Surf Forecasts:
Sixtynine surf forecast from 28 Aug 2026:
- Most powerful swell: Sunday 30 Aug, 5AM (local time) - 1ft (0.3m), 16s period, SW swell with 43 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 16s and forecast to arrive on Sunday (Aug 30) at 5AM. 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 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sun 30th Aug) | 1ft (0.3m) 16s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – the next couple of weeks are a tough watch for Sixtynine. The whole 16-day window is basically flat or tiny, with nothing that gets the heart racing. We’re looking at a long run of weak, messy, or non-existent surf. It’s one of those spells where you might be better off doing a reef cleanup or just going for a paddle, because the waves just aren't cooperating. Let's get into the details.
Starting from Thursday the 27th of August right through to the 11th of September, this is a real test of patience. There are no standout days, no one session that leaps out. The water’s sitting at a warm 82°, which is about a touch warmer than normal for this time of year, but that’s about the only positive. The energy in the water is laughable, with the combined swell energy struggling to even hit triple digits most days – we’re talking single and low double digits like 5, 11, or 12 at best, which is just pure weakness.
The first few days are particularly grim. Thursday afternoon has a tiny 0.6 ft from the north with a short 8-second period, and while the wind is light cross-off from the NE, that little dribble won't stand you up. Friday and Saturday are even worse, with many sessions reading as zero swell and "poor surf conditions". A small 0.3 ft to 0.6 ft sneaks in, but with periods all over the place – a long 18-second period on Saturday morning for a 0.3 ft wave is purely an oceanographer's curiosity, not a surfer's wave.
We crawl into early September with the same story. Monday the 31st of August has a tiny bump of 1.0 ft from the SW, with a 15-second period and combined energy of 33. That’s a whisper, not a roar. Winds are generally light and cross or cross-off, which would be beautiful if there was any swell, but there's nothing to ride. The whole first week is a write-off.
Heading into the second week, things don't really improve. From Tuesday the 1st of September to Thursday the 10th, it’s a wasteland of zeros and 0.6 ft waves. There are a couple of glassy moments on Saturday the 5th afternoon and Monday the 7th afternoon, which would be a dream setup, but the swell is practically non-existent at 0.6 ft and 1.0 ft respectively. The combined energy stays pathetically low, mostly in the single and low tens.
Finally, on Thursday the 10th of September morning, we see the biggest combined energy of the whole run at 85, with a 1.0 ft from the SW and a 16-second period. The problem is it’s onshore from the west. Friday the 11th of September afternoon brings the best wave size of the window – 2 ft from the west, a 13-second period, and combined energy of 89. The wind goes glassy from the west. It’s surfable but very ordinary. For a break that’s fairly exposed to the optimum WNW direction, this is a big letdown. The consistency is there, but the size and quality are not.
Honestly, there is no "best on offer" here. It's all poor. If you're desperate, the very end of the run on the 11th of September afternoon gives you the biggest lump of the fortnight at 2 ft, but that's it. The rest is just staring at a flat ocean. Hang in there, the long-range might turn, but right now, it's a full two-week blank.
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Fri afternoon, min 24°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Tue morning, min 24°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||
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 8 | N 7 | SSW 14 | W 10 | W 10 | SW 18 | NE 6 | NNE 6 | W 12 | NNE 7 | SW 15 | SW 15 | W 12 | NNE 7 | NNE 7 | W 12 | W 11 | W 10 | W 10 | W 10 |
Wave Graph | ||||||||||||||||||||
5 | 9 | 0 | 8 | 8 | 12 | 0 | 0 | 11 | 0 | 0 | 33 | 11 | 0 | 0 | 12 | 10 | 8 | 8 | 8 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross | cross-off | cross-on | cross-on | cross-off | on | cross-on | glassy |
High Tide | 3:56PM0.71m | 4:12AM0.43m | 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 | |||||||
Low Tide | 10:35PM0.03m | 9:51AM0.02m | 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 | |||||||
— | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 27 | 28 | 26 | 27 | 28 | 26 | 28 | 28 | 25 | 28 | 28 | 26 | 29 | 28 | 26 | 29 | 28 | 26 |
Feels °C | 29 | 28 | 28 | 29 | 29 | 29 | 29 | 27 | 30 | 30 | 25 | 28 | 29 | 28 | 31 | 30 | 29 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | NE 5 | SSW 15 | NNE 5 | SSW 13 | NE 6 | NE 6 | NE 6 | NNE 6 | NE 7 | NNE 7 | NNE 7 | NNE 8 | NNE 8 | NNE 7 | NNE 7 | NE 8 | NE 8 | NE 8 | NE 7 | SSW 15 |
28 | 42 | 17 | 18 | 32 | 32 | 51 | 27 | 69 | 61 | 42 | 91 | 123 | 72 | 62 | 136 | 91 | 84 | 107 | 42 | |
Swell 2 Height (m) Direction Period (s) | SSW 15 | N 7 | NNE 7 | N 6 | SSW 13 | SSW 13 | SSW 12 | ENE 7 | SSW 16 | SSW 15 | SW 15 | SW 15 | SSW 14 | NE 8 | NE 8 | SSW 18 | SSW 16 | SSW 16 | SSW 15 | W 10 |
44 | 9 | 9 | 3 | 34 | 16 | 15 | 5 | 25 | 22 | 58 | 33 | 20 | 41 | 35 | 31 | 51 | 51 | 45 | 8 | |
Swell 3 Height (m) Direction Period (s) | N 8 | W 9 | SSW 14 | W 10 | W 10 | SW 18 | SSW 17 | SSW 17 | W 12 | S 12 | SSW 10 | SSW 8 | W 12 | SSW 14 | SSW 18 | W 12 | W 11 | W 10 | W 10 | SW 13 |
5 | 2 | 39 | 8 | 8 | 12 | 28 | 27 | 11 | 11 | 9 | 7 | 11 | 20 | 31 | 12 | 10 | 8 | 8 | 7 | |
Wind waves Height (m) Direction Period (s) | — | NNE 5 | — | NE 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 8 |
— | 17 | — | 28 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 103 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 94 | 38 | 94 | 58 | 41 | 88 | 41 | 42 | 88 | 29 | 5 | 94 | 29 | 29 | 88 | 88 | 29 | 88 | 42 | 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.











