Nine Mile surf break

Nine Mile surfForecast / West Coast South Island / New Zealand

information circle12 Day Weather and Surf, issued 12 am Tuesday 16 Dec 2025 NZDT
Forecast 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
17.6° C
(Which is 2.1°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Nine Mile this week:

The surf forecast for Nine Mile over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Dec 16) at 7AM. The primary swell is predicted to be 2.5m and 10s period with a secondary swell of 0.5m and 13s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Nine Mile in the next 12 days are 3.5m 16s and forecast to arrive on Tuesday (Dec 16) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 12s period and expected on Friday (Dec 19) at 4AM.

Wave TypeTime (NZDT) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Tue 16th Dec)8ft (2.5m) 10s
Best Surf 7AM (Wed 17th Dec)10ft (3.0m) 15s
Most Powerful10PM (Tue 16th Dec)11ft (3.5m) 16s

Table - best surf conditions forecast for Nine Mile over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Heavy rain (total 53mm), heaviest during Mon night. Very mild (max 17°C on Mon night, min 10°C on Tue night). Mainly fresh winds.

Days 3-6 Weather Summary Heavy rain (total 42mm), heaviest during Fri afternoon. Very mild (max 15°C on Thu night, min 11°C on Fri night). Winds increasing (light winds from the W on Thu night, fresh winds from the WSW by Fri afternoon).

Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Mon
22
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
1
2
2
3
5
2
4
4
1
0
0
0
0
0
0
0
1
0
2
1
1
Swell
Height Map
Wave Height (m) & direction (?)
3.5
NW
1.9
WNW
2.3
W
3.5
W
3
W
2.5
W
1.5
W
1.8
W
1.1
W
1.4
W
1.4
W
0.9
WSW
1.9
W
2.3
W
2.3
W
2.1
W
2
W
1.7
W
1.1
W
0.8
W
0.8
WSW
Period(s) (?)1010161614141313121111117888998710
Wave
Graph
(?)Metric surfscale
Energy kJ (?)20376832837559239662886799103734749246722938171975460865044514266128
Wind
(km/h)
30
NNW
15
NW
20
WNW
15
SW
5
SSE
10
WSW
5
SSE
5
N
10
WNW
10
W
20
NW
20
NNW
25
WSW
30
WSW
30
WSW
20
WSW
15
WSW
15
WSW
5
SE
5
ENE
15
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on
oncross-
on
cross-
off
cross-
on
glassglassononcross-
on
crosscross-
on
cross-
on
oncross-
on
cross-
on
oncross-
off
glassoff
High Tide
/ height (m)
9:05AM
2.28
9:27PM
2.28
9:49AM
2.35
10:11PM
2.35
10:30AM
2.42
10:52PM
2.41
11:10AM
2.49
11:32PM
2.47
11:48AM
2.54
12:11AM
2.50
12:26PM
2.58
12:49AM
2.51
1:04PM
2.59
Low Tide
/ height (m)
2:50AM
0.67
3:16PM
0.67
3:36AM
0.63
4:01PM
0.60
4:20AM
0.59
4:43PM
0.53
5:00AM
0.54
5:23PM
0.47
5:40AM
0.49
6:03PM
0.42
6:18AM
0.46
6:41PM
0.39
6:56AM
0.44
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Mon
22
Sunrise-5:52--5:52--5:52--5:52--5:52--5:54--5:54-
Sunset--9:07--9:07--9:08--9:08--9:09--9:10--9:10
heavy rain
rain showers
thunderstorm
rain showers
clear
part cloud
cloud
cloud
cloud
rain showers
rain showers
heavy rain
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
part cloud
mod rain
heavy rain
Rain (mm)
36485-----761254251--617
Temp. °C171513111416131616151515131314121414121315
Feels °C (?)121298121311141513121276761010101114
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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 12 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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