Backdoor 48 hour detailed Surf Forecast

Lat Long: 21.67° N 158.05° W

Issued: 1 am 21 Oct 2026 (local time)

Forecast update in hr min

Today's Backdoor sea temperature is

26.7°C

Backdoor 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 today (21 Oct):

Morning surf: Morning surf (21 Oct, local time) - 1ft (0.3m), 9s period with N swell.
Afternoon surf: Afternoon surf (21 Oct, local time) - 1ft (0.3m), 12s period with NW swell.
Evening surf: Evening surf (21 Oct, local time) - 1ft (0.3m), 12s period with NW swell.

The current surf forecast for Backdoor at 7AM is: 0.3m 9s primary swell from a North direction and 0.3m 9s secondary swell from a Northwest direction (forecast issued at 01:00am October 21). An open ocean swell of 1.9m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (HST) & Date	Wave Height	Wave Period
Morning (21 Oct)	1ft (0.3m)	9s
Afternoon (21 Oct)	1ft (0.3m)	12s
Evening (21 Oct)	1ft (0.3m)	12s

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

	Short Range Forecast Mostly dry. Warm (max 26°C on Wed morning, min 24°C on Wed night). Wind will be generally light.
	Wednesday 21								Thursday 22								Friday 23
	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	2	2	1	0	0	0	0
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	N 10	NNW 10	N 9	NW 13	NW 12	NW 12	NW 12	NW 12	NW 12	NW 12	NW 11	NW 13	NW 11	NW 11	NW 12	NW 12	NW 12	NW 12	NE 8	NW 11	NW 11	NW 11	NW 11	NW 11
Wave Graph
kJ	30	31	16	25	24	24	23	37	51	47	60	44	59	77	114	139	139	134	121	119	116	114	114	112
Wind (km/h)	E	E	ENE	E	E	E	E	E	E	E	E	E	ENE	ENE	ENE	E	E	E	ENE	ENE	NE	ENE	ENE	ENE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off	cross-off
High Tide	00:05AM0.40m				11:38AM0.62m				00:36AM0.48m				12:02PM0.60m				1:08AM0.57m				12:25PM0.57m
Low Tide		4:53AM0.28m					6:32PM0.20m				5:54AM0.29m				6:41PM0.16m				6:49AM0.29m				6:55PM0.11m


	—	6:30	—	—	—	—	—	—	—	6:30	—	—	—	—	—	—	—	6:31	—	—	—	—	—	—
	—	—	—	—	—	6:01	—	—	—	—	—	—	—	6:01	—	—	—	—	—	—	—	6:00	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Temp °C	24	24	25	26	26	25	25	24	24	24	25	26	25	25	24	24	24	24	24	25	26	25	24	24
Feels °C	22	21	23	24	24	23	24	22	23	24	25	26	25	25	24	24	25	25	25	25	26	25	24	24
Swell 1 Height (m) Direction Period (s)	N 10	NNW 10	N 9	N 9	N 9	N 9	N 9	NW 12	NW 12	NW 12	NW 11	NW 11	NW 11	NW 11	NW 12	NW 12	ENE 8	NE 8	NE 8	ENE 8	ENE 8	NW 11	NW 11	ENE 8
kJ	30	31	16	15	14	14	14	37	51	47	60	42	59	77	114	139	154	114	116	142	145	114	114	142
Swell 2 Height (m) Direction Period (s)	NW 9	NW 9	NW 9	NW 13	NW 12	NW 12	NW 12	N 9	N 9	N 8	N 8	NW 13	E 13	E 14	E 14	ESE 8	NW 12	NW 12	NW 11	NW 11	NW 11	NE 12	NE 12	NW 11
kJ	13	13	12	25	24	24	23	14	13	12	12	44	31	32	33	12	139	134	121	119	116	68	65	112
Swell 3 Height (m) Direction Period (s)	SSW 16	SSW 16	SSW 16	SSW 16	SSW 15	SSW 15	SSW 15	SSW 15	SSW 15	SSW 14	SSW 14	N 8	SSW 14	SSW 14	SSW 13	NE 14	ESE 8	E 8	E 8	NE 13	NE 12	E 13	E 13	NE 11
kJ	24	24	24	24	22	21	21	21	21	21	21	12	19	18	18	33	19	41	29	83	72	54	53	58
Wind waves Height (m) Direction Period (s)	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 7	—	—	—	—	—	ENE 8	ENE 8	—
kJ	464	408	422	383	383	331	331	310	310	244	244	204	176	176	186	157	—	—	—	—	—	145	145	—
Nearest Offshore or Glassy	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu	Off the Wall/Insanities HAW - Oahu	Banzai Pipeline and Backdoor HAW - Oahu	Off the Wall/Insanities HAW - Oahu	Pipeline HAW - Oahu	Banzai Pipeline and Backdoor HAW - Oahu	Off the Wall/Insanities HAW - Oahu	Off the Wall/Insanities HAW - Oahu	Off the Wall/Insanities HAW - Oahu	Off the Wall/Insanities HAW - Oahu	Backdoor HAW - Oahu	Backdoor HAW - Oahu	Backdoor HAW - Oahu	Chuns and Jocks Reefs HAW - Oahu	Klausmeyers HAW - Oahu	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu
Rating (10 max)	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	1	2	2	2
Distance (km)	24	24	24	24	24	24	24	2	2	2	0	2	2	2	2	2	0	0	0	6	28	24	24	24
Best forecast wave conditions in Oahu	Ranches	Ranches	Maili Point	Ranches	Maili Point	Ranches	Ranches	Ranches	Ranches	Tennis Courts	Tennis Courts	Waimea Bay/Pinballs	Jockos Point	Ranches	Ranches	Jockos Point	Pipeline	Waimea Bay/Pinballs	Waimea Bay/Pinballs	Jockos Point	Bomboras	Tracks (Nanakuli)	The Cove	Tennis Courts
Rating (10 max)	1	1	1	1	1	1	1	1	1	2	2	1	2	1	1	2	2	2	2	2	1	2	2	2
Best forecast wave conditions in United States	Cortez Bank CAL - San Diego County	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Ghost Tree CAL - Monterey	Hilo Breakwall HAW - Big Island	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Boners CAL - San Luis Obispo	Fullers CAL - Monterey	The Wedge CAL - Orange County	Super Tubes CAL - Ventura	Mavericks CAL - San Mateo	Ghost Tree CAL - Monterey	Fullers CAL - Monterey	Super Tubes CAL - Ventura	Ghost Tree CAL - Monterey	Ghost Tree CAL - Monterey
Rating (10 max)	4	4	3	3	3	3	3	3	3	3	3	2	3	3	3	3	2	2	3	4	4	2	4	4
Header Global	Lucky Point Philippines	Lucky Point Philippines	Lucky Point Philippines	Riet River South Africa	Haga-Haga South Africa	Cintsa West South Africa	Easter Reef Australia	Easter Reef Australia	Benkunqut Indonesia	Batu Hiu Indonesia	Benkunqut Indonesia	Bali Village Indonesia	Bali Village Indonesia	Benkunqut Indonesia	Bawa Indonesia	Benkunqut Indonesia	Benkunqut Indonesia	Benkunqut Indonesia	Bali Village Indonesia	Bali Village Indonesia	Bali Village Indonesia	Inishcrone Ireland	Deba Spain	Outside Corner Indonesia
Rating (10 max)	9	9	9	9	7	5	5	5	5	5	6	6	6	5	5	5	5	5	5	5	5	5	5	5

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 48 hour detailed Surf Forecast

How big are the waves at Backdoor today (21 Oct):

Short Range Forecast

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