Backdoor 4 48 hour detailed Surf Forecast

Lat Long: 33.28° S 151.57° E

Issued: 9 am 16 Aug 2026 (local time)

Forecast update in hr min

Today's Backdoor 4 sea temperature is

17.3° C

Backdoor 4 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 Backdoor 4 today (16 Aug):

Morning surf: Morning surf (16 Aug, local time) - 5ft (1.5m), 6s period with SSE swell.
Afternoon surf: Afternoon surf (16 Aug, local time) - 4.5ft (1.4m), 7s period with SE swell.
Evening surf: Evening surf (16 Aug, local time) - 3.5ft (1.0m), 11s period with S swell.

The current surf forecast for Backdoor 4 at 1PM is: 0.5m 17s primary swell from a South direction and 1.1m 7s secondary swell from a South direction, 1.0m 6s secondary swell from a East-southeast direction (forecast issued at 09:00am August 16). The wind direction is predicted to be cross-offshore.

Time (AEST) & Date	Wave Height	Wave Period
Morning (16 Aug)	5ft (1.5m)	6s
Afternoon (16 Aug)	4.5ft (1.4m)	7s
Evening (16 Aug)	3.5ft (1.0m)	11s

Table - waves today at Backdoor 4. (Swell directed towards the surf break)

	Short Range Forecast Some drizzle, heaviest during Sun morning. Very mild (max 16°C on Sun morning, min 14°C on Sun night). Wind will be generally light.
	Sunday 16						Monday 17								Tuesday 18
	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
Rating (10 max)	1	1	1	1	2	1	2	2	2	2	2	0	0	1	0	0	1	0	0	1	1	1
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	S 17	SSE 6	S 17	SE 7	SSE 7	S 11	S 11	S 11	S 10	S 10	S 9	ESE 7	ESE 7	ESE 7	ESE 7	ESE 7	ESE 7	ESE 7	ESE 7	SE 7	ESE 13	ESE 7
Wave Graph
kJ	148	175	148	183	204	246	189	178	128	116	111	88	88	96	88	93	118	120	120	77	90	101
Wind (km/h)	SE	SE	SE	SSE	SE	E	ESE	ESE	WSW	SSE	ESE	ESE	ESE	ESE	E	E	E	E	E	E	E	E
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-off	cross-off	cross-off	cross-off	cross-off	cross	cross-off	glassy	glassy	cross-off	cross-off	cross-off	cross-off	cross-off	cross	cross	cross	cross	cross	cross	cross	cross
High Tide			10:39AM1.38m				10:43PM1.39m				11:21AM1.37m				11:25PM1.23m				12:04PM1.35m
Low Tide	4:26AM0.10m				4:39PM0.29m				5:00AM0.19m				5:30PM0.36m				5:34AM0.29m				6:25PM0.44m


