Surf Forecasts:
O'Neills Bay surf forecast from 7 Aug 2026:
- Best quality surf: Sunday 9 Aug, 6AM (local time) - 8ft (2.4m), 11s period, WNW swell with cross-offshore winds.
- Most powerful swell: Saturday 15 Aug, 12AM (local time) - 8ft (2.5m), 13s period, WNW swell with 1,966 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 6AM (local time) - 1.5ft (0.4m), 13s period with SW swell.
Best Forecast Surf Conditions for O'Neills Bay this week:
The surf forecast for O'Neills Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 08) at 6AM. The primary swell is predicted to be 0.4m and 13s period with a secondary swell of 0.4m and 9s. Another secondary swell of 0.2m and 3s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at O'Neills Bay in the next 16 days are 2.5m 13s and forecast to arrive on Saturday (Aug 15) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Tuesday (Aug 11) at 9PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sat 8th Aug) | 1.5ft (0.4m) 13s |
| Best Surf | 6AM (Sun 9th Aug) | 8ft (2.4m) 11s |
| Most Powerful | 12AM (Sat 15th Aug) | 8ft (2.5m) 13s |
Table - best surf conditions forecast for O'Neills Bay over the next 16 days.
The Lowdown
Right then, let’s have a look at the forecast for O’Neills Bay. It’s a bit of a slow burner this one, but there’s some serious size on the way for the crew willing to wait.
The water’s sitting at 57°, which is just about where you’d expect it for this time of year, nothing wild there.
The first few days are pretty quiet. Thursday afternoon the 7th is a write-off with a tiny 1ft SW swell and a cross-on breeze – you’d be wasting your time. Friday the 8th stays small, but the wind swings cross-off in the morning, tidying up that 1ft slop. It’s surfable, but nothing to get excited about.
Then things properly kick off on Sunday morning the 9th. A solid pulse of 6ft swell from the WNW rolls in with a short 10-second period, but the energy is pumping at a very strong 1388. The wind is light and cross-off, keeping it clean. This is excellent surf, but it’s not for the faint-hearted – that size is pushing into the realm for experienced surfers only.
The swell drops back a touch for the start of the following week, but the consistency is there. Tuesday the 11th and Wednesday the 12th see clean 3ft and 3ft sets from the WSW, with light offshore winds. Wednesday afternoon goes glassy, which is a beautiful window for a long session on a smaller board.
The standout, though, has to be the weekend of the 16th and 17th. Sunday the 16th brings a 7ft WSW swell with a long 18-second period, and the wind is light and cross-off – clean, powerful, and pushing a very strong 3128 energy. This is proper groundswell. Monday the 17th is the pinnacle: a 8ft WSW swell, 17-second period, light offshore breeze, and a massive 4307 energy. This is heavy, expert-level surf. The wave direction lines up perfectly with the optimum SW direction for this break. The surf quality is top-tier, but with that kind of power, it’s for the strong paddler only. And with crowds listed as ‘often’, expect company out there.
After that, the wind turns ugly. Tuesday the 18th and Wednesday the 19th are blown out with fresh cross-onshore winds and messy 8ft to 10ft slop. Not worth the paddle.
The best of the bunch is undoubtedly Monday the 17th of August. That 8ft, 17-second groundswell with light offshore wind is a proper session. Just know your limits.
