Surf Forecasts:
Sixtynine surf forecast from 9 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, 2PM (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 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 7s period and expected on Thursday (Sep 10) at 8AM.
| 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 | 2PM (Wed 16th Sep) | 1.5ft (0.4m) 18s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you – the outlook for Sixtynine over the next 16 days is a bit of a flat spell. We’re looking at a long stretch of tiny, weak waves. The first real pulse of surf isn’t until Thursday the 18th.
For the first week, it’s all about ankle-snappers and poor conditions. Wednesday the 9th gives us a tiny 2ft from the west, but the wind is on it and the energy is a paltry 22. Not worth getting wet. Friday the 11th afternoon shows a glimmer of hope with glassy conditions, but the swell is still only 1ft. The water temp is 82°F, which is about average for this time of year, so at least the water’s warm for the wait.
We’re looking at a real blank run from Saturday the 12th right through to Wednesday the 17th. Most of those days have zero swell energy. You’d be better off waxing your board at home.
Then, on Thursday the 18th, the outlook finally wakes up. The morning shows a pulse of 1ft swell from the southwest with a long period of 17 seconds from a groundswell. The energy jumps to 107 (moderate), which is the best we’ll see. The wind is a light cross-onshore, but the period is long, so it’ll have a bit more push than the rest. With that long period, it’s not going to be a standout at a beach break, but Sixtynine is fairly exposed to the WNW and the optimum swell direction is WNW, so the direction is a bit off. Still, this is the best on offer.
The rest of the run into the 24th stays tiny, with the wind often switching to a light cross or glassy, but the waves just don’t have the size. A few pulses on the 20th and 21st show some 1.0ft swell and moderate energy (33-48), but they’re just not enough.
So, the honest truth: the only real chance for a surf is Thursday the 18th morning. It’s not a classic, but it’s the only pulse of energy we’ve got. Keep your expectations low.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Wed afternoon. Warm (max 29°C on Wed morning, min 25°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sun afternoon, min 25°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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) | W 7 | W 6 | NE 7 | SW 16 | SW 18 | SW 16 | SW 10 | SW 9 | SW 15 | SW 14 | SW 14 | SW 14 | NE 9 | W 11 | W 11 | W 10 | W 10 | NNE 8 | WSW 9 | WSW 9 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 22 | 11 | 0 | 42 | 49 | 0 | 14 | 21 | 0 | 0 | 29 | 29 | 0 | 9 | 9 | 8 | 11 | 0 | 8 | 8 | 7 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | cross-on | cross-off | cross-off | cross-on | glassy | glassy | on | glassy | glassy | on | cross | cross-off | cross-on | glassy | glassy | on | cross-on | glassy |
High Tide | 3:10PM0.73m | 3:32AM0.46m | 3:45PM0.69m | 4:11AM0.53m | 4:16PM0.63m | 4:50AM0.58m | 4:46PM0.55m | 5:28AM0.61m | 5:15PM0.47m | 6:08AM0.62m | 5:43PM0.39m | 6:50AM0.62m | 6:10PM0.32m | ||||||||
Low Tide | 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 | 11:39AM0.10m | 11:22PM-0.00m | 12:31PM0.14m | 11:45PM0.02m | 1:34PM0.18m | 00:09AM0.04m | |||||||
 |  |  | |  |  | | | | | | |  | |  | | | | | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:28 | — | — | 6:27 | — | — | 6:25 | — |
mm | — | 3 | 4 | — | 2 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 28 | 28 | 28 | 28 | 26 | 27 | 27 | 26 | 27 | 26 | 26 | 27 | 28 | 26 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 33 | 32 | 33 | 32 | 32 | 29 | 30 | 31 | 30 | 30 | 29 | 30 | 29 | 31 | 28 | 30 | 31 | 31 | 31 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | NE 8 | NE 7 | NE 7 | NE 7 | NNE 4 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 9 | NE 9 | NNE 9 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | NNE 7 |
| kJ | 44 | 55 | 49 | 67 | 55 | 12 | 26 | 51 | 37 | 43 | 64 | 65 | 79 | 49 | 62 | 61 | 45 | 55 | 37 | 48 | 36 |
Swell 2 Height (m) Direction Period (s) | W 7 | W 6 | SSW 13 | SW 16 | SW 18 | SW 16 | NE 4 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 12 | NE 5 | SSW 14 | SW 14 | SSW 22 | SSW 21 | SW 20 | SW 19 | SW 19 |
| kJ | 22 | 11 | 33 | 42 | 49 | 67 | 4 | 57 | 57 | 49 | 29 | 29 | 15 | 11 | 20 | 8 | 46 | 45 | 98 | 96 | 94 |
Swell 3 Height (m) Direction Period (s) | SW 7 | SW 7 | SSW 7 | SSW 13 | SSW 13 | NNE 8 | SW 10 | SW 9 | ENE 10 | ENE 10 | WSW 8 | WNW 11 | SSW 15 | W 11 | W 11 | W 10 | W 10 | SSW 13 | WSW 9 | WSW 9 | WSW 8 |
| kJ | 14 | 13 | 5 | 16 | 16 | 13 | 14 | 21 | 20 | 9 | 7 | 12 | 22 | 9 | 9 | 8 | 8 | 17 | 8 | 8 | 7 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 4 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 84 | 84 | 88 | 88 | 29 | 5 | 88 | 5 | 57 | 57 | 45 | 42 | 92 | 29 | 38 | 92 | 82 | 28 | 92 | 8 | 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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