Surf Forecasts:
Wainui Beach - Stockroute surf forecast from 15 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 6PM (local time) - 13ft (4.0m), 11s period, S swell with cross-shore winds.
- Most powerful swell: Tuesday 18 Aug, 9PM (local time) - 16ft (5.0m), 11s period, S swell with 6,651 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 6PM (local time) - 13ft (4.0m), 11s period with S swell.
Best Forecast Surf Conditions for Wainui Beach - Stockroute this week:
The surf forecast for Wainui Beach - Stockroute over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 6PM. The primary swell is predicted to be 4.0m and 11s period with a secondary swell of 2.5m and 12s. Another secondary swell of 1.4m and 15s is also forecast. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Wainui Beach - Stockroute in the next 16 days are 5.0m 11s and forecast to arrive on Tuesday (Aug 18) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Aug 16) at 9AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Wed 19th Aug) | 13ft (4.0m) 11s |
| Best Surf | 6PM (Wed 19th Aug) | 13ft (4.0m) 11s |
| Most Powerful | 9PM (Tue 18th Aug) | 16ft (5.0m) 11s |
Table - best surf conditions forecast for Wainui Beach - Stockroute over the next 16 days.
The Lowdown
G’day, Rusty here. Look, we’ve got a proper mixed bag coming up at Wainui Beach – Stockroute, with a big, messy start and a real standout finish if you’ve got the patience. This is an exposed, advanced-only wave that handles a south-east lean best.
The first week is pretty grim. Winds are howling, mostly cross or cross-off from the south-west and south, with speeds pushing 19 to 28 mph. That’s smashing up the 7 ft to 15 ft southerly swells, creating ugly, lumpy conditions. Even when the wave size gets up there, the quality is just no good for a paddle. You’d be looking at kite gear if anything.
There’s a tiny window on the morning of Thursday the 20th of August that’s worth a mention. The wind drops right off to a gentle cross-off from the west-south-west, making for clean 10 ft surf from the south-south-west, with a period of 13 seconds and a combined energy of 3555. The swells are still big and powerful, and with that clean face, an experienced local could score some proper juice, but the wind then switches back in the arvo.
Now, the Friday the 21st of August morning is a real flicker of hope. The wind swings to a light offshore north-westerly at just 6 mph, giving us smooth, clean 4 ft waves from the south-east. The period is 11 seconds, and the combined energy is 528 – it’s only a modest swell, but that offshore breeze will make it peel nicely. It’s a little gem for a quick session, but it’s not the big stand-out.
We then hit a quiet spell. From Saturday the 22nd right through to Wednesday the 27th, wave heights drop below 3 ft and swell energy dives (64 to 379). It’s flat and small, with not enough push to hold you up. A few glassy mornings on the tiny stuff, but really just a chance to get the wetsuit on for nothing.
Here’s the pay-off – Thursday the 27th of August morning. This is the one to circle. We get a solid 13 ft southerly swell pumping in, with a 10-second period and a massive combined energy reading of 4952. The wind is a light offshore north-easterly at just 6 mph, plus a cross-off direction, making for a clean face. The report says it might be a bit too big for the break, but for a confident charger on an advanced wave like Stockroute, that’s the kind of size that gets the heart thumping. This is the best on offer.
Friday the 28th and Saturday the 29th mornings keep things going with excellent, powerful waves around 8 ft to 10 ft, clean with light offshore breezes and a long, powerful 17-second period on the Saturday. This is serious, world-class potential for the experienced crew.
By Sunday the 30th, it settles to a more manageable 4 ft, very clean, and into the final morning on Monday the 31st of August, it’s a glassy 3 ft finish.
Water temps? Don’t worry about a number, it’s about average for this time of year, no major shift to talk about.
Overall, you’re waiting nearly a week for the good stuff, but the final weekend and the week after that are where we live. That Thursday the 27th is the true standout. Keep an eye on it, and charge hard.
Rusty.
