Sumner Bar Surf Forecast

/ Canterbury (28 surf breaks) /

New Zealand (466 surf breaks) / Lat Long: (43.55° S 172.75° E)

Surf Forecasts:

Sumner Bar surfForecast / Canterbury / New Zealand

48hr Weather and Surf, issued 11 am Tuesday 16 Sep 2025 NZST

Forecast 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 10.4° C
(Which is 1.0°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 4PM is: 0.2m 11s primary swell from a East-southeast direction and 0.3m 2s secondary swell from a East-northeast direction (forecast issued at 11:00am September 16). An open ocean swell of 0.1m 14s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (NZST) & Date	Wave Height	Wave Period
Morning (16 Sep)	0.5ft (0.1m)	8s
Afternoon (16 Sep)	0.5ft (0.2m)	11s
Evening (16 Sep)	0.5ft (0.2m)	11s

Table - waves today at Sumner Bar. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Tuesday 16					Wednesday 17								Thursday 18								Friday 19
	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	SE	E	E	ESE	ESE	NNE	NNW	NNE	NNE	N	NW	NNW	NE	NE	NE	NE	NE	NE	SE	NE	SSE	SSE	SE	SE
Period(s) (?)	8	11	11	11	11	4	4	4	5	4	4	4	8	7	9	8	7	6	14	6	13	13	11	12
Wave Graph (?)
Energy (?)	2	12	10	15	18	22	35	49	74	50	57	26	25	26	46	40	26	13	13	1	142	23	66	67
Wind (km/h)	NE	E	E	E	SE	NW	NNW	N	N	N	NW	W	WNW	ESE	N	WNW	W	SSW	SW	S	SW	SSW	SW	WSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	glass	cross- on	cross- on	cross- on	cross	cross- off	cross	cross- on	cross- on	cross- on	cross	cross- off	glass	glass	cross- on	cross- off	cross- off	off	off	cross- off	off	off	off	cross- off
High Tide / height (m)		11:41AM 2.39					12:09AM 2.26				12:35PM 2.34				1:01AM 2.23				1:27PM 2.29				1:52AM 2.21
Low Tide / height (m)					6:04PM 0.51				6:18AM 0.47				6:56PM 0.50				7:09AM 0.47				7:44PM 0.49

	Tuesday 16					Wednesday 17								Thursday 18								Friday 19
Sunrise	6:30	-	-	-	-	-	-	-	6:28	-	-	-	-	-	-	-	6:26	-	-	-	-	-	-	-
Sunset	-	-	-	6:17	-	-	-	-	-	-	-	6:19	-	-	-	-	-	-	-	6:20	-	-	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1	4	4	1	1	1
Temp. °C	11	11	10	10	10	11	16	15	16	17	19	17	15	12	11	12	14	13	15	9	7	6	6	5
Feels °C (?)	9	8	6	6	8	8	9	8	8	11	14	14	14	11	8	9	10	8	12	5	4	2	2	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

Wind Update The wind is still cross-on at Sumner Bar (fresh winds from the ENE at Taylor's Mistake 3 km from Sumner Bar). 0.5m 11s groundswell from the ESE with a 0.4m 11s groundswell from the E. 2 swells combining to make bigger set waves.
1 hour 35 minutes ago Sumner Bar

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1 h 35 min ago

30 km/h

ENE

Cross-On

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