Surf Forecasts:
Sixtynine surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 8PM (local time) - 7.5ft (2.3m), 14s period, WSW swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 5PM (local time) - 7ft (2.2m), 14s period, WSW swell with 2,082 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 5PM (local time) - 3.5ft (1.1m), 12s 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 5PM. The primary swell is predicted to be 1.1m and 12s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sixtynine in the next 16 days are 2.2m 14s and forecast to arrive on Monday (Sep 07) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 12s period and expected on Sunday (Sep 06) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Sun 6th Sep) | 3.5ft (1.1m) 12s |
| Best Surf | 8PM (Mon 7th Sep) | 7.5ft (2.3m) 14s |
| Most Powerful | 5PM (Mon 7th Sep) | 7ft (2.2m) 14s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright, Rusty here again, switching to the old-school numbers. Let’s break down the same forecast for Sixtynine.
The first few days? Total flat spell. Don’t even look at the water until Sunday the 6th of September. Nothing but poor, flat conditions from now until then.
But Sunday afternoon, the 6th, we get a glimmer. A 4ft southwest swell rolls in with a 12-second period, giving it some shape. The wind goes glassy, so it’ll be smooth as butter. The water’s at 82°F, pretty normal for this time of year.
The real highlight, the one you don’t want to miss, is Monday morning, the 7th of September. That’s the best of the whole run. We’ve got a solid 6ft groundswell from the southwest, with a long 14-second period. That’s a lot of energy (1307), and with glassy, offshore winds from the west, it’s going to be absolutely perfect. Intermediate surfers, this is your session. Clean, lined-up, and full of juice.
Monday afternoon gets bigger, hitting 7ft from the west-southwest, but the wind goes onshore and the tide gets tricky. That’s expert territory. By Tuesday the 8th, the swell drops to 5ft, but the onshore wind is still there, making it messy. After that, the second week goes quiet again. Tiny pulses of long-period swell (over 15 seconds) show up, but they’re barely 1ft and have no power. Not worth the paddle.
So, bottom line: the first week is a snooze until Sunday. The standout is Monday morning. Don’t sleep on it.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Thu afternoon, min 24°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Sun afternoon. Warm (max 30°C on Tue morning, min 26°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 9 | NE 6 | S 13 | SSW 12 | SSW 11 | SSW 12 | SSW 12 | SSW 12 | SW 12 | SW 12 | SW 13 | SW 14 | WSW 14 | WSW 12 | W 10 | W 10 | W 7 | SW 8 | NE 6 | SSW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 380 | 618 | 1307 | 2082 | 1158 | 461 | 231 | 37 | 20 | 0 | 0 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-off | cross-off | cross-on | glassy | cross-off | cross-on | glassy | glassy | glassy | on | glassy | on | on | glassy | cross | cross-off | cross-off |
High Tide | 7:55PM0.22m | 10:42AM0.65m | 10:08PM0.17m | 11:57AM0.69m | 00:08AM0.19m | 12:59PM0.72m | 1:17AM0.24m | 1:49PM0.75m | 2:08AM0.31m | 2:32PM0.75m | 2:51AM0.39m | 3:10PM0.73m | 3:32AM0.46m | |||||||
Low Tide | 5:16PM0.20m | 2:19AM0.02m | 7:06PM0.15m | 3:40AM0.04m | 7:52PM0.09m | 5:12AM0.03m | 8:26PM0.06m | 6:29AM0.01m | 8:55PM0.03m | 7:32AM-0.01m | 9:22PM0.01m | 8:26AM-0.02m | 9:48PM-0.01m | |||||||
 |  |  | |  | | | | |  |  | | | | | | | | | | |
 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | — | — | 3 | 2 | — | — | — | — | 2 | 1 | — | — | — |
Temp °C | 28 | 26 | 28 | 28 | 25 | 28 | 28 | 26 | 28 | 28 | 27 | 28 | 29 | 28 | 30 | 28 | 27 | 29 | 29 | 26 |
Feels °C | 29 | 27 | 30 | 30 | 25 | 30 | 31 | 30 | 31 | 32 | 32 | 32 | 32 | 32 | 33 | 32 | 32 | 31 | 31 | 27 |
Swell 1 Height (m) Direction Period (s) | NE 7 | NE 6 | NE 6 | NE 6 | NNE 5 | NNE 6 | SSW 12 | SSW 12 | SW 12 | SW 12 | SW 13 | SW 14 | WSW 14 | WSW 12 | W 10 | W 10 | W 7 | NE 8 | NE 6 | NE 7 |
| kJ | 99 | 54 | 52 | 52 | 25 | 36 | 180 | 247 | 346 | 380 | 618 | 1307 | 2082 | 1158 | 461 | 231 | 37 | 45 | 35 | 12 |
Swell 2 Height (m) Direction Period (s) | S 14 | SSW 13 | S 13 | SSW 12 | SSW 11 | SSW 12 | NNE 6 | NNE 6 | NNE 7 | NE 6 | NE 6 | ENE 12 | NE 12 | NE 12 | SW 9 | SW 8 | NNE 8 | SW 8 | NE 8 | SSW 13 |
| kJ | 16 | 58 | 84 | 115 | 71 | 119 | 47 | 31 | 38 | 56 | 40 | 187 | 232 | 190 | 114 | 66 | 45 | 20 | 14 | 33 |
Swell 3 Height (m) Direction Period (s) | W 9 | E 14 | E 14 | E 14 | ENE 14 | ENE 13 | ENE 14 | E 13 | ENE 12 | ENE 12 | ENE 12 | N 7 | SSW 17 | SSW 15 | NE 9 | NE 9 | SW 8 | SSW 14 | SW 8 | SSW 7 |
| kJ | 2 | 4 | 15 | 16 | 37 | 58 | 61 | 86 | 83 | 82 | 115 | 24 | 95 | 77 | 86 | 62 | 31 | 38 | 14 | 5 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 5 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 15 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 38 | 29 | 94 | 38 | 5 | 5 | 3 | 3 | 5 | 0 | 0 | 0 | 5 | 0 | 29 | 8 | 5 | 46 | 58 | 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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