Surf Forecasts:
Sixtynine surf forecast from 27 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 1.2m 8s period and expected on Wednesday (Sep 02) at 8AM.
| 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, I’m looking at the charts for your area, and I’ve gotta be straight with you – it’s a tough stretch ahead. We’re looking at a long, slow run of tiny, poor surf, and honestly, I wouldn’t paddle out for most of it. Let’s break it down.
The first real chance of waves comes in on Wednesday afternoon, August 26th, but it’s a no-go – zero combined swell energy, just a light cross-shore breeze. That sets the tone for the next few days. We’ve got a gap from the 26th through to the 31st of August where the wave heights are barely a ripple, mostly 0.3 ft to 0.7 ft, with cross-shore winds and no real swell energy to speak of. The combined energy values are all in the single digits or zero (0 to 9), which is basically flat. It’s a tough stretch for a surf check.
Then, come Monday, August 31st, we finally see a pulse. The morning shows a 1.0 ft south-west swell with a 15-second period, and combined energy climbs to 33. That’s still weak, but it’s the most we’ve seen. The wind is moderate cross-shore, so it’s not clean, but it’s something. The swell direction is from the south-west, which is a bit off the optimum west-north-west for the break, and with such a long period (15 seconds), it’s likely to be a bit too lined up for the beach, but it’s a start.
After that, we hit another quiet patch from September 1st to the 4th, with nothing above 0.7 ft and combined energy dropping back to zero or single digits. Winds are variable, sometimes glassy, but no swell to work with.
The real window of interest gets going on Tuesday, September 8th. The afternoon glass-off with a 1.0 ft south-west swell, 15-second period, and combined energy of 62 – that’s the best we’ve seen so far. The glassy wind is a huge plus, but the swell is still small. It’s a promising but low-energy start.
Wednesday, September 9th, kicks up a notch. The afternoon sees a 1 ft west-north-west swell, 13-second period, and combined energy of 58. The wind is a fresh cross-offshore breeze (19 mph), which will keep the surface clean. That’s your best bet for the whole window – consistent, clean, and a little more push.
Then Thursday, September 10th, gets interesting for the wrong reasons. The morning rain showers bring a strong cross-offshore breeze (28 mph) and a 1 ft west-north-west swell, with combined energy of 88. The afternoon cranks it up to a 2 ft west swell, 14-second period, and combined energy of 152. That’s moderate wave energy, the strongest in the forecast. But the wind is strong (25 mph) and the swell is still small. With that wind strength and the beach setup, I’d say this is looking more like a kite-surfing day than a solid paddle session.
The water temp is 82°F, about a touch warmer than normal for this time of year – so a nice warm bath to go with the small waves.
Overall, the standout is the afternoon of Wednesday, September 9th at Sixtynine. It’s consistent, the wind is clean, and the swell is the best of a disappointing bunch. The Thursday the 10th has more energy, but the wind is too strong for comfortable surfing. Keep your expectations low, and you might find a few fun ones.
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Wed afternoon, min 24°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Mon afternoon, min 25°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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) | NE 5 | W 10 | SSW 16 | N 8 | N 7 | W 11 | W 10 | W 10 | SW 18 | NE 6 | NNE 6 | NNE 7 | NNE 7 | SW 15 | SW 15 | W 12 | NNE 8 | NNE 8 | SW 14 | SW 14 |
Wave Graph | ||||||||||||||||||||
0 | 8 | 0 | 5 | 4 | 9 | 8 | 8 | 12 | 0 | 0 | 0 | 0 | 35 | 33 | 11 | 0 | 0 | 8 | 8 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross-on | cross | cross-off | cross | cross | glassy | on | glassy | glassy |
High Tide | 3:28PM0.72m | 3:36AM0.38m | 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 | |||||||
Low Tide | 10:13PM0.05m | 9:11AM0.01m | 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 | |||||||
— | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
6:43 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 26 | 28 | 27 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 29 | 27 | 28 | 28 | 27 |
Feels °C | 29 | 27 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 31 | 29 | 30 | 30 | 29 | 28 | 28 | 29 | 31 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | NE 5 | SSW 13 | NNE 5 | NE 5 | NNE 5 | SSW 14 | NNE 5 | NNE 6 | NNE 6 | NE 6 | NNE 6 | NNE 7 | NNE 7 | NNE 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 8 | NE 8 |
28 | 17 | 15 | 28 | 16 | 39 | 37 | 30 | 46 | 54 | 32 | 61 | 78 | 42 | 93 | 130 | 60 | 120 | 147 | 95 | |
Swell 2 Height (m) Direction Period (s) | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | NNE 7 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | NE 7 | SSW 16 | SSW 15 | SW 15 | SW 15 | SSW 14 | NE 9 | SSW 18 | SSW 18 | SSW 16 |
27 | 25 | 24 | 44 | 42 | 9 | 18 | 34 | 16 | 15 | 8 | 25 | 22 | 35 | 33 | 20 | 36 | 31 | 61 | 51 | |
Swell 3 Height (m) Direction Period (s) | SSW 14 | W 10 | SSW 12 | N 8 | N 7 | W 11 | W 10 | W 10 | SW 18 | SSW 17 | SSW 17 | SSW 12 | S 12 | W 11 | S 11 | W 12 | SSW 14 | SSW 14 | SW 14 | SW 14 |
18 | 8 | 15 | 5 | 4 | 9 | 8 | 8 | 12 | 28 | 27 | 14 | 11 | 9 | 9 | 11 | 20 | 20 | 8 | 8 | |
Wind waves Height (m) Direction Period (s) | — | NNE 5 | — | — | — | NNE 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | 17 | — | — | — | 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 94 | 38 | 94 | 94 | 42 | 94 | 38 | 41 | 88 | 88 | 29 | 88 | 29 | 38 | 39 | 38 | 29 | 88 | 46 | 29 |
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.











