Avalanche 48 hour detailed Surf Forecast

Lat Long: 21.59° N 158.12° W

Issued: 1 am 18 Jul 2026 (local time)

Forecast update in hr min

Today's Avalanche sea temperature is

26.3° C

Avalanche 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 Avalanche today (18 Jul):

Morning surf: Morning surf (18 Jul, local time) - 1.5ft (0.5m), 13s period with W swell.
Afternoon surf: Afternoon surf (18 Jul, local time) - 1.5ft (0.4m), 13s period with WNW swell.
Evening surf: Evening surf (18 Jul, local time) - 1.5ft (0.5m), 8s period with NNE swell.

The current surf forecast for Avalanche at 7AM is: 0.5m 13s primary swell from a West direction (forecast issued at 01:00am July 18). An open ocean swell of 0.7m 14s is not directed at the surf break, a second open ocean swell of 1.0m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (HST) & Date	Wave Height	Wave Period
Morning (18 Jul)	1.5ft (0.5m)	13s
Afternoon (18 Jul)	1.5ft (0.4m)	13s
Evening (18 Jul)	1.5ft (0.5m)	8s

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

	Short Range Forecast Mostly dry. Warm (max 27°C on Sat afternoon, min 24°C on Sat night). Wind will be generally light.
	Saturday 18								Sunday 19								Monday 20
	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)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	0	0
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	W 13	W 13	W 13	WNW 13	WNW 13	NE 7	NNE 8	NE 8	NE 7	WNW 12	NE 7	NE 7	NE 7	NE 6	NE 6	NE 7	NE 7	NE 7	NE 7	NE 7	NE 7	NE 7	NE 7	NE 7
Wave Graph
kJ	90	87	87	57	57	107	37	94	89	29	57	73	73	45	58	65	65	65	65	52	89	102	82	67
Wind (km/h)	E	E	E	E	ENE	ENE	ENE	ENE	ENE	E	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	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			6:34AM0.28m				6:07PM0.44m				7:43AM0.32m				6:39PM0.37m					8:56AM0.36m			7:10PM0.29m
Low Tide	11:33PM0.02m			10:35AM0.13m					00:06AM0.02m				11:50AM0.19m				00:38AM0.03m				1:37PM0.23m


