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Nine Mile Surf Forecast
/ West Coast South Island (21 surf breaks) /
Surf Forecasts:
Nine Mile surfForecast / West Coast South Island / New Zealand
16 Day Weather and Surf, issued 5 am Monday 18 May 2026 NZSTForecast update in hr min s Forecast update imminent
Nine Mile surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Nine Mile sea temperature is
15.0° C
(Which is slightly warmer than usual)Best Forecast Surf Conditions for Nine Mile this week:
The surf forecast for Nine Mile over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (May 18) at 9PM. The primary swell is predicted to be 0.9m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Nine Mile in the next 16 days are 2.2m 12s and forecast to arrive on Friday (May 22) at 12AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Thursday (May 21) at 3AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 18th May) | 3ft (0.9m) 16s |
| Best Surf | 9PM (Thu 21st May) | 7ft (2.1m) 12s |
| Most Powerful | 12AM (Fri 22nd May) | 7ft (2.2m) 12s |
Table - best surf conditions forecast for Nine Mile over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 12°C on Wed night, min 6°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Thu afternoon. Very mild (max 15°C on Thu afternoon, min 12°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
WSW 13 | W 18 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | W 13 | W 13 | W 12 | NW 7 | NW 8 | NW 12 | NW 10 | NW 9 | NW 9 | NNW 9 | NNW 10 | NNW 11 | WSW 16 | WSW 15 | WSW 14 | |
181 | 225 | 421 | 346 | 341 | 239 | 171 | 166 | 143 | 136 | 341 | 1269 | 742 | 427 | 309 | 228 | 296 | 275 | 679 | 678 | 425 | |
Wind (km/h) | |||||||||||||||||||||
cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | off | glassy | off | cross-off | cross-off | off | off | glassy | off | glassy | glassy | cross-off | cross-off | cross | off | |
High Tide | 11:38AM2.93m | 11:59PM2.95m | 12:30PM2.86m | 00:51AM2.89m | 1:24PM2.73m | 1:46AM2.78m | 2:22PM2.58m | 2:46AM2.65m | 3:24PM2.45m | 3:49AM2.52m | 4:29PM2.34m | 4:55AM2.43m | 5:35PM2.30m | ||||||||
Low Tide | 5:49PM0.06m | 6:17AM-0.02m | 6:40PM0.14m | 7:11AM0.06m | 7:34PM0.26m | 8:08AM0.19m | 8:31PM0.38m | 9:08AM0.32m | 9:32PM0.49m | 10:12AM0.43m | 10:36PM0.57m | 11:16AM0.50m | 11:41PM0.61m | ||||||||
 | |  | | | | |  |  | |  | | | | | | | | | |  | |
 | 7:41 | — | — | 7:41 | — | — | 7:43 | — | — | 7:43 | — | — | 7:45 | — | — | 7:46 | — | — | 7:47 | — | — |
 | — | 5:20 | — | — | 5:20 | — | — | 5:19 | — | — | 5:17 | — | — | 5:16 | — | — | 5:15 | — | — | 5:15 | — |
— | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 9 | 10 | 8 | 9 | 10 | 7 | 9 | 10 | 12 | 14 | 15 | 14 | 14 | 15 | 13 | 15 | 14 | 13 | 14 | 14 | 13 |
7 | 8 | 6 | 7 | 7 | 5 | 8 | 8 | 9 | 12 | 13 | 13 | 13 | 14 | 12 | 15 | 13 | 12 | 13 | 13 | 12 | |
Swell 1 Height (m) Direction Period (s) | WSW 13 | W 13 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | W 13 | W 13 | W 12 | NW 7 | NW 8 | NW 12 | NW 10 | NW 9 | NW 9 | NNW 9 | NNW 10 | NNW 11 | WSW 16 | WSW 15 | WSW 14 |
 kJ | 181 | 168 | 421 | 346 | 341 | 239 | 171 | 166 | 143 | 136 | 341 | 1269 | 742 | 427 | 309 | 228 | 296 | 275 | 679 | 678 | 425 |
Swell 2 Height (m) Direction Period (s) | W 19 | W 18 | — | — | — | — | W 20 | W 20 | W 19 | W 12 | WNW 15 | WSW 11 | W 11 | W 10 | WSW 12 | WSW 13 | WSW 12 | WSW 12 | NNW 10 | NNW 9 | NNW 8 |
| kJ | 66 | 225 | — | — | — | — | 7 | 8 | 7 | 72 | 121 | 12 | 84 | 89 | 195 | 222 | 192 | 202 | 163 | 137 | 55 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | WNW 9 | WSW 11 | WSW 16 | WSW 16 | WSW 15 | W 8 | W 7 | WNW 6 | W 19 | — | — | NNW 12 |
| kJ | — | — | — | — | — | — | — | — | — | 16 | 25 | 26 | 52 | 44 | 1 | 8 | 7 | 27 | — | — | 14 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | E 3 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 36 | 0 | 0 | 36 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 25 | 0 |
Best forecast wave conditions in West Coast South Island | |||||||||||||||||||||
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 Nine Mile 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 Nine Mile Surf forecast
The above surf forecast table for Nine Mile provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nine Mile can be found by selecting the local surf guide option on the grey menu. Our Nine Mile 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 (Nine Mile) 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 Nine Mile 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.
Nine Mile is 177 km (110 miles) from the city of Christchurch. If you plan a holiday in West Coast South Island, look for hotels and other accommodation in Christchurch. Christchurch has rooms for a wide range of budgets as well as car hire and transport links.
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