Surf Forecasts:
Sixtynine surf forecast from 20 Jul 2026:
- Most powerful swell: Monday 20 Jul, 8AM (local time) - 1ft (0.3m), 12s period, WNW swell with 28 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 12s and forecast to arrive on Monday (Jul 20) at 8AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Sunday (Jul 26) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Mon 20th Jul) | 1ft (0.3m) 12s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright, this is Rusty.
First up, let’s be straight with you – the next two weeks are looking pretty flat for Sixtynine. We’ve got a long dry spell coming, with no real surf on offer from Monday the 20th of July all the way through the first week. The water temp is sitting at 80°, which is about average for the time of year, so at least a dip won’t be a shock to the system. But the swell just isn’t showing up.
We do have a tiny pulse of energy on Thursday the 30th of July. That morning, we might see a 0.3ft swell out of the SW with a very long period of 19 seconds, but it’s coming in with a light cross-onshore wind, so it’s not going to be pretty. The combined energy is weak (14). That afternoon, the wind goes glassy, and the swell bumps up to 1.0ft from the SW, period 18 seconds, with moderate energy (49). That’s the best we’ll see, but it’s still poor surf conditions. It’s tiny, and that long period groundswell will be tricky for a beach break – it’ll likely break too straight and be hard to catch.
Things get a little more interesting in the first week of August. On Sunday the 2nd of August, we get a 1.0ft SW swell with a 13-second period and light onshore wind, but the energy is still only moderate (48). Then Monday the 3rd of August has a 0.7ft WNW swell (15-second period, 21 energy), but again, it’s cross-on. Tuesday the 4th of August brings a glassy afternoon with 0.7ft WNW swell and 13-second period, but the energy is low (17).
Honestly, there’s no standout session here. The whole period is a write-off for proper surfing. The waves are too small, the energy is weak, and the wind is never truly offshore. For a beach break setup like this, with such tiny, long-period swells, it’s not even worth paddling out. The setup looks more interesting for kite surfing than paddle surfing, if anything.
Hang in there. Forecasts can change, but for now, give the board a rest.
- Rusty
Short Range ForecastSome drizzle, heaviest during Tue afternoon. Warm (max 28°C on Mon morning, min 24°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Thu morning, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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) | WNW 12 | WNW 12 | WNW 12 | W 11 | NE 7 | SSW 26 | SSW 24 | SSW 23 | SSW 22 | SSW 20 | SSW 20 | SSW 18 | NE 7 | NNE 7 | NE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 27 | 26 | 13 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 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-on | glassy | glassy | cross-on | glassy | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross | cross | cross | cross-off |
High Tide | 9:42AM0.48m | 8:14PM0.41m | 10:49AM0.54m | 8:47PM0.32m | 11:51AM0.59m | 9:44PM0.25m | 12:45PM0.63m | 11:28PM0.20m | 1:32PM0.66m | 00:54AM0.19m | 2:14PM0.70m | 1:52AM0.20m | 2:52PM0.72m | 2:37AM0.22m | |||||||
Low Tide | 3:21PM0.28m | 3:12AM0.03m | 5:30PM0.29m | 3:48AM0.04m | 7:48PM0.24m | 4:32AM0.04m | 8:54PM0.19m | 5:23AM0.04m | 9:26PM0.14m | 6:18AM0.02m | 9:52PM0.11m | 7:09AM0.01m | 10:16PM0.09m | ||||||||
 |  |  | |  |  | | | | | | | | | | | | | | | | |
 | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — |
 | — | 7:04 | — | — | 7:04 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — |
mm | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 26 | 28 | 27 | 26 | 27 | 28 | 25 | 28 | 28 | 25 | 28 | 28 | 25 | 27 | 28 | 25 | 26 | 27 | 25 |
Feels °C | 29 | 30 | 29 | 30 | 30 | 29 | 29 | 29 | 27 | 27 | 30 | 26 | 27 | 28 | 25 | 27 | 28 | 26 | 27 | 28 | 25 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NNE 5 | NNE 7 | NE 7 | NE 7 | NE 7 | SSW 24 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 7 | NNE 7 | NE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 |
| kJ | 31 | 14 | 33 | 37 | 54 | 38 | 55 | 36 | 31 | 40 | 62 | 34 | 67 | 96 | 84 | 106 | 126 | 161 | 133 | 133 | 95 |
Swell 2 Height (m) Direction Period (s) | WNW 12 | NNE 7 | WNW 12 | SSW 11 | SSW 12 | SSW 12 | SSW 16 | SSW 23 | SSW 22 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | SSW 20 | SSW 16 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | ENE 15 |
| kJ | 27 | 36 | 13 | 12 | 14 | 13 | 25 | 106 | 91 | 78 | 75 | 66 | 61 | 59 | 76 | 50 | 102 | 102 | 86 | 84 | 77 |
Swell 3 Height (m) Direction Period (s) | ENE 7 | WNW 12 | SSW 13 | W 11 | SSW 16 | SSW 26 | SSW 11 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | ENE 7 | SSW 13 | SSW 21 | SSW 16 | SSW 19 | E 17 | E 17 | E 16 | E 16 | SSW 16 |
| kJ | 5 | 26 | 17 | 9 | 26 | 65 | 11 | 30 | 58 | 25 | 25 | 5 | 17 | 45 | 25 | 73 | 23 | 49 | 45 | 43 | 48 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 92 | 57 | 42 | 84 | 94 | 5 | 5 | 46 | 42 | 94 | 88 | 42 | 88 | 94 | 42 | 29 | 94 | 29 | 94 | 38 | 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.
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