Surf Forecasts:
Sixtynine surf forecast from 23 Aug 2026:
- Best quality surf: Sunday 23 Aug, 5AM (local time) - 1.5ft (0.4m), 12s period, NW swell with glassy winds.
- Most powerful swell: Sunday 23 Aug, 11AM (local time) - 1.5ft (0.5m), 12s period, WNW swell with 75 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 5AM (local time) - 1.5ft (0.4m), 12s period with NW 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 (Aug 23) at 5AM. The primary swell is predicted to be 0.4m and 12s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sixtynine in the next 16 days are 0.5m 12s and forecast to arrive on Sunday (Aug 23) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Sunday (Aug 23) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sun 23rd Aug) | 1.5ft (0.4m) 12s |
| Best Surf | 5AM (Sun 23rd Aug) | 1.5ft (0.4m) 12s |
| Most Powerful | 11AM (Sun 23rd Aug) | 1.5ft (0.5m) 12s |
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 offer.
To be straight with you, the next 16 days are looking pretty grim for a proper paddle. There’s a very small window of surfable waves right at the start, but after that, it’s a long, dry stretch. The first and only real chance comes this Sunday morning, the 23rd of August, at Sixtynine. You’ll find a small 2 ft swell from the WNW, with a 12-second period that gives it a bit of shape. The combined swell energy is weak (117), so it’s not going to be powerful, but with a light 6 mph NE cross-off breeze, the surface will be clean. The break is fairly exposed to the swell and consistent, which is a bonus. The water temp is about average for this time of year, so nothing unusual there. Crowds are sometimes a thing here, so you might have a few others out.
After that Sunday morning session, it’s basically done. From Sunday afternoon onward, all the way through to the 7th of September, the surf is consistently poor. You’ll see a few tiny waves here and there, but nothing worth getting excited about. The wind is mostly light, but the swell just dies off. There’s a long gap of over a week with no real options. Even the end of the second week, around the 6th and 7th of September, shows a bit of a bump in swell size, but the wind is onshore or cross-onshore, and the conditions are just messy. The combined energy never gets above 98, so it’s weak.
Bottom line: if you’re desperate for a surf, get out Sunday morning at Sixtynine. After that, it’s a blank run. The forecast can change, but right now, it’s looking like a long wait.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Mon afternoon. Warm (max 29°C on Sun afternoon, min 26°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Thu morning, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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) | WNW 10 | WNW 12 | WNW 11 | WNW 10 | WNW 12 | NW 11 | SSW 13 | NE 6 | W 12 | NNE 5 | SSW 15 | W 10 | SSW 16 | W 10 | W 9 | N 8 | N 7 | NE 5 | W 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 58 | 75 | 44 | 18 | 13 | 5 | 0 | 0 | 11 | 0 | 0 | 8 | 0 | 8 | 7 | 11 | 9 | 0 | 7 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross | glassy | cross-on | glassy | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | glassy | cross-off | cross-on | cross | glassy |
High Tide | 1:02AM0.20m | 1:49PM0.66m | 1:48AM0.23m | 2:26PM0.69m | 2:25AM0.28m | 2:59PM0.71m | 3:00AM0.33m | 3:28PM0.72m | 3:36AM0.38m | 3:56PM0.71m | 4:12AM0.43m | 4:24PM0.68m | 4:50AM0.48m | ||||||
Low Tide | 8:53PM0.12m | 6:05AM0.06m | 9:13PM0.10m | 7:02AM0.04m | 9:33PM0.09m | 7:49AM0.01m | 9:53PM0.07m | 8:30AM0.00m | 10:13PM0.05m | 9:11AM0.01m | 10:35PM0.03m | 9:51AM0.02m | 10:57PM0.01m | ||||||
 |  | |  | |  |  |  | | | | | | | | | | | | |
 | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 6:46 | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:42 | — |
mm | — | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 28 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 26 | 27 | 27 | 25 | 28 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 30 | 31 | 32 | 30 | 32 | 32 | 31 | 30 | 31 | 27 | 28 | 29 | 26 | 29 | 30 | 29 | 29 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 12 | NNE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | SSW 12 | SSW 14 | NNE 5 | SSW 17 | NNE 5 | SSW 16 | SSW 15 | NNE 5 | N 7 | NE 5 | N 6 |
| kJ | 58 | 75 | 63 | 45 | 45 | 54 | 24 | 38 | 14 | 21 | 19 | 27 | 15 | 48 | 44 | 8 | 9 | 27 | 19 |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 15 | WNW 11 | WNW 10 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 12 | SSW 15 | SSW 14 | SSW 13 | N 9 | N 8 | SSW 15 | SSW 14 | NNE 7 | SSW 13 |
| kJ | 58 | 34 | 44 | 18 | 18 | 35 | 32 | 30 | 24 | 14 | 21 | 18 | 17 | 6 | 5 | 42 | 39 | 9 | 34 |
Swell 3 Height (m) Direction Period (s) | WSW 9 | WSW 9 | SSW 14 | SSW 14 | WNW 12 | NW 11 | ENE 7 | SSW 16 | W 12 | ENE 7 | SSW 11 | W 10 | SSW 16 | W 10 | W 9 | N 8 | SW 11 | SSW 13 | W 10 |
| kJ | 8 | 8 | 21 | 20 | 13 | 5 | 10 | 25 | 11 | 5 | 12 | 8 | 25 | 8 | 7 | 11 | 4 | 18 | 7 |
Wind waves Height (m) Direction Period (s) | NE 6 | NE 6 | — | — | — | — | — | — | NE 6 | NNE 5 | — | NNE 5 | — | NE 5 | NE 5 | — | NNE 5 | — | NE 7 |
| kJ | 34 | 52 | — | — | — | — | — | — | 52 | 23 | — | 22 | — | 10 | 25 | — | 15 | — | 21 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 3 | 0 | 29 | 29 | 94 | 84 | 42 | 94 | 97 | 38 | 94 | 38 | 38 | 94 | 94 | 38 | 94 | 94 | 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.
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