Onemana Surf Break

Lat Long: 37.15° S 175.88° E

Onemana 48 hour detailed Surf Forecast

Issued: 5 am 17 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.


How big are the waves at Onemana today (17 Aug):

  • Morning surf: Morning surf (17 Aug, local time) - 6.5ft (2.0m), 7s period with ESE swell.
  • Afternoon surf: Afternoon surf (17 Aug, local time) - 4.5ft (1.4m), 9s period with ESE swell.
  • Evening surf: Evening surf (17 Aug, local time) - 3.5ft (1.0m), 10s period with E swell.

The current surf forecast for Onemana at 12PM is: 1.7m 7s primary swell from a East-southeast direction and 0.1m 12s secondary swell from a North direction (forecast issued at 05:00am August 17). The wind direction is predicted to be cross-shore.

Time (NZST) & DateWave HeightWave Period
Morning (17 Aug)6.5ft (2.0m)7s
Afternoon (17 Aug)4.5ft (1.4m)9s
Evening (17 Aug)3.5ft (1.0m)10s

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


Short Range Forecast

Mostly dry. Very mild (max 13°C on Tue afternoon, min 4°C on Mon night). Wind will be generally light.

Monday
17
Tuesday
18
Wednesday
19
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
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
0
0
0
0
1
1
0
0
0
1
1
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SE
6
1.8
SE
7
2
ESE
7
1.7
ESE
7
1.4
ESE
9
1.2
ESE
10
1
E
10
1
E
10
0.9
E
10
0.8
E
10
0.7
E
9
0.6
E
9
0.5
E
9
0.5
E
9
0.4
E
9
0.3
E
9
0.3
E
10
0.3
E
10
0.5
SE
5
0.5
SE
5
0.7
SSE
5
0.2
E
10
0.4
ESE
9
Wave Graph
Metric surfscale
Energy kJ
368
289
353
247
315
282
190
190
151
115
85
62
41
40
25
15
17
18
11
11
19
7
32
Wind (km/h)
35
SSE
30
SSE
30
SSE
25
SSE
10
SSE
15
SW
20
WSW
15
SW
15
SW
15
SW
10
WSW
15
SSW
20
SW
15
SW
20
SW
20
SW
25
SW
15
SSW
10
SSW
15
SSE
5
S
10
WSW
5
WSW
Wind State
cross-on
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
off
cross-off
High Tide
9:59AM1.80m
10:18PM1.86m
10:46AM1.75m
11:03PM1.77m
11:34AM1.69m
Low Tide
3:52AM0.08m
4:09PM0.16m
4:38AM0.13m
4:56PM0.24m
5:22AM0.20m
5:42PM0.33m
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:58
6:56
6:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:43
5:44
5:44
 mm
Temp °C
9
8
9
11
12
10
7
6
5
4
7
12
13
11
9
8
7
7
8
11
12
10
9
Feels °C
1
1
2
4
8
5
2
1
0
0
3
8
8
6
4
3
1
3
4
6
8
7
6
  • 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 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Onemana surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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