
Surf Forecasts:
Sixtynine surf forecast from 13 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 5AM (local time) - 1ft (0.3m), 21s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 16 Sep, 8PM (local time) - 1.5ft (0.4m), 18s period, SW swell with 109 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 5AM (local time) - 1ft (0.3m), 21s 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 Tuesday (Sep 15) at 5AM. The primary swell is predicted to be 0.3m and 21s 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 0.4m 18s and forecast to arrive on Wednesday (Sep 16) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Thursday (Sep 17) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 15th Sep) | 1ft (0.3m) 21s |
| Best Surf | 5AM (Tue 15th Sep) | 1ft (0.3m) 21s |
| Most Powerful | 8PM (Wed 16th Sep) | 1.5ft (0.4m) 18s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s coming up at Sixtynine.
Honestly, mate, it’s a pretty grim run for the next couple of weeks. We’re looking at a long stretch of flat or near-flat conditions, with nothing really surfable for the first 12 days. The only glimmer in the whole 16-day window pops up right at the end, but even that’s not exactly setting the world on fire.
From Sunday the 13th right through to Friday the 25th of September, it’s a desert. Tiny dribbles here and there, but nothing worth paddling out for. Most of the time the swell height is a flat zero, and when there is something, it’s barely a ripple – like that 0.7ft on the Sunday afternoon, or a 2ft on Monday the 14th with a short 5-second period. That’s just messy, weak stuff. The combined swell energy during that whole period barely cracks double digits, usually sitting at 0 or in the single digits, which is as weak as it gets. Wind is often light or glassy, but with no swell to push, it doesn’t matter.
We finally see a pulse on Friday the 25th of September in the afternoon. A tiny 1ft swell from the north, with a 12-second period – so there’s a little bit of groundswell energy in there (combined energy of 69). Winds go glassy, which is a massive plus. It’s rated as surfable but very ordinary. That’s the only time in the whole forecast you could even think about getting wet.
Then Saturday the 26th and Sunday the 27th see a few more small 1ft pulses, but the wind turns cross-on, making it choppy, and the energy is low (20 or less). By Monday the 28th, there’s another 1ft with a long 18-second period, but the wind is onshore and it’s still in the "poor" category.
So, the one and only standout – and I use that term loosely – is that Friday afternoon, 25th of September. If you’re desperate, you might find a grovelly little wave at Sixtynine when the wind drops to glass. It’s a fairly exposed spot, and the optimum direction is WNW, so that north pulse isn't ideal, but a glassy 1ft with a bit of period is about all we’ve got. This break is consistent, so this flat spell is unusual – it won’t last forever, but right now, it’s a tough watch.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sat night. Warm (max 29°C on Tue morning, min 25°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Thu afternoon. Warm (max 30°C on Wed morning, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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 14 | NNE 9 | W 11 | NNE 8 | SW 14 | NNE 5 | SSW 21 | SW 20 | SW 19 | SW 19 | SW 12 | SW 18 | SW 17 | SW 16 | NE 7 | W 9 | SW 18 | W 9 | W 9 |
Wave Graph | |||||||||||||||||||
29 | 0 | 9 | 0 | 7 | 12 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 6 | 0 | 2 | 6 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | cross-off | on | glassy | glassy | on | glassy | cross-off | cross | cross | cross-off | cross | glassy | glassy | on | glassy | cross-off |
High Tide | 5:28AM0.61m | 5:15PM0.47m | 6:08AM0.62m | 5:43PM0.39m | 6:50AM0.62m | 6:10PM0.32m | 7:39AM0.59m | 6:37PM0.25m | 8:41AM0.57m | 7:08PM0.20m | 10:00AM0.55m | 9:49PM0.17m | |||||||
Low Tide | 11:00PM-0.01m | 11:39AM0.10m | 11:22PM-0.00m | 12:31PM0.14m | 11:45PM0.02m | 1:34PM0.18m | 00:09AM0.04m | 3:00PM0.20m | 00:37AM0.07m | 5:26PM0.20m | 1:16AM0.10m | 7:14PM0.16m | 2:31AM0.12m | ||||||
— | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | |
6:28 | — | 6:28 | — | — | 6:27 | — | — | 6:25 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — | |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — | 2 | 1 |
Temp °C | 26 | 27 | 27 | 26 | 28 | 28 | 27 | 29 | 28 | 27 | 30 | 30 | 28 | 29 | 29 | 27 | 29 | 28 | 26 |
Feels °C | 30 | 31 | 31 | 29 | 30 | 30 | 30 | 32 | 32 | 30 | 32 | 32 | 31 | 32 | 33 | 32 | 32 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | NNE 9 | NNE 9 | NNE 9 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 5 | NNE 5 | SW 18 | NE 5 | NNE 8 | NNE 6 | NE 7 | NE 8 | NE 7 | NE 7 | NE 7 |
88 | 68 | 88 | 48 | 46 | 26 | 24 | 41 | 22 | 16 | 79 | 29 | 26 | 41 | 118 | 96 | 100 | 115 | 77 | |
Swell 2 Height (m) Direction Period (s) | SW 14 | SSW 12 | W 11 | NNE 4 | NE 4 | SSW 22 | SSW 21 | SW 20 | NNE 8 | NNE 8 | NNE 7 | SW 18 | SW 17 | ENE 10 | SW 16 | SW 17 | SW 18 | SW 17 | SW 16 |
29 | 15 | 9 | 7 | 4 | 46 | 45 | 98 | 23 | 19 | 21 | 152 | 75 | 38 | 64 | 148 | 78 | 145 | 129 | |
Swell 3 Height (m) Direction Period (s) | WNW 11 | SSW 15 | SSW 15 | SSW 14 | SW 14 | SSW 14 | SSW 13 | NNE 10 | SW 19 | SW 19 | SW 12 | NNE 9 | ENE 10 | SW 16 | SSW 18 | W 9 | SSW 17 | W 9 | W 9 |
12 | 22 | 21 | 20 | 7 | 18 | 17 | 9 | 96 | 94 | 5 | 16 | 9 | 65 | 33 | 6 | 28 | 2 | 6 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNE 5 | NNE 4 | — | — | — | NNE 5 | — | NE 5 | — | — | — | — | — | — |
— | — | — | — | — | 12 | 7 | — | — | — | 16 | — | 24 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 57 | 88 | 94 | 38 | 88 | 94 | 38 | 5 | 5 | 5 | 8 | 3 | 5 | 29 | 5 | 3 | 5 | 3 | 3 |
Best forecast wave conditions in Big Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










