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Kai-Iwi Surf Forecast
/ Wanganui-Manawatu (16 surf breaks) /
Surf Forecasts:
Kai-Iwi surfForecast / Wanganui-Manawatu / New Zealand
16 Day Weather and Surf, issued 5 am Sunday 17 May 2026 NZSTForecast 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
15.3° 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 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (May 18) at 12AM. The primary swell is predicted to be 0.5m and 15s period with a secondary swell of 0.2m and 10s. Another secondary swell of 0.5m and 3s 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 0.5m 16s and forecast to arrive on Sunday (May 17) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Saturday (May 23) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 18th May) | 1.5ft (0.5m) 15s |
| Best Surf | 12AM (Mon 18th May) | 1.5ft (0.5m) 15s |
| Most Powerful | 12PM (Sun 17th May) | 1.5ft (0.5m) 16s |
Table - best surf conditions forecast for Kai-Iwi over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 14°C on Sun afternoon, min 8°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Thu afternoon, min 9°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 18 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | WSW 12 | WSW 11 | WSW 15 | WSW 13 | W 11 | W 10 | W 12 | WNW 11 | |
147 | 125 | 115 | 52 | 48 | 48 | 64 | 54 | 52 | 46 | 45 | 43 | 24 | 14 | 13 | 22 | 17 | 21 | 17 | 46 | 23 | |
Wind (km/h) | |||||||||||||||||||||
cross-off | cross | cross-off | cross-off | cross-on | glassy | glassy | on | off | off | cross | cross-off | off | cross-on | off | off | glassy | off | off | glassy | off | |
High Tide | 10:17AM2.82m | 10:46PM2.91m | 11:07AM2.83m | 11:33PM2.92m | 11:57AM2.78m | 00:23AM2.87m | 12:50PM2.69m | 1:17AM2.77m | 1:49PM2.58m | 2:16AM2.65m | 2:52PM2.47m | 3:20AM2.54m | 3:55PM2.38m | ||||||||
Low Tide | 4:34PM0.53m | 5:00AM0.59m | 5:22PM0.57m | 5:50AM0.64m | 6:12PM0.65m | 6:43AM0.73m | 7:03PM0.76m | 7:40AM0.84m | 7:59PM0.89m | 8:40AM0.95m | 8:58PM1.01m | 9:42AM1.02m | 10:02PM1.09m | ||||||||
 | |  | | | | | | | | | | | | | | |  |  | | | |
 | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — | 7:24 | — | — |
 | — | 5:13 | — | — | 5:12 | — | — | 5:10 | — | — | 5:09 | — | — | 5:09 | — | — | 5:08 | — | — | 5:07 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 13 | 14 | 9 | 12 | 14 | 11 | 13 | 14 | 10 | 13 | 14 | 11 | 16 | 17 | 12 | 15 | 16 | 12 | 15 | 17 | 14 |
9 | 10 | 5 | 10 | 12 | 10 | 12 | 12 | 8 | 11 | 11 | 8 | 14 | 15 | 11 | 14 | 15 | 10 | 12 | 15 | 12 | |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 18 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | W 5 | W 4 | WSW 4 | W 4 | WSW 15 | WSW 13 | W 11 | W 10 | W 12 | WNW 11 |
 kJ | 147 | 125 | 115 | 52 | 48 | 48 | 64 | 54 | 52 | 46 | 45 | 11 | 9 | 3 | 3 | 22 | 17 | 21 | 17 | 46 | 23 |
Swell 2 Height (m) Direction Period (s) | SSW 5 | S 10 | S 10 | S 9 | S 9 | WSW 13 | S 10 | S 9 | S 8 | W 4 | S 7 | SW 13 | SW 12 | WSW 12 | WSW 11 | W 3 | W 8 | WNW 8 | W 13 | WSW 15 | WSW 13 |
| kJ | 7 | 18 | 7 | 6 | 6 | 17 | 7 | 6 | 1 | 1 | 1 | 43 | 24 | 14 | 13 | 1 | 6 | 6 | 14 | 21 | 17 |
Swell 3 Height (m) Direction Period (s) | S 10 | WSW 12 | S 16 | — | SW 19 | S 8 | — | — | — | S 8 | W 20 | — | W 19 | NW 5 | SW 18 | SW 11 | SW 11 | SW 14 | S 12 | S 11 | S 9 |
| kJ | 19 | 14 | 5 | — | 15 | 5 | — | — | — | 1 | 7 | — | 7 | 1 | 12 | 5 | 5 | 8 | 11 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | ESE 3 | SSE 3 | SE 3 | ESE 3 | — | — | — | — | — | — | WSW 4 | W 5 | NNW 3 | — | — | — | — | — | — | — | — |
| kJ | 4 | 7 | 5 | 1 | — | — | — | — | — | — | 5 | 22 | 4 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 122 | 0 | 18 | 96 | 0 | 0 | 123 | 18 | 18 | 103 | 0 | 39 | 120 | 91 | 91 | 91 | 91 | 18 | 0 | 18 |
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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