Short Range ForecastHeavy rain (total 33mm), heaviest during Sun afternoon. Very mild (max 12°C on Sun morning, min 7°C on Mon night). Winds increasing (moderate winds from the SW on Sun morning, strong winds from the SSW by Tue night). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Wed night. Very mild (max 15°C on Fri morning, min 7°C on Thu night). Winds decreasing (strong winds from the SSW on Wed morning, calm by Fri morning). | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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) | E 8 | SSW 16 | SSE 10 | SSE 10 | S 10 | S 9 | S 9 | SSE 10 | SSE 12 | SSE 12 | S 12 | S 14 | SSW 13 | SE 9 | ESE 8 | ESE 8 | SSE 11 | SSE 15 | SSE 13 | SSE 12 | SSE 12 |
Wave Graph | |||||||||||||||||||||
205 | 229 | 1088 | 1249 | 2375 | 1655 | 1283 | 1461 | 3754 | 3797 | 5345 | 3857 | 2809 | 396 | 126 | 90 | 214 | 485 | 195 | 115 | 123 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-off | cross | off | off | glassy | off | off | glassy | off |
High Tide | 8:51PM2.10m | 9:16AM2.02m | 9:37PM2.07m | 10:02AM2.01m | 10:22PM2.02m | 10:47AM1.96m | 11:06PM1.95m | 11:32AM1.90m | 11:48PM1.87m | 12:17PM1.84m | 00:30AM1.79m | 1:01PM1.78m | 1:14AM1.71m | ||||||||
Low Tide | 2:37PM0.43m | 3:10AM0.46m | 3:25PM0.47m | 3:54AM0.48m | 4:11PM0.52m | 4:39AM0.51m | 4:56PM0.58m | 5:24AM0.56m | 5:42PM0.65m | 6:09AM0.62m | 6:28PM0.72m | 6:53AM0.69m | 7:17PM0.77m | ||||||||
6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | |
— | 5:30 | — | — | 5:31 | — | — | 5:32 | — | — | 5:34 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — | |
mm | — | 9 | 7 | 2 | 1 | 3 | — | 4 | 7 | 1 | 1 | 6 | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 11 | 10 | 9 | 9 | 9 | 10 | 9 | 8 | 9 | 10 | 10 | 12 | 12 | 10 | 15 | 14 | 11 | 15 | 16 | 11 |
Feels °C | 7 | 5 | 1 | 0 | 1 | 1 | 0 | -1 | -2 | -1 | 2 | 4 | 7 | 7 | 7 | 13 | 12 | 7 | 13 | 14 | 7 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 9 | ESE 9 | ESE 9 | SE 9 | SE 9 | SSE 9 | E 18 | — | — | SSE 12 | SSE 14 | SE 10 | SE 9 | ESE 8 | ESE 8 | SSE 11 | SSE 15 | SSE 13 | SSE 12 | SSE 12 |
205 | 194 | 343 | 265 | 1033 | 844 | 623 | 6 | — | — | 3010 | 2803 | 499 | 396 | 126 | 90 | 173 | 485 | 195 | 115 | 123 | |
Swell 2 Height (m) Direction Period (s) | S 5 | SSE 16 | S 19 | S 17 | ESE 10 | SSE 15 | SSE 14 | — | — | — | — | — | SSE 13 | SSE 13 | SSE 8 | SSE 9 | SSE 16 | ESE 10 | SE 10 | SE 10 | ESE 13 |
41 | 87 | 66 | 142 | 106 | 72 | 40 | — | — | — | — | — | 482 | 170 | 96 | 79 | 214 | 63 | 48 | 24 | 16 | |
Swell 3 Height (m) Direction Period (s) | SSE 18 | SSW 16 | SE 15 | — | S 16 | — | E 9 | — | — | — | — | — | SE 12 | E 13 | SSE 12 | SSE 11 | ESE 8 | — | SE 10 | SE 14 | ESE 9 |
103 | 229 | 9 | — | 126 | — | 26 | — | — | — | — | — | 69 | 3 | 46 | 70 | 45 | — | 45 | 8 | 8 | |
Wind waves Height (m) Direction Period (s) | SSW 5 | S 6 | SSE 10 | SSE 10 | S 10 | S 9 | S 9 | SSE 10 | SSE 12 | SSE 12 | S 12 | S 14 | SSW 13 | — | — | NNW 2 | — | NW 3 | W 4 | — | N 3 |
90 | 72 | 1088 | 1249 | 2375 | 1655 | 1283 | 1461 | 3754 | 3797 | 5345 | 3857 | 2809 | — | — | 1 | — | 2 | 2 | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 40 | 65 | 116 | 309 | 119 | 119 | 65 | 116 | 257 | 123 | 123 | 65 | 65 | 17 | 45 | 0 | 0 | 3 | 0 | 0 | 3 |
Best forecast wave conditions in Gisborne and Mahia | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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Information about the Wainui Beach - Stockroute Surf forecast
The above surf forecast table for Wainui Beach - Stockroute provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Wainui Beach - Stockroute can be found by selecting the local surf guide option on the grey menu. Our Wainui Beach - Stockroute 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 (Wainui Beach - Stockroute) 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 Wainui Beach - Stockroute 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.
Are you planning a holiday in Gisborne and Mahia? If you are looking for accommodation near Wainui Beach - Stockroute, camping, hotels and holiday cottages in Gisborne and Mahia, consider staying in Gisborne which is 9 km (6 miles) away.











