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Surf Forecasts:
Sumner Bar surfForecast / Canterbury / New Zealand
48hr Weather and Surf, issued 6 am 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
17.5° C
(Which is 4.4°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 10AM is: 0.6m 7s primary swell from a South-southeast direction and 0.4m 8s secondary swell from a East-northeast direction (forecast issued at 06:00am December 17). An open ocean swell of 1.7m 6s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (NZDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 2ft (0.6m) | 7s |
| Afternoon (17 Dec) | 2.5ft (0.8m) | 8s |
| Evening (17 Dec) | 2ft (0.6m) | 8s |
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 | Sat 20 | |||||||||||||||||||||
| 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 | 4 PM | 7 PM | 10 PM | 1 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 8 | 8 | 4 | 6 | 6 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 35 | 21 | 32 | 33 | 64 | 37 | 49 | 50 | 53 | 55 | 57 | 55 | 32 | 30 | 20 | 14 | 7 | 19 | 26 | 13 | 18 | 30 | 12 | 12 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | off | off | cross- off | off | off | off | off | cross- off | cross- off | cross- on | on | on | cross- on | glass | cross- off | cross | cross- on | cross- on | cross- on | off | off | cross- off |
High Tide / height (m) | 3:25AM 2.20 | 3:45PM 2.08 | 4:10AM 2.22 | 4:30PM 2.08 | 4:53AM 2.23 | 5:12PM 2.09 | ||||||||||||||||||
Low Tide / height (m) | 9:46AM 0.80 | 9:45PM 0.75 | 10:29AM 0.80 | 10:29PM 0.76 | 11:09AM 0.79 | 11:14PM 0.75 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | |||||||||||||||||||||
| Sunrise | - | 5:41 | - | - | - | - | - | - | - | 5:41 | - | - | - | - | - | - | - | 5:41 | - | - | - | - | - | - |
| Sunset | - | - | - | - | - | 9:07 | - | - | - | - | - | - | - | 9:07 | - | - | - | - | - | - | - | 9:07 | - | - |
 |  |  |  |  |  |  | |  |  | | | | | | | | | | | | |  | | |
Rain (mm) | 13 | 10 | 4 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 |
| Temp. °C | 10 | 10 | 11 | 12 | 14 | 14 | 11 | 11 | 10 | 10 | 13 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 16 | 19 | 19 | 11 | 9 | 8 |
| Feels °C (?) | 6 | 7 | 7 | 7 | 9 | 10 | 8 | 8 | 7 | 7 | 11 | 13 | 12 | 12 | 14 | 15 | 12 | 13 | 14 | 16 | 14 | 3 | 2 | 3 |
- 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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