Onemana Surf Break

Lat Long: 37.15° S 175.88° E

Onemana 48 hour detailed Surf Forecast

Issued: 5 am 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Onemana sea temperature is
14.9° C
0.3° 

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 (21 Jul):

  • Morning surf: Morning surf (21 Jul, local time) - 2.5ft (0.8m), 5s period with E swell.
  • Afternoon surf: Afternoon surf (21 Jul, local time) - 2ft (0.6m), 5s period with E swell.
  • Evening surf: Evening surf (21 Jul, local time) - 1.5ft (0.5m), 5s period with E swell.

The current surf forecast for Onemana at 12PM is: 0.7m 5s primary swell from a East direction and 0.2m 11s secondary swell from a East-southeast direction, 0.3m 4s secondary swell from a South-southeast direction (forecast issued at 05:00am July 21). The wind direction is predicted to be cross-shore.

Time (NZST) & DateWave HeightWave Period
Morning (21 Jul)2.5ft (0.8m)5s
Afternoon (21 Jul)2ft (0.6m)5s
Evening (21 Jul)1.5ft (0.5m)5s

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 8°C on Tue night). Wind will be generally light.

Tuesday
21
Wednesday
22
Thursday
23
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
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
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
ENE
5
0.9
E
5
0.8
E
5
0.7
E
5
0.6
E
5
0.5
E
5
0.5
E
5
0.2
ESE
11
0.2
E
11
0.2
E
11
0.2
E
11
0.2
E
11
0.2
E
10
0.2
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.2
E
6
0.2
ENE
6
0.3
ENE
6
0.3
E
7
0.4
ENE
7
0.4
ENE
7
Wave Graph
Metric surfscale
Energy kJ
47
40
31
24
17
12
12
12
9
9
9
9
8
8
2
2
2
3
3
8
8
15
15
Wind (km/h)
15
SE
10
SSE
5
SSE
5
SSE
5
ESE
5
WSW
10
WSW
10
WSW
10
WSW
5
SW
5
W
5
WSW
10
WSW
10
SW
10
WSW
10
SW
10
S
10
SSE
10
SSE
5
S
5
SE
0
NNW
5
WNW
Wind State
cross-on
cross
cross
cross
glassy
glassy
off
cross-off
cross-off
cross-off
off
off
cross-off
cross-off
cross-off
cross-off
cross
cross-on
cross
cross
glassy
glassy
cross-off
High Tide
12:09PM1.68m
00:27AM1.72m
1:01PM1.62m
1:16AM1.63m
1:54PM1.57m
Low Tide
5:59AM0.18m
6:16PM0.30m
6:47AM0.25m
7:06PM0.40m
7:35AM0.32m
7:57PM0.47m
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:24
7:22
7:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:21
5:22
5:22
 mm
Temp °C
10
10
10
12
13
10
9
9
8
9
10
13
13
11
11
10
10
10
11
12
13
11
11
Feels °C
7
7
9
10
12
9
7
7
5
7
8
11
11
9
9
8
8
8
9
10
12
10
9
  • 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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