
Surf Forecasts:
Sixtynine surf forecast from 3 Sep 2026:
- Best quality surf: Sunday 6 Sep, 11PM (local time) - 4.5ft (1.4m), 13s period, SW swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 5PM (local time) - 10ft (3.0m), 14s period, SW swell with 3,944 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 8PM (local time) - 4.5ft (1.3m), 13s 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 8PM. The primary swell is predicted to be 1.3m and 13s 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 3.0m 14s and forecast to arrive on Monday (Sep 07) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 13s period and expected on Sunday (Sep 06) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 6th Sep) | 4.5ft (1.3m) 13s |
| Best Surf | 11PM (Sun 6th Sep) | 4.5ft (1.4m) 13s |
| Most Powerful | 5PM (Mon 7th Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Sixtynine over the next 16 days.
The Lowdown
Alright, Rusty here, and I’ve got the word on the surf for the next couple of weeks. Let’s get straight into it.
First up, we’re looking at a bit of a flat spell. For the first few days, there’s nothing doing. The ocean’s got no energy for us, so you can leave the boards in the shed for now. We’ve got a stretch of calm, glassy conditions on Saturday the 5th, but there’s simply no swell to work with. It’s a tough start.
Now, the real action looks like it’s going to fire up on Monday the 7th of September. That’s when we get a proper pulse of swell from the SW pushing in at 6 ft, with a long period of 14 seconds. The combined energy is massive at (1459). It’s a groundswell, which means it’s got some serious push and shape, but at that size, it's going to be a bit much for the beginners. The wind is light and onshore in the morning, so it might be a little crinkly, but the afternoon cleans up to a cross-on breeze. The wave heights are going to push up to 10 ft in the afternoon, and the energy skyrockets to (3956). That’s a solid, thumping swell. This is the standout for the whole period. The water temp is sitting at 82°, which is pretty normal for this time of year, so no surprises there.
The spot to be is Sixtynine. It’s a fairly exposed joint that handles the WNW swell direction well, and this SW swell is in the right ballpark. It’s a consistent break and it’s not going to be too crowded, but you might see a few others out there. The wind is light and cross-off on the Friday before, but by Monday, the onshore breeze might make it a bit lumpy in the morning. The afternoon session, though, with that 10 ft of SW swell, that’s the one to aim for.
After that, the swell drops off quickly. Tuesday the 8th sees a smaller 5 ft W swell, but the wind is onshore and the conditions are poor. By Wednesday, it’s flat again and we’re back into a long stretch of no real surf. The energy just isn’t there for the rest of the week or the following week. There are a few tiny pulses of long-period SW swell, like 1.0 ft with a 16-second period on the 10th, but that’s just a whisper. The energy is weak (42), and it’s not worth paddling out for.
The second week is a write-off for surf. From the 9th of September right through to the 18th, we’re looking at tiny, unrideable waves. The wind is mostly light, and there are some glassy afternoons, but with no swell to speak of, it’s a flat patch. The 15th of September has a 1 ft SW swell with a 21-second period, but the energy is still low (170) and the wind is onshore. Not a chance.
So, to sum it up: save your energy for that Monday the 7th of September. The morning is okay, but the afternoon is the highlight. Everything else is a flat, quiet stretch. The wait will be worth it.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Thu morning, min 25°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Sun afternoon. Warm (max 30°C on Tue morning, min 26°C on Sun afternoon). Wind will be generally light. | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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 9 | W 9 | NE 6 | NE 6 | S 12 | SSW 11 | SSW 12 | SSW 12 | SSW 12 | SW 12 | SW 13 | SW 13 | SW 14 | SW 14 | WSW 12 | W 10 | WNW 9 | W 6 | NE 8 | NE 7 | SW 8 |
Wave Graph | |||||||||||||||||||||
2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 839 | 1459 | 3944 | 1517 | 449 | 143 | 21 | 0 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-on | glassy | glassy | on | glassy | glassy | on | cross-on | cross | cross-on | glassy | glassy | cross-on | cross-off | cross-off |
High Tide | 9:20AM0.63m | 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 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
— | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 8 | — | — | — | — | — | 1 | 1 | — | — | — |
Temp °C | 29 | 28 | 25 | 28 | 28 | 25 | 29 | 29 | 27 | 28 | 28 | 27 | 29 | 29 | 28 | 30 | 28 | 27 | 29 | 29 | 26 |
Feels °C | 29 | 29 | 25 | 29 | 29 | 26 | 31 | 31 | 30 | 31 | 32 | 31 | 32 | 31 | 32 | 33 | 32 | 32 | 33 | 32 | 28 |
Swell 1 Height (m) Direction Period (s) | NE 7 | S 14 | NE 6 | SSW 13 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | SSW 12 | SW 12 | SW 13 | SW 13 | SW 14 | NE 12 | WSW 12 | W 10 | WNW 9 | SSW 8 | NE 8 | SW 8 | NNE 5 |
71 | 16 | 52 | 33 | 63 | 29 | 54 | 45 | 243 | 379 | 480 | 839 | 1459 | 209 | 1517 | 449 | 143 | 46 | 45 | 16 | 14 | |
Swell 2 Height (m) Direction Period (s) | S 14 | W 9 | SSW 13 | S 11 | S 12 | SSW 11 | SSW 12 | SSW 12 | NNE 5 | NE 6 | NNE 6 | ENE 12 | NE 12 | N 8 | NE 11 | SW 9 | SW 9 | W 6 | SW 8 | SSW 13 | NE 7 |
16 | 2 | 58 | 21 | 76 | 71 | 107 | 125 | 25 | 61 | 47 | 255 | 252 | 12 | 134 | 159 | 79 | 21 | 32 | 34 | 19 | |
Swell 3 Height (m) Direction Period (s) | W 9 | E 12 | E 14 | ENE 8 | E 14 | ENE 14 | ENE 13 | ENE 13 | E 13 | E 12 | ENE 6 | N 10 | SSW 17 | — | SSW 15 | NE 9 | NE 9 | NE 8 | SSW 14 | ENE 13 | SW 8 |
2 | 3 | 4 | 6 | 16 | 37 | 59 | 35 | 86 | 80 | 23 | 30 | 92 | — | 78 | 68 | 38 | 33 | 36 | 17 | 16 | |
Wind waves Height (m) Direction Period (s) | — | NE 7 | — | NE 6 | — | — | — | — | — | — | — | — | — | SW 14 | — | — | — | — | — | NE 7 | — |
— | 85 | — | 33 | — | — | — | — | — | — | — | — | — | 3944 | — | — | — | — | — | 62 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 88 | 29 | 41 | 97 | 94 | 5 | 88 | 5 | 3 | 5 | 3 | 0 | 5 | 28 | 3 | 31 | 0 | 5 | 88 | 46 | 94 |
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.










