Surf Forecasts:
Wainui Beach - Stockroute surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 3PM (local time) - 11ft (3.5m), 11s period, S swell with cross-shore winds.
- Most powerful swell: Wednesday 19 Aug, 12PM (local time) - 13ft (4.0m), 11s period, S swell with 3,488 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 3PM (local time) - 11ft (3.5m), 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 3PM. The primary swell is predicted to be 3.5m and 11s period with a secondary swell of 2.2m and 11s. Another secondary swell of 1.6m and 9s 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 4.0m 11s and forecast to arrive on Wednesday (Aug 19) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Aug 22) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Wed 19th Aug) | 11ft (3.5m) 11s |
| Best Surf | 3PM (Wed 19th Aug) | 11ft (3.5m) 11s |
| Most Powerful | 12PM (Wed 19th Aug) | 13ft (4.0m) 11s |
Table - best surf conditions forecast for Wainui Beach - Stockroute over the next 16 days.
The Lowdown
G’day, I’m Rusty, and I’ve been staring at the charts for our patch. Let’s break it down for Wainui Beach – Stockroute.
Alright, right off the bat, we’ve got a big, messy pulse of energy hitting the coast on Wednesday the 19th. The combined swell energy is a massive 2936 (moderate wave energy) on Wednesday morning, ramping up to 4994 (strong wave energy) in the afternoon. That’s a solid 10ft to 12ft swell from the SSE and S, but the wind is a strong cross-shore howling at 25 mph. It’s going to be a messy, bumpy, challenging day. The water’s a bit colder than normal at 55°, a full 1° below average, so you’ll want a good hood and booties. This is expert territory only, and honestly, with that much wind and that size, this setup looks more interesting for kite surfing than paddle surfing.
By Thursday the 20th, the swell has dropped to a more manageable 6ft from the SSW, but the period is short—only 8 seconds. The wind is a cross-offshore on the morning, leaving it clean, but the energy is weak (1264 and 978). It’s marginal, with questionable tide conditions. Not a standout.
Friday the 21st is a real tease. The swell is tiny—2ft to 3ft from the SSE, but the period is a very long 16 seconds. That’s proper groundswell energy. The morning is clean with a light cross-offshore NW wind, but the combined energy is only 341 (weak wave energy). It’ll be small and glassy, but with that long period, the sets will be few and far between. It’s a fun little novelty for the loggers, but not a main event.
Saturday the 22nd brings a change. The morning sees a clean 3ft SSE swell with a 12-second period, and the wind is a moderate offshore from the NW at 16 mph. The energy is low at 201 (weak wave energy). The afternoon is even smaller. Not a big day, but a nice moment for a clean, small-wave session.
Sunday the 23rd through Tuesday the 25th is a run of very small, clean surf. The swell is between 1.0ft and 2ft, mostly from the SSE, with periods varying from 10 to 15 seconds. The winds are offshore or glassy, keeping the conditions clean. The combined energy is weak, in the 50-221 range. The standout moment here is Tuesday the 25th afternoon: a 2ft SSE swell with a 15-second period, and the wind is dead calm—glassy conditions. The energy is 246 (weak wave energy). It’s a tiny, perfect, glassy afternoon for a longboard.
The rest of the run from the 26th of August through to the 2nd of September is largely poor. The swell is tiny, the wind is often cross-on or onshore, and the energy is weak. There are a few clean moments, like the morning of the 28th with a 3ft SSE swell, 15-second period, and light cross-offshore wind, but the energy is only 429 (weak wave energy). It’s surfable, but nothing to write home about.
Now, the real standout of the entire 16-day window is Thursday the 3rd of September. The morning is looking exceptional. A 4ft SSE swell with a very long 16-second period, pushing a combined energy of 666 (moderate wave energy). The wind is a slight air from the WNW, leaving it glassy. That’s the kind of morning that gets the heart pumping. The sets will be clean, lined-up, and full of potential. The afternoon holds up with a 4ft swell and 15-second period, but the wind turns light cross-onshore, making it a bit crinkly. The morning is the one to lock in. Just remember, this is nine days out, so it’s promising but not a lock.
