Surf Forecasts:
Sixtynine surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 8PM (local time) - 7ft (2.2m), 13s period, WSW swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 5PM (local time) - 7.5ft (2.3m), 14s period, WSW swell with 2,089 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 2PM (local time) - 3.5ft (1.1m), 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 2PM. The primary swell is predicted to be 1.1m 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 2.3m 14s and forecast to arrive on Monday (Sep 07) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 13s period and expected on Sunday (Sep 06) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sun 6th Sep) | 3.5ft (1.1m) 12s |
| Best Surf | 8PM (Mon 7th Sep) | 7ft (2.2m) 13s |
| Most Powerful | 5PM (Mon 7th Sep) | 7.5ft (2.3m) 14s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s on the table for Sixtynine over the next couple of weeks.
Honestly, it’s a pretty grim start. We’ve got a dead flat spell running from Friday the 4th right through the first week. Nothing but small ripples and glassy mornings, but no surf to speak of. That’s a solid 10 days of flatness before anything even worth mentioning shows up.
The first real pulse arrives on Monday the 7th of September. The morning brings a 6ft swell from the southwest, with a long period of 15 seconds, and combined swell energy is 1619 (moderate to strong). Afternoon sees it bump up to 8ft from the west-southwest, period 14 seconds, and energy jumps to 2089 (strong). The catch? Wind is onshore from the west at 6 mph both sessions, which is gonna mess with the shape. The wave comment says “marginal surf forecast or questionable tide conditions,” so this isn’t the clean, easy ride you’d hope for. With that size, it’s pushing into expert territory—over 8ft in the afternoon, so only for the experienced. That long period groundswell, over 15 seconds in the morning, is better suited to a point or reef, but Sixtynine is a fairly exposed spot, so it might break a bit too straight for a beach break.
Tuesday the 8th drops off quickly. Morning has 5ft from the west at 11 seconds, energy 595 (moderate), but still onshore wind. Afternoon drops to 4ft from the west-northwest at 10 seconds, energy 372 (moderate), wind goes light onshore from the northwest. Still marginal. By Wednesday morning the 9th, it’s back to tiny 1ft junk and flat again. The rest of the week and into the second week is a ghost town—nothing but zeros and tiny wind swell, most days glassy or cross-off but no height to work with.
The only half-decent window is Monday the 7th, but with the onshore wind and marginal conditions, it’s not a standout. There’s nothing else in the 16-day window that’s worth paddling out for. If you’re desperate, dawn on Monday the 7th might offer a few lumpy ones for a big-wave crew, but don’t expect any magic.
As for the water, when we do see a bit of swell on the 7th, the temperature is 82°F with a 1°F anomaly—about average for this time of year, so no wetsuit needed.
Sorry folks, this stretch is a write-off. The forecasts can change, but right now, it’s time to wax the car, not the board.
- Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Sun afternoon. Warm (max 29°C on Sun morning, min 25°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue afternoon. Warm (max 29°C on Mon afternoon, min 23°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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) | S 12 | N 8 | SSW 12 | SSW 12 | SW 12 | SW 12 | SW 13 | SW 13 | SW 14 | SW 15 | WSW 14 | WSW 12 | W 11 | WNW 10 | WNW 8 | W 6 | SW 7 | NE 7 | SW 16 | SW 18 | NE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 647 | 1619 | 2089 | 1036 | 517 | 306 | 72 | 12 | 8 | 0 | 42 | 49 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | glassy | glassy | cross-off | cross-on | glassy | glassy | on | on | cross | on | on | glassy | cross-on | cross | cross-off | cross | cross-off | cross-off |
High Tide | 10:42AM0.65m | 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 | 7:06PM0.15m | 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 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — | 2 | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 26 | 28 | 28 | 26 | 29 | 28 | 27 | 28 | 29 | 28 | 29 | 28 | 27 | 29 | 29 | 26 | 27 | 28 | 26 |
Feels °C | 31 | 29 | 27 | 30 | 31 | 30 | 33 | 32 | 32 | 31 | 32 | 33 | 32 | 32 | 32 | 32 | 33 | 30 | 27 | 29 | 26 |
Swell 1 Height (m) Direction Period (s) | NE 6 | SSW 12 | NNE 5 | SSW 12 | SW 12 | SW 12 | SW 13 | SW 13 | SW 14 | SW 15 | WSW 14 | WSW 12 | W 11 | WNW 10 | WNW 8 | NE 5 | NE 6 | SSW 13 | NE 7 | NE 7 | NE 8 |
| kJ | 52 | 115 | 26 | 180 | 212 | 282 | 424 | 488 | 647 | 1619 | 2089 | 1036 | 517 | 306 | 72 | 12 | 39 | 33 | 51 | 51 | 77 |
Swell 2 Height (m) Direction Period (s) | S 12 | E 14 | SSW 12 | NNE 6 | ENE 14 | NNE 6 | NE 6 | NE 6 | NNE 6 | ENE 12 | ENE 12 | NE 12 | NE 10 | NE 9 | NE 8 | NNE 8 | NE 8 | SSW 7 | SW 16 | SW 18 | SW 16 |
| kJ | 76 | 16 | 129 | 36 | 61 | 32 | 38 | 58 | 25 | 175 | 167 | 224 | 127 | 84 | 55 | 23 | 14 | 5 | 42 | 49 | 67 |
Swell 3 Height (m) Direction Period (s) | E 14 | N 8 | ENE 14 | ENE 13 | NNE 10 | E 13 | E 12 | E 12 | ENE 12 | NNE 7 | NNE 7 | SSW 16 | SW 9 | SW 8 | SW 8 | W 6 | SW 7 | ENE 12 | ENE 12 | ENE 13 | ENE 13 |
| kJ | 15 | 1 | 63 | 57 | 20 | 86 | 78 | 72 | 113 | 16 | 26 | 80 | 78 | 66 | 35 | 12 | 8 | 15 | 15 | 18 | 16 |
Wind waves Height (m) Direction Period (s) | — | NE 6 | — | — | NE 6 | — | — | — | — | — | — | — | — | — | — | — | — | NE 7 | — | — | — |
| kJ | — | 54 | — | — | 54 | — | — | — | — | — | — | — | — | — | — | — | — | 71 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 97 | 29 | 5 | 3 | 3 | 3 | 5 | 3 | 0 | 8 | 8 | 3 | 31 | 8 | 0 | 88 | 97 | 38 | 88 | 88 | 5 |
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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