Surf Forecasts:
Sixtynine surf forecast from 27 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 Tuesday (Sep 01) at 5PM.
| 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
Alright folks, Rusty here. Let’s have a look at what’s cookin’ over at Sixtynine for the next couple of weeks.
Straight up, it’s a tough stretch. We’ve got a solid 16-day window, but the opening days are a real bust. Thursday the 27th of August through the end of the month is flat as a pancake, with combined swell energy at zero and the water just sitting there at 82°. The water’s a touch warmer than normal for this time of year, about 1° above average, but that’s all the excitement you’re gonna get.
We finally see a tiny bump of life on Monday the 31st of August. A sneaky little 1ft of swell from the SW with a 15-second period shows up, giving us a combined energy of 33 (weak). It’s not much, but that long period groundswell has a little bit of push. Winds are cross from the NNE at 12 mph, which isn’t ideal – makes for a bit of chop. Tuesday the 1st of September goes back to nothing, and the rest of that first week is just a dribble of knee-high slop.
The second week doesn’t offer much redemption. The standout moment, if you can call it that, is the afternoon of Saturday the 5th of September. We get a glassy calm with 1ft from the W at a 12-second period and a combined energy of 18 (weak). That glassy condition is the only real positive in the whole run. It’s tiny but clean for a moment. Then we get another glassy patch on Monday the 7th, but again, no swell to work with.
Right at the tail end, on Thursday the 10th and Friday the 11th of September, we see a bit more juice. A 1ft SW groundswell with a period of 16 seconds and combined energy climbing to 65 (still weak). That’s the biggest energy we see, but the wind is onshore from the WNW, ruining any potential.
Bottom line: there’s nothing here that’s worth paddling out for. The whole 16-day block is a write-off for surf. The swell is tiny, the winds are mostly messy, and the energy never gets above weak. For a spot like Sixtynine that’s fairly exposed, this is more about waiting for a proper pulse than chasing this dribble. Forecasts can change, but right now, leave your board in the car. Keep an eye on the sky, though – that glassy late-week window on the 5th and 7th might have surprised us if there was any swell.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Thu morning, min 25°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sun morning, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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) | SSW 16 | N 8 | N 7 | SW 11 | NNE 5 | W 10 | SW 18 | NNE 6 | SW 17 | NNE 7 | NNE 7 | SW 15 | SW 15 | W 12 | SW 14 | NNE 8 | NE 8 | W 11 | W 12 | W 10 | W 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 5 | 4 | 4 | 0 | 8 | 12 | 0 | 44 | 0 | 0 | 36 | 33 | 11 | 33 | 0 | 0 | 10 | 11 | 8 | 8 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross | cross-off | on | cross-on | glassy | on | on | cross-off |
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 | 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 | 2:57PM0.22m | 1:24AM0.00m | |||||||
 |  |  | | | | | |  | | | | | | | | | | |  |  | |
 | 6:05 | — | — | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 |
Temp °C | 28 | 28 | 25 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 25 | 27 | 28 | 26 | 28 | 28 | 27 | 28 | 28 | 26 |
Feels °C | 30 | 30 | 27 | 29 | 29 | 29 | 30 | 28 | 29 | 30 | 30 | 25 | 27 | 28 | 27 | 30 | 30 | 31 | 30 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | NNE 5 | NE 5 | NNE 5 | SSW 14 | NNE 5 | NE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 7 | NNE 7 | NNE 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 8 | NE 8 | SSW 16 | NNE 7 | NNE 7 |
| kJ | 16 | 29 | 13 | 39 | 23 | 32 | 27 | 65 | 36 | 61 | 81 | 41 | 76 | 130 | 60 | 114 | 140 | 93 | 50 | 114 | 70 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | NNE 7 | NNE 6 | SSW 13 | SSW 13 | SSW 12 | SW 17 | SSW 16 | SSW 15 | SW 15 | SW 15 | SSW 14 | NE 9 | SSW 18 | SSW 18 | SSW 16 | W 12 | SSW 15 | SSW 15 |
| kJ | 24 | 44 | 42 | 9 | 8 | 34 | 16 | 15 | 44 | 25 | 22 | 36 | 33 | 20 | 37 | 31 | 31 | 51 | 11 | 45 | 42 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | N 8 | N 7 | SW 11 | SSW 13 | W 10 | SW 18 | SSW 17 | SSW 12 | SSW 12 | S 12 | W 11 | S 11 | W 12 | SW 14 | SSW 14 | SSW 14 | W 11 | E 15 | W 10 | W 10 |
| kJ | 15 | 5 | 4 | 4 | 18 | 8 | 12 | 28 | 14 | 14 | 11 | 9 | 9 | 11 | 33 | 20 | 20 | 10 | 5 | 8 | 8 |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 8 | — | — |
| kJ | — | — | — | 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 103 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 94 | 94 | 38 | 92 | 94 | 38 | 88 | 29 | 42 | 88 | 105 | 38 | 94 | 29 | 29 | 88 | 88 | 29 | 88 | 88 | 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.
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