Surf Forecasts:
Banks Peninsula - Stony Bay surf forecast from 17 Sep 2026:
- Best quality surf: Sunday 20 Sep, 12PM (local time) - 11ft (3.5m), 9s period, SSW swell with offshore winds.
- Most powerful swell: Sunday 20 Sep, 6PM (local time) - 15ft (4.5m), 12s period, SSW swell with 6,039 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 3PM (local time) - 3.5ft (1.1m), 15s period with SSW swell.
Best Forecast Surf Conditions for Banks Peninsula - Stony Bay this week:
The surf forecast for Banks Peninsula - Stony Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 18) at 3PM. The primary swell is predicted to be 1.1m and 15s period with a secondary swell of 0.9m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Banks Peninsula - Stony Bay in the next 16 days are 4.5m 12s and forecast to arrive on Sunday (Sep 20) at 6PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 6s period and expected on Sunday (Sep 20) at 3AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Fri 18th Sep) | 3.5ft (1.1m) 15s |
| Best Surf | 12PM (Sun 20th Sep) | 11ft (3.5m) 9s |
| Most Powerful | 6PM (Sun 20th Sep) | 15ft (4.5m) 12s |
Table - best surf conditions forecast for Banks Peninsula - Stony Bay over the next 16 days.
Short Range ForecastLight rain (total 9mm), mostly falling on Sat night. Very mild (max 16°C on Sat afternoon, min 6°C on Thu night). Winds increasing (calm on Fri afternoon, strong winds from the SW by Sun morning). | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Tue night. Very mild (max 11°C on Mon afternoon, min 5°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Thu 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | ||||||||||||||
PM | 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 15 | S 16 | ESE 12 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 12 | SSW 9 | SSW 11 | SSW 11 | S 10 | S 13 | S 12 | S 7 | SSW 16 | SSW 17 | SSW 16 | SSW 8 | S 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 71 | 137 | 196 | 519 | 986 | 642 | 465 | 276 | 848 | 4440 | 3001 | 1098 | 941 | 397 | 470 | 269 | 376 | 2696 | 534 | 1185 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-on | glassy | on | cross-on | cross | cross-off | cross-off | off | off | cross-on | cross-on | cross-off | off | cross-on | cross-off | off | cross-off | cross-off |
High Tide | 9:29PM1.70m | 9:59AM1.77m | 10:23PM1.66m | 10:53AM1.75m | 11:16PM1.64m | 11:44AM1.75m | 00:06AM1.64m | 12:32PM1.76m | 00:51AM1.65m | 1:16PM1.78m | 1:34AM1.68m | 1:58PM1.81m | 2:16AM1.71m | |||||||
Low Tide | 3:39AM0.43m | 4:13PM0.48m | 4:29AM0.47m | 5:03PM0.50m | 5:17AM0.48m | 5:52PM0.51m | 6:04AM0.47m | 6:38PM0.49m | 6:50AM0.44m | 7:22PM0.46m | 7:33AM0.40m | 8:05PM0.41m | ||||||||
 |  |  |  | |  | |  | | | | | | | | |  | | |  | |
 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:17 | — | — | 6:19 | — | — | 6:20 | — | — | 6:21 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — |
mm | 2 | — | — | — | — | — | — | 7 | — | 1 | — | — | — | 3 | 1 | — | 4 | 2 | — | — |
Temp °C | 7 | 7 | 11 | 12 | 9 | 13 | 16 | 12 | 9 | 8 | 8 | 10 | 11 | 11 | 8 | 9 | 8 | 8 | 8 | 5 |
Feels °C | 5 | 3 | 8 | 10 | 5 | 10 | 11 | 6 | 0 | 0 | 4 | 5 | 7 | 7 | 5 | 5 | 4 | 1 | 2 | 1 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 16 | ESE 12 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | NE 6 | SSW 15 | SE 11 | S 18 | S 10 | S 13 | S 12 | SSW 17 | S 7 | S 8 | ESE 11 | SSW 16 | S 15 |
| kJ | 52 | 137 | 193 | 519 | 986 | 642 | 465 | 66 | 234 | 30 | 332 | 1098 | 941 | 397 | 166 | 166 | 140 | 24 | 427 | 1185 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 14 | SSW 16 | ESE 12 | ESE 12 | SE 12 | ESE 11 | SSW 12 | NE 8 | NE 11 | ESE 11 | SE 10 | ENE 11 | NE 5 | NE 6 | SSW 16 | SSW 17 | — | ESE 11 | ESE 11 |
| kJ | 58 | 77 | 196 | 243 | 184 | 140 | 109 | 276 | 29 | 18 | 22 | 27 | 11 | 11 | 8 | 269 | 376 | — | 23 | 22 |
Swell 3 Height (m) Direction Period (s) | SSW 15 | ESE 9 | SSW 10 | NE 4 | NE 12 | NE 12 | S 18 | ESE 11 | ESE 11 | — | NE 9 | ENE 11 | ESE 10 | ENE 10 | SE 13 | SE 12 | ESE 12 | — | — | — |
| kJ | 71 | 34 | 51 | 7 | 5 | 6 | 56 | 71 | 47 | — | 3 | 11 | 10 | 10 | 42 | 23 | 45 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NNE 3 | — | NE 4 | NNE 5 | NNE 6 | NNW 5 | SSW 9 | SSW 11 | SSW 11 | — | NNE 4 | NW 4 | S 7 | — | SSW 9 | SSW 16 | SSW 8 | — |
| kJ | — | — | 6 | — | 4 | 56 | 115 | 35 | 848 | 4440 | 3001 | — | 17 | 17 | 470 | — | 217 | 2696 | 534 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 15 | 13 | 0 | 13 | 13 | 15 | 33 | 51 | 651 | 25 | 30 | 13 | 0 | 0 | 13 | 28 | 0 | 305 | 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 - 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 16 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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