Kai-Iwi Surf Break

Lat Long: 39.90° S 174.92° E

Issued: 5 pm 02 Jul 2026 (local time)

Forecast update in  hr  min

Today's Kai-Iwi sea temperature is
13.9° C

Normal for this time of year

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


Kai-Iwi surf forecast from 2 Jul 2026:

  • Best quality surf: Tuesday 7 Jul, 9PM (local time) - 15ft (4.5m), 9s period, S swell with cross-offshore winds.
  • Most powerful swell: Tuesday 7 Jul, 9AM (local time) - 15ft (4.5m), 10s period, S swell with 4,190 kJ wave energy.
  • Next surfable swell (1★+): Friday 3 Jul, 3PM (local time) - 3ft (0.9m), 5s period with WNW swell.

Best Forecast Surf Conditions for Kai-Iwi this week:

The surf forecast for Kai-Iwi over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Jul 03) at 3PM. The primary swell is predicted to be 0.9m and 5s period with a secondary swell of 0.6m and 5s. Another secondary swell of 0.2m and 11s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Kai-Iwi in the next 16 days are 4.5m 10s and forecast to arrive on Tuesday (Jul 07) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Jul 04) at 9PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Fri 3rd Jul)3ft (0.9m) 5s
Best Surf 9PM (Tue 7th Jul)15ft (4.5m) 9s
Most Powerful 9AM (Tue 7th Jul)15ft (4.5m) 10s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 2mm), mostly falling on Sat night. Very mild (max 14°C on Fri afternoon, min 6°C on Fri night). Winds increasing (light winds from the N on Thu night, fresh winds from the N by Sat night).

Days 5-7 Weather Summary

Heavy rain (total 35mm), heaviest during Mon night. Very mild (max 12°C on Wed morning, min 9°C on Sun night). Winds increasing (light winds from the NNE on Sun afternoon, strong winds from the SSE by Mon night).

Thu
2
Friday
3
Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
0
0
1
1
1
1
2
3
2
0
1
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)
0.2
S
10
0.5
W
4
0.6
W
5
0.9
WNW
5
1.2
WNW
6
0.9
WNW
7
1.3
W
11
2
W
11
2.1
WNW
10
1.6
W
10
1.8
WSW
11
3
S
9
3
S
9
3.5
S
10
4.5
S
10
4
S
10
4.5
S
9
3.5
S
9
3.5
S
9
2.3
S
8
1.5
S
7
Wave Graph
Metric surfscale
Energy kJ
7
7
15
37
110
89
408
934
868
474
786
1628
1500
2284
4190
3067
3310
1780
1780
669
223
Wind (km/h)
10
W
10
NNE
10
N
10
NNW
10
N
10
NNE
20
N
20
N
15
NNW
5
NNE
25
ESE
25
ESE
35
SE
40
SSE
45
S
45
S
15
SE
30
SSE
30
SSE
35
SSE
30
SSE
Wind State
cross
off
off
cross-off
off
off
cross-off
cross-off
cross-off
off
cross
cross
cross
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
High Tide
00:01AM2.73m
12:23PM2.60m
00:38AM2.71m
1:01PM2.57m
1:16AM2.68m
1:40PM2.52m
1:55AM2.62m
2:23PM2.47m
2:39AM2.56m
3:10PM2.43m
3:27AM2.50m
4:01PM2.39m
4:22AM2.46m
Low Tide
5:55PM0.88m
6:17AM0.93m
6:31PM0.89m
6:56AM0.94m
7:09PM0.92m
7:37AM0.95m
7:50PM0.96m
8:19AM0.96m
8:34PM1.02m
9:03AM0.98m
9:23PM1.07m
9:51AM1.01m
10:17PM1.11m
10:45AM1.04m
clear
clear
clear
clear
clear
clear
part cloud
rain showers
rain showers
part cloud
cloud
mod rain
light rain
heavy rain
light rain
cloud
rain showers
light rain
mod rain
mod rain
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:41
7:41
7:41
7:41
7:41
7:41
7:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:06
5:06
5:07
5:07
5:07
5:07
5:08
5:09
 mm
1
1
9
3
18
2
2
1
7
6
Temp °C
11
8
11
14
9
13
14
12
12
11
9
10
10
10
9
10
11
12
12
11
10
Feels °C
8
5
7
11
5
8
9
5
9
9
6
4
2
2
0
5
6
8
7
4
4
Swell 1
Height (m)
Direction
Period (s)
0.2
WSW
7
0.5
W
4
0.6
W
5
0.6
W
5
0.8
WNW
6
0.9
WNW
7
1.3
W
11
2
W
11
1.6
W
10
1.6
W
10
1.8
WSW
11
3
S
9
2.5
S
9
0.9
WSW
16
0.6
W
16
2.5
SSW
9
0.3
WSW
14
0.3
W
14
0.1
SW
19
0.4
SW
18
1.5
S
7
Energy kJ
5
7
15
17
50
89
408
934
509
474
786
1275
1137
452
179
1143
40
34
14
78
223
Swell 2
Height (m)
Direction
Period (s)
0.2
S
10
0.1
S
9
0.2
WSW
12
0.2
WSW
11
0.3
WSW
10
0.5
WSW
12
0.1
W
22
0.2
WSW
20
0.4
SW
18
0.4
SW
16
1.2
WSW
13
1.2
WSW
16
0.5
SW
17
0.2
WSW
18
0.5
SW
16
Energy kJ
7
1
15
12
18
86
9
37
80
68
491
649
135
30
127
Swell 3
Height (m)
Direction
Period (s)
0.1
SW
13
0.1
SW
13
0.1
S
8
0.1
W
16
0.1
SW
15
0.4
SW
12
0.1
S
19
0.1
SW
22
Energy kJ
6
7
1
5
8
39
7
18
Wind waves
Height (m)
Direction
Period (s)
0.4
NNW
3
0.2
N
3
0.9
WNW
5
1.2
WNW
6
0.4
N
3
0.6
NNW
4
0.7
N
4
2.1
WNW
10
0.6
S
3
3
S
9
3
S
9
3.5
S
10
4.5
S
10
4
S
10
4.5
S
9
3.5
S
9
3.5
S
9
2.3
S
8
Energy kJ
3
1
37
110
2
11
15
868
8
1628
1500
2284
4190
3067
3310
1780
1780
669
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
2
3
4
2
5
1
5
4
3
6
3
1
3
3
4
Distance (km)
103
91
61
0
0
0
13
13
13
0
124
175
118
118
140
156
11
140
176
213
213
Best forecast wave conditions in Wanganui and the Manawatu
Rating
(10 max)
1
1
1
1
2
3
4
3
3
Best forecast wave conditions in New Zealand
Rating
(10 max)
3
3
3
3
4
3
3
4
4
4
5
9
7
5
4
6
4
4
3
3
4
Header Global
Rating
(10 max)
7
5
8
5
5
5
7
5
5
9
7
9
8
9
9
6
7
7
9
7
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
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Information about the Kai-Iwi Surf forecast

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

Are you planning a holiday in Wanganui and the Manawatu? If you are looking for accommodation near Kai-Iwi, camping, hotels and holiday cottages in Wanganui and the Manawatu, consider staying in Wanganui which is 12 km (7 miles) away. Other places in and around Wanganui and the Manawatu where you can find information about places to rent, and car hire include Palmerston North which is 78 km (48 miles) away and Levin, 87 km (54 miles) away.

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