break a bit straight, but on a glassy day, it's worth a look for the dedicated.
Bottom line: this is a quiet stretch. Sixtynine is usually consistent, so it rarely stays this flat for long, but right now the pickings are slim. The best shots are the afternoon of Sunday the 23rd and the afternoon of Thursday the 3rd of September. Otherwise, it's a good time to kick back and wait for a proper swell.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Wed afternoon, min 25°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Sat morning, min 26°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | WNW 12 | WNW 12 | SW 16 | SW 18 | SW 17 | W 10 | W 10 | W 10 | W 10 | W 10 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | SW 14 | WNW 11 | NNE 5 | NE 5 | NE 5 | W 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 48 | 28 | 41 | 49 | 47 | 35 | 53 | 52 | 53 | 52 | 64 | 91 | 70 | 46 | 19 | 8 | 12 | 0 | 0 | 0 | 10 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | glassy | on | on | glassy | on | glassy | glassy | cross-on | cross | cross-off | cross | cross-off | glassy | on | cross-on | glassy | on | glassy | glassy |
High Tide | 9:44AM0.55m | 7:33PM0.25m | 10:59AM0.57m | 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 | ||||||||
Low Tide | 5:41PM0.25m | 2:31AM0.07m | 3:32AM0.09m | 8:34PM0.15m | 8:53PM0.12m | 6:05AM0.06m | 9:13PM0.10m | 7:02AM0.04m | 9:33PM0.09m | 7:49AM0.01m | 9:53PM0.07m | ||||||||||
 | |  |  | | | | |  | | | | | | | | | | |  | | |
 | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — |
Temp °C | 28 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 26 | 29 | 29 | 27 | 29 | 29 | 27 | 28 | 29 | 27 | 29 | 28 | 26 |
Feels °C | 30 | 32 | 30 | 31 | 31 | 32 | 31 | 31 | 30 | 31 | 31 | 28 | 32 | 32 | 30 | 31 | 32 | 32 | 32 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | WNW 12 | WNW 12 | NNE 6 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NE 7 | NE 5 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 5 | NE 6 | NE 6 | NNE 5 | NE 5 | NE 5 | NNE 5 |
| kJ | 48 | 28 | 31 | 32 | 31 | 31 | 30 | 54 | 11 | 54 | 56 | 31 | 46 | 71 | 12 | 36 | 39 | 16 | 27 | 30 | 18 |
Swell 2 Height (m) Direction Period (s) | NNE 7 | NNE 6 | WNW 11 | W 11 | WNW 11 | W 10 | W 10 | W 10 | W 10 | W 10 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | N 6 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 14 |
| kJ | 5 | 8 | 25 | 38 | 23 | 35 | 53 | 52 | 53 | 52 | 64 | 91 | 70 | 46 | 18 | 18 | 35 | 16 | 15 | 14 | 21 |
Swell 3 Height (m) Direction Period (s) | SSW 16 | NE 7 | SW 16 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | NE 7 | SW 15 | SW 16 | SW 15 | SW 15 | SW 14 | WNW 10 | SW 14 | WNW 11 | ENE 7 | SSW 16 | SSW 16 | W 11 |
| kJ | 25 | 7 | 41 | 49 | 47 | 69 | 69 | 65 | 11 | 37 | 63 | 58 | 34 | 33 | 19 | 8 | 12 | 5 | 25 | 24 | 10 |
Wind waves Height (m) Direction Period (s) | NNE 4 | NNE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 6 | 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 29 | 3 | 8 | 8 | 5 | 8 | 5 | 42 | 5 | 5 | 0 | 5 | 0 | 29 | 94 | 57 | 42 | 84 | 84 | 43 |
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.
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