Banks Peninsula - Stony Bay surfForecast / Canterbury / New Zealand

information circle12 Day Weather and Surf, issued 12 am Wednesday 17 Dec 2025 NZDT
Forecast update in hr  min  s Forecast update imminent
Banks Peninsula - Stony Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Banks Peninsula - Stony Bay sea temperature is
16.5° C
(Which is 3.5°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Banks Peninsula - Stony Bay this week:

The surf forecast for Banks Peninsula - Stony Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Dec 17) at 4AM. The primary swell is predicted to be 0.8m and 8s period with a secondary swell of 0.4m and 7s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Banks Peninsula - Stony Bay in the next 12 days are 3.0m 13s and forecast to arrive on Monday (Dec 22) at 10AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Dec 17) at 4AM.

Wave TypeTime (NZDT) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Wed 17th Dec)2.5ft (0.8m) 8s
Best Surf10AM (Sun 21st Dec)10ft (3.0m) 9s
Most Powerful10AM (Mon 22nd Dec)10ft (3.0m) 13s

Table - best surf conditions forecast for Banks Peninsula - Stony Bay over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Heavy rain (total 23mm), heaviest during Tue night. Very mild (max 19°C on Fri morning, min 10°C on Wed night). Winds increasing (calm on Thu morning, fresh winds from the NNW by Fri afternoon).

Days 3-6 Weather Summary Moderate rain (total 12mm), heaviest on Fri night. Very mild (max 15°C on Mon morning, min 8°C on Fri night). Winds decreasing (fresh winds from the SSW on Fri night, calm by Sun night).

Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tue
23
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
1
3
2
1
0
1
0
0
2
2
2
3
4
3
3
4
1
0
0
1
Swell
Height Map
Wave Height (m) & direction (?)
1.1
NE
2.2
S
2.5
S
1.6
SE
1.4
SSE
1.2
SSE
0.7
SE
0.4
SSW
1.3
N
2.1
S
1.7
SSW
2
SSW
2.1
SSW
3
SSW
2.4
SSW
2.5
SSW
3
S
3
S
2.1
S
1.6
S
1.4
S
Period(s) (?)877888712577889991312111010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)14944265433025115047578549126248658314699801197281421881018504369
Wind
(km/h)
20
SSW
25
SSW
25
SSW
15
WSW
5
WNW
15
NNE
10
WNW
10
NNW
30
NNW
15
SW
15
SW
15
SW
10
W
15
SW
5
S
10
NNE
5
NNE
20
NE
20
NNE
15
NW
20
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
offoffoffglassoncross-
off
cross-
on
crossoffoffoffcross-
off
offcross-
off
onglassononcrosscross-
off
High Tide
/ height (m)
3:27AM
1.80
3:42PM
1.71
4:09AM
1.83
4:25PM
1.72
4:52AM
1.86
5:08PM
1.72
5:34AM
1.88
5:51PM
1.73
6:17AM
1.89
6:34PM
1.72
6:59AM
1.88
7:16PM
1.70
7:41AM
1.86
Low Tide
/ height (m)
9:35AM
0.46
9:48PM
0.39
10:21AM
0.45
10:31PM
0.39
11:05AM
0.44
11:14PM
0.38
11:50AM
0.43
11:58PM
0.37
12:34PM
0.42
12:42AM
0.37
1:18PM
0.41
1:25AM
0.36
2:02PM
0.41
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tue
23
Sunrise-5:39--5:39--5:41--5:41--5:41--5:41--5:41-
Sunset--9:06--9:06--9:07--9:07--9:07--9:08--9:08
rain showers
light rain
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
mod rain
part cloud
part cloud
light rain
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
Rain (mm)
203-------10--2--------
Temp. °C131313111516161918101312101213121515181919
Feels °C (?)11888131315151241077810101211151616
  • 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 Banks Peninsula - Stony Bay Surf forecast

The above surf forecast table for Banks Peninsula - Stony Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Banks Peninsula - Stony Bay can be found by selecting the local surf guide option on the grey menu. Our Banks Peninsula - Stony Bay 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 (Banks Peninsula - Stony Bay) 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 Banks Peninsula - Stony Bay 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 Canterbury? If you are looking for accommodation near Banks Peninsula - Stony Bay, camping, hotels and holiday cottages in Canterbury, consider staying in Christchurch which is 35 km (22 miles) away.

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