Overall, there’s a big, wild start to the period, then a long gap of small, clean days, and then a golden window on the 3rd of September. The best on offer is that Thursday the 3rd morning—that’s your standout.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Wed morning. Very mild (max 13°C on Fri morning, min 8°C on Wed night). Winds decreasing (strong winds from the SSW on Wed morning, light winds from the NE by Fri morning). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Sat afternoon, min 9°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | SSE 11 | S 11 | SSW 14 | SE 8 | S 8 | SSE 8 | SSE 16 | SSE 16 | SSE 14 | SSE 12 | SSE 11 | SSE 11 | SSE 10 | SE 10 | ESE 13 | ESE 13 | SSE 16 | SSE 15 | SSE 14 | SSE 15 | SSE 14 |
Wave Graph | |||||||||||||||||||||
2513 | 2973 | 3434 | 534 | 493 | 157 | 151 | 534 | 322 | 164 | 115 | 78 | 39 | 33 | 33 | 33 | 90 | 228 | 201 | 186 | 213 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross | off | cross-off | cross-on | cross-off | off | cross-off | off | off | off | off | off | cross-on | cross-off | off | glassy | off |
High Tide | 10:47AM1.96m | 11:06PM1.95m | 11:32AM1.90m | 11:48PM1.87m | 12:17PM1.84m | 00:30AM1.79m | 1:01PM1.78m | 1:14AM1.71m | 1:46PM1.73m | 2:05AM1.65m | 2:36PM1.70m | 3:08AM1.63m | 3:41PM1.69m | ||||||||
Low Tide | 4:56PM0.58m | 5:24AM0.56m | 5:42PM0.65m | 6:09AM0.62m | 6:28PM0.72m | 6:53AM0.69m | 7:17PM0.77m | 7:38AM0.75m | 8:09PM0.81m | 8:27AM0.80m | 9:07PM0.83m | 9:27AM0.82m | 10:10PM0.83m | ||||||||
6:48 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | |
— | 5:34 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | |
mm | 2 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 10 | 9 | 9 | 11 | 12 | 9 | 13 | 13 | 11 | 16 | 18 | 14 | 16 | 18 | 14 | 16 | 14 | 13 | 16 | 18 | 14 |
Feels °C | 2 | 1 | 3 | 6 | 7 | 6 | 11 | 9 | 8 | 11 | 14 | 8 | 10 | 15 | 9 | 14 | 10 | 10 | 14 | 16 | 10 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SSE 11 | SE 9 | SE 8 | SSE 8 | SSE 8 | ESE 8 | SSE 16 | SSE 14 | SSE 12 | SSE 11 | SSE 11 | SSE 10 | SE 10 | ESE 13 | ESE 13 | SSE 16 | SSE 15 | SSE 14 | SSE 15 | SSE 14 |
373 | 1242 | 540 | 490 | 207 | 157 | 111 | 534 | 322 | 164 | 115 | 78 | 39 | 24 | 33 | 33 | 90 | 228 | 201 | 186 | 213 | |
Swell 2 Height (m) Direction Period (s) | SE 14 | ESE 9 | SSE 14 | SSE 14 | ESE 9 | ESE 9 | SSE 9 | ESE 10 | ESE 10 | ESE 9 | SE 8 | ESE 13 | ESE 13 | ESE 13 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | ESE 12 | ESE 13 | ESE 12 |
50 | 355 | 911 | 189 | 180 | 124 | 79 | 170 | 85 | 33 | 17 | 32 | 34 | 33 | 9 | 16 | 25 | 26 | 15 | 16 | 13 | |
Swell 3 Height (m) Direction Period (s) | — | SSE 16 | — | SE 12 | SSE 13 | SSE 17 | SSE 16 | S 16 | S 16 | E 15 | E 14 | ESE 8 | — | NE 4 | NE 4 | S 18 | SSE 12 | ESE 13 | NE 11 | SE 13 | NE 10 |
— | 424 | — | 51 | 98 | 57 | 151 | 243 | 127 | 4 | 4 | 6 | — | 1 | 1 | 6 | 46 | 33 | 5 | 44 | 4 | |
Wind waves Height (m) Direction Period (s) | SSE 11 | S 11 | SSW 14 | SSW 8 | S 8 | — | — | — | NNE 3 | — | — | — | — | WNW 2 | — | — | — | NNE 11 | — | — | — |
2513 | 2973 | 3434 | 534 | 493 | — | — | — | 2 | — | — | — | — | 1 | — | — | — | 12 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 135 | 119 | 17 | 40 | 45 | 0 | 0 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Gisborne and Mahia | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











