Surf Forecasts:
Sixtynine surf forecast from 12 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 cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Thursday (Sep 17) at 2PM.
| 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 have a look at what Sixtynine has in store. Honestly, it’s a real quiet stretch ahead. The whole 16-day window is almost a blank canvas, so we’re not talking about a proper surf outlook here. The first couple of days, Saturday the 12th and Sunday the 13th, are basically a write-off. We see tiny, weak swell popping up – wave heights barely hitting 1 ft with no real energy to speak of – but they’re accompanied by poor surf conditions and that’s the story for most of this run.
The first time we even see a slightly interesting pulse is on Sunday the 20th. A small, long-period groundswell arrives from the SW, pushing 1 ft with a period of 15 seconds. The combined swell energy is weak at 33. Winds are light and glassy in the afternoon, which is about the only bright spot. But 1 ft even with a long period is not exactly going to get the heart racing. It’s possible for a longboard or a foiler, but for a standard surfer, it’s pretty minimal.
Then we move toward the tail end of the forecast. Late on Saturday the 26th into Sunday the 27th, there’s a notable jump. On Sunday morning, the 27th, we see the biggest swell of the window: 2.3 ft from the north with a very long period of 13 seconds. Combined energy pushes into the moderate zone at 200. This is the standout, but only in relative terms. The wind is light cross-onshore in the morning, shifting to a light cross-shore in the afternoon. For Sixtynine, which is fairly exposed to westerly swells and consistent, this northerly direction isn’t ideal. The long-period groundswell can shape up okay here, but with these sizes, it’s more of a long-period bump than a proper wave. The water temp is 81.9°, about 1.6° warmer than normal for this time of year – so just a touch above average, nothing wild.
If you’re desperate for a paddle in the last week, keep an eye on the 27th as the best bet, but manage expectations. It's been a long, quiet run and this area hasn't given us much to work with. Stay tuned, forecasts can always change.
Short Range ForecastLight rain (total 2mm), mostly falling on Sat night. Warm (max 28°C on Sat afternoon, min 25°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Thu afternoon. Warm (max 29°C on Tue morning, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 15 | SW 14 | SW 14 | NNE 9 | W 11 | NNE 8 | W 10 | NNE 4 | SSW 21 | SW 20 | SW 19 | WSW 8 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 17 | SW 18 | SW 17 | SW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 29 | 29 | 0 | 9 | 0 | 8 | 11 | 0 | 0 | 0 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | glassy | cross-on | cross | cross-off | on | glassy | glassy | on | glassy | cross-off | cross | cross | cross-off | cross | glassy | cross-off | on | cross-on | glassy |
High Tide | 4:46PM0.55m | 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 | 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 | 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 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | 6:28 | — | — | 6:28 | — | — | 6:27 | — | — | 6:25 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — |
mm | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 2 | 1 |
Temp °C | 27 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 27 |
Feels °C | 29 | 31 | 30 | 31 | 31 | 28 | 31 | 30 | 30 | 32 | 33 | 31 | 32 | 32 | 30 | 32 | 33 | 31 | 33 | 33 | 32 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | NNE 8 | NNE 8 | NNE 8 | NNE 4 | NNE 8 | NE 6 | NNE 7 | NE 5 | NE 6 | SW 17 | NNE 6 | NNE 7 | NNE 7 | NE 5 | NE 7 | NE 7 |
| kJ | 43 | 67 | 99 | 68 | 68 | 48 | 61 | 26 | 7 | 52 | 24 | 48 | 21 | 31 | 75 | 41 | 90 | 41 | 27 | 52 | 60 |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 14 | SSW 12 | W 11 | NNE 4 | SW 14 | SSW 22 | NNE 8 | SW 20 | NNE 8 | SW 19 | SW 18 | SW 18 | NNE 8 | SW 16 | ENE 9 | SW 17 | SW 18 | SW 17 | SW 16 |
| kJ | 60 | 29 | 29 | 15 | 9 | 11 | 7 | 46 | 24 | 98 | 23 | 94 | 79 | 152 | 13 | 65 | 29 | 148 | 78 | 145 | 127 |
Swell 3 Height (m) Direction Period (s) | ENE 10 | WSW 8 | WNW 11 | SSW 15 | SSW 15 | SSW 14 | W 10 | SSW 14 | SSW 21 | NNE 10 | SW 19 | WSW 8 | NNE 7 | NNE 7 | ENE 8 | ENE 10 | SW 16 | ENE 9 | NNE 7 | NNE 7 | SW 9 |
| kJ | 9 | 7 | 12 | 22 | 21 | 20 | 8 | 18 | 45 | 9 | 96 | 7 | 18 | 20 | 6 | 32 | 64 | 31 | 9 | 16 | 3 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNE 4 | — | — | NNE 4 | — | — | — | — | — | — | NNE 5 | — | — | — | — | — | — |
| kJ | — | — | — | — | 7 | — | — | 11 | — | — | — | — | — | — | 37 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 88 | 88 | 42 | 88 | 38 | 38 | 75 | 94 | 46 | 5 | 5 | 5 | 5 | 3 | 5 | 94 | 29 | 3 | 5 | 5 | 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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