Onemana Surf Break

Lat Long: 37.15° S 175.88° E

Onemana 48 hour detailed Surf Forecast

Issued: 11 am 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onemana sea temperature is
14.7° C
0.1° 

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


How big are the waves at Onemana today (11 Aug):

  • Morning surf: Morning surf (11 Aug, local time) - 3.5ft (1.0m), 8s period with N swell.
  • Afternoon surf: Afternoon surf (11 Aug, local time) - 3.5ft (1.0m), 8s period with NNE swell.
  • Evening surf: Evening surf (11 Aug, local time) - 3.5ft (1.0m), 9s period with NNE swell.

The current surf forecast for Onemana at 4PM is: 1.0m 8s primary swell from a North-northeast direction and 0.1m 11s secondary swell from a East direction (forecast issued at 11:00am August 11). The wind direction is predicted to be onshore.

Time (NZST) & DateWave HeightWave Period
Morning (11 Aug)3.5ft (1.0m)8s
Afternoon (11 Aug)3.5ft (1.0m)8s
Evening (11 Aug)3.5ft (1.0m)9s

Table - waves today at Onemana. (Swell directed towards the surf break)


Short Range Forecast

Heavy rain (total 20mm), heaviest during Wed afternoon. Very mild (max 15°C on Thu afternoon, min 10°C on Tue morning). Wind will be generally light.

Tue
11
Wednesday
12
Thursday
13
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
1
1
0
0
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
Height Map
Wave
Height (m)
Direction
Period (s)
1
N
8
1
NNE
8
1
NNE
8
1
NNE
9
1
NNE
9
1
NNE
9
0.9
NNE
9
1.3
ENE
6
1.7
NE
6
1.3
NNE
8
1.3
NNE
8
1.3
NNE
8
1.3
NNE
8
1.4
NNE
8
1.3
NNE
7
1.3
NNE
7
1.6
NE
7
1.6
NE
7
1.6
NE
7
1.6
NE
6
1.4
NE
6
Wave Graph
Metric surfscale
Energy kJ
118
127
144
162
166
162
131
125
205
209
220
226
226
224
193
164
221
207
207
216
149
Wind (km/h)
5
S
5
E
10
ESE
5
E
10
ENE
20
ENE
25
ENE
25
E
25
ENE
25
ENE
20
ENE
20
ENE
20
ENE
20
ENE
15
ENE
15
ENE
15
ENE
20
ENE
20
E
15
ENE
5
NE
Wind State
glassy
glassy
on
on
on
cross-on
cross-on
on
on
on
on
on
cross-on
cross-on
cross-on
on
cross-on
on
on
on
cross-on
High Tide
5:13PM1.84m
5:33AM1.76m
6:11PM1.90m
6:31AM1.80m
7:05PM1.96m
Low Tide
10:51AM0.15m
11:29PM0.26m
11:51AM0.10m
00:29AM0.19m
12:48PM0.06m
cloud
part cloud
clear
cloud
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
cloud
cloud
light rain
light rain
light rain
light rain
rain showers
light rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
7:03
7:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:38
5:39
 mm
1
5
2
1
3
3
2
2
1
Temp °C
10
13
13
10
11
13
13
12
13
14
13
12
13
13
13
13
14
14
14
15
14
Feels °C
9
12
11
8
9
9
9
7
9
10
10
8
9
10
11
11
12
11
11
14
14
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

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