Kai-Iwi surfForecast / Wanganui-Manawatu / New Zealand

information circle12 Day Weather and Surf, issued 11 am Wednesday 09 Jul 2025 NZST
Forecast update in hr  min  s Forecast update imminent
Kai-Iwi surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kai-Iwi sea temperature is
13.8° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Kai-Iwi this week:

The surf forecast for Kai-Iwi over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jul 09) at 9PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.1m and 10s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Kai-Iwi in the next 12 days are 3.5m 12s and forecast to arrive on Wednesday (Jul 16) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Saturday (Jul 12) at 3AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Wed 9th Jul)2ft (0.6m) 10s
Best Surf12PM (Wed 16th Jul)11ft (3.5m) 12s
Most Powerful12PM (Wed 16th Jul)11ft (3.5m) 12s

Table - best surf conditions forecast for Kai-Iwi over the next 12 days.

Updates in  hr  min  s Forecast update imminent
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.2
S
0.3
WNW
0.5
WNW
0.4
WNW
0.2
WSW
0.4
SW
0.5
SW
0.5
SW
0.5
SW
0.9
WNW
1.6
WNW
2.5
WNW
2.2
W
2.3
WSW
2.5
WSW
2.1
WSW
1.9
WSW
1.6
WSW
1.2
W
1
W
1.6
WNW
3
W
3
WSW
1.7
WSW
1.1
W
1.3
W
1.7
W
1.6
W
1
W
1
W
0.7
WSW
0.8
WSW
1.5
W
2
W
1.7
W
1.3
WSW
Period(s) (?)121110921191716158911131214141412109813121289776911118101016
Wave
Graph
(?)Metric surfscale
Energy (?)19396537691111711501312535372956160615592840180014641331294169624379625879173093153044542222982292574619579401158
Wind
(km/h)
10
ENE
10
ENE
10
NE
10
NE
5
N
10
NE
15
ENE
25
NE
15
N
25
NNW
25
NW
20
NNW
10
N
15
NNW
10
N
10
NNW
15
WNW
15
NNW
15
N
20
NNW
20
NNW
20
NNW
20
WNW
15
NNW
10
NNW
20
W
15
NNW
20
WNW
20
WNW
15
NW
10
NNW
10
WNW
5
ENE
15
ESE
20
SE
15
ESE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
offoffoffcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crosscross-
off
cross-
off
crosscross-
off
crosscrosscross-
off
cross-
off
crossglasscrosscrosscross
High Tide
/ height (m)
9:22AM
2.44
9:43PM
2.59
10:03AM
2.53
10:20PM
2.68
10:42AM
2.60
10:58PM
2.75
11:20AM
2.66
11:36PM
2.80
11:58AM
2.68
12:14AM
2.83
12:37PM
2.68
12:54AM
2.81
1:19PM
2.66
1:36AM
2.77
2:03PM
2.61
2:20AM
2.70
2:51PM
2.55
3:11AM
2.61
3:45PM
2.48
4:08AM
2.52
4:49PM
2.43
5:17AM
2.45
6:12PM
2.42
Low Tide
/ height (m)
3:33PM
0.97
3:55AM
0.99
4:12PM
0.90
4:32AM
0.93
4:50PM
0.84
5:11AM
0.87
5:28PM
0.80
5:50AM
0.84
6:07PM
0.77
6:32AM
0.81
6:46PM
0.78
7:14AM
0.81
7:29PM
0.82
7:59AM
0.83
8:15PM
0.88
8:45AM
0.87
9:06PM
0.96
9:34AM
0.94
10:02PM
1.05
10:31AM
1.01
11:07PM
1.11
11:41AM
1.07
12:28AM
1.13
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Sunrise7:41--7:39--7:39--7:39--7:39--7:39--7:37--7:37--7:37--7:35--7:35--7:35--
Sunset-5:09--5:09--5:10--5:12--5:12--5:13--5:14--5:14--5:15--5:15--5:16--5:17-
cloudcloudmod rainpart cloudpart cloudrain showerscloudlight rainrain showersclearrain showerspart cloudcloudpart cloudpart cloudclearrain showersclearpart cloudrain showersclearclearclearpart cloudpart cloudclearclearpart cloudpart cloudpart cloudpart cloudrain showerspart cloudclearclearclear
Rain (mm)
--6--1-410-2-----1--4-----------2----
Temp. °C1213111415131615151414121414101413101313111313913131113131013131111138
Feels °C (?)9109121411131212998111171110791078861098886111110683

Short Range Forecast: Heavy rain (total 21mm), heaviest during Fri night. Very mild (max 16°C on Fri morning, min 9°C on Wed night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Sat afternoon. Very mild (max 14°C on Sat morning, min 8°C on Mon night). Wind will be generally light.

Days 6-9 Weather Summary Light rain (total 4mm), mostly falling on Tue afternoon. Very mild (max 13°C on Tue morning, min 9°C on Wed night). Wind will be generally light.

Long Range Forecast: Light rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 13°C on Fri morning, min 7°C on Sun night). Wind will be generally light.

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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 12 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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