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Kai-Iwi Surf Forecast
/ Wanganui-Manawatu (16 surf breaks) /
Surf Forecasts:
Kai-Iwi surfForecast / Wanganui-Manawatu / New Zealand
12 Day Weather and Surf, issued 11 pm Saturday 13 Sep 2025 NZST
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 Sunday (Sep 14) at 6PM. The primary swell is predicted to be 2.5m and 10s period with a secondary swell of 1.1m and 12s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kai-Iwi in the next 12 days are 4.5m 10s and forecast to arrive on Sunday (Sep 14) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Sunday (Sep 21) at 12AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 14th Sep) | 8ft (2.5m) 10s |
| Best Surf | 3AM (Thu 18th Sep) | 11ft (3.5m) 10s |
| Most Powerful | 3AM (Sun 14th Sep) | 15ft (4.5m) 10s |
Table - best surf conditions forecast for Kai-Iwi over the next 12 days.
Short Range Forecast Light rain (total 4mm), mostly falling on Sat night. Very mild (max 16°C on Tue morning, min 8°C on Sun night). Winds decreasing (strong winds from the W on Sat night, calm by Sun afternoon). | Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Wed night. Very mild (max 19°C on Wed morning, min 11°C on Thu afternoon). Mainly fresh winds. | |||||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | ||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | ||
Rating (10 max) | ||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||
| Period(s) (?) | 11 | 10 | 10 | 9 | 7 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 9 | 11 | 9 | 9 | 13 | 13 | 8 | 8 | 7 | |
Wave (?)Graph  | ||||||||||||||||||||||
 kJ (?) | 5121 | 3397 | 1803 | 579 | 508 | 1198 | 1198 | 970 | 635 | 368 | 266 | 562 | 1428 | 2593 | 2120 | 2166 | 745 | 1387 | 564 | 399 | 149 | |
Wind (km/h) | ||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | on | cross- off | cross | cross | cross | cross | cross | cross- off | cross- off | cross | cross- off | cross | cross | cross | cross- on | cross | cross- off | cross- off | cross | |
High Tide / height (m) | 2:29AM 2.53 | 3:05PM 2.48 | 3:42AM 2.37 | 4:27PM 2.36 | 5:09AM 2.29 | 5:59PM 2.35 | 6:30AM 2.30 | 7:13PM 2.43 | 7:38AM 2.37 | 8:09PM 2.53 | 8:33AM 2.47 | 8:56PM 2.63 | 9:18AM 2.57 | |||||||||
Low Tide / height (m) | 8:49AM 0.98 | 9:30PM 1.10 | 9:55AM 1.15 | 10:48PM 1.21 | 11:22AM 1.23 | 12:15AM 1.21 | 12:49PM 1.19 | 1:29AM 1.12 | 1:55PM 1.07 | 2:24AM 0.99 | 2:46PM 0.93 | 3:09AM 0.86 | 3:28PM 0.81 | |||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | ||||||||||||||||
| Sunrise | - | 6:22 | - | - | 6:22 | - | - | 6:20 | - | - | 6:18 | - | - | 6:16 | - | - | 6:15 | - | - | 6:13 | - | |
| Sunset | - | - | 6:07 | - | - | 6:08 | - | - | 6:09 | - | - | 6:10 | - | - | 6:12 | - | - | 6:13 | - | - | 6:14 | |
 |  |  |  |  | |  | | | | | | | | | | | | |  | | ||
Rain (mm) | 2 | 2 | - | - | - | - | - | - | - | - | - | - | 6 | - | 2 | - | - | - | - | - | - | |
| Temp. °C | 12 | 13 | 11 | 11 | 14 | 14 | 13 | 16 | 16 | 14 | 19 | 18 | 15 | 13 | 13 | 12 | 13 | 13 | 11 | 13 | 15 | |
| Feels °C (?) | 4 | 8 | 7 | 7 | 8 | 7 | 7 | 11 | 11 | 10 | 13 | 12 | 9 | 7 | 7 | 7 | 9 | 8 | 6 | 8 | 11 | |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Wanganui-Manawatu
Still cross-shore at Kai-Iwi (fresh winds from the W at WanganuiAeroAws 11 km from Kai-Iwi). A 3.7m swell from the WSW is too big for here
1 h 13 min ago
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.
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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