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Kai-Iwi Surf Forecast
/ Wanganui-Manawatu (16 surf breaks) /
Surf Forecasts:
Kai-Iwi surfForecast / Wanganui-Manawatu / New Zealand
48hr Weather and Surf, issued 11 am Monday 18 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)How big are the waves at Kai-Iwi today?
The current surf forecast for Kai-Iwi at 6PM is: 0.4m 13s primary swell from a Southwest direction and 0.2m 8s secondary swell from a South direction, 0.3m 3s secondary swell from a South-southeast direction (forecast issued at 11:00am May 18). The wind direction is predicted to be cross-shore.
| Time (NZST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 1.5ft (0.4m) | 14s |
| Afternoon (18 May) | 1.5ft (0.4m) | 14s |
| Evening (18 May) | 1ft (0.3m) | 13s |
Table - waves today at Kai-Iwi. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 15°C on Mon afternoon, min 8°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | |
52 | 51 | 48 | 45 | 31 | 48 | 43 | 65 | 64 | 62 | 54 | 54 | 53 | 52 | 52 | 51 | 46 | 45 | 45 | 45 | 28 | 27 | 26 | 26 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross | cross-on | cross | cross-off | cross-off | off | off | glassy | glassy | glassy | glassy | glassy | off | off | cross-off | off | cross-off | cross-on | cross | off | off | off | off | |
High Tide | 11:07AM2.83m | 11:33PM2.92m | 11:57AM2.78m | 00:23AM2.87m | 12:50PM2.69m | 1:17AM2.77m | ||||||||||||||||||
Low Tide | 5:22PM0.57m | 5:50AM0.64m | 6:12PM0.65m | 6:43AM0.73m | 7:03PM0.76m | |||||||||||||||||||
 | | |  | | | | | | | | | | | | | | | | | | | | | |
 | 7:20 | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — | — | 7:22 | — | — | — | — | — | — | — | 7:22 |
 | — | — | 5:12 | — | — | — | — | — | — | — | 5:10 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | 5:09 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 8 | 12 | 15 | 13 | 12 | 11 | 9 | 9 | 10 | 14 | 14 | 11 | 10 | 10 | 9 | 8 | 10 | 14 | 15 | 12 | 11 | 11 | 10 | 11 |
5 | 10 | 12 | 10 | 10 | 9 | 7 | 7 | 8 | 13 | 13 | 10 | 9 | 8 | 7 | 6 | 8 | 12 | 13 | 11 | 9 | 9 | 7 | 8 | |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | WSW 4 | WSW 4 | SW 13 | SW 13 | SW 13 |
 kJ | 52 | 51 | 48 | 45 | 27 | 48 | 43 | 65 | 64 | 62 | 54 | 54 | 53 | 52 | 52 | 51 | 46 | 45 | 45 | 6 | 6 | 27 | 26 | 26 |
Swell 2 Height (m) Direction Period (s) | SSE 9 | S 9 | S 9 | S 8 | WSW 18 | WSW 13 | WSW 13 | S 10 | S 10 | S 9 | S 9 | S 9 | S 9 | S 8 | S 8 | — | S 8 | WSW 4 | S 7 | SW 13 | SW 13 | — | W 20 | SW 5 |
| kJ | 16 | 6 | 6 | 5 | 31 | 17 | 17 | 8 | 7 | 7 | 6 | 2 | 2 | 1 | 1 | — | 1 | 3 | 1 | 45 | 28 | — | 8 | 1 |
Swell 3 Height (m) Direction Period (s) | S 14 | — | SW 19 | SW 19 | S 3 | S 8 | S 8 | — | — | — | — | — | — | — | — | S 8 | S 8 | S 8 | W 20 | S 7 | — | — | — | W 19 |
| kJ | 4 | — | 15 | 14 | 1 | 5 | 5 | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 7 | 1 | — | — | — | 7 |
Wind waves Height (m) Direction Period (s) | ESE 3 | — | SSE 2 | SSE 3 | ESE 2 | SSE 2 | — | — | — | — | — | — | — | — | — | — | WNW 4 | — | WSW 4 | W 4 | — | W 4 | WNW 4 | NW 3 |
| kJ | 1 | — | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | 2 | — | 6 | 9 | — | 9 | 10 | 7 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 18 | 39 | 103 | 20 | 18 | 0 | 18 | 0 | 0 | 0 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 103 | 120 | 91 | 18 | 39 | 39 | 91 |
Best forecast wave conditions in Wanganui and the Manawatu | ||||||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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