Surf Forecasts:
Kai-Iwi surf forecast from 19 Sep 2026:
- Best quality surf: Monday 21 Sep, 12AM (local time) - 6.5ft (2.0m), 16s period, WSW swell with glassy winds.
- Most powerful swell: Sunday 20 Sep, 6AM (local time) - 13ft (4.0m), 9s period, WSW swell with 2,703 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 12AM (local time) - 6.5ft (2.0m), 16s 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 (Sep 21) at 12AM. The primary swell is predicted to be 2.0m and 16s period with a secondary swell of 1.2m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kai-Iwi in the next 16 days are 4.0m 9s and forecast to arrive on Sunday (Sep 20) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Sep 21) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 21st Sep) | 6.5ft (2.0m) 16s |
| Best Surf | 12AM (Mon 21st Sep) | 6.5ft (2.0m) 16s |
| Most Powerful | 6AM (Sun 20th Sep) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Kai-Iwi over the next 16 days.
Short Range ForecastLight rain (total 5mm), mostly falling on Sat night. Very mild (max 14°C on Sat afternoon, min 6°C on Sun night). Winds decreasing (strong winds from the W on Sat night, calm by Sun night). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Wed morning. Very mild (max 14°C on Fri morning, min 5°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sat 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | ||||||||||||||
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) | W 8 | W 8 | WSW 10 | WSW 11 | WSW 16 | W 10 | W 8 | W 8 | WNW 7 | W 8 | WSW 10 | W 8 | WSW 16 | WSW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | W 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1121 | 871 | 2091 | 1459 | 1982 | 783 | 984 | 784 | 311 | 476 | 556 | 272 | 322 | 733 | 358 | 242 | 171 | 99 | 91 | 153 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | on | cross-on | glassy | cross | cross | cross-off | cross-off | on | cross-off | cross-on | cross | cross | cross-on | cross-on | off | cross-off | cross-on | cross-off |
High Tide | 3:48PM2.21m | 4:33AM2.12m | 5:14PM2.17m | 5:52AM2.12m | 6:32PM2.22m | 7:01AM2.19m | 7:30PM2.32m | 7:56AM2.29m | 8:16PM2.44m | 8:42AM2.41m | 8:55PM2.57m | 9:21AM2.54m | 9:32PM2.69m | |||||||
Low Tide | 10:16PM1.34m | 10:41AM1.32m | 11:38PM1.35m | 12:09PM1.30m | 00:57AM1.27m | 1:19PM1.19m | 1:53AM1.12m | 2:10PM1.04m | 2:35AM0.96m | 2:51PM0.89m | 3:12AM0.81m | 3:28PM0.76m | ||||||||
 |  |  | |  | | |  |  | | | | | |  | | | | | | |
 | — | — | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — |
 | 6:13 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:17 | — | — | 6:19 | — |
mm | — | 2 | 2 | — | — | — | — | — | 1 | — | — | 2 | 1 | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 11 | 12 | 9 | 13 | 13 | 11 | 13 | 11 | 10 | 11 | 9 | 7 | 12 | 12 | 9 | 14 | 14 | 12 |
Feels °C | 8 | 7 | 7 | 7 | 6 | 7 | 6 | 5 | 9 | 6 | 6 | 7 | 3 | 2 | 8 | 8 | 7 | 11 | 11 | 8 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | WSW 10 | WSW 11 | WSW 16 | WSW 16 | SW 16 | WSW 14 | W 7 | W 8 | WSW 10 | W 8 | W 8 | WSW 16 | WSW 10 | WSW 10 | W 8 | W 7 | W 7 | W 8 |
| kJ | 232 | 223 | 2091 | 1459 | 1982 | 447 | 245 | 140 | 214 | 476 | 556 | 272 | 169 | 733 | 173 | 123 | 130 | 70 | 54 | 153 |
Swell 2 Height (m) Direction Period (s) | SSW 15 | SSW 13 | SW 16 | S 8 | S 13 | S 12 | S 10 | SSW 12 | SW 14 | SW 14 | S 8 | WSW 14 | WSW 16 | S 6 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | S 9 |
| kJ | 21 | 18 | 65 | 82 | 475 | 171 | 55 | 45 | 97 | 53 | 82 | 140 | 322 | 76 | 358 | 242 | 171 | 99 | 91 | 15 |
Swell 3 Height (m) Direction Period (s) | — | — | SSW 12 | S 11 | SW 16 | — | — | S 13 | SSW 10 | — | SW 16 | S 15 | S 15 | S 15 | S 8 | SSW 9 | S 9 | SSW 10 | SSW 10 | SW 13 |
| kJ | — | — | 26 | 3 | 367 | — | — | 13 | 20 | — | 67 | 4 | 18 | 17 | 29 | 50 | 43 | 31 | 31 | 28 |
Wind waves Height (m) Direction Period (s) | W 8 | W 8 | — | — | — | W 10 | W 8 | W 8 | WNW 7 | S 6 | — | S 5 | SSW 6 | — | — | — | — | — | — | NNW 2 |
| kJ | 1121 | 871 | — | — | — | 783 | 984 | 784 | 311 | 209 | — | 57 | 62 | — | — | — | — | — | — | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 118 | 160 | 176 | 182 | 273 | 0 | 150 | 156 | 13 | 13 | 225 | 0 | 11 | 61 | 0 | 0 | 158 | 0 | 0 | 150 |
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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