- Forecast
- Maps
- Live
- Weather State
- Spot Information
Sumner Bar Surf Forecast
/ Canterbury (28 surf breaks) /
Surf Forecasts:
Sumner Bar surfForecast / Canterbury / New Zealand
12 Day Weather and Surf, issued 5 am Saturday 30 Aug 2025 NZST
Best Forecast Surf Conditions for Sumner Bar this week:
The most powerful waves expected at Sumner Bar in the next 12 days are 0.8m 11s and forecast to arrive on Saturday (Aug 30) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 8s period and expected on Friday (Sep 05) at 9PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12PM (Sat 30th Aug) | 2.5ft (0.8m) 11s |
Table - best surf conditions forecast for Sumner Bar over the next 12 days.
Short Range Forecast Light rain (total 5mm), mostly falling on Sun afternoon. Very mild (max 15°C on Mon afternoon, min 4°C on Sun night). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Tue afternoon. Very mild (max 15°C on Thu morning, min 5°C on Tue night). Winds increasing (calm on Wed morning, fresh winds from the NNW by Thu morning). | ||||||||||||||||||||
Saturday 30 | Sunday 31 | Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | Friday 05 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 11 | 10 | 10 | 10 | 10 | 10 | 13 | 14 | 14 | 13 | 9 | 11 | 10 | 9 | 5 | 5 | 4 | 7 | 13 | 13 | 13 |
Wave (?)Graph  | |||||||||||||||||||||
| Energy (?) | 112 | 92 | 71 | 37 | 23 | 38 | 24 | 38 | 39 | 51 | 6 | 53 | 57 | 32 | 39 | 83 | 42 | 11 | 9 | 14 | 19 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | off | cross- on | cross- off | cross- on | cross- on | cross- off | glass | cross- off | off | cross- off | cross- off | cross- on | on | on | cross | glass | off | cross- off | cross- off |
High Tide / height (m) | 9:33AM 2.15 | 9:57PM 2.06 | 10:15AM 2.14 | 10:42PM 2.04 | 11:00AM 2.13 | 11:27PM 2.03 | 11:50AM 2.13 | 12:16AM 2.03 | 12:42PM 2.14 | 1:07AM 2.04 | 1:33PM 2.17 | 1:57AM 2.08 | 2:21PM 2.22 | 2:45AM 2.14 | |||||||
Low Tide / height (m) | 3:39PM 0.80 | 3:58AM 0.78 | 4:29PM 0.83 | 4:45AM 0.81 | 5:20PM 0.83 | 5:34AM 0.79 | 6:12PM 0.80 | 6:21AM 0.75 | 7:02PM 0.75 | 7:10AM 0.69 | 7:49PM 0.67 | 7:59AM 0.61 | 8:34PM 0.58 | ||||||||
Saturday 30 | Sunday 31 | Monday 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | Friday 05 | |||||||||||||||
| Sunrise | 7:00 | - | - | 6:58 | - | - | 6:56 | - | - | 6:54 | - | - | 6:52 | - | - | 6:50 | - | - | 6:50 | - | - |
| Sunset | - | 5:59 | - | - | 6:00 | - | - | 6:00 | - | - | 6:02 | - | - | 6:04 | - | - | 6:05 | - | - | 6:06 | - |
 | |  |  |  |  |  | | | | | | | | | | |  | | | | |
Rain (mm) | - | - | - | - | 5 | - | - | - | - | - | 2 | - | - | - | - | - | - | 1 | - | 4 | 2 |
| Temp. °C | 9 | 12 | 10 | 8 | 7 | 5 | 14 | 15 | 9 | 14 | 9 | 7 | 9 | 8 | 8 | 15 | 14 | 11 | 10 | 10 | 6 |
| Feels °C (?) | 5 | 9 | 6 | 5 | 3 | 2 | 8 | 9 | 5 | 8 | 2 | 1 | 7 | 3 | 2 | 8 | 7 | 7 | 6 | 7 | 1 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Canterbury
Recent clean conditions at Sumner Bar have likely become affected by the arrival of onshore winds (light winds from the NE at Taylor's Mistake 3 km from Sumner Bar). 0.9m 11s groundswell from the ENE with a 0.3m 3s local chop from the SE. 2 swells combining to make bigger set waves.
1 h 18 min ago
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Sumner Bar surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Sumner Bar Surf forecast
The above surf forecast table for Sumner Bar provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Sumner Bar can be found by selecting the local surf guide option on the grey menu. Our Sumner Bar 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 (Sumner Bar) 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 Sumner Bar 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 Sumner Bar, camping, hotels and holiday cottages in Canterbury, consider staying in Christchurch which is 7 km (4 miles) away.
Nearest