Surf Forecasts:
Sixtynine surf forecast from 30 Aug 2026:
- Most powerful swell: Sunday 30 Aug, 2AM (local time) - 1ft (0.3m), 17s period, SW swell with 44 kJ wave energy.
Best Forecast Surf Conditions for Sixtynine this week:
The most powerful waves expected at Sixtynine in the next 16 days are 0.3m 17s and forecast to arrive on Sunday (Aug 30) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 7s period and expected on Saturday (Sep 05) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 30th Aug) | 1ft (0.3m) 17s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright, this is Rusty. Let’s be straight with you. I’ve had a good look at what’s coming for Sixtynine over the next couple of weeks, and honestly, it’s a pretty grim stretch. We’re staring down the barrel of a long, long dry spell with hardly anything worth paddling out for.
The first bit of real energy doesn’t even show up until the morning of Thursday, September 10th, and even then, it’s just a whisper. We’re talking about a weak, onshore wind from the WNW, with a swell height of just 1.0 ft from the SW. The period is a long 17 seconds, which suggests some groundswell energy, but it’s so small it’s barely a ripple. The combined energy is only 80 – that’s weak, nothing to get excited about. The wind is onshore, so it’ll be bumpy and messy. It’s not a surfable day.
The afternoon of Thursday, September 10th sees a tiny bump. The swell picks up to 1 ft from the W, with a 14-second period. The combined energy climbs to 109, which is still just barely moderate. The wind shifts to a light onshore from the WNW. It’s still poor, honestly. Not worth driving for.
The Friday, September 11th is more of the same: 1 ft from the W, 12-second period, with onshore and cross-onshore winds. The energy is around 46-49, which is weak. This is a no-go.
The Saturday, September 12th offers a little more shape, with 1.0 ft from the SW and a 14-second period, but the wind is onshore in the morning and cross-shore in the afternoon. The energy sits around 50-54. It’s still poor.
The Sunday, September 13th and Monday, September 14th are the best of a bad bunch, but that’s saying nothing. We get 1.0 ft to 1 ft from the W and WNW, with periods of 11-12 seconds. The wind is light and cross-shore or cross-onshore. The energy on the 14th hits 81, which is still weak. It’s small, inconsistent, and just not clean.
There is no standout. There is no day to circle on the calendar. This is a full 16-day window with nothing but poor surf conditions. The only reason to look at the water is if you’re a kite surfer, because the setup is more interesting for that than for paddle surfing. For the rest of us, it’s a dry spell. Don’t hold your breath.
- Rusty
Short Range ForecastMostly dry. Warm (max 29°C on Sun afternoon, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Wed morning, min 25°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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 17 | NNE 7 | NNE 7 | SW 15 | SW 15 | NNE 8 | W 12 | NNE 7 | NNE 6 | W 11 | NE 8 | W 10 | NNE 8 | W 9 | W 9 | W 9 | NE 6 | SW 13 | NE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 44 | 0 | 0 | 36 | 33 | 0 | 12 | 0 | 0 | 10 | 0 | 8 | 0 | 2 | 2 | 2 | 0 | 7 | 0 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | glassy | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | glassy | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 5:31AM0.53m | 5:21PM0.56m | 6:15AM0.57m | 5:51PM0.48m | 7:06AM0.60m | 6:23PM0.39m | 8:06AM0.61m | 6:59PM0.30m | 9:20AM0.63m | 7:55PM0.22m | 10:42AM0.65m | 10:08PM0.17m | |||||||
Low Tide | 11:20PM-0.01m | 11:21AM0.09m | 11:45PM-0.02m | 12:16PM0.14m | 00:12AM-0.02m | 1:23PM0.19m | 00:44AM-0.01m | 2:57PM0.22m | 1:24AM0.00m | 5:16PM0.20m | 2:19AM0.02m | 7:06PM0.15m | 3:40AM0.04m | ||||||
 |  |  | | | | | | | | | | | | |  | | | | |
 | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:40 | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 28 | 29 | 26 | 28 | 28 | 26 | 28 | 29 | 27 | 29 | 28 | 26 | 28 | 28 | 26 | 27 | 27 | 27 |
Feels °C | 27 | 28 | 31 | 28 | 29 | 31 | 27 | 29 | 29 | 30 | 31 | 30 | 28 | 28 | 27 | 26 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 8 | NNE 8 | SSW 14 | NNE 7 | NNE 6 | NNE 8 | NE 8 | NE 7 | NNE 8 | SSW 14 | NE 8 | SSW 13 | ENE 8 | S 13 | N 6 |
| kJ | 70 | 62 | 81 | 56 | 98 | 98 | 20 | 74 | 53 | 106 | 50 | 107 | 50 | 40 | 15 | 17 | 12 | 13 | 31 |
Swell 2 Height (m) Direction Period (s) | SW 17 | SSW 16 | SSW 15 | SW 15 | SW 15 | NE 8 | W 12 | ENE 8 | ENE 8 | SSW 16 | N 7 | SSW 15 | NE 5 | W 9 | SSW 14 | W 9 | S 13 | E 14 | E 14 |
| kJ | 44 | 25 | 22 | 36 | 33 | 29 | 12 | 25 | 26 | 51 | 24 | 45 | 9 | 2 | 19 | 2 | 14 | 4 | 14 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | S 12 | S 12 | W 11 | W 11 | SSW 14 | S 20 | SSW 18 | NE 8 | W 11 | SSW 16 | W 10 | SSW 15 | E 12 | W 9 | E 14 | E 13 | SW 13 | S 13 |
| kJ | 14 | 11 | 11 | 9 | 2 | 20 | 7 | 31 | 14 | 10 | 50 | 8 | 42 | 3 | 2 | 4 | 14 | 7 | 3 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NE 8 | — | — | — | — | — | — | NNE 7 | NNE 6 | NNE 6 | NE 6 | NE 6 | NE 7 |
| kJ | — | — | — | — | — | — | 113 | — | — | — | — | — | — | 93 | 42 | 67 | 52 | 78 | 55 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 29 | 88 | 94 | 29 | 29 | 97 | 29 | 88 | 29 | 29 | 88 | 57 | 57 | 94 | 38 | 115 | 38 | 38 | 29 |
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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