
Surf Forecasts:
Sixtynine surf forecast from 18 Jul 2026:
- Best quality surf: Saturday 18 Jul, 5AM (local time) - 2ft (0.6m), 14s period, W swell with cross-offshore winds.
- Most powerful swell: Saturday 18 Jul, 5AM (local time) - 2ft (0.6m), 14s period, W swell with 134 kJ wave energy.
- Next surfable swell (1★+): Saturday 18 Jul, 5AM (local time) - 2ft (0.6m), 14s period with W 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 Saturday (Jul 18) at 5AM. The primary swell is predicted to be 0.6m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Sixtynine in the next 16 days are 0.6m 14s and forecast to arrive on Saturday (Jul 18) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Thursday (Jul 23) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 18th Jul) | 2ft (0.6m) 14s |
| Best Surf | 5AM (Sat 18th Jul) | 2ft (0.6m) 14s |
| Most Powerful | 5AM (Sat 18th Jul) | 2ft (0.6m) 14s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
Right off the bat, I gotta tell you, it’s looking pretty grim out there. We’ve got a long stretch of flatness ahead. From now through the end of July, there’s barely a ripple to get excited about. The first few days are a write-off with tiny, weak windswell and crossed-up wind. The water temp is about average for the time of year, nothing to write home about.
We’re looking at a full run of “poor surf conditions” with next to no energy. The combined energy from Saturday the 18th to Monday the 21st is just a sad little 89 to 9, which is about as weak as it gets. A few glassy afternoons pop up, but there’s nothing to ride.
Then from Tuesday the 22nd right through to Thursday the 30th of July, it’s dead flat. Zero swell. Not a single wave to speak of. That’s over a week of nothing. The wind is light and variable, sometimes glassy, but it’s all for nothing when there’s no swell.
We start to see a tiny pulse on Friday the 31st of July. A little 0.7ft swell from the north, but it’s short period and still pretty weak. The combined energy is only 6. That’s still a no-go. Later that afternoon, a 1ft south-west groundswell shows up with a 16-second period, and the energy bumps up to 40. Still tiny, but it’s a sign of life.
The first real chance of a wave doesn’t come until Saturday the 1st of August. We’ve got a 1ft to 1ft swell from the west-northwest. The period is very long, 17 to 18 seconds, which is classic groundswell. The energy is moderate at 76 to 96. This is a long-period groundswell, so it’ll be better suited for a point or reef than a beach break, as it might break too straight otherwise. The wind is onshore through the morning, which is a bummer, but it’s light.
Heading into Sunday the 2nd of August, the swell bumps up a bit. A 2ft west swell with a 15-second period and a combined energy of 147. That’s moderate energy. The wind is a light cross-onshore from the north, so it’s not perfect, but it’s the best we’ve seen in weeks.
If I’m picking a standout, it’s the Sunday the 2nd of August. That’s your best bet. The swell is slightly bigger, the period is still long, and the energy is the highest of the whole forecast. The light cross-onshore wind will keep it from being completely clean, but it’s rideable. It’s a week and a half away, so keep an eye on the forecast, but that’s the one to pencil in.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun night. Warm (max 28°C on Sat morning, min 25°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Tue morning, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||
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 14 | W 13 | W 13 | WNW 13 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | W 11 | NE 7 | SSW 26 | NE 7 | SSW 23 | SSW 22 | SSW 20 | NE 7 | SSW 18 |
Wave Graph | |||||||||||||||||||
138 | 89 | 87 | 57 | 50 | 29 | 29 | 27 | 13 | 13 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross-off | cross | on | cross-off | on | glassy | glassy | cross-on | glassy | cross-off | cross-on | glassy | cross-off | cross | cross-off | cross-off |
High Tide | 7:32AM0.39m | 7:10PM0.61m | 8:35AM0.44m | 7:42PM0.51m | 9:42AM0.48m | 8:14PM0.41m | 10:49AM0.54m | 8:47PM0.32m | 11:51AM0.59m | 9:44PM0.25m | 12:45PM0.63m | 11:28PM0.20m | |||||||
Low Tide | 1:35AM0.00m | 12:43PM0.14m | 2:07AM0.01m | 1:51PM0.22m | 2:39AM0.02m | 3:21PM0.28m | 3:12AM0.03m | 5:30PM0.29m | 3:48AM0.04m | 7:48PM0.24m | 4:32AM0.04m | 8:54PM0.19m | |||||||
— | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | |
7:05 | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:04 | — | — | 7:04 | — | |
mm | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 28 | 28 | 26 | 28 | 28 | 25 | 28 | 27 | 26 | 28 | 28 | 26 | 28 | 28 | 25 | 27 | 28 | 25 |
Feels °C | 31 | 29 | 29 | 30 | 29 | 31 | 29 | 30 | 29 | 29 | 30 | 31 | 29 | 30 | 30 | 27 | 27 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | NE 7 | NE 7 | NNE 7 | NNE 7 | NE 7 | NNE 6 | NNE 8 | NNE 7 | NE 7 | NNE 7 | NNE 7 | NNE 4 | NE 7 | NE 7 | NE 6 | NE 5 | NE 6 | NE 7 | NNE 5 |
47 | 64 | 76 | 50 | 53 | 41 | 51 | 48 | 71 | 42 | 31 | 8 | 37 | 52 | 32 | 12 | 40 | 97 | 15 | |
Swell 2 Height (m) Direction Period (s) | W 14 | W 13 | W 13 | WNW 13 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | SSW 12 | NE 7 | SSW 12 | SSW 16 | SSW 23 | SSW 22 | SSW 20 | SSW 20 | SSW 18 |
138 | 89 | 87 | 57 | 50 | 29 | 29 | 27 | 13 | 13 | 13 | 17 | 13 | 49 | 106 | 91 | 78 | 75 | 66 | |
Swell 3 Height (m) Direction Period (s) | SSW 15 | NNE 8 | ENE 8 | ENE 8 | SW 11 | SW 11 | SSW 12 | SSW 11 | SSW 10 | SSW 16 | W 11 | SSW 12 | SSW 26 | SSW 24 | NNE 7 | SSW 17 | SSW 16 | SSW 16 | SSW 17 |
21 | 21 | 11 | 6 | 5 | 4 | 13 | 11 | 11 | 26 | 9 | 14 | 65 | 55 | 5 | 29 | 25 | 25 | 30 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 5 | 3 | 29 | 94 | 94 | 41 | 92 | 57 | 38 | 92 | 94 | 5 | 94 | 97 | 38 | 38 | 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.










