Surf Forecasts:
O'Neills Bay surf forecast from 31 Aug 2026:
- Best quality surf: Sunday 6 Sep, 3AM (local time) - 8ft (2.5m), 14s period, WSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 6AM (local time) - 13ft (4.0m), 14s period, SW swell with 5,879 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 3AM (local time) - 8ft (2.5m), 14s period with WSW 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 Sunday (Sep 06) at 3AM. The primary swell is predicted to be 2.5m and 14s period. 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 4.0m 14s and forecast to arrive on Tuesday (Sep 01) at 6AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 6th Sep) | 8ft (2.5m) 14s |
| Best Surf | 3AM (Sun 6th Sep) | 8ft (2.5m) 14s |
| Most Powerful | 6AM (Tue 1st Sep) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for O'Neills Bay over the next 16 days.
The Lowdown
Alright, let's talk about what's coming up for O'Neills Bay. Honestly, the first week is a rough one. We’ve got a massive, powerful south-west swell pouring in, hitting 13ft on Tuesday, easing slowly, but the wind is screaming from the same direction, right on it or cross-on, up to 22 mph. It’s blown out, lumpy, and ugly. The wave energy is huge (5748), but for a surfer on a paddle board, it’s no good—this setup looks more interesting for the kite crew.
The onshore wind backs off a touch on Thursday the 3rd, but we’re still looking at 6ft of cross-on, choppy surf. Friday the 4th brings light rain and fresh cross-on winds with 7ft to 8ft waves. Not what you want.
Things start to turn on Saturday the 5th. The swell drops a bit, and the wind shifts offshore—south-west at 12 mph in the morning, easing to 9 mph in the afternoon. Wave heights are still a solid 8ft to 10ft, with a long 14-second period from the west-southwest. The energy is still hefty (3132). It’s still a bit marginal, but it’s the first sign of some cleaner lines.
Now, the real standout? Monday the 14th of September. The morning has a light cross-shore, but the afternoon goes glassy. Dead calm wind. The swell is a clean 6ft from the west-southwest at 14 seconds, offering proper groundswell. The energy is moderate (1463), and the conditions are glassy. For experienced surfers, this is the session to circle. That’s your best bet of the whole outlook. Being a long-period south-west groundswell, the waves will have solid shape and clean faces at O’Neills if you’re in the right spot.
Before that, there’s a small window on Sunday the 6th morning with a 8ft swell and a cross-offshore north wind—clean but fairly strong, with a very long 15-second period. It’s worth a look if you’re comfortable in the rips. Tuesday the 15th also offers some clean, cross-off waves around 8ft, but again, for stronger paddlers.
Water temp is about average for this time of year at O’Neills, nothing unusual.
So, to wrap it up: the first week is a write-off—windy and messy. The best session is that Monday arvo on the 14th—glassy, clean, proper south-west groundswell. After that, Tuesday and Wednesday mornings on the 15th and 16th look okay with clean, cross-off winds. Lock in that Monday the 14th.
Rusty.
Short Range ForecastMostly dry. Very mild (max 15°C on Wed afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the WSW on Mon night, light winds from the WNW by Wed night). | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Sun afternoon. Very mild (max 17°C on Sun morning, min 10°C on Sat night). Winds increasing (light winds from the NW on Sat night, strong winds from the NW by Sun afternoon). | ||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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) | WSW 14 | SW 14 | SW 14 | SW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 11 | WSW 14 | W 10 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 15 | WSW 16 | WSW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 5792 | 5726 | 4838 | 3243 | 2180 | 1778 | 1493 | 1277 | 1143 | 487 | 1556 | 1352 | 2934 | 2515 | 3040 | 2315 | 2483 | 2331 | 3574 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | cross-on | cross-on | cross | cross-on | cross-on | on | on | on | cross | cross-off | cross | cross-on |
High Tide | 11:33PM2.88m | 11:56AM2.77m | 00:11AM2.79m | 12:37PM2.69m | 00:54AM2.65m | 1:24PM2.56m | 1:45AM2.47m | 2:21PM2.42m | 2:49AM2.31m | 3:35PM2.32m | 4:12AM2.21m | 5:03PM2.33m | |||||||
Low Tide | 5:50AM0.09m | 6:07PM0.22m | 6:30AM0.19m | 6:51PM0.34m | 7:16AM0.33m | 7:43PM0.49m | 8:11AM0.49m | 8:46PM0.64m | 9:18AM0.62m | 10:03PM0.73m | 10:37AM0.66m | 11:26PM0.69m | |||||||
 |  |  | | | | |  | |  |  |  | | | | | |  |  | |
 | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — |
 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — |
mm | — | — | — | — | — | — | — | — | — | — | 3 | 2 | — | — | — | — | — | 7 | 4 |
Temp °C | 13 | 13 | 13 | 13 | 14 | 15 | 14 | 15 | 15 | 14 | 15 | 15 | 14 | 14 | 14 | 12 | 17 | 16 | 15 |
Feels °C | 6 | 5 | 6 | 8 | 10 | 10 | 10 | 11 | 11 | 11 | 9 | 10 | 9 | 10 | 11 | 10 | 12 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | — | SW 24 | — | SW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 11 | WSW 14 | WSW 16 | WNW 9 | WSW 14 | WSW 14 | WSW 14 | WSW 15 | WSW 16 | — |
| kJ | — | 22 | — | 3243 | 2180 | 1778 | 1493 | 1277 | 1143 | 487 | 1556 | 545 | 255 | 2515 | 3040 | 2315 | 2483 | 2331 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | WSW 21 | WSW 20 | SW 18 | SW 16 | — | — | WSW 14 | — | WSW 16 | — | WNW 9 | WNW 9 | — | — | — | — |
| kJ | — | — | — | 45 | 149 | 319 | 65 | — | — | 419 | — | 539 | — | 153 | 92 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 14 | SW 14 | SW 14 | — | — | — | — | — | — | — | NW 6 | W 10 | WSW 15 | — | — | — | — | WNW 8 | WSW 16 |
| kJ | 5792 | 5726 | 4838 | — | — | — | — | — | — | — | 92 | 1352 | 2934 | — | — | — | — | 392 | 3574 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 78 | 130 | 78 | 220 | 223 | 347 | 294 | 333 | 348 | 333 | 348 | 369 | 67 | 223 | 223 | 281 | 369 | 379 | 78 |
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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