Sumner Bar 48 hour detailed Surf Forecast

Lat Long: 43.56° S 172.76° E

Issued: 11 am 18 Jul 2026 (local time)

Forecast update in hr min

Today's Sumner Bar sea temperature is

10.0° C

Sumner Bar surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Surf Forecasts:

How big are the waves at Sumner Bar today (18 Jul):

Morning surf: Morning surf (18 Jul, local time) - 3.5ft (1.0m), 15s period with E swell.
Afternoon surf: Afternoon surf (18 Jul, local time) - 4.5ft (1.3m), 23s period with SSE swell.
Evening surf: Evening surf (18 Jul, local time) - 2.5ft (0.8m), 14s period with E swell.

The current surf forecast for Sumner Bar at 6PM is: 0.9m 23s primary swell from a South-southeast direction and 0.8m 14s secondary swell from a East direction, 0.5m 23s secondary swell from a South-southeast direction (forecast issued at 11:00am July 18). The wind direction is predicted to be glassy and the swell rating is 3.

Time (NZST) & Date	Wave Height	Wave Period
Morning (18 Jul)	3.5ft (1.0m)	15s
Afternoon (18 Jul)	4.5ft (1.3m)	23s
Evening (18 Jul)	2.5ft (0.8m)	14s

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

	Short Range Forecast Mostly dry. Very mild (max 12°C on Sat afternoon, min 7°C on Mon night). Wind will be generally light.
	Sat 18					Sunday 19								Monday 20
	9 AM	12 PM	3 PM	6 PM	9 PM	12 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	12 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM
Rating (10 max)	3	3	4	3	2	2	2	2	2	1	1	0	1	2	2	2	2	1	1	0	0
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	E 15	SSE 23	SSE 23	SSE 23	E 14	E 14	E 14	E 14	E 13	E 13	E 13	E 13	SSE 19	ESE 12	ESE 12	SSE 19	SSE 19	SSE 19	SSE 19	SSE 18	SSE 17
Wave Graph
kJ	447	404	1783	738	260	246	189	181	176	126	142	140	140	190	167	246	325	322	312	218	168
Wind (km/h)	WSW	WNW	NNE	NE	W	WSW	WSW	SW	SW	SW	E	ENE	ESE	NNE	NNW	ENE	NNE	NNE	ENE	ENE	NE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-off	cross-off	glassy	glassy	cross-off	cross-off	off	off	off	off	cross-on	on	glassy	glassy	glassy	glassy	glassy	on	on	cross-on	on
High Tide	7:25AM2.39m				7:50PM2.45m				8:22AM2.35m				8:46PM2.36m					9:16AM2.31m
Low Tide			1:32PM0.22m				2:06AM0.31m				2:25PM0.33m				2:59AM0.39m					3:20PM0.47m


