Kai-Iwi Surf Break

Lat Long: 39.90° S 174.92° E

Kai-Iwi 48 hour detailed Surf Forecast

Issued: 5 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kai-Iwi sea temperature is
12.3° C
1.0° 

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


How big are the waves at Kai-Iwi today (18 Aug):

  • Morning surf: Morning surf (18 Aug, local time) - 1.5ft (0.4m), 14s period with SW swell.
  • Afternoon surf: Afternoon surf (18 Aug, local time) - 4.5ft (1.4m), 6s period with SSW swell.
  • Evening surf: Evening surf (18 Aug, local time) - 13ft (4.0m), 9s period with S swell.

The current surf forecast for Kai-Iwi at 11AM is: 1.1m 5s primary swell from a South direction and 0.6m 8s secondary swell from a West direction, 0.4m 14s secondary swell from a Southwest direction (forecast issued at 05:00am August 18). The wind direction is predicted to be onshore.

Time (NZST) & DateWave HeightWave Period
Morning (18 Aug)1.5ft (0.4m)14s
Afternoon (18 Aug)4.5ft (1.4m)6s
Evening (18 Aug)13ft (4.0m)9s

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


Short Range Forecast

Light rain (total 2mm), mostly falling on Tue afternoon. Very mild (max 13°C on Thu afternoon, min 8°C on Tue night). Winds decreasing (strong winds from the S on Tue night, light winds from the NW by Wed night).

Tuesday
18
Wednesday
19
Thursday
20
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
1
1
1
1
1
2
2
2
0
0
1
1
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)
0.5
SW
14
0.5
SW
14
0.4
SW
14
1.2
S
5
1.4
SSW
6
0.9
WSW
13
4
S
9
4.5
S
10
4
S
10
3
S
9
2.3
S
10
1.8
S
9
1.4
S
11
1.2
S
14
1
S
14
0.8
WSW
15
0.7
WSW
15
0.7
WSW
15
0.8
WSW
14
0.5
SW
14
0.5
SW
14
0.5
SW
14
0.4
WSW
14
Wave Graph
Metric surfscale
Energy kJ
100
99
50
77
139
235
2695
3623
2755
1487
972
556
483
585
400
290
196
188
239
102
102
100
79
Wind (km/h)
10
S
10
S
25
S
20
SSW
10
SSW
30
S
40
S
40
S
35
S
25
SSE
15
SSE
15
SSE
15
S
10
S
10
S
10
SW
5
NW
10
NNW
10
NNW
10
WNW
15
W
15
WNW
10
NW
Wind State
cross-on
cross-on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-off
cross-off
cross-off
cross
cross
cross-off
cross-off
High Tide
1:32AM2.63m
1:54PM2.53m
2:10AM2.48m
2:35PM2.41m
2:55AM2.34m
3:25PM2.29m
Low Tide
7:53AM0.85m
8:10PM0.99m
8:32AM0.98m
8:55PM1.14m
9:15AM1.12m
part cloud
cloud
cloud
clear
clear
light rain
clear
cloud
cloud
part cloud
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
part cloud
part cloud
cloud
rain showers
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
7:03
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:43
5:44
5:45
 mm
1
1
Temp °C
8
8
10
11
11
9
9
9
8
8
8
10
10
10
10
10
10
9
10
12
13
12
12
Feels °C
4
4
4
6
7
2
0
-1
-1
2
3
6
6
7
7
7
8
7
8
9
10
9
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 Kai-Iwi 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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