Surf Forecasts:
O'Neills Bay surf forecast from 4 Aug 2026:
- Best quality surf: Thursday 6 Aug, 9AM (local time) - 4ft (1.2m), 12s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 6AM (local time) - 8ft (2.4m), 14s period, SW swell with 2,356 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 9AM (local time) - 4ft (1.2m), 12s 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 Thursday (Aug 06) at 9AM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 0.1m and 22s. Another secondary swell of 0.6m and 5s 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 2.4m 14s and forecast to arrive on Wednesday (Aug 05) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Aug 08) at 9PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Thu 6th Aug) | 4ft (1.2m) 12s |
| Best Surf | 9AM (Thu 6th Aug) | 4ft (1.2m) 12s |
| Most Powerful | 6AM (Wed 5th Aug) | 8ft (2.4m) 14s |
Table - best surf conditions forecast for O'Neills Bay over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's cookin' at O'Neills Bay.
Right off the bat, the water sits at 57.4°, which is pretty much spot on for this time of year, so nothing weird going on there.
Honestly, we're looking at a bit of a slow start. The first few days are a write-off. Tuesday afternoon has 8.2ft of messy, cross-on slop with a 18.6 mph wind, and the combined energy is a massive 2010, but it's ugly. Wednesday and Thursday are also rough, with onshore winds and lumpy conditions. The swell is there, but it's not surfable.
We finally get a clean window on Thursday morning, the 6th. The swell drops to a clean 3.9ft from the SW, with a period of 12 seconds and a light offshore wind. The energy is a modest 465, but it'll be clean. It's small, but it's something.
The real action starts to build from the second week. The standout of the whole period, and I mean the one to circle on your calendar, is Monday the 17th. We've got a solid 5.6ft of SW groundswell in the morning, dropping to 4.9ft in the afternoon, with a period of 15-16 seconds. The wind is light offshore from the east and east-northeast, making for clean, lined-up waves. The energy is strong at 1717. This is excellent for experienced surfers; the size is in that sweet spot, and the wind is magic. It's a long-period swell, so at a beach break like O'Neills it might jack up a bit fast, but for the crew that know the sand banks, it'll be a ripper.
The Thursday morning before that, the 13th, is also worth a mention. The wind is dead calm, glassy as a mirror, with 4.3ft of 14-second SW swell. The wave energy is 1108. It'll be clean and fun, but it's not as punchy as that Monday.
The rest of the period is a mixed bag. There's a bit of swell but the wind is often cross-on or onshore, turning it into a chop-fest. The very end of the run, on the 19th, looks like a full-on kite session with 28 mph winds and heavy rain, so leave the paddle board at home.
Keep your eyes on that Monday the 17th. It's the one.
Short Range ForecastMostly dry. Very mild (max 10°C on Wed afternoon, min 7°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Sun morning. Very mild (max 14°C on Sat afternoon, min 10°C on Fri night). Winds decreasing (fresh winds from the N on Sat night, calm by Mon afternoon). | ||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 14 | W 10 | WNW 8 | SW 19 | WSW 18 | WNW 11 | WSW 15 | WSW 18 | WSW 16 | WSW 16 | WSW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 2763 | 1438 | 1242 | 653 | 430 | 236 | 172 | 87 | 48 | 70 | 92 | 90 | 205 | 1122 | 455 | 304 | 334 | 724 | 515 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-off | cross-on | glassy | cross | cross-on | cross-off | cross-off | cross-off | cross-off | on | cross-on | cross-on | cross-on | on | off |
High Tide | 1:20AM2.63m | 1:49PM2.49m | 2:08AM2.51m | 2:44PM2.40m | 3:08AM2.39m | 3:52PM2.34m | 4:21AM2.30m | 5:11PM2.36m | 5:43AM2.31m | 6:28PM2.47m | 6:58AM2.42m | 7:34PM2.65m | |||||||
Low Tide | 7:44AM0.35m | 8:04PM0.51m | 8:35AM0.45m | 9:03PM0.62m | 9:37AM0.55m | 10:14PM0.69m | 10:49AM0.58m | 11:31PM0.66m | 12:03PM0.53m | 00:45AM0.54m | 1:11PM0.40m | 1:50AM0.37m | |||||||
 |  | | | | | | | |  |  | |  |  | | | |  |  | |
 | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — |
 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:43 | — | — | 5:43 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 4 | — | — | — | — | — |
Temp °C | 9 | 9 | 10 | 10 | 9 | 9 | 9 | 9 | 10 | 10 | 12 | 14 | 14 | 14 | 14 | 13 | 14 | 14 | 12 |
Feels °C | 2 | 2 | 5 | 5 | 6 | 6 | 8 | 6 | 7 | 8 | 7 | 10 | 9 | 13 | 11 | 10 | 12 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | WSW 18 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | W 10 | WNW 8 | WNW 7 | WSW 18 | WNW 11 | WNW 10 | SW 10 | SW 8 | WSW 16 | WSW 14 |
| kJ | 2763 | 1438 | 31 | 653 | 430 | 236 | 172 | 87 | 42 | 68 | 92 | 84 | 204 | 1122 | 307 | 304 | 91 | 724 | 515 |
Swell 2 Height (m) Direction Period (s) | — | — | WSW 18 | WSW 16 | SW 22 | SW 21 | WSW 21 | WSW 19 | SW 14 | WSW 13 | WSW 13 | SW 13 | SW 12 | WSW 19 | WSW 15 | WSW 14 | WSW 16 | WSW 7 | SSW 6 |
| kJ | — | — | 31 | 26 | 19 | 18 | 42 | 36 | 48 | 70 | 68 | 41 | 37 | 566 | 455 | 217 | 334 | 57 | 16 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 7 | W 7 | W 9 | — | WSW 19 | SW 19 | SW 12 | WSW 19 | WSW 7 | WSW 18 | WSW 13 | NW 7 | WSW 7 |
| kJ | — | — | — | — | — | — | 1 | 1 | 7 | — | 34 | 90 | 23 | 212 | 49 | 273 | 222 | 8 | 17 |
Wind waves Height (m) Direction Period (s) | SE 6 | SSE 7 | SW 13 | S 5 | S 5 | — | — | — | — | — | N 3 | NNE 3 | NW 8 | — | — | — | — | — | — |
| kJ | 54 | 152 | 1242 | 20 | 15 | — | — | — | — | — | 1 | 1 | 205 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 8 | 131 | 86 | 2 | 0 | 8 | 0 | 20 | 281 | 0 | 0 | 49 | 299 | 32 | 39 | 39 | 39 | 39 | 0 |
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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