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Surf Forecasts:
Sumner Bar surfForecast / Canterbury / New Zealand
48hr Weather and Surf, issued 6 pm Wednesday 17 Dec 2025 NZDTForecast update in hr min s Forecast update imminent
Sumner Bar surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Sumner Bar sea temperature is
18.2° C
(Which is 5.1°C warmer than normal for this time of year)How big are the waves at Sumner Bar today?
The current surf forecast for Sumner Bar at 1AM is: 0.7m 8s primary swell from a Southeast direction and 0.2m 9s secondary swell from a East-northeast direction (forecast issued at 06:00pm December 17). An open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (NZDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Dec) | 2ft (0.6m) | 8s |
| Afternoon (18 Dec) | 1.5ft (0.5m) | 8s |
| Evening (18 Dec) | 1.5ft (0.4m) | 7s |
Table - waves today at Sumner Bar. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 4 | 5 | 8 | 10 | 10 | 7 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 38 | 55 | 84 | 72 | 55 | 54 | 51 | 29 | 28 | 19 | 19 | 8 | 7 | 7 | 14 | 13 | 17 | 17 | 12 | 20 | 24 | 13 | 18 | 7 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | off | off | cross- off | off | cross- off | glass | on | on | cross- on | glass | cross- off | glass | cross- on | cross- on | cross- on | off | off | cross- off | cross- off | off | cross- off | off |
High Tide / height (m) | 3:45PM 2.08 | 4:10AM 2.22 | 4:30PM 2.08 | 4:53AM 2.23 | 5:12PM 2.09 | 5:35AM 2.23 | ||||||||||||||||||
Low Tide / height (m) | 9:45PM 0.75 | 10:29AM 0.80 | 10:29PM 0.76 | 11:09AM 0.79 | 11:14PM 0.75 | 11:49AM 0.77 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 5:41 | - | - | - | - | - | - | - | 5:41 | - | - | - | - | - | - | - | 5:43 | - | - |
| Sunset | - | 9:07 | - | - | - | - | - | - | - | 9:07 | - | - | - | - | - | - | - | 9:07 | - | - | - | - | - | - |
 | |  |  |  |  | | | |  | | | | | | | | |  | |  | | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 2 | 1 | - | - | 1 |
| Temp. °C | 14 | 13 | 11 | 10 | 9 | 10 | 12 | 14 | 14 | 15 | 15 | 15 | 14 | 14 | 16 | 19 | 18 | 11 | 10 | 8 | 8 | 8 | 12 | 11 |
| Feels °C (?) | 8 | 8 | 7 | 6 | 6 | 8 | 10 | 13 | 11 | 12 | 14 | 15 | 12 | 13 | 14 | 13 | 11 | 4 | 4 | 3 | 4 | 4 | 8 | 8 |
- 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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