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 1.1m 8s period and expected on Monday (Aug 31) 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, I’m Rusty, and I’ve been glued to the charts for your local stretch over the next 16 days. To be straight with you, it’s a seriously quiet outlook. There’s a massive dry spell at the start, and we don’t see anything worth paddling for until the second week. Let’s break it down.
From the 28th of August all the way through to the morning of Saturday, 12th September, it’s a flat or near-flat desert. Tons of days with zero energy, cross-shore breezes, and tiny, unrideable ripples. The water temp is around 28°, which is about a degree warmer than average, so it’s a touch balmy, but that’s about all you’ve got going on.
The one and only standout hits on the afternoon of Saturday, 12th September, at Sixtynine. We finally see a pulse: a 0.6m swell from the west, with a period of 14 seconds (that’s long-period groundswell, good energy), and a combined energy of 144 (moderate). The wind goes glassy, which is perfect for clean conditions. The break is fairly exposed to the WNW, and the optimum direction is WNW, so this west swell is well-aligned. It’s an intermediate spot that’s consistent, but you might run into a few others out there. With the size at 0.6m, it’s accessible for everyone. That afternoon glass-off is your only real window. The morning has a light onshore wind from the WNW, so wait for that afternoon.
After that, it fades back to nothing. So, if you’re hanging for a session, that Saturday afternoon is the lone shot. A quiet run like this is more normal for the area when there’s no proper swell moving through. The forecasts can always change, so don’t lose hope.
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Sat morning, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Tue afternoon, min 25°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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) | N 6 | W 10 | NE 7 | NE 6 | SW 17 | W 12 | NE 7 | SW 15 | SW 15 | W 12 | W 12 | NNE 7 | NE 8 | W 11 | W 11 | W 10 | W 10 | W 9 | NNE 5 | NNE 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 3 | 8 | 0 | 0 | 44 | 11 | 0 | 36 | 33 | 11 | 12 | 0 | 0 | 10 | 9 | 8 | 8 | 7 | 0 | 0 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross | cross-off | cross | glassy | cross-off | cross-on | glassy | glassy | cross | cross | cross-off |
High Tide | 4:24PM0.68m | 4:50AM0.48m | 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 | |||||||
Low Tide | 10:57PM0.01m | 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 | |||||||
 |  | |  |  | | | | | | | | | | | | | | | | |
 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 28 | 26 | 28 | 29 | 26 | 28 | 28 | 26 | 28 | 29 | 26 |
Feels °C | 30 | 29 | 30 | 30 | 29 | 29 | 30 | 27 | 28 | 28 | 28 | 29 | 31 | 29 | 30 | 31 | 30 | 29 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | NNE 5 | NE 6 | N 6 | NE 6 | NNE 6 | NNE 7 | NE 7 | NE 7 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | NE 8 | NNE 8 | NE 8 | NE 8 | NNE 8 | SSW 14 | NNE 6 | NNE 6 |
| kJ | 23 | 33 | 18 | 51 | 22 | 62 | 67 | 49 | 98 | 103 | 101 | 70 | 80 | 112 | 84 | 84 | 98 | 40 | 12 | 33 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | NE 7 | SSW 12 | NE 8 | SSW 16 | SSW 15 | SW 15 | SW 15 | SSW 14 | SSW 14 | NE 8 | NNE 7 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | W 9 | NE 8 | ENE 8 |
| kJ | 18 | 34 | 21 | 15 | 16 | 25 | 22 | 36 | 33 | 20 | 20 | 53 | 57 | 51 | 51 | 45 | 42 | 7 | 15 | 13 |
Swell 3 Height (m) Direction Period (s) | N 6 | W 10 | SSW 13 | SSW 17 | SW 17 | W 12 | S 12 | W 11 | SSW 11 | W 12 | W 12 | SSW 18 | SSW 18 | W 11 | W 11 | W 10 | W 10 | E 12 | SSW 14 | SSW 13 |
| kJ | 3 | 8 | 16 | 28 | 44 | 11 | 11 | 9 | 11 | 11 | 12 | 31 | 31 | 10 | 9 | 8 | 8 | 3 | 19 | 18 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 7 | NNE 5 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 90 | 21 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 94 | 41 | 88 | 57 | 29 | 88 | 29 | 38 | 41 | 57 | 38 | 29 | 94 | 29 | 88 | 57 | 29 | 94 | 46 | 42 |
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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