Surf Forecasts:
Kai-Iwi surf forecast from 28 Aug 2026:
- Best quality surf: Monday 31 Aug, 6AM (local time) - 11ft (3.5m), 10s period, WSW swell with cross-onshore winds.
- Most powerful swell: Tuesday 1 Sep, 6AM (local time) - 13ft (4.0m), 10s period, WSW swell with 3,069 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 6AM (local time) - 11ft (3.5m), 10s period with WSW 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 Monday (Aug 31) at 6AM. The primary swell is predicted to be 3.5m and 10s period with a secondary swell of 0.2m and 15s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Kai-Iwi in the next 16 days are 4.0m 10s and forecast to arrive on Tuesday (Sep 01) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 31st Aug) | 11ft (3.5m) 10s |
| Best Surf | 6AM (Mon 31st Aug) | 11ft (3.5m) 10s |
| Most Powerful | 6AM (Tue 1st Sep) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Kai-Iwi over the next 16 days.
Short Range ForecastLight rain (total 3mm), mostly falling on Fri night. Very mild (max 16°C on Fri afternoon, min 11°C on Sat morning). Winds increasing (light winds from the WNW on Fri night, fresh winds from the W by Sun afternoon). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Mon night. Very mild (max 16°C on Thu morning, min 8°C on Tue morning). Winds decreasing (strong winds from the WNW on Mon night, calm by Tue afternoon). | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | WNW 10 | WNW 10 | W 6 | W 7 | W 8 | W 8 | W 8 | WSW 9 | WSW 10 | W 9 | W 9 | WSW 10 | WSW 11 | WSW 13 | W 8 | W 8 | W 7 | W 7 | W 7 | WNW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1346 | 574 | 175 | 263 | 636 | 878 | 1383 | 1652 | 1930 | 2549 | 2584 | 3052 | 1433 | 1057 | 690 | 893 | 388 | 389 | 465 | 542 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross | on | cross-on | cross-off | cross | cross | cross-off | cross-off | cross | cross-off |
High Tide | 10:39PM2.80m | 11:01AM2.73m | 11:13PM2.85m | 11:34AM2.77m | 11:46PM2.86m | 12:08PM2.78m | 00:21AM2.84m | 12:43PM2.75m | 00:57AM2.76m | 1:22PM2.68m | 1:39AM2.65m | 2:07PM2.57m | 2:29AM2.52m | |||||||
Low Tide | 4:34PM0.71m | 4:53AM0.69m | 5:07PM0.65m | 5:27AM0.64m | 5:41PM0.64m | 6:03AM0.63m | 6:18PM0.68m | 6:40AM0.67m | 6:56PM0.76m | 7:19AM0.76m | 7:39PM0.88m | 8:02AM0.88m | 8:30PM1.01m | |||||||
 |  | |  |  |  | |  | | | |  | | | | |  | | | | |
 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — |
 | 5:52 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — |
mm | — | 2 | — | — | — | — | — | 1 | — | — | 1 | 2 | — | — | — | — | — | — | — | — |
Temp °C | 16 | 14 | 11 | 12 | 12 | 14 | 14 | 12 | 13 | 12 | 12 | 9 | 10 | 11 | 12 | 13 | 12 | 16 | 16 | 14 |
Feels °C | 10 | 9 | 7 | 7 | 7 | 7 | 7 | 5 | 5 | 4 | 4 | 4 | 6 | 6 | 6 | 6 | 6 | 11 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | WNW 11 | S 12 | S 11 | WSW 12 | SW 19 | SW 18 | S 13 | SW 16 | WSW 10 | S 10 | S 12 | S 13 | WSW 11 | WSW 13 | WSW 14 | SW 14 | S 12 | SSW 12 | SW 14 | W 8 |
| kJ | 749 | 11 | 10 | 15 | 95 | 80 | 3 | 66 | 1930 | 104 | 104 | 84 | 1433 | 1057 | 246 | 160 | 106 | 48 | 53 | 378 |
Swell 2 Height (m) Direction Period (s) | S 12 | W 22 | WSW 13 | S 11 | S 10 | S 9 | — | — | SSW 13 | — | — | — | S 13 | S 11 | S 12 | S 12 | WSW 15 | SW 15 | SSW 12 | SW 15 |
| kJ | 26 | 10 | 17 | 9 | 8 | 7 | — | — | 33 | — | — | — | 490 | 313 | 177 | 104 | 144 | 57 | 26 | 104 |
Swell 3 Height (m) Direction Period (s) | — | W 23 | SW 22 | WSW 21 | SW 12 | W 14 | — | — | — | — | — | — | — | WSW 14 | — | S 15 | SW 15 | SW 15 | — | S 11 |
| kJ | — | 10 | 18 | 43 | 6 | 4 | — | — | — | — | — | — | — | 189 | — | 40 | 57 | 36 | — | 21 |
Wind waves Height (m) Direction Period (s) | WNW 10 | WNW 10 | W 6 | W 7 | W 8 | W 8 | W 8 | WSW 9 | W 10 | W 9 | W 9 | WSW 10 | S 6 | — | W 8 | W 8 | W 7 | W 7 | W 7 | WNW 7 |
| kJ | 1346 | 574 | 175 | 263 | 636 | 878 | 1383 | 1652 | 1631 | 2549 | 2584 | 3052 | 92 | — | 690 | 893 | 388 | 389 | 465 | 542 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 150 | 150 | 122 | 156 | 150 | 155 | 155 | 160 | 131 | 155 | 225 | 353 | 39 | 0 | 160 | 160 | 177 | 13 | 157 | 13 |
Best forecast wave conditions in Wanganui and the Manawatu | ||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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 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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