Surf Forecasts:
Sixtynine surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 5PM (local time) - 5ft (1.5m), 14s period, WSW swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 11PM (local time) - 6ft (1.8m), 14s period, WSW swell with 1,230 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 5PM (local time) - 3.5ft (1.0m), 11s 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 5PM. The primary swell is predicted to be 1.0m and 11s 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 1.8m 14s and forecast to arrive on Monday (Sep 07) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 12s period and expected on Saturday (Sep 05) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Sun 6th Sep) | 3.5ft (1.0m) 11s |
| Best Surf | 5PM (Mon 7th Sep) | 5ft (1.5m) 14s |
| Most Powerful | 11PM (Mon 7th Sep) | 6ft (1.8m) 14s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s on the radar for the next couple of weeks. To be straight with you, it’s a pretty quiet outlook for the area. We’ve got a long stretch of nothing much at the start, and the real action is tucked away in a short window that’s worth keeping an eye on, even if it’s a bit of a wait.
The first few days, from the 5th right through the morning of the 7th of September, are a write-off. Flat, poor conditions, just nothing to get excited about. You’re looking at a solid two-day gap of no surf.
Then, things finally get interesting. Around midday on Sunday the 6th, a little pulse of 3ft swell from the SW starts to trickle in, but it’s the afternoon of Monday the 7th that’s the real standout. We’re talking about Sixtynine. That Monday afternoon, a 5ft groundswell from the WSW rolls in with a long 14-second period and the wind goes glassy. The wave energy is cooking at a solid 857 (moderate). That’s the best we’re going to see. The swell direction is lining up nicely with the optimum, and with that glassy wind, it’s going to be clean. Keep in mind that with a period over 11 seconds, you’ll get longer lulls between sets, but the shape should be good. It’s a fairly exposed spot, and crowds are possible sometimes, so get down early if you can. The water temperature feels about average for this time of year.
After that, it’s back to the drawing board. The surf drops off quickly. Tuesday the 8th still has some 5ft to 5ft swell from the W and WSW, but the wind is onshore or light, ruining the quality. By Wednesday the 9th, we’re down to ankle-snappers. The rest of the week and into the second week – from the 9th through to the 20th of September – is a long, dry spell. There’s very little energy, mostly tiny waves under 2ft, and often periods of onshore or cross-onshore winds. It’s flat, and it’s going to stay flat for days on end. The energy readings are mostly in the teens or single digits, which is just weak. A blank run like this is pretty normal for this stretch.
So, the short story: Monday afternoon the 7th of September is your one and only real shot. Don’t sleep on it.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sun afternoon. Warm (max 29°C on Sun morning, min 25°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Tue afternoon. Warm (max 29°C on Tue morning, min 24°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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 12 | SSW 12 | SSW 12 | SW 11 | SW 12 | SW 11 | SW 12 | SW 13 | WSW 14 | WSW 13 | WSW 11 | W 11 | W 10 | WNW 9 | WNW 7 | SW 7 | SW 16 | SW 18 | NE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 0 | 0 | 0 | 0 | 0 | 250 | 330 | 569 | 857 | 1155 | 637 | 533 | 204 | 61 | 16 | 8 | 42 | 49 | 0 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | on | glassy | on | glassy | glassy | on | glassy | glassy | on | on | glassy | cross-on | cross-off | cross-off | cross | glassy | cross-off |
High Tide | 10:08PM0.17m | 11:57AM0.69m | 00:08AM0.19m | 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 | ||||||
Low Tide | 3:40AM0.04m | 7:52PM0.09m | 5:12AM0.03m | 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 | |||||||
 |  |  |  | |  |  | | | | | |  | | | | | | | |
 | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 6:36 | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — |
mm | — | — | — | — | — | 3 | 2 | — | — | — | — | 2 | 1 | — | — | — | — | — | — |
Temp °C | 26 | 28 | 28 | 27 | 29 | 28 | 27 | 28 | 29 | 28 | 29 | 28 | 27 | 29 | 29 | 27 | 28 | 27 | 25 |
Feels °C | 26 | 30 | 31 | 32 | 32 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 32 | 31 | 31 | 30 | 29 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 12 | NNE 6 | SW 11 | SW 12 | SW 11 | SW 12 | SW 13 | WSW 14 | WSW 13 | WSW 11 | W 11 | W 10 | NE 8 | NE 6 | SW 7 | NE 5 | NE 7 | NE 8 |
| kJ | 111 | 180 | 49 | 189 | 228 | 250 | 330 | 569 | 857 | 1155 | 637 | 533 | 204 | 64 | 40 | 8 | 27 | 77 | 73 |
Swell 2 Height (m) Direction Period (s) | NNE 6 | NNE 7 | SSW 12 | NNE 6 | NNE 6 | NE 6 | ENE 12 | NE 7 | NE 7 | NE 11 | NE 11 | NE 10 | NE 8 | WNW 9 | WNW 7 | SSW 13 | ENE 8 | SW 18 | SW 16 |
| kJ | 18 | 38 | 171 | 34 | 24 | 45 | 115 | 35 | 44 | 183 | 168 | 108 | 57 | 61 | 16 | 33 | 12 | 49 | 68 |
Swell 3 Height (m) Direction Period (s) | ENE 14 | ENE 13 | ENE 14 | E 13 | ENE 12 | E 12 | NNE 6 | ENE 12 | ENE 12 | SSW 15 | SSW 15 | SSW 14 | SW 8 | SW 7 | NNE 8 | WNW 6 | SW 16 | SSW 8 | ENE 13 |
| kJ | 63 | 57 | 61 | 86 | 86 | 72 | 25 | 117 | 127 | 91 | 84 | 81 | 41 | 19 | 22 | 4 | 42 | 6 | 17 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 7 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 75 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 38 | 5 | 3 | 3 | 5 | 0 | 0 | 5 | 0 | 0 | 88 | 8 | 0 | 5 | 46 | 29 | 29 | 88 | 5 |
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.
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