Wainui Beach - Stockroute Surf Break

Lat Long: 38.69° S 178.08° E

Wainui Beach - Stockroute Surf Forecast and Surf Report

Issued: 11 am 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Wainui Beach - Stockroute sea temperature is
12.7°C
1.2° 

Wainui Beach - Stockroute surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Wainui Beach - Stockroute surf forecast from 31 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 3AM (local time) - 11ft (3.5m), 14s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 6PM (local time) - 16ft (5.0m), 11s period, SSW swell with 5,528 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 1 Sep, 3AM (local time) - 11ft (3.5m), 14s period with SSW 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 Tuesday (Sep 01) at 3AM. The primary swell is predicted to be 3.5m and 14s period with a secondary swell of 1.5m and 9s. Another secondary swell of 1.2m and 14s is also forecast. The wind is predicted to be cross-offshore 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 Monday (Sep 07) at 6PM. 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 Monday (Aug 31) at 9PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Tue 1st Sep)11ft (3.5m) 14s
Best Surf 3AM (Tue 1st Sep)11ft (3.5m) 14s
Most Powerful 6PM (Mon 7th Sep)16ft (5.0m) 11s

Table - best surf conditions forecast for Wainui Beach - Stockroute over the next 16 days.


The Lowdown

G’day, Rusty here.

Alright, we’ve got a bit of a slow start, but this 16-day run has some serious potential if you’re patient. The first real surfable days aren’t until the start of September, so we’re looking at a gap of a couple of days right now. The main event is Wainui Beach - Stockroute, a beach and reef setup that’s for advanced crew only. Water temp’s sitting at 55°, which is a bit colder than normal for this time of year – about a degree and change off the average – so you’ll want the thick rubber.

Monday the 31st of August is pretty marginal. We’ve got a clean 2 ft SSE swell with a long 15 to 17 second period, and a fresh offshore WNW breeze at 19 mph. The combined energy is moderate (293-414), but the score says it’s only just surfable. Not worth the paddle, really.

Tuesday the 1st of September sees a big jump. Morning brings a powerful 10 ft S swell at 13 seconds with a cross-off SSW breeze at 12 mph. The energy is very strong (4075), but the wind is messy, making it marginal. The afternoon drops to 6 ft SSE with a gentle cross-onshore. Not the cleanest.

Now, Wednesday the 2nd of September is the standout. Morning session has a clean 6 ft SSE groundswell at 14 seconds, with a moderate offshore NW breeze at 12 mph. Energy is strong (1453). But the real magic is the afternoon: glassy conditions with no wind, a solid 6 ft SSE swell packing 17 second period, and enormous energy (1954). The forecast says excellent for experienced surfers, and with that long period, it’ll be lined up and powerful. It’s a reef setup, so those long period waves will hold shape wonderfully. Crowds are possible, so get out there early.

Thursday the 3rd backs off a bit – 4 ft SSE in the morning and 3 ft in the afternoon, both with clean offshore winds. Good but not epic.

Then we hit a flat spell. From Friday the 4th through Sunday the 6th, it’s tiny and weak – 1 ft to 3 ft, mostly messy, and energy drops below 100 in some spots. Not worth talking about.

Monday the 7th of September has a 5 ft S swell but with a fresh cross-off, and the afternoon jumps to 10 ft SSE but the wind is full cross. Rough.

Tuesday the 8th of September is a beast, but only for the brave. Morning sees a massive 15 ft S swell at 11 seconds, with light cross-off wind and clean conditions. The energy is a staggering 7577. The file says it might be too big for this break, so this is strictly big-wave, expert territory. If you’re not on a gun, stay on the beach.

Wednesday the 9th is still solid – 7 ft S swell in the morning with light offshore wind and clean. Energy is 894. Good.

After that, it fades again. Thursday the 10th through Sunday the 14th of September sees mixed conditions – small ESE swells, mostly under 4 ft, with variable winds. Some glassy mornings on the 10th and clean conditions on the 11th, but nothing that’ll get the heart racing.

Then, another highlight: Tuesday the 15th of September. Morning brings a clean 6 ft SSE groundswell with a very long 16 second period, light offshore NNW breeze at 6 mph, and strong energy (1493). It’ll be clean and powerful, but the afternoon turns choppy onshore. Get that morning session.

So, the two real standouts are the Wednesday afternoon of the 2nd of September and the Tuesday morning of the 15th of September. The 2nd is glassy perfection, the best of the run. The 15th is a clean, long-period groundswell that’ll have plenty of juice. Both are for experienced surfers only.

Remember, the long-range stuff on the 15th is promising but less certain. For now, mark your calendar for the 2nd.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Mon morning, min 7°C on Tue night). Winds decreasing (fresh winds from the WNW on Mon morning, calm by Wed afternoon).

Days 4-6 Weather Summary

Some drizzle, heaviest during Fri afternoon. Very mild (max 19°C on Thu morning, min 7°C on Fri night). Wind will be generally light.

Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
2
4
2
4
4
4
3
2
2
1
0
0
0
1
0
1
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SSE
17
0.9
SSE
15
2.1
SSW
9
3
S
13
1.9
SSE
13
2.2
SSE
14
1.7
SSE
14
1.8
SSE
17
1.5
SSE
15
1.1
SSE
13
0.9
SSE
13
0.7
SSE
12
0.5
SSE
11
0.4
SSE
10
0.2
SSE
10
0.7
SSE
7
0.9
SSE
9
0.8
SSE
10
0.5
SSE
9
0.4
SSE
9
0.5
NE
8
Wave Graph
Metric surfscale
Energy kJ
229
335
662
2599
1236
1875
1008
1938
983
434
261
123
68
42
9
52
108
105
46
30
28
Wind (km/h)
30
WNW
30
WNW
20
SSW
20
SW
15
SSE
15
NW
20
NW
0
E
20
WNW
20
NW
15
WNW
15
NW
25
NNW
20
NNW
10
W
15
NW
20
NE
15
NW
20
NNW
25
N
30
WNW
Wind State
off
off
cross
cross-off
cross-on
off
off
glassy
off
off
off
off
cross-off
cross-off
off
off
cross-on
cross-off
cross-off
cross-off
off
High Tide
8:24PM2.02m
8:46AM1.99m
9:04PM2.02m
9:29AM2.00m
9:48PM1.98m
10:14AM1.99m
10:35PM1.94m
11:03AM1.96m
11:23PM1.89m
11:55AM1.92m
00:14AM1.84m
12:49PM1.88m
1:09AM1.78m
Low Tide
2:10PM0.50m
2:42AM0.47m
2:52PM0.48m
3:22AM0.44m
3:36PM0.48m
4:05AM0.44m
4:22PM0.50m
4:53AM0.45m
5:11PM0.54m
5:44AM0.47m
6:05PM0.58m
6:37AM0.51m
7:03PM0.63m
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
cloud
rain showers
clear
clear
clear
part cloud
cloud
light rain
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:31
6:30
6:28
6:26
6:26
6:24
6:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:44
5:45
5:45
5:46
5:47
5:47
5:49
 mm
1
1
Temp °C
17
17
14
10
11
8
16
17
13
19
19
15
16
17
13
15
14
11
16
15
14
Feels °C
10
11
9
5
7
5
14
16
8
15
15
12
12
13
8
12
9
8
10
12
8
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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