Onemana Surf Break

Lat Long: 37.15° S 175.88° E

Onemana Surf Forecast and Surf Report

Issued: 5 pm 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onemana sea temperature is
14.9° C
0.2° 

Onemana surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Onemana surf forecast from 19 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 6AM (local time) - 2.5ft (0.7m), 9s period, ESE swell with cross-offshore winds.
  • Most powerful swell: Thursday 20 Aug, 6AM (local time) - 2.5ft (0.7m), 9s period, ESE swell with 80 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 6AM (local time) - 2.5ft (0.7m), 9s period with ESE swell.

Best Forecast Surf Conditions for Onemana this week:

The surf forecast for Onemana over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 6AM. The primary swell is predicted to be 0.7m and 9s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Onemana in the next 16 days are 0.7m 9s and forecast to arrive on Thursday (Aug 20) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Sunday (Aug 23) at 12PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Thu 20th Aug)2.5ft (0.7m) 9s
Best Surf 6AM (Thu 20th Aug)2.5ft (0.7m) 9s
Most Powerful 6AM (Thu 20th Aug)2.5ft (0.7m) 9s

Table - best surf conditions forecast for Onemana over the next 16 days.


The Lowdown

Alright, let’s get into it. The next couple of weeks are looking pretty bleak for us here at Onemana, to be honest. We’ve got a serious flat spell on the cards before things finally start to wake up. Don’t get too excited just yet though, because the first real pulse of swell looks like it’ll be messy and blown out. There are a couple of days that could offer a salvageable wave, but we’re not talking about anything epic.

The water temp is sitting at a normal 59° right now, which is pretty standard for this time of year. Bring the booties and maybe a hood.

The good news? The first proper surf on offer shows up on Thursday the 3rd of September, and it’s the standout of the whole window. Before that, we’re looking at a long stretch of tiny, weak surf. From the 19th onward, it’s mostly below 2ft with weak energy readings, way down in the single digits. There’s a little bump on the 20th with some 2ft easterly swell, but the winds are a bit cross-off and it’s just ordinary.

The gap between any real surf is long. We’re talking about a run of flat, poor days from the 19th through to the 28th. The swell does start to build around the 29th and 30th, but it’s still small and the winds are messy. Then the 31st of August sees a proper jump in size—up to 3ft, then 6ft by the afternoon—but the wind goes onshore from the southeast and it gets choppy. Not what we want.

The real kicker comes on the 1st and 2nd of September. Swell heights get up to 6ft and 5ft, with the energy reading into the 700s and 500s, so there’s definitely power behind it. But the wind is cross-shore and strong, 25-30 km/h, making it lumpy and messy. The 2nd of September stays in that 4-4ft range with moderate energy (430-534), but again, the cross-shore wind chops it up.

Now, your one to watch: Thursday morning, the 3rd of September. The swell drops slightly to 5ft from the ENE with a short 7-second period, but the wind is a clean cross-off from the SSW at 15 km/h. That’s the first time we get clean, surfable conditions with real size. The energy is at 353 (moderate). This is the best bit of the whole forecast, and it’s the only day I’d seriously point you to. It’s not the biggest, but with those clean conditions, Onemana will actually hold some shape. Keep in mind the short period means the sets will be a little crumbly, but it’s the only clean window we get.

Before that, on the 29th and 30th, there are some surfable-looking numbers (2ft with 48 energy, and 2ft with 123 energy on the 30th), but the winds are cross or cross-on, and it’s not going to be worth the paddle. And for the beginners out there, that 6ft on the 31st is getting up there, and the 6ft on the 1st is pushing it too, but with the wind, it’ll be a washing machine. The 3rd of September at 5ft is manageable for the intermediates if the conditions hold.

So, mark your calendars for that Thursday the 3rd. It’s not a world-class day, but after two weeks of flatness, it’ll feel like a gift. Get amongst it early.

Rusty

Short Range Forecast

Mostly dry. Very mild (max 15°C on Sat morning, min 7°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 18°C on Mon afternoon, min 10°C on Sun night). Wind will be generally light.

Wed
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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)
0.7
SE
5
0.8
ESE
5
0.6
E
9
0.6
E
8
0.5
E
10
0.4
ESE
10
0.4
ESE
9
0.3
ESE
10
0.2
E
8
0.1
NE
14
0.1
NE
14
0.2
E
12
0.2
E
13
0.6
NNW
6
0.3
NNW
6
0.1
E
12
0.1
E
12
0.1
NE
11
0.1
N
14
0.1
E
12
Wave Graph
Metric surfscale
Energy kJ
25
36
55
51
50
31
28
19
6
8
8
12
12
25
6
5
5
4
4
4
Wind (km/h)
10
S
10
S
10
WSW
5
WSW
10
WSW
10
W
15
W
10
WNW
15
W
15
W
20
WNW
20
WNW
20
NW
15
W
10
W
10
W
10
W
10
WNW
15
WNW
15
W
Wind State
cross
cross
cross-off
cross-off
off
off
off
off
off
off
cross-off
cross-off
cross-off
off
off
off
off
off
off
off
High Tide
11:49PM1.68m
12:22PM1.62m
00:36AM1.59m
1:12PM1.56m
1:26AM1.52m
2:05PM1.52m
2:19AM1.47m
3:00PM1.50m
3:14AM1.46m
3:55PM1.51m
4:08AM1.46m
4:48PM1.55m
Low Tide
6:07AM0.28m
6:30PM0.42m
6:53AM0.35m
7:19PM0.49m
7:42AM0.41m
8:11PM0.55m
8:34AM0.45m
9:06PM0.57m
9:28AM0.45m
10:02PM0.56m
10:22AM0.43m
10:57PM0.52m
clear
clear
clear
clear
clear
cloud
cloud
part cloud
part cloud
clear
part cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:52
6:52
6:50
6:48
6:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:44
5:45
5:45
5:46
5:47
5:49
5:49
 mm
Temp °C
13
9
13
14
10
14
14
11
15
15
12
14
14
12
16
18
11
16
17
14
Feels °C
8
5
11
12
7
11
11
8
11
11
8
10
11
9
14
15
9
14
14
11
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  • 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 Onemana Surf forecast

The above surf forecast table for Onemana provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Onemana can be found by selecting the local surf guide option on the grey menu. Our Onemana 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 (Onemana) 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 Onemana 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.

Onemana is 64 km (40 miles) from Tauranga. If you plan a holiday in The Coromandel, look for hotels and other accommodation in Tauranga. Tauranga has rooms for a wide range of budgets as well as car hire and transport links.

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