	—	5:58	—	—	—	—	—	—	—	6:00	—	—	—	—	—	—	—	6:00	—	—	—	—	—	—
	—	—	—	—	—	7:16	—	—	—	—	—	—	—	7:16	—	—	—	—	—	—	—	7:15	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Temp °C	25	25	25	26	27	26	24	24	24	24	24	26	27	26	25	24	24	24	25	26	27	26	24	24
Feels °C	26	25	24	25	26	25	24	24	24	24	23	26	26	25	24	24	24	24	25	26	27	26	24	24
Swell 1 Height (m) Direction Period (s)	NE 7	SSW 14	SSW 14	SSW 13	SSW 14	SSW 14	SSW 14	SSW 14	SSW 12	SSW 12	S 12	SSW 13	SSW 13	S 13	S 13	SSW 11	SSW 11	NE 7	NE 7	S 13	S 16	S 16	S 13	S 15
kJ	55	143	195	141	210	210	210	210	121	115	73	125	92	126	126	74	71	65	65	121	329	325	119	165
Swell 2 Height (m) Direction Period (s)	SSW 14	W 13	W 13	NNE 7	NNE 7	SSE 9	NNE 8	SSE 9	SSE 9	ENE 8	SE 8	SE 6	SE 6	S 19	S 18	SSE 18	S 18	S 17	S 16	S 16	SW 18	SW 18	S 16	S 13
kJ	189	87	87	28	38	29	37	32	31	19	18	10	9	110	102	106	154	154	198	193	82	80	181	85
Swell 3 Height (m) Direction Period (s)	W 13	SW 15	SW 15	WNW 13	WNW 13	WNW 13	SSE 9	WNW 13	WNW 12	WNW 12	WNW 12	W 12	S 19	SE 6	SE 5	SE 5	SW 19	SSW 12	SSW 12	SW 18	W 12	W 12	SW 18	SW 17
kJ	90	57	33	57	57	57	31	55	51	29	28	25	65	8	7	7	92	54	53	83	11	11	78	70
Wind waves Height (m) Direction Period (s)	—	NE 7	ENE 7	ENE 7	ENE 7	NE 7	ENE 8	NE 8	NE 7	NE 6	NE 7	NE 7	NE 7	NE 6	NE 6	NE 7	NE 7	—	E 8	NE 7	NE 7	NE 7	NE 7	NE 7
kJ	—	65	99	48	51	107	81	94	89	33	57	73	73	45	58	65	65	—	127	52	89	102	82	67
Nearest Offshore or Glassy	Avalanche 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	Yokohama Bay HAW - Oahu	Off the Wall/Insanities HAW - Oahu	Yokohama Bay HAW - Oahu	Off the Wall/Insanities HAW - Oahu	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu	Ranches HAW - Oahu	Keaau HAW - Oahu	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu	Off the Wall/Insanities HAW - Oahu	Keaau HAW - Oahu	Avalanche HAW - Oahu	Avalanche HAW - Oahu	Avalanche HAW - Oahu	Yokohama Bay HAW - Oahu	Yokohama Bay HAW - Oahu
Rating (10 max)	1	2	2	2	2	2	1	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Distance (km)	0	14	14	14	14	14	8	14	8	14	8	14	14	16	16	14	14	8	16	0	0	0	14	14
Best forecast wave conditions in Oahu	Ranches	Maili Point	Maili Point	Maili Point	Maili Point	Maili Point	Off the Wall/Insanities	Ko Olina Resort	Ranches	Ko Olina Resort	Ranches	Ranches	Ranches	Ranches	Ranches	Ranches	Ranches	Ranches	Ranches	Ranches	Ranches	Ranches	Ranches	Ranches
Rating (10 max)	1	2	2	2	2	2	1	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Best forecast wave conditions in United States	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Waiaha Rivermouth / Honls HAW - Big Island	Steamer Lane-Middle Peak CAL - Santa Cruz	Gale Point CAL - Humboldt	Steamer Lane-The Point CAL - Santa Cruz	Moonstone Beach CAL - Humboldt	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Ranches HAW - Oahu	Ranches HAW - Oahu	Ranches HAW - Oahu	Ranches HAW - Oahu	Boners CAL - San Luis Obispo	Boners CAL - San Luis Obispo	Boners CAL - San Luis Obispo	Boners CAL - San Luis Obispo	Ranches HAW - Oahu	Ranches HAW - Oahu	Ranches HAW - Oahu	Super Tubes CAL - Ventura	Ghost Tree CAL - Monterey	Mouse Rock CAL - San Luis Obispo
Rating (10 max)	3	3	2	2	3	3	3	3	3	3	1	1	1	1	3	3	3	3	1	1	1	2	3	3
Header Global	Seconds (White Rock) New Zealand	Seconds (White Rock) New Zealand	Papatowai New Zealand	Papatowai 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	Otago Peninsula - Allans Beach New Zealand	Dinner Plates New Zealand	White Rock - The Spit New Zealand	Humenga Point New Zealand	Last Chance New Zealand	Diners Beach New Zealand	Diners Beach New Zealand	Angourie Point Australia	Asu Indonesia	Asu Indonesia	Beach Road South Africa
Rating (10 max)	7	6	6	6	6	6	7	7	7	7	7	7	5	5	5	7	5	5	5	5	4	4	4	4

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

Latest Updates

Ben Mondy

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Avalanche surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

Avalanche 48 hour detailed Surf Forecast

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

Short Range Forecast

Latest Updates

How Our WaveFinder Tool Makes Forecasting Easier Than Ever Before

The Five Best Forecasts For International Surfing Day 2026

Best Surf Travel Deals & Discounts For 2026 To Help Make Surf Travel Cheaper

Let Our Surf Alerts Do All Your Forecast Heavy Lifting

Talking To Maddie Meddings on New Film Undercurrents. (And Then Watch It!)

FREE! Surf-Forecast.com widget for your website