	7:54	—	—	—	—	—	—	7:54	—	—	—	—	—	—	—	7:54	—	—	—	—	—
	—	—	5:14	—	—	—	—	—	—	—	5:15	—	—	—	—	—	—	—	5:15	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Temp °C	8	10	12	10	10	10	10	10	10	10	11	9	9	8	8	8	8	9	9	8	8
Feels °C	5	7	10	8	8	7	6	6	7	8	9	6	7	7	6	6	6	7	6	5	4
Swell 1 Height (m) Direction Period (s)	E 15	ESE 15	ESE 14	E 14	E 14	E 14	E 14	E 14	E 13	E 13	E 13	E 13	E 13	E 12	SSE 19	SSE 19	SSE 19	SSE 19	SSE 19	SSE 18	SSE 17
kJ	447	355	346	253	246	246	189	181	176	126	125	123	82	77	137	246	325	322	312	218	168
Swell 2 Height (m) Direction Period (s)	SSE 23	SSE 23	SSE 23	SSE 23	SSE 21	SSE 18	SSE 18	SSE 16	SSE 16	SSE 16	SSE 19	SSE 19	SSE 19	SSE 18	E 12	E 12	ESE 12	ESE 12	ESE 12	ESE 12	ESE 12
kJ	422	404	401	290	260	110	108	91	86	48	142	140	140	134	76	75	49	49	49	48	47
Swell 3 Height (m) Direction Period (s)	—	—	SSE 23	SSE 23	—	SSE 22	SSE 22	SSE 21	SE 21	SSE 20	—	—	—	ESE 12	ESE 12	—	—	—	—	—	—
kJ	—	—	1783	738	—	46	45	43	17	37	—	—	—	190	167	—	—	—	—	—	—
Wind waves Height (m) Direction Period (s)	—	—	—	—	—	—	—	—	—	S 6	—	—	—	—	—	—	—	—	—	—	NE 2
kJ	—	—	—	—	—	—	—	—	—	59	—	—	—	—	—	—	—	—	—	—	1
Nearest Offshore or Glassy	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	Taylors Mistake Canterbury	Banks Peninsula - Raupo Bay Canterbury	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	South Shore Canterbury	Banks Peninsula - Raupo Bay Canterbury	Banks Peninsula - Te Oka Bay Canterbury	Banks Peninsula - Te Oka Bay Canterbury	Banks Peninsula - Te Oka Bay Canterbury
Rating (10 max)	3	3	4	4	3	2	2	2	2	2	2	4	2	2	2	2	2	5	5	4	4
Distance (km)	0	0	0	0	0	0	0	0	0	0	3	25	0	0	0	0	0	25	33	33	33
Best forecast wave conditions in Canterbury	Banks Peninsula - Gough Bay	Banks Peninsula - Gough Bay	Banks Peninsula - Gough Bay	Banks Peninsula - Gough Bay	Banks Peninsula - Gough Bay	Banks Peninsula - Gough Bay	Gore Bay	Smithfield	Gore Bay	Gore Bay	Fields	Banks Peninsula - Te Oka Bay	Banks Peninsula - Stony Bay	Banks Peninsula - Magnet Bay	Banks Peninsula - Magnet Bay	Banks Peninsula - Gough Bay	Banks Peninsula - Te Oka Bay	Banks Peninsula - Te Oka Bay	Banks Peninsula - Gough Bay	Banks Peninsula - Gough Bay	Banks Peninsula - Gough Bay
Rating (10 max)	9	8	6	6	5	5	4	4	4	4	4	4	4	4	5	6	5	5	5	5	4
Best forecast wave conditions in New Zealand	Banks Peninsula - Gough Bay Canterbury	Papatowai Catlins	Papatowai Catlins	White Rock - The Spit Wairarapa	Shingles West Coast South Island	White Rock - The Spit Wairarapa	Makorori Centre Gisborne and Mahia	Papatowai Catlins	Papatowai Catlins	Papatowai Catlins	Papatowai Catlins	Papatowai Catlins	Papatowai Catlins	Papatowai Catlins	Papatowai Catlins	Otago Peninsula - Allans Beach Otago	Otago Peninsula - Papanui Beach Otago	Ning Nong Point and Reef Wairarapa	Humenga Point Wairarapa	Papatowai Catlins	Ning Nong Point and Reef Wairarapa
Rating (10 max)	9	9	9	9	5	7	4	6	6	6	6	6	7	7	7	8	7	6	6	5	6
Header Global	Dunedin - Bobs Beach New Zealand	Papatowai New Zealand	Papatowai New Zealand	Seconds (White Rock) New Zealand	Seconds (White Rock) New Zealand	Seconds (White Rock) New Zealand	Seconds (White Rock) New Zealand	Dunedin - Cob Cottage New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Otago Peninsula - Allans Beach New Zealand	Otago Peninsula - Allans Beach New Zealand	Ning Nong Point and Reef New Zealand	Humenga Point New Zealand	Humenga Point New Zealand	Ning Nong Point and Reef New Zealand
Rating (10 max)	6	9	9	9	8	7	6	6	6	6	6	6	7	7	7	8	7	6	6	5	6

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

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Sumner Bar 48 hour detailed Surf Forecast

How big are the waves at Sumner Bar today (18 Jul):

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