Banks Peninsula - Magnet Bay Surf Break

Lat Long: 43.87° S 172.80° E

Banks Peninsula - Magnet Bay Surf Forecast and Surf Report

Issued: 11 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Banks Peninsula - Magnet Bay sea temperature is
10.2° C
1.4° 

Banks Peninsula - Magnet Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Banks Peninsula - Magnet Bay surf forecast from 17 Aug 2026:

  • Best quality surf: Wednesday 19 Aug, 3AM (local time) - 11ft (3.5m), 15s period, S swell with onshore winds.
  • Most powerful swell: Wednesday 19 Aug, 12AM (local time) - 13ft (4.0m), 14s period, S swell with 6,163 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 19 Aug, 3AM (local time) - 11ft (3.5m), 15s period with S swell.

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

The surf forecast for Banks Peninsula - Magnet Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 3AM. The primary swell is predicted to be 3.5m and 15s period with a secondary swell of 0.4m and 12s. The wind is predicted to be onshore as the swell arrives.

The most powerful waves expected at Banks Peninsula - Magnet Bay in the next 16 days are 4.0m 14s and forecast to arrive on Wednesday (Aug 19) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Monday (Aug 24) at 9AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Wed 19th Aug)11ft (3.5m) 15s
Best Surf 3AM (Wed 19th Aug)11ft (3.5m) 15s
Most Powerful12AM (Wed 19th Aug)13ft (4.0m) 14s

Table - best surf conditions forecast for Banks Peninsula - Magnet Bay over the next 16 days.


Short Range Forecast

Light rain (total 7mm), mostly falling on Mon night. Very mild (max 10°C on Tue morning, min 7°C on Mon night). Winds decreasing (strong winds from the SW on Tue morning, calm by Thu morning).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 15°C on Sat afternoon, min 7°C on Thu night). Winds increasing (calm on Fri morning, fresh winds from the WNW 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
Rating
(10 max)
0
0
0
0
!
!
3
2
2
4
3
2
2
0
1
0
0
0
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SSW
6
3.5
SSW
9
5
SSW
10
4
S
14
3
S
14
3
S
14
1.9
S
12
1.7
S
11
1.6
S
11
1.6
S
15
1.3
S
13
1.2
S
11
1
S
10
0.8
S
10
0.7
S
10
0.5
S
9
0.4
SSW
15
0.7
SSW
15
1.6
SSW
11
Wave Graph
Metric surfscale
Energy kJ
197
1961
4793
6163
3659
2934
1002
676
663
1209
547
364
212
130
94
45
71
234
550
Wind (km/h)
20
WSW
40
SW
40
SSW
25
SSW
10
W
10
SSW
5
SW
5
S
5
SE
10
NE
10
NNE
5
E
10
NNW
15
NW
10
NNE
25
NNW
25
WNW
30
WNW
15
N
Wind State
cross-on
on
on
cross-on
cross-on
on
on
cross-on
cross
off
cross-off
glassy
cross-off
cross
cross-off
cross-off
cross
cross-on
cross-off
High Tide
7:44AM1.77m
8:08PM1.71m
8:41AM1.70m
9:06PM1.63m
9:41AM1.66m
10:05PM1.58m
10:40AM1.65m
11:02PM1.57m
11:34AM1.66m
11:54PM1.58m
12:23PM1.69m
00:40AM1.61m
Low Tide
1:34AM0.25m
2:02PM0.33m
2:26AM0.33m
2:57PM0.42m
3:19AM0.40m
3:52PM0.48m
4:12AM0.45m
4:46PM0.51m
5:03AM0.47m
5:37PM0.52m
5:51AM0.46m
6:24PM0.50m
rain showers
rain showers
light rain
light rain
rain showers
clear
part cloud
part cloud
part cloud
clear
part cloud
clear
part cloud
clear
part cloud
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:20
7:18
7:16
7:15
7:13
7:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:45
5:46
5:47
5:49
5:50
5:51
 mm
2
2
1
1
1
Temp °C
9
10
8
8
10
10
7
10
9
8
10
12
10
13
15
13
13
12
10
Feels °C
1
1
-1
0
7
7
4
9
7
5
8
11
7
10
12
7
5
5
1
  • Map Icons:
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  • 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 - Magnet Bay Surf forecast

The above surf forecast table for Banks Peninsula - Magnet Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Banks Peninsula - Magnet Bay can be found by selecting the local surf guide option on the grey menu. Our Banks Peninsula - Magnet 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 - Magnet 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 - Magnet 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 - Magnet Bay, camping, hotels and holiday cottages in Canterbury, consider staying in Christchurch which is 37 km (23 miles) away.

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