Rusty
Short Range ForecastLight rain (total 6mm), mostly falling on Sat night. Very mild (max 14°C on Sun morning, min 9°C on Fri afternoon). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 14mm), heaviest on Wed morning. Very mild (max 18°C on Thu morning, min 11°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | ||||||||||||||
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 14 | SW 14 | WSW 13 | SW 19 | WSW 18 | WNW 10 | WSW 15 | WSW 18 | WSW 16 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 19 | WSW 18 | WSW 16 | WSW 16 | WSW 14 | WSW 14 | WSW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 48 | 46 | 68 | 90 | 211 | 674 | 627 | 273 | 334 | 612 | 515 | 396 | 273 | 322 | 270 | 306 | 314 | 236 | 229 | 314 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-off | cross-off | cross-off | on | on | on | on | glassy | off | off | off | off | glassy | off | cross-off | cross-off | cross-off |
High Tide | 4:21AM2.30m | 5:11PM2.36m | 5:43AM2.31m | 6:28PM2.47m | 6:58AM2.42m | 7:34PM2.65m | 8:00AM2.58m | 8:30PM2.84m | 8:53AM2.73m | 9:19PM3.00m | 9:41AM2.84m | 10:03PM3.09m | ||||||||
Low Tide | 10:14PM0.69m | 10:49AM0.58m | 11:31PM0.66m | 12:03PM0.53m | 00:45AM0.54m | 1:11PM0.40m | 1:50AM0.37m | 2:10PM0.23m | 2:45AM0.18m | 3:02PM0.08m | 3:35AM0.04m | 3:49PM-0.02m | ||||||||
 |  | |  |  |  | |  |  | | | | |  |  | | | |  |  | |
 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — |
 | 5:40 | — | — | 5:42 | — | — | 5:43 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — |
mm | — | — | — | — | 3 | 2 | 1 | — | — | — | — | — | — | 6 | 8 | — | — | — | 2 | 4 |
Temp °C | 10 | 10 | 12 | 13 | 13 | 14 | 14 | 13 | 14 | 14 | 13 | 13 | 14 | 13 | 15 | 17 | 14 | 18 | 18 | 15 |
Feels °C | 8 | 8 | 9 | 9 | 9 | 12 | 13 | 12 | 11 | 11 | 12 | 10 | 10 | 8 | 15 | 18 | 14 | 17 | 16 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 14 | WNW 8 | WNW 8 | WSW 18 | WNW 10 | WSW 15 | WSW 8 | WSW 16 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 19 | WSW 18 | WSW 16 | WSW 16 | WNW 9 | WNW 9 | WSW 16 |
| kJ | 42 | 46 | 38 | 60 | 204 | 674 | 627 | 103 | 334 | 612 | 515 | 396 | 273 | 322 | 270 | 306 | 314 | 90 | 149 | 314 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 10 | WSW 13 | SW 13 | SW 12 | WSW 19 | NW 9 | WSW 14 | WSW 13 | SW 9 | SW 7 | SW 7 | SW 7 | WSW 13 | SW 12 | W 12 | W 10 | WSW 14 | WSW 14 | WSW 20 |
| kJ | 48 | 15 | 68 | 41 | 37 | 566 | 206 | 243 | 277 | 49 | 51 | 28 | 25 | 147 | 37 | 26 | 102 | 236 | 229 | 256 |
Swell 3 Height (m) Direction Period (s) | SW 18 | W 10 | WSW 19 | SW 19 | — | WSW 19 | — | WSW 18 | WSW 6 | WSW 8 | NW 7 | WSW 22 | WSW 21 | SW 7 | SW 7 | W 12 | — | W 11 | SW 18 | WSW 20 |
| kJ | 13 | 8 | 35 | 90 | — | 148 | — | 273 | 26 | 13 | 2 | 48 | 173 | 7 | 2 | 46 | — | 37 | 81 | 256 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NW 8 | — | — | — | — | — | — | — | NNE 3 | NNE 4 | N 6 | NW 6 | NW 4 | NNE 2 | — | NW 8 |
| kJ | — | — | — | — | 211 | — | — | — | — | — | — | — | 1 | 8 | 23 | 16 | 7 | 1 | — | 201 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 115 | 49 | 0 | 7 | 115 | 0 | 39 | 39 | 39 | 39 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 49 |
Best forecast wave conditions in Auckland | ||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||
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Information about the O'Neills Bay Surf forecast
The above surf forecast table for O'Neills Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at O'Neills Bay can be found by selecting the local surf guide option on the grey menu. Our O'Neills Bay 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 (O'Neills Bay) 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 O'Neills Bay 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.
O'Neills Bay is 10 km (6 miles) from the city of Waitakere. If you plan a holiday in Auckland, look for hotels and other accommodation in Waitakere. Waitakere has rooms for a wide range of budgets as well as car hire and transport links.
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