Surf Forecasts:
Nine Mile surf forecast from 17 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 3AM (local time) - 3.5ft (1.1m), 16s period, WSW swell with offshore winds.
- Most powerful swell: Monday 24 Aug, 9PM (local time) - 15ft (4.5m), 14s period, W swell with 7,690 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 6AM (local time) - 4ft (1.2m), 10s period with W swell.
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 Tuesday (Aug 18) at 6AM. The primary swell is predicted to be 1.2m and 10s period with a secondary swell of 0.8m and 13s. 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 4.5m 14s and forecast to arrive on Monday (Aug 24) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 4s period and expected on Thursday (Aug 20) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 18th Aug) | 4ft (1.2m) 10s |
| Best Surf | 3AM (Wed 19th Aug) | 3.5ft (1.1m) 16s |
| Most Powerful | 9PM (Mon 24th Aug) | 15ft (4.5m) 14s |
Table - best surf conditions forecast for Nine Mile over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 11°C on Wed morning, min 5°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 35mm), heaviest during Fri night. Very mild (max 13°C on Sat morning, min 8°C on Thu night). Winds increasing (calm on Sat morning, fresh winds from the W by Sat night). | ||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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) | WSW 14 | W 11 | WSW 10 | WSW 10 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 15 | WSW 14 | WSW 14 | W 10 | WNW 10 | WNW 7 | W 10 | W 12 | W 15 |
Wave Graph  | |||||||||||||||||||
 kJ | 336 | 565 | 410 | 335 | 739 | 796 | 845 | 605 | 485 | 390 | 456 | 341 | 213 | 783 | 567 | 456 | 3234 | 4593 | 6290 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-on | off | off | cross-on | off | off | cross-on | off | glassy | on | cross-off | glassy | cross-on | cross-on | on | cross-on | cross-on |
High Tide | 2:07AM2.60m | 2:29PM2.48m | 2:50AM2.40m | 3:14PM2.31m | 3:39AM2.21m | 4:06PM2.17m | 4:38AM2.07m | 5:10PM2.06m | 5:51AM2.00m | 6:25PM2.05m | 7:05AM2.02m | 7:33PM2.11m | |||||||
Low Tide | 8:21AM0.38m | 8:42PM0.48m | 9:04AM0.58m | 9:29PM0.67m | 9:53AM0.76m | 10:25PM0.82m | 10:53AM0.90m | 11:33PM0.92m | 12:04PM0.96m | 00:46AM0.92m | 1:16PM0.92m | 1:52AM0.83m | |||||||
 |  | |  | | | | | | |  | |  |  | |  |  | | | |
 | — | 7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — |
 | — | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 13 | 1 | 4 | 10 | 4 | 3 | 1 |
Temp °C | 5 | 10 | 10 | 10 | 11 | 11 | 9 | 11 | 11 | 9 | 11 | 10 | 11 | 13 | 13 | 13 | 11 | 10 | 11 |
Feels °C | 2 | 8 | 7 | 6 | 9 | 8 | 6 | 10 | 9 | 7 | 9 | 8 | 9 | 10 | 8 | 8 | 3 | 3 | 5 |
Swell 1 Height (m) Direction Period (s) | WSW 14 | W 11 | WSW 10 | WSW 10 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 15 | WSW 14 | WSW 14 | W 10 | WNW 10 | W 12 | — | — | W 15 |
| kJ | 336 | 565 | 410 | 335 | 739 | 796 | 845 | 605 | 485 | 390 | 456 | 341 | 213 | 783 | 567 | 77 | — | — | 6290 |
Swell 2 Height (m) Direction Period (s) | W 8 | WSW 14 | WSW 14 | WSW 13 | W 10 | W 10 | — | N 4 | N 4 | — | — | — | W 20 | WSW 13 | W 13 | WSW 16 | — | — | — |
| kJ | 111 | 152 | 198 | 218 | 231 | 192 | — | 1 | 1 | — | — | — | 7 | 60 | 125 | 87 | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 18 | W 18 | — | WSW 17 | — | — | — | — | — | — | — | — | — | W 20 | WSW 19 | W 20 | — | — | — |
| kJ | 57 | 56 | — | 307 | — | — | — | — | — | — | — | — | — | 30 | 73 | 119 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | NW 4 | — | — | WNW 7 | W 10 | W 12 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 16 | — | — | 456 | 3234 | 4593 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 36 | 0 | 0 | 25 | 0 | 0 | 25 | 0 | 0 | 73 | 51 | 0 | 169 | 203 | 205 | 205 | 186 |
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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