Surf Forecasts:
Sixtynine surf forecast from 31 Aug 2026:
- Best quality surf: Sunday 6 Sep, 5AM (local time) - 2ft (0.6m), 10s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 5AM (local time) - 2ft (0.6m), 10s period, SW swell with 68 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 5AM (local time) - 2ft (0.6m), 10s period with SW 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 (Sep 06) at 5AM. The primary swell is predicted to be 0.6m and 10s 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 10s and forecast to arrive on Sunday (Sep 06) 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 1.2m 7s period and expected on Thursday (Sep 03) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sun 6th Sep) | 2ft (0.6m) 10s |
| Best Surf | 5AM (Sun 6th Sep) | 2ft (0.6m) 10s |
| Most Powerful | 5AM (Sun 6th Sep) | 2ft (0.6m) 10s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright, crew, let's get into it. Rusty here, looking at what's on the table for the next couple of weeks.
Honestly, it's a pretty flat stretch for a while. The water is sitting at 81°F, which is about average for this time of year, so no surprises there.
Monday morning the 31st kicks things off with a tiny 1.0ft swell out of the southwest, but the wind is a cross-shore from the north at 9 mph, and the whole thing is just a mess of cross-chop. The combined energy is a weak 33 and it's a no-go. That pretty much sets the tone for the next week. We see a few days with absolutely nothing, glassy conditions, but no swell to ride. Friday the 4th and Saturday the 5th are totally flat with a glassy surface, which is just cruel.
We finally get a little pulse around Sunday the 6th of September, with 2ft swell from the southwest, but the energy is still weak (68) and the wind is cross-shore, so it's poor. It stays like that through the next week – small, weak, and mostly messy, with a few clean afternoons but no real power behind the waves.
Now, there is a glimmer of hope towards the end of the run. On Monday the 14th of September, the swell builds to 2ft from the west, with a moderate energy of 113. The wind goes glassy by the afternoon, and the conditions are just "surfable waves but very ordinary." It's not a standout, but it's the first sign of life. The following morning, Tuesday the 15th, is also glassy with a 2ft west swell, energy at 97. By Tuesday afternoon, the energy jumps to 177, still from the west, with a period of 14 seconds – that's a nice long-period groundswell. The wind is glassy, so it's clean. This is the best we've got.
If you're looking for a wave, the standout is Sixtynine on Tuesday afternoon, September 15th. That 2ft west swell, with a 14-second period and glassy conditions, will be the cleanest and most surfable we've seen in this whole stretch. The long period means better shaped waves, more energy, and longer gaps between sets. It's small, but it'll be the pick of the batch.
The rest of the time? It's a waiting game. Keep your board waxed and your eyes on the horizon.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 25°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Fri afternoon, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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) | SW 15 | W 12 | W 12 | W 12 | N 7 | W 11 | W 11 | W 10 | W 10 | SW 13 | W 9 | W 9 | NE 7 | SSW 11 | SSW 11 | SW 10 | NE 7 | SW 10 | SW 10 | SW 10 | SW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 33 | 11 | 12 | 11 | 0 | 10 | 9 | 8 | 8 | 7 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 64 | 68 | 64 | 47 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | glassy | cross-off | on | glassy | glassy | cross | cross | cross-off |
High Tide | 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 | 11:57AM0.69m | 00:08AM0.19m | 12:59PM0.72m | 1:17AM0.24m | ||||||||
Low Tide | 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 | 7:52PM0.09m | 5:12AM0.03m | 8:26PM0.06m | ||||||||
 | |  |  | |  | | | | | | | | | | | | | | | | |
 | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 26 | 28 | 29 | 26 | 29 | 29 | 26 | 27 | 26 | 26 | 28 | 29 | 26 | 29 | 29 | 27 | 28 | 29 | 27 |
Feels °C | 29 | 30 | 27 | 29 | 30 | 29 | 32 | 30 | 26 | 27 | 26 | 27 | 30 | 32 | 29 | 32 | 33 | 31 | 29 | 30 | 31 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | NE 8 | NNE 8 | ENE 8 | NE 6 | NNE 8 | NE 7 | SSW 15 | SSW 15 | S 14 | NE 7 | S 13 | NE 7 | NE 6 | NNE 6 | NE 7 | SW 10 | NNE 7 | NNE 7 | NNE 7 | NE 12 |
| kJ | 101 | 133 | 101 | 26 | 31 | 106 | 121 | 45 | 42 | 16 | 139 | 32 | 99 | 83 | 41 | 69 | 84 | 38 | 46 | 61 | 319 |
Swell 2 Height (m) Direction Period (s) | SW 15 | SSW 14 | SSW 14 | SSW 18 | N 7 | SSW 16 | SSW 16 | W 10 | W 10 | SW 13 | S 14 | E 13 | S 11 | SSW 11 | SSW 11 | SW 10 | NE 8 | SW 10 | SW 10 | ENE 12 | SW 10 |
| kJ | 33 | 20 | 21 | 31 | 44 | 51 | 50 | 8 | 8 | 7 | 16 | 4 | 66 | 95 | 101 | 112 | 11 | 64 | 68 | 152 | 47 |
Swell 3 Height (m) Direction Period (s) | SSW 11 | W 12 | W 12 | W 12 | ENE 8 | W 11 | W 11 | SW 13 | SW 13 | W 9 | W 9 | W 9 | E 14 | E 13 | ENE 13 | NNE 11 | ENE 11 | E 13 | ENE 13 | SW 10 | SSW 18 |
| kJ | 11 | 11 | 12 | 11 | 27 | 10 | 9 | 7 | 7 | 2 | 2 | 2 | 14 | 14 | 32 | 23 | 22 | 87 | 125 | 64 | 64 |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 7 | — | — | — | NE 8 | NE 7 | NE 7 | — | NE 7 | — | — | — | — | NE 7 | — | — | — | — |
| kJ | — | — | — | 57 | — | — | — | 129 | 89 | 91 | — | 91 | — | — | — | — | 65 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 29 | 29 | 29 | 38 | 29 | 29 | 88 | 29 | 29 | 105 | 41 | 29 | 97 | 82 | 5 | 5 | 5 | 3 | 8 | 94 | 92 |
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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