Surf Forecasts:
Sixtynine surf forecast from 22 Aug 2026:
- Best quality surf: Sunday 23 Aug, 5AM (local time) - 1.5ft (0.4m), 12s period, NW swell with glassy winds.
- Most powerful swell: Sunday 23 Aug, 11AM (local time) - 1.5ft (0.5m), 12s period, WNW swell with 75 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 5AM (local time) - 1.5ft (0.4m), 12s period with NW 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 5AM. The primary swell is predicted to be 0.4m and 12s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sixtynine in the next 16 days are 0.5m 12s and forecast to arrive on Sunday (Aug 23) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Saturday (Aug 22) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sun 23rd Aug) | 1.5ft (0.4m) 12s |
| Best Surf | 5AM (Sun 23rd Aug) | 1.5ft (0.4m) 12s |
| Most Powerful | 11AM (Sun 23rd Aug) | 1.5ft (0.5m) 12s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the cards for Sixtynine.
Honestly, I'm looking at this 16-day window and it's a bit of a tough one. We've got a real quiet run ahead. The first few days don't offer much at all, and it stays that way for a long stretch. There's a big gap in the middle where there's basically nothing on offer, and the whole period is a bit of a struggle to find a proper wave.
Right now, starting from Saturday the 22nd of August, we're looking at tiny, weak swell. The water's sitting at a warm 81°, which is pretty much normal for the time of year, so the rubber's fine. The problem is the energy. On Saturday morning, we've got a weak 1ft swell from the SW, with a long period of 15 seconds, but the combined energy is only 70 (weak). The wind is a light cross-onshore from the NNW, so it's not clean. The afternoon doesn't improve, with a 2ft W swell and only 57 (weak) energy. Everything is labelled "poor surf conditions." Sunday the 23rd sees a little more energy, 2ft from the WNW with a period of 12 seconds, and the combined energy hits 109 (moderate), but the wind is a cross-shore from the NNE, messing up the face. It's still a no-go.
We then hit a real flat spell. From Monday the 24th of August all the way through to about the 30th of August, there's virtually no swell. A few tiny pulses of 0.3ft or 0.7ft, and the combined energy drops to single digits. The wind is light, and we get a few glassy moments on the afternoon of the 27th and the 31st, but with no swell, that's just a calm lake. This is a solid week of nothing.
We finally see a tiny blip of life on Monday the 31st of August. The morning shows a 1ft groundswell from the SW, period of 15 seconds, and a combined energy of 34 (weak). The wind is onshore from the NW, so it's poor. The afternoon is glassy, but it's only a 0.7ft W swell. Not enough to ride.
The first week of September is much the same. Up to the 5th of September, we're looking at tiny, weak swells, with the wind being mostly cross or cross-off from the NE. The combined energy stays well under 100 (weak). There's a bit of a spike on the 4th of September with a 1ft N swell, period 10 seconds, and 27 (weak) energy, but it's still just not enough to get excited about.
The only thing that stands out is the wind on the 5th and 6th of September, but for the wrong reasons. On Saturday the 5th of September, we get a strong 22 mph breeze from the NE, and then Sunday the 6th of September sees a severe gale from the NNE at 47 mph. Combined with the tiny, weak swell, this setup would be a complete mess. For a beach break like this, the conditions are more interesting for kite surfing than paddle surfing. The swell is too small and the wind is too strong.
There's no standout surf here. The entire 16-day window is a write-off for decent waves. It's a flat spell, and it's a normal thing for this area to have these blank runs. We'll have to wait for the next forecast to see if things pick up.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Mon afternoon. Warm (max 29°C on Sat morning, min 26°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Tue morning, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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 15 | W 11 | WNW 10 | WNW 12 | WNW 11 | WNW 10 | WNW 12 | NW 11 | NE 6 | NE 6 | NE 6 | W 11 | NNE 5 | NE 6 | SSW 16 | SSW 16 | N 8 | N 8 | N 7 | N 7 | W 10 |
Wave Graph | |||||||||||||||||||||
37 | 57 | 58 | 75 | 44 | 19 | 13 | 5 | 0 | 0 | 0 | 10 | 0 | 0 | 0 | 0 | 5 | 11 | 9 | 9 | 8 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross | cross | glassy | on | cross-off | cross-off | cross-on | cross | cross-off | cross | cross | cross-off | cross | glassy | cross-off | cross | cross | cross-off |
High Tide | 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 | 4:24PM0.68m | 4:50AM0.48m | |||||||
Low Tide | 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 | 9:51AM0.02m | 10:57PM0.01m | ||||||||
6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | |
— | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:42 | — | |
mm | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 28 | 26 | 28 | 29 | 26 | 28 | 28 | 25 | 27 | 28 | 26 |
Feels °C | 32 | 33 | 30 | 30 | 30 | 31 | 32 | 33 | 31 | 33 | 32 | 27 | 29 | 30 | 28 | 29 | 31 | 27 | 29 | 30 | 27 |
Swell 1 Height (m) Direction Period (s) | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | SSW 14 | NNE 5 | NE 6 | NNE 5 | NNE 4 | NE 5 | NE 5 | N 7 | NE 5 | NNE 7 |
54 | 75 | 35 | 54 | 52 | 43 | 40 | 64 | 32 | 39 | 51 | 21 | 22 | 36 | 15 | 8 | 27 | 11 | 9 | 27 | 9 | |
Swell 2 Height (m) Direction Period (s) | WNW 10 | W 11 | WNW 10 | WNW 12 | WNW 11 | WNW 10 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 15 | SSW 17 | SSW 13 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | N 7 | SSW 13 |
33 | 57 | 58 | 75 | 44 | 19 | 18 | 35 | 32 | 29 | 29 | 14 | 21 | 28 | 17 | 48 | 44 | 42 | 39 | 9 | 34 | |
Swell 3 Height (m) Direction Period (s) | SW 15 | SW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 | WNW 12 | NW 11 | SSW 16 | SSW 16 | SSW 16 | W 11 | SSW 11 | SSW 14 | SSW 16 | ENE 6 | N 8 | N 8 | SW 11 | SSW 13 | W 10 |
37 | 63 | 58 | 34 | 21 | 20 | 13 | 5 | 26 | 25 | 24 | 10 | 12 | 18 | 25 | 4 | 5 | 11 | 4 | 18 | 8 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | NE 5 | — | — | — | — | — | — | NNE 5 | — | NE 6 |
— | — | — | — | — | — | — | — | — | — | — | 24 | — | — | — | — | — | — | 16 | — | 35 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 5 | 5 | 5 | 29 | 38 | 84 | 84 | 42 | 94 | 94 | 38 | 94 | 46 | 94 | 94 | 94 | 38 | 88 | 88 | 41 |
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.











