Surf Forecasts:
Sixtynine surf forecast from 31 Aug 2026:
- Best quality surf: Saturday 5 Sep, 11PM (local time) - 2.5ft (0.7m), 10s period, SW swell with glassy winds.
- Most powerful swell: Saturday 5 Sep, 11PM (local time) - 2.5ft (0.7m), 10s period, SW swell with 100 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 11PM (local time) - 2.5ft (0.7m), 10s 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 Saturday (Sep 05) at 11PM. The primary swell is predicted to be 0.7m and 10s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sixtynine in the next 16 days are 0.7m 10s and forecast to arrive on Saturday (Sep 05) at 11PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Monday (Aug 31) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sat 5th Sep) | 2.5ft (0.7m) 10s |
| Best Surf | 11PM (Sat 5th Sep) | 2.5ft (0.7m) 10s |
| Most Powerful | 11PM (Sat 5th Sep) | 2.5ft (0.7m) 10s |
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 cooking for the next couple of weeks.
Right off the bat, I gotta be straight with you – it’s a rough one. We’re staring down a long, dry spell with no real surf to speak of for a solid week. From Monday the 31st of August right through to Sunday the 6th of September, there’s just nothing happening. Tiny waves, weak energy, and the wind is never quite lined up right. It’s one of those stretches where you’re better off tuning the board or going for a paddle on the flat.
The only spot on the radar is Sixtynine, and it’s a consistent intermediate break, but even that can’t save us. The first real sign of life doesn’t show up until Monday the 7th of September, but even then, it’s a weak little 0.3ft groundswell from the SW with a long 14-second period, and the wind is a stiff cross-offshore from the NE at 22 mph. That’s a lot of breeze for not much wave. The combined energy is barely a whisper at 13. Forget it.
Tuesday the 8th is a write-off, blown out with a messy onshore wind. Wednesday and Thursday the 9th and 10th are mostly flat, though Thursday afternoon turns glassy – a tiny 1ft SW swell with an 8-second period pops up, but it’s only got 10 points of energy. It’s a pretty, empty ocean, but not a surfable one.
Now, we start to see a little pulse around Friday the 11th of September. There’s a 1ft SW groundswell with a very long 15-second period pushing in, combined energy of 62. The wind is a clean cross-offshore from the NE at 9 mph. However, that long period is prone to breaking straight on a beach break, so Sixtynine (a beach break) might not hold it well. It’s a tease, but it’s our first real chance of a clean, tiny wave in over a week.
Saturday the 12th offers a similar story – a 1ft WNW mid-period swell (12 seconds) in the morning, then a glassy afternoon with a 1ft SW groundswell. Energy is still low, maxing out at 29. It’s small, but at least the wind is kind.
The best of the bunch, if you can call it that, rolls in on Sunday the 13th of September. We’ve got a 1ft SW groundswell with a very long 16-second period, and the combined energy nudges up to 38. The wind is offshore – WNW at 6 mph in the morning, and glassy in the afternoon with a light NW breeze. That’s clean, but again, the long period and small size mean it’s a delicate wave for a beach break. It’s the standout, but only because everything else is so poor.
Through the rest of the second week, it’s the same story. Tiny 1ft swells, mostly from the SW, with weak energy (29 to 49). The wind is often offshore or glassy, so the conditions are clean, but there’s just no power behind it. The combined energy (49) on Monday the 14th of September is the highest of the whole run, but it’s still just a weak knee-high dribble.
Honestly, there’s no screaming session in this forecast. If you’re a beginner, the swell never gets above 2ft, so it’s not dangerous, but it’s also not really a wave. For the rest of us, it’s a flat spell with a few tiny, clean windows. The best bet is to wait for the glassy afternoons around the 13th and 14th of September, when the wind is off and there’s at least a little roll to the ocean. But don’t expect much.
Stay patient, and keep an eye on the charts. It tends not to stay this quiet forever.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 25°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sat afternoon. Warm (max 29°C on Sat morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||
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 | SW 15 | NNE 6 | NNE 8 | W 12 | N 7 | W 11 | NE 8 | W 10 | W 10 | W 9 | W 9 | W 9 | NE 7 | NE 7 | NE 6 | NE 7 | NNE 8 | SW 10 |
Wave Graph | |||||||||||||||||||
36 | 33 | 0 | 0 | 11 | 0 | 10 | 0 | 8 | 8 | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 96 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | on | glassy | cross-off |
High Tide | 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 | 11:57AM0.69m | 00:08AM0.19m | |||||||
Low Tide | 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 | 7:52PM0.09m | |||||||
— | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
6:39 | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 26 | 27 | 28 | 26 | 28 | 29 | 26 | 29 | 29 | 26 | 27 | 27 | 25 | 28 | 28 | 27 | 29 | 28 | 27 |
Feels °C | 28 | 28 | 29 | 27 | 28 | 30 | 28 | 32 | 32 | 26 | 27 | 26 | 25 | 31 | 31 | 29 | 32 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NNE 8 | NNE 6 | ENE 8 | NE 8 | NE 6 | NE 8 | NE 8 | NE 7 | NE 7 | SSW 14 | NE 7 | SSW 13 | NE 7 | NE 7 | NE 6 | NE 7 | NNE 8 | NE 7 |
43 | 101 | 53 | 23 | 31 | 35 | 33 | 60 | 104 | 79 | 20 | 118 | 18 | 106 | 99 | 56 | 99 | 98 | 71 | |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 15 | NE 8 | SSW 14 | SSW 18 | N 7 | SSW 16 | N 7 | SSW 15 | SSW 15 | W 9 | SSW 14 | E 13 | S 12 | S 11 | SSW 10 | SSW 10 | SSW 10 | SW 10 |
36 | 33 | 29 | 19 | 31 | 47 | 51 | 34 | 45 | 42 | 2 | 19 | 3 | 11 | 20 | 19 | 95 | 63 | 96 | |
Swell 3 Height (m) Direction Period (s) | W 11 | W 11 | SSW 14 | SSW 19 | W 12 | ENE 8 | W 11 | SSW 16 | W 10 | W 10 | E 12 | W 9 | W 9 | S 13 | S 13 | SSW 12 | NNE 11 | ENE 6 | NNE 9 |
9 | 2 | 20 | 36 | 11 | 26 | 10 | 50 | 8 | 8 | 3 | 2 | 2 | 14 | 13 | 28 | 22 | 13 | 15 | |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 8 | NNE 6 | — | NNE 7 | — | — | — | NE 7 | — | NE 7 | — | — | — | — | — | — |
— | — | — | 74 | 66 | — | 50 | — | — | — | 109 | — | 114 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 38 | 29 | 29 | 29 | 41 | 29 | 42 | 29 | 29 | 29 | 29 | 29 | 29 | 84 | 29 | 29 | 5 | 88 | 0 |
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.











