
Surf Forecasts:
Sixtynine surf forecast from 4 Aug 2026:
- Most powerful swell: Tuesday 4 Aug, 8PM (local time) - 1ft (0.3m), 13s period, W swell with 30 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 13s and forecast to arrive on Tuesday (Aug 04) at 8PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Sunday (Aug 09) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Tue 4th Aug) | 1ft (0.3m) 13s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s call it like it is – for the next week and a half, we’re looking at a pretty quiet stretch. The first real chance of anything worthwhile won’t show up until the weekend of the 15th, so if you’re itching for a paddle, you’ll have to be patient.
We’ve got a long gap of almost no surf at all from now through the 14th. Tiny, weak waves – mostly around 0.6 ft to 1 ft – with poor conditions and a lot of onshore or cross-onshore wind. Not worth getting wet for.
The first flicker of life comes on Saturday the 15th, early morning, at Sixtynine. A west-northwest groundswell is pushing in at 2 ft with a period of 16 seconds. That’s a long period, so the energy is there, and the combined swell energy is a moderate 303 (moderate). The water temp is sitting at 81°, which is about normal for this time of year. The early morning looks clean, with light cross-shore winds from the north at 6 mph. This is a glassy, promising start to the day. It’s an intermediate break, so suited to most of you who can handle a bit of a paddle. The afternoon sees the wind swing more side-offshore from the northeast at 12 mph, keeping it clean, but the swell energy drops a touch to 256 (moderate). The swell is from the optimum direction for this spot (WNW), so it should have some shape. Given the size (2 ft), it’s not a monster, but the long period means longer waits between sets.
Sunday the 16th is your next best bet. Similar size – 2 ft from the west, with a 15-second period. The afternoon session is the standout: glassy conditions, with light north-northeast winds at 3 mph. The combined swell energy is 206 (moderate). It’s surfable, but the comment says “very ordinary conditions,” so don’t expect perfection. Still, a glassy afternoon with a bit of west swell is a solid winner for the weekend. Crowds are only “sometimes” a problem here, so you might find a bit of space.
After that, it fades again. The 17th and 18th drop back to 2 ft to 2 ft, with poor wind and lower energy (105 to 146). The 18th afternoon has another glassy moment with 2 ft from the west, but it’s very ordinary.
The very tail end of the window, on Wednesday the 19th, sees a jump in swell energy again – 2 ft from the west-northwest, with a 17-second period and combined energy of 274 (moderate). But the wind is onshore, so it’s only marginal. The afternoon picks up a risk of thunderstorms. Not ideal.
The standout: If you’re picking one session, it’s Saturday 15th morning at Sixtynine. That 2 ft WNW groundswell with 16-second period, light cross-shore wind, and clean conditions gives you the best opportunity for a few long, lined-up waves. The long period means it’ll be a bit straight at the beach, but it’s a decent spot for the size. Sunday afternoon is a close second for the glassy finish.
The pick for overall quality: The Sunday 16th afternoon glass-off at Sixtynine. It’s the most user-friendly window, with a gentle 2 ft west swell, 15-second period, and zero wind. Perfect for a relaxing session.
That’s the picture. Not a lot of juice, but those two windows are worth a look. Hang in there.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 25°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 29°C on Fri afternoon, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 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) | W 11 | W 11 | W 13 | W 13 | W 12 | W 12 | W 12 | W 12 | SSW 14 | W 12 | W 12 | SSW 19 | SSW 18 | NE 6 | NE 6 | W 13 | W 12 | W 11 | W 11 | W 11 | W 10 |
Wave Graph | |||||||||||||||||||||
9 | 10 | 12 | 28 | 11 | 11 | 11 | 12 | 0 | 11 | 11 | 0 | 0 | 0 | 0 | 29 | 25 | 23 | 21 | 21 | 19 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | glassy | cross-on | on | glassy | cross-on | on | cross-off | cross-on | glassy | cross-off | cross-on | cross | cross-off | cross-on | glassy | glassy | on | cross-on | cross-off |
High Tide | 8:43AM0.52m | 7:30PM0.41m | 9:54AM0.57m | 8:12PM0.32m | 11:08AM0.63m | 9:29PM0.23m | 12:16PM0.69m | 11:28PM0.19m | 1:16PM0.76m | 1:00AM0.19m | 2:08PM0.80m | 2:05AM0.23m | 2:55PM0.83m | 2:57AM0.27m | |||||||
Low Tide | 2:34PM0.25m | 2:20AM-0.00m | 4:37PM0.27m | 3:05AM-0.01m | 6:57PM0.22m | 4:04AM-0.01m | 8:13PM0.15m | 5:14AM-0.02m | 8:57PM0.09m | 6:24AM-0.04m | 9:32PM0.05m | 7:27AM-0.07m | 10:05PM0.02m | ||||||||
5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
— | 6:58 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:55 | — | — | 6:54 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — | 2 | — |
Temp °C | 28 | 29 | 27 | 28 | 29 | 26 | 28 | 28 | 26 | 28 | 29 | 26 | 28 | 28 | 26 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 30 | 31 | 31 | 30 | 31 | 29 | 31 | 31 | 30 | 29 | 32 | 30 | 30 | 30 | 28 | 32 | 32 | 31 | 31 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | NNE 6 | ENE 11 | NNE 5 | NE 9 | NE 9 | NNE 4 | NE 5 | NE 5 | NE 4 | NNE 4 | NE 5 | NE 11 | NE 5 | NE 10 | NE 6 | NE 7 | NE 6 | NNE 7 | NE 7 | NE 7 | NE 7 |
13 | 46 | 9 | 22 | 20 | 7 | 23 | 22 | 10 | 10 | 22 | 18 | 22 | 14 | 51 | 75 | 59 | 59 | 67 | 73 | 46 | |
Swell 2 Height (m) Direction Period (s) | ENE 11 | W 11 | ENE 10 | NNE 4 | W 12 | NE 8 | NE 8 | NE 8 | SSW 14 | W 12 | W 12 | SSW 13 | NE 10 | SSW 18 | NE 9 | W 13 | W 12 | W 11 | W 11 | SSW 15 | W 10 |
47 | 10 | 39 | 6 | 11 | 18 | 10 | 9 | 20 | 11 | 11 | 17 | 15 | 31 | 13 | 29 | 25 | 23 | 21 | 47 | 19 | |
Swell 3 Height (m) Direction Period (s) | W 11 | SW 12 | W 13 | W 13 | NNE 9 | W 12 | W 12 | W 12 | ENE 7 | SSW 14 | SSW 13 | SSW 19 | SSW 18 | SSW 13 | SSW 18 | SSW 16 | NE 9 | SSW 12 | SSW 12 | W 11 | SSW 16 |
9 | 5 | 12 | 28 | 8 | 11 | 11 | 12 | 5 | 18 | 18 | 37 | 32 | 17 | 30 | 26 | 12 | 14 | 15 | 21 | 24 | |
Wind waves Height (m) Direction Period (s) | — | NNE 6 | — | — | NNE 5 | — | — | — | — | — | — | NNE 5 | — | NE 6 | — | — | — | — | — | — | — |
— | 27 | — | — | 14 | — | — | — | — | — | — | 17 | — | 42 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 88 | 41 | 38 | 88 | 88 | 57 | 88 | 88 | 38 | 88 | 88 | 41 | 88 | 97 | 38 | 84 | 38 | 38 | 88 | 88 | 38 |
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.