	6:31	—	—	—	—	—	—	6:30	—	—	—	—	—	—	—	6:28	—	—	—	—	—	—
	—	—	—	5:23	—	—	—	—	—	—	—	5:24	—	—	—	—	—	—	—	5:25	—	—
mm	1	1	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Temp °C	14	16	16	16	16	15	15	15	14	15	15	16	15	15	15	15	16	16	16	16	16	16
Feels °C	11	12	12	12	12	13	13	13	12	13	12	12	12	13	13	12	13	12	12	13	13	14
Swell 1 Height (m) Direction Period (s)	S 6	S 17	S 7	S 12	SSE 7	S 11	ESE 6	ESE 7	ESE 7	ESE 7	ESE 7	ESE 7	S 9	ESE 7	S 8	S 8	S 12	S 11	S 11	SE 7	SE 8	ESE 7
kJ	97	147	114	69	204	246	75	85	93	91	91	88	74	96	35	35	95	85	56	77	69	101
Swell 2 Height (m) Direction Period (s)	S 17	S 12	S 17	S 18	S 18	S 18	S 11	S 11	S 10	S 10	S 9	S 9	SSW 12	S 9	S 12	SE 10	SE 10	E 9	ESE 14	S 11	ESE 13	ESE 12
kJ	148	26	148	96	54	54	189	178	128	116	111	80	52	52	44	28	28	6	41	56	90	83
Swell 3 Height (m) Direction Period (s)	ENE 10	ENE 10	S 12	ENE 10	ENE 10	SE 7	SSE 6	S 17	S 17	S 14	SSW 13	SSW 13	ENE 9	S 12	ENE 10	S 12	ENE 9	SE 15	E 9	ESE 14	S 11	S 11
kJ	19	20	27	10	10	7	16	23	22	34	56	53	8	26	18	24	8	9	6	71	55	55
Wind waves Height (m) Direction Period (s)	ESE 5	SSE 6	ESE 6	SE 7	—	ESE 6	—	—	—	—	—	—	ESE 7	—	ESE 7	ESE 7	ESE 7	ESE 7	ESE 7	E 6	E 6	—
kJ	28	175	77	183	—	64	—	—	—	—	—	—	88	—	88	93	118	120	120	30	24	—
Nearest Offshore or Glassy	JD Reef NSW - Newcastle	Peggys NSW - Illawarra	Peggys NSW - Illawarra	Warriewood NSW - Sydney North Coast	Backdoor 4 NSW - Newcastle	Box Head NSW - Newcastle	Backdoor 4 NSW - Newcastle	Backdoor 4 NSW - Newcastle	Backdoor 4 NSW - Newcastle	Backdoor 4 NSW - Newcastle	Backdoor 4 NSW - Newcastle	Lighthouse Beach Port Macquarie NSW - Port Macquarie	Warriewood NSW - Sydney North Coast	Backdoor 4 NSW - Newcastle	Umina Beach NSW - Newcastle	Umina Beach NSW - Newcastle	Umina Beach NSW - Newcastle	Bondi Beach NSW - Sydney South Coast	Voodoo NSW - Sydney South Coast	Voodoo NSW - Sydney South Coast	Anna Bay-Morna Point NSW - Newcastle	Umina Beach NSW - Newcastle
Rating (10 max)	2	1	1	2	2	1	2	2	2	2	2	2	1	1	1	1	1	1	1	1	2	1
Distance (km)	1	141	141	52	0	37	0	0	0	0	0	238	52	0	37	37	37	73	91	91	72	37
Best forecast wave conditions in Newcastle	JD Reef				JD Reef	Box Head	Copacobana Point	JD Reef	JD Reef	JD Reef	Shallows			Umina Point	Umina Point	Umina Point	Umina Point				Anna Bay-Morna Point	Anna Bay-Morna Point
Rating (10 max)	2				2	1	2	2	2	2	2			1	1	1	1				2	2
Best forecast wave conditions in Australia	Surfers Point WA - Margaret River	Cyclops WA - Far South	Cyclops WA - Far South	Quarantine VIC - Mornington Peninsula	Quarantine VIC - Mornington Peninsula	Luna Park VIC - Far West	Luna Park VIC - Far West	Cyclops WA - Far South	Cyclops WA - Far South	Shipstern Bluff TAS - East Coast	Ethel Wreck SA - Yorke Peninsula	Ethel Wreck SA - Yorke Peninsula	Cyclops WA - Far South	Luna Park VIC - Far West	Ethel Wreck SA - Yorke Peninsula	Ethel Wreck SA - Yorke Peninsula	Ethel Wreck SA - Yorke Peninsula	Ethel Wreck SA - Yorke Peninsula	Dirk Hartog Island WA - North West	Luna Park VIC - Far West	Ethel Wreck SA - Yorke Peninsula	Easter Reef VIC - Far West
Rating (10 max)	5	4	4	4	4	4	4	4	4	4	4	4	4	5	4	4	4	4	7	4	3	4
Header Global	Chameau Mauritius	Chameau Mauritius	Ilot Sancho Mauritius	Chameau Mauritius	Chameau Mauritius	Chameau Mauritius	Chameau Mauritius	Ilot Sancho Mauritius	Hell South Africa	Hell South Africa	Trial Harbour Australia	Baboon Point South Africa	Trial Harbour Australia	Easter Reef Australia	Trial Harbour Australia	Trial Harbour Australia	Red Bluff Australia	Koodhoo Maldives	Steep Point Australia	Nugget Point New Zealand	Papatowai New Zealand	Papatowai New Zealand
Rating (10 max)	7	7	7	5	5	5	5	5	5	5	6	4	6	5	5	5	5	5	9	7	9	7

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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Backdoor 4 48 hour detailed Surf Forecast

How big are the waves at Backdoor 4 today (16 Aug):

Short Range Forecast

Latest Updates

Summer's Short. Life Is Long.

Roadsurfing in the Basque country

Six Sun-Soaked Summer Surf Spots: Backed by 20 years of Swell and Wind Stats (and with our 20% Summer Subscription Sale)

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How Our WaveFinder Tool Makes Forecasting Easier Than Ever Before

FREE! Surf-Forecast.com widget for your website