Castles Beach 48 hour detailed Surf Forecast

Lat Long: 21.42° N 157.74° W

Issued: 1 am 15 Sep 2026 (local time)

Forecast update in hr min

Today's Castles Beach sea temperature is

27.2°C

Castles Beach 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 Castles Beach today (15 Sep):

Morning surf: Morning surf (15 Sep, local time) - 2.5ft (0.8m), 5s period with ENE swell.
Afternoon surf: Afternoon surf (15 Sep, local time) - 1.5ft (0.4m), 12s period with E swell.
Evening surf: Evening surf (15 Sep, local time) - 2ft (0.6m), 8s period with NNE swell.

The current surf forecast for Castles Beach at 6AM is: 0.2m 21s primary swell from a South-southwest direction and 0.6m 8s secondary swell from a North-northeast direction, 0.3m 13s secondary swell from a East direction, 0.8m 4s secondary swell from a East-northeast direction (forecast issued at 01:00am September 15). The wind direction is predicted to be cross-onshore.

Time (HST) & Date	Wave Height	Wave Period
Morning (15 Sep)	2.5ft (0.8m)	5s
Afternoon (15 Sep)	1.5ft (0.4m)	12s
Evening (15 Sep)	2ft (0.6m)	8s

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

	Short Range Forecast Moderate rain (total 17mm), heaviest on Thu night. Warm (max 26°C on Tue morning, min 25°C on Tue morning). Mainly fresh winds.
	Tuesday 15								Wednesday 16								Thursday 17
	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	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	NE 8	NNE 8	ENE 5	NNE 8	E 12	NE 8	NNE 8	ENE 5	E 5	E 11	ENE 6	NE 6	NE 6	NE 6	NE 6	NE 6	NE 6	NE 7	NE 7	ENE 7	ENE 10	ENE 9	E 9	ENE 9
Wave Graph
kJ	65	56	36	51	45	111	39	56	69	59	109	95	98	114	148	171	216	244	313	455	782	660	521	708
Wind (km/h)	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	NE	ENE	NE	NE	NE	NE	NE	NE	ENE	ENE	ENE	ENE	E	E
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	on	cross-on	cross-on	on	cross-on	on	on	on	on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	on	on	on	on
High Tide			5:15AM0.70m			3:27PM0.55m					6:09AM0.67m			3:00PM0.53m					7:35AM0.64m
Low Tide					11:06AM0.45m			10:26PM0.15m					12:06PM0.50m			10:52PM0.18m


	—	6:16	—	—	—	—	—	—	—	6:18	—	—	—	—	—	—	—	6:18	—	—	—	—	—	—
	—	—	—	—	—	6:34	—	—	—	—	—	—	—	6:32	—	—	—	—	—	—	—	6:31	—	—
mm	—	—	—	—	—	—	—	1	—	—	—	—	—	—	—	1	1	1	1	1	1	2	3	4
Temp °C	25	25	25	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26
Feels °C	27	26	26	28	28	27	27	27	27	27	27	26	26	26	26	26	27	27	27	26	26	26	26	26
Swell 1 Height (m) Direction Period (s)	NE 8	NNE 8	NNE 8	NNE 8	NNE 8	E 12	NNE 8	NNE 8	NNE 8	NNE 7	E 10	E 10	E 10	E 10	E 10	E 10	E 10	E 10	E 10	SSW 16	SW 16	SSW 19	NNE 7	SW 18
kJ	65	56	36	51	39	44	39	39	37	47	53	73	72	73	75	98	71	96	125	25	40	35	94	82
Swell 2 Height (m) Direction Period (s)	NNE 10	E 13	NE 8	E 12	E 12	SSW 20	E 11	E 11	E 11	E 11	SW 18	SW 18	SW 18	SW 18	SW 18	SW 18	SW 17	SW 16	SW 16	SSW 19	SSW 19	SSW 16	SW 17	SE 10
kJ	9	30	16	26	45	37	39	38	37	57	82	80	79	79	79	78	76	69	66	37	37	24	71	4
Swell 3 Height (m) Direction Period (s)	E 13	SSW 21	E 13	SW 20	SSW 20	NE 8	SW 19	SW 19	SW 19	SW 19	SW 12	N 9	N 9	NNE 8	SW 11	SW 11	SW 11	S 11	SE 11	SE 11	S 10	S 10	S 10	NW 12
kJ	14	44	28	60	37	3	59	96	95	90	6	2	7	7	5	5	5	2	5	4	2	2	2	6
Wind waves Height (m) Direction Period (s)	ENE 4	ENE 4	ENE 5	ENE 5	ENE 5	NE 8	ENE 5	ENE 5	E 5	E 5	ENE 6	NE 6	NE 6	NE 6	NE 6	NE 6	NE 6	NE 7	NE 7	ENE 7	ENE 10	ENE 9	E 9	ENE 9
kJ	11	21	24	25	19	111	25	56	69	59	109	95	98	114	148	171	216	244	313	455	782	660	521	708
Nearest Offshore or Glassy	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Paradise HAW - Oahu	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Ko Olina Resort HAW - Oahu	