Surf Forecasts:
Kai-Iwi surf forecast from 10 Aug 2026:
- Best quality surf: Thursday 13 Aug, 6PM (local time) - 3.5ft (1.0m), 11s period, W swell with cross-offshore winds.
- Most powerful swell: Monday 17 Aug, 12AM (local time) - 13ft (4.0m), 9s period, S swell with 2,282 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 9PM (local time) - 4.5ft (1.3m), 7s period with W 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 10) at 9PM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.5m and 15s. 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 Monday (Aug 17) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Wednesday (Aug 12) at 3AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 10th Aug) | 4.5ft (1.3m) 7s |
| Best Surf | 6PM (Thu 13th Aug) | 3.5ft (1.0m) 11s |
| Most Powerful | 12AM (Mon 17th Aug) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Kai-Iwi over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 16°C on Wed afternoon, min 8°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 30mm), heaviest during Fri afternoon. Very mild (max 13°C on Thu afternoon, min 10°C on Sat night). Winds increasing (calm on Thu morning, strong winds from the S by Sat night). | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
AM | 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 7 | W 7 | WSW 7 | SW 14 | SW 13 | WSW 18 | SW 17 | WSW 16 | W 11 | W 10 | W 10 | W 11 | W 10 | W 9 | SW 19 | S 7 | WSW 18 | SW 18 | WSW 16 | S 7 | S 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 295 | 229 | 135 | 47 | 44 | 32 | 74 | 25 | 121 | 168 | 218 | 191 | 125 | 81 | 175 | 387 | 578 | 607 | 552 | 474 | 2282 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | glassy | cross | cross-on | cross-off | off | glassy | off | glassy | cross-off | cross-off | cross-off | on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 8:31PM2.66m | 8:55AM2.62m | 9:23PM2.81m | 9:48AM2.73m | 10:12PM2.92m | 10:35AM2.81m | 10:56PM2.97m | 11:18AM2.84m | 11:38PM2.96m | 11:59AM2.82m | 00:18AM2.89m | 12:38PM2.75m | 00:55AM2.77m | ||||||||
Low Tide | 2:14PM0.97m | 2:46AM0.90m | 3:11PM0.81m | 3:38AM0.75m | 4:00PM0.67m | 4:25AM0.64m | 4:45PM0.59m | 5:10AM0.58m | 5:28PM0.57m | 5:53AM0.58m | 6:08PM0.61m | 6:35AM0.64m | 6:48PM0.71m | ||||||||
 | |  |  | |  |  | | |  | | | |  |  | | |  | | |  | |
 | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — |
 | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — |
mm | — | — | — | — | — | — | — | — | — | 4 | 1 | — | 1 | 8 | 8 | 1 | 4 | 3 | 8 | 1 | — |
Temp °C | 14 | 14 | 10 | 12 | 13 | 10 | 15 | 16 | 13 | 11 | 13 | 12 | 13 | 13 | 12 | 13 | 13 | 12 | 10 | 9 | 8 |
Feels °C | 9 | 10 | 9 | 9 | 9 | 7 | 13 | 15 | 11 | 10 | 12 | 11 | 12 | 11 | 10 | 9 | 10 | 9 | 0 | -1 | 0 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | WSW 7 | S 7 | W 6 | S 7 | SW 17 | WSW 13 | W 11 | W 10 | W 10 | W 11 | W 10 | W 9 | SW 19 | SW 18 | WSW 18 | SW 18 | WSW 16 | SW 16 | WSW 15 |
| kJ | 124 | 112 | 135 | 45 | 13 | 17 | 74 | 17 | 121 | 168 | 218 | 191 | 125 | 81 | 175 | 312 | 578 | 607 | 552 | 261 | 158 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 9 | SW 14 | W 6 | SW 13 | WSW 18 | S 7 | WSW 16 | SW 19 | WSW 18 | — | SW 17 | SW 16 | SW 15 | W 8 | W 8 | W 11 | W 9 | SSW 5 | W 8 | W 10 |
| kJ | 7 | 7 | 103 | 20 | 44 | 32 | 4 | 25 | 15 | 31 | — | 77 | 66 | 57 | 35 | 12 | 82 | 59 | 22 | 52 | 17 |
Swell 3 Height (m) Direction Period (s) | — | NW 9 | S 9 | SW 14 | WSW 20 | WSW 13 | W 6 | S 7 | S 9 | S 9 | — | S 16 | SW 19 | SW 18 | S 15 | W 8 | WSW 11 | S 17 | S 16 | — | — |
| kJ | — | 3 | 6 | 47 | 38 | 16 | 1 | 1 | 2 | 2 | — | 5 | 15 | 51 | 4 | 5 | 38 | 6 | 5 | — | — |
Wind waves Height (m) Direction Period (s) | W 7 | W 7 | S 4 | — | S 8 | ESE 3 | — | — | — | — | — | ENE 3 | ESE 3 | SSE 3 | SSW 5 | S 7 | S 7 | S 7 | — | S 7 | S 9 |
| kJ | 295 | 229 | 9 | — | 42 | 2 | — | — | — | — | — | 1 | 1 | 2 | 50 | 387 | 361 | 126 | — | 474 | 2282 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 150 | 131 | 0 | 7 | 39 | 13 | 0 | 39 | 0 | 0 | 0 | 0 | 0 | 23 | 39 | 104 | 61 | 118 | 175 | 202 | 213 |
Best forecast wave conditions in Wanganui and the Manawatu | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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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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