Surf Forecasts:
O'Neills Bay surf forecast from 17 Jul 2026:
- Best quality surf: Monday 20 Jul, 3AM (local time) - 6ft (1.9m), 15s period, SW swell with glassy winds.
- Most powerful swell: Sunday 19 Jul, 3AM (local time) - 8ft (2.5m), 17s period, SW swell with 3,710 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 3AM (local time) - 6ft (1.9m), 15s 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 Monday (Jul 20) at 3AM. The primary swell is predicted to be 1.9m and 15s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at O'Neills Bay in the next 16 days are 2.5m 17s and forecast to arrive on Sunday (Jul 19) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Jul 20) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 20th Jul) | 6ft (1.9m) 15s |
| Best Surf | 3AM (Mon 20th Jul) | 6ft (1.9m) 15s |
| Most Powerful | 3AM (Sun 19th Jul) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for O'Neills Bay over the next 16 days.
The Lowdown
Alright, mate. Rusty here. Let’s run through what’s cooking at O’Neills Bay.
For the next week and a bit, we’ve got some decent size on the way, but the wind is gonna be the main character for a lot of it. The real standout window is a run of clean, glassy conditions from Monday the 20th through to Wednesday the 29th, but you’ve got to be smart about which session you pick.
The first few days are a bit of a write-off. Friday the 17th has a 6ft WSW swell rolling in, but it’s cross-on at 9 mph, so it’s gonna be choppy and messy. Water temp is 58°, which is normal for the season. Saturday and Sunday the 18th and 19th see the swell building to 7ft-8ft on Sunday, but the wind is onshore and gusty. Not much to get excited about.
Then we get our first real highlight. Monday the 20th is the pick of the first week. The swell drops back to 6ft from the SW (14-second period), but the wind swings to a light offshore from the ENE at 6 mph. That’s clean, lined-up surf with moderate energy (1321). The morning and afternoon both look excellent. This is the one to aim for if you want some proper clean waves.
Tuesday the 21st is still good, with the swell easing to 4ft-4ft from the SW. The morning is clean with a cross-off, but the afternoon gets glassy with a 3 mph southerly. It’ll be smaller, but perfect for a longboard or a fun craft. After that, Wednesday the 22nd and Thursday the 23rd drop off in size and the wind gets messy again, so it’s a bit of a lull.
The next standout is a cracker, but it’s a long way off. Wednesday the 29th of July is looking like the best of the whole forecast. We’ve got a solid 6ft WSW swell, but the wind is glassy or light cross-off, and the energy is moderate (1423). The afternoon session is forecast for “excellent surf conditions for experienced surfers” – 6ft, clean, and glassy. This is a potential late-month gem. Thursday the 30th morning also looks clean with a 6ft WSW swell and light offshore winds. Keep an eye on these days.
The end of the period into early August sees a few more marginal days, but nothing that stands out like the 29th. There’s a big 12ft SW swell on the 25th but with a 25 mph westerly, it’s a write-off for surfing – more of a kite session.
So, bottom line: if you’re keen, get out on Monday the 20th for the cleanest early window, and mark your calendar for Wednesday the 29th of July – that could be the real late-winter treat.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun night. Very mild (max 14°C on Fri morning, min 12°C on Fri afternoon). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Mon morning. Very mild (max 14°C on Wed morning, min 10°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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) | WSW 15 | WSW 15 | SW 15 | SW 15 | SW 15 | SW 18 | SW 17 | SW 16 | SW 15 | SW 14 | WSW 14 | SW 14 | WSW 13 | SW 13 | WSW 13 | WSW 12 | SW 12 | SW 12 | SW 13 | SW 13 | WSW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1297 | 1785 | 2307 | 2089 | 1956 | 3519 | 3119 | 2610 | 1753 | 1321 | 1080 | 754 | 590 | 501 | 444 | 255 | 205 | 118 | 336 | 479 | 739 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | on | on | on | cross-on | off | off | cross-off | cross-off | glassy | glassy | on | on | on | cross-on | cross-on | cross-on |
High Tide | 11:31AM2.83m | 11:53PM3.03m | 12:17PM2.75m | 00:38AM2.90m | 1:02PM2.64m | 1:22AM2.73m | 1:49PM2.50m | 2:08AM2.54m | 2:39PM2.37m | 2:57AM2.35m | 3:34PM2.25m | 3:53AM2.20m | 4:36PM2.17m | ||||||||
Low Tide | 5:41PM0.01m | 6:14AM0.05m | 6:28PM0.12m | 6:59AM0.16m | 7:14PM0.28m | 7:45AM0.30m | 8:02PM0.46m | 8:32AM0.46m | 8:53PM0.64m | 9:23AM0.61m | 9:50PM0.79m | 10:19AM0.73m | 10:53PM0.88m | ||||||||
 |  |  | |  |  | | |  |  | | | | | |  | | | | | | |
 | 7:31 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — |
 | — | 5:24 | — | — | 5:25 | — | — | 5:25 | — | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — |
mm | — | — | — | — | — | — | — | — | 4 | 3 | 3 | 1 | — | — | — | 1 | — | 1 | 1 | 4 | 2 |
Temp °C | 14 | 13 | 13 | 12 | 13 | 14 | 14 | 14 | 13 | 13 | 12 | 11 | 12 | 13 | 13 | 14 | 14 | 14 | 13 | 13 | 13 |
Feels °C | 11 | 9 | 10 | 8 | 9 | 9 | 9 | 10 | 11 | 11 | 10 | 9 | 11 | 12 | 10 | 10 | 10 | 11 | 12 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | WSW 15 | SW 15 | SW 15 | SW 15 | SW 18 | SW 17 | SW 16 | SW 15 | SW 14 | WSW 14 | SW 14 | WSW 13 | SW 13 | WSW 13 | WSW 12 | SW 12 | SW 7 | SW 13 | SW 13 | WSW 12 |
| kJ | 1297 | 1785 | 2307 | 2089 | 1956 | 3519 | 3119 | 2610 | 1753 | 1321 | 1080 | 754 | 590 | 501 | 444 | 255 | 205 | 52 | 336 | 479 | 739 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 22 | — | — | — | — | — | W 22 | — | SW 20 | WSW 19 | SW 18 | WSW 16 | WSW 16 | SW 12 | SW 6 | — | — |
| kJ | — | — | — | — | 74 | — | — | — | — | — | 9 | — | 15 | 36 | 13 | 51 | 51 | 118 | 36 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 15 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 55 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | SW 17 | — | — | — | — | — | — | — | — | — | WSW 3 | SW 5 | — | — | WSW 6 | WSW 6 |
| kJ | — | — | — | — | — | 2893 | — | — | — | — | — | — | — | — | — | 3 | 16 | — | — | 42 | 55 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 39 | 67 | 39 | 39 | 67 | 67 | 78 | 78 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 119 | 223 | 161 | 49 | 344 | 333 |
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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