Surf Forecasts:
Banks Peninsula - Magnet Bay surf forecast from 18 Sep 2026:
- Best quality surf: Sunday 20 Sep, 6PM (local time) - 13ft (4.0m), 10s period, SSW swell with cross-onshore winds.
- Most powerful swell: Sunday 20 Sep, 3PM (local time) - 16ft (5.0m), 11s period, SSW swell with 5,955 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 6PM (local time) - 13ft (4.0m), 10s period with SSW 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 Sunday (Sep 20) at 6PM. The primary swell is predicted to be 4.0m and 10s period with a secondary swell of 0.3m and 11s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Banks Peninsula - Magnet Bay in the next 16 days are 5.0m 11s and forecast to arrive on Sunday (Sep 20) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Sep 26) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 20th Sep) | 13ft (4.0m) 10s |
| Best Surf | 6PM (Sun 20th Sep) | 13ft (4.0m) 10s |
| Most Powerful | 3PM (Sun 20th Sep) | 16ft (5.0m) 11s |
Table - best surf conditions forecast for Banks Peninsula - Magnet Bay over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Sat night. Very mild (max 16°C on Sat morning, min 7°C on Sun night). Mainly strong winds. | Days 5-7 Weather SummaryHeavy rain (total 23mm), heaviest during Wed night. Very mild (max 13°C on Mon night, min 6°C on Tue night). Winds decreasing (fresh winds from the SSW on Wed morning, calm by Thu afternoon). | ||||||||||||||||||
Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | ||||||||||||||
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) | SSW 16 | SSW 14 | SSW 12 | SSW 16 | SSW 10 | SSW 11 | S 10 | S 13 | S 12 | S 11 | S 7 | SSW 16 | SSW 15 | SSW 8 | SSW 8 | SSW 10 | SSW 9 | S 9 | SSW 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 1437 | 838 | 469 | 320 | 2496 | 5955 | 1599 | 1497 | 948 | 338 | 387 | 324 | 308 | 1193 | 763 | 978 | 422 | 230 | 563 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross | cross-on | on | cross-on | off | off | glassy | on | on | cross-off | on | on | on | on | cross-on | glassy | off |
High Tide | 9:29PM1.54m | 10:02AM1.63m | 10:27PM1.53m | 10:57AM1.64m | 11:19PM1.55m | 11:46AM1.67m | 00:05AM1.58m | 12:29PM1.71m | 00:46AM1.62m | 1:09PM1.75m | 1:25AM1.67m | 1:48PM1.79m | 2:03AM1.73m | ||||||
Low Tide | 3:36AM0.49m | 4:12PM0.53m | 4:27AM0.50m | 5:02PM0.52m | 5:15AM0.47m | 5:48PM0.48m | 6:00AM0.42m | 6:31PM0.44m | 6:43AM0.36m | 7:12PM0.38m | 7:24AM0.30m | 7:52PM0.32m | |||||||
 |  |  |  | |  | | | | | | | |  |  | | | |  | |
 | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — |
 | — | — | 6:21 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:25 | — | — | 6:27 | — |
mm | — | — | — | 1 | — | — | — | — | — | 4 | — | — | 5 | 4 | 2 | 8 | — | — | — |
Temp °C | 9 | 16 | 16 | 12 | 9 | 10 | 8 | 12 | 15 | 13 | 9 | 10 | 7 | 7 | 8 | 8 | 10 | 12 | 9 |
Feels °C | 5 | 12 | 12 | 8 | -2 | 2 | 4 | 10 | 13 | 9 | 5 | 6 | 3 | -1 | 2 | 2 | 6 | 10 | 5 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 14 | SSW 12 | SSW 10 | ESE 11 | ESE 11 | S 10 | S 13 | S 12 | S 11 | S 7 | SSW 8 | SSW 15 | ESE 11 | SSW 15 | SSW 9 | SSW 9 | S 9 | SSW 9 |
| kJ | 1437 | 838 | 469 | 147 | 47 | 23 | 1599 | 1497 | 948 | 338 | 387 | 183 | 308 | 12 | 284 | 422 | 422 | 230 | 383 |
Swell 2 Height (m) Direction Period (s) | SE 12 | ESE 12 | ESE 11 | SSW 16 | — | — | S 16 | ESE 10 | NE 4 | SSW 15 | SSW 16 | SSW 16 | WNW 3 | ESE 11 | ESE 11 | S 15 | S 15 | S 14 | S 14 |
| kJ | 147 | 93 | 82 | 320 | — | — | 539 | 10 | 3 | 73 | 333 | 324 | 4 | 24 | 12 | 161 | 159 | 146 | 106 |
Swell 3 Height (m) Direction Period (s) | — | NE 5 | NE 6 | SE 11 | — | — | ESE 11 | E 11 | ESE 10 | NE 10 | ESE 13 | SE 12 | ESE 12 | — | — | ESE 11 | ESE 10 | ESE 10 | ESE 11 |
| kJ | — | 6 | 8 | 61 | — | — | 11 | 2 | 10 | 25 | 33 | 23 | 14 | — | — | 11 | 10 | 10 | 11 |
Wind waves Height (m) Direction Period (s) | NE 4 | N 3 | WNW 3 | WNW 4 | SSW 10 | SSW 11 | — | NNE 3 | — | NW 4 | — | — | SSW 10 | SSW 8 | SSW 8 | SSW 10 | NW 2 | NW 3 | SSW 10 |
| kJ | 10 | 5 | 3 | 13 | 2496 | 5955 | — | 7 | — | 6 | — | — | 218 | 1193 | 763 | 978 | 1 | 2 | 563 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 4 | 26 | 26 | 118 | 746 | 0 | 0 | 0 | 26 | 30 | 0 | 162 | 30 | 30 | 30 | 26 | 0 | 0 |
Best forecast wave conditions in Canterbury | |||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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