
Surf Forecasts:
Sixtynine surf forecast from 6 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 2AM (local time) - 5ft (1.6m), 13s period, WSW swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 5ft (1.6m), 13s period, WSW swell with 875 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 11PM (local time) - 3.5ft (1.0m), 12s 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 Sunday (Sep 06) at 11PM. The primary swell is predicted to be 1.0m and 12s 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 1.6m 13s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 11s period and expected on Sunday (Sep 06) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 6th Sep) | 3.5ft (1.0m) 12s |
| Best Surf | 2AM (Tue 8th Sep) | 5ft (1.6m) 13s |
| Most Powerful | 2AM (Tue 8th Sep) | 5ft (1.6m) 13s |
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 on the cards for this stretch of coast. I won’t sugarcoat it – the next couple of weeks are looking pretty lean, so don’t be in a rush to grab your board.
First up, we’ve got Sixtynine. This spot is a fairly exposed intermediate break, and it likes a WNW swell. The water temp is sitting at 82°, which is a touch warmer than average for this time of year, so you’ll be comfortable in a shorty.
The forecast gets off to a quiet start. Sunday the 6th is a write-off with risk of thunderstorms and no surf to speak of. Monday the 7th barely gets a pulse with a 3 ft SW swell, but the period is 11 seconds, so there’s a little bit of shape. Winds are light and onshore though, so it’s messy. The energy is weak at just 205.
There’s a slight bump on Tuesday the 8th. The swell pushes up to 5 ft from the WSW with an 11-second period, and the combined energy hits 550 (moderate). But the wind is cross-onshore, so it’s not clean. You might find a couple of bumpy ones, but it’s not worth getting excited about. The afternoon drops to 5 ft and 399 energy, still with that cross-onshore breeze.
After that, it’s a long dry spell. From Wednesday the 9th all the way through to Tuesday the 15th, we’re looking at tiny, weak swells – mostly under 1 ft and energy values in the single digits or low double digits. Winds are light and variable, sometimes glassy, but there’s just no push. The period on the 10th is a long 16-18 seconds, but with only 1 ft of swell, it’s just a long-period wobble on the water. Not surfable.
A glimmer shows up on Wednesday the 16th. The afternoon brings a 1 ft SW swell with an 18-second period, and the energy climbs to 109 (moderate). The wind goes glassy, which is a huge positive. The waves are there, but the conditions are described as very ordinary. It’s a small window for a micro-session, but don’t expect much.
The next hint of life comes on Sunday the 20th. We’ve got a 2 ft W swell, 14-second period, and energy of 165 (moderate). The morning has light onshore winds, but the afternoon turns glassy, and the waves are surfable but still very ordinary. That’s the best of the bunch, but it’s a far cry from pumping.
Looking at the whole 16-day window, there’s no standout day. The best on offer is probably the afternoon of Sunday the 20th at Sixtynine, with a 2 ft W swell and glassy conditions. But even then, it’s small and weak. The crowd factor at Sixtynine is “sometimes,” so you might have the place to yourself, which is about the only upside.
For the rest of the time, you’re looking at a lot of flat, glassy days with no energy. It’s a tough stretch. If you’re desperate for a paddle, the 20th is your best bet, but keep your expectations low.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun morning. Warm (max 30°C on Tue morning, min 26°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Wed afternoon. Warm (max 29°C on Wed afternoon, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | SW 11 | SW 12 | SW 13 | SW 11 | SW 11 | WSW 13 | WSW 11 | WSW 10 | WNW 9 | WNW 8 | WNW 7 | NE 7 | SW 16 | SW 18 | SW 16 | SW 10 | SW 9 | SW 15 | SW 15 | SW 14 | SW 14 |
Wave Graph | |||||||||||||||||||||
0 | 0 | 437 | 205 | 202 | 875 | 550 | 399 | 135 | 51 | 10 | 0 | 42 | 50 | 42 | 24 | 22 | 0 | 0 | 29 | 29 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | on | cross-on | glassy | cross-on | cross-on | glassy | on | cross-on | glassy | cross | cross | cross-off | cross-on | glassy | glassy | cross-on | glassy | glassy |
High Tide | 12:59PM0.72m | 1:17AM0.24m | 1:49PM0.75m | 2:08AM0.31m | 2:32PM0.75m | 2:51AM0.39m | 3:10PM0.73m | 3:32AM0.46m | 3:45PM0.69m | 4:11AM0.53m | 4:16PM0.63m | 4:50AM0.58m | 4:46PM0.55m | ||||||||
Low Tide | 8:26PM0.06m | 6:29AM0.01m | 8:55PM0.03m | 7:32AM-0.01m | 9:22PM0.01m | 8:26AM-0.02m | 9:48PM-0.01m | 9:15AM-0.00m | 10:13PM-0.02m | 10:03AM0.02m | 10:37PM-0.02m | 10:50AM0.06m | 11:00PM-0.01m | ||||||||
6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
— | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | |
mm | 1 | 1 | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 27 | 28 | 29 | 28 | 30 | 29 | 27 | 28 | 29 | 27 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 32 | 32 | 32 | 31 | 32 | 32 | 33 | 32 | 32 | 32 | 33 | 31 | 30 | 30 | 29 | 29 | 30 | 29 | 29 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 12 | SW 13 | SW 11 | SW 11 | WSW 13 | WSW 11 | WSW 10 | WNW 9 | WNW 8 | NE 6 | NE 7 | SW 16 | SW 18 | NE 7 | NNE 8 | NE 5 | NNE 7 | NNE 8 | NNE 8 | NNE 8 |
182 | 244 | 437 | 205 | 202 | 875 | 550 | 399 | 135 | 51 | 34 | 60 | 42 | 50 | 53 | 43 | 35 | 41 | 52 | 25 | 56 | |
Swell 2 Height (m) Direction Period (s) | NE 6 | NE 7 | NE 7 | NE 6 | NE 7 | NE 12 | NE 11 | NE 10 | NE 8 | NNE 8 | NNE 7 | SSW 13 | SSW 13 | SW 11 | SW 10 | SW 10 | NNE 8 | SW 15 | SW 15 | SW 14 | SW 14 |
39 | 73 | 47 | 68 | 47 | 158 | 168 | 117 | 58 | 42 | 20 | 34 | 16 | 18 | 37 | 24 | 22 | 57 | 60 | 29 | 29 | |
Swell 3 Height (m) Direction Period (s) | E 12 | ENE 12 | ENE 12 | ENE 12 | ENE 12 | SSW 16 | SSW 15 | SSW 14 | SW 8 | SW 7 | WNW 7 | SSW 7 | WNW 10 | SSW 13 | SW 16 | SW 16 | SW 9 | ENE 11 | ENE 10 | ENE 10 | W 11 |
73 | 47 | 81 | 79 | 109 | 81 | 84 | 81 | 46 | 14 | 10 | 5 | 10 | 16 | 42 | 66 | 22 | 23 | 20 | 9 | 9 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | NE 7 | NNE 5 | — | — | — | — | — | NNE 4 | — |
— | — | — | — | — | — | — | — | — | — | — | — | 71 | 29 | — | — | — | — | — | 13 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 3 | 0 | 8 | 8 | 0 | 31 | 8 | 0 | 84 | 46 | 38 | 5 | 5 | 0 | 8 | 88 | 84 | 88 | 57 | 41 |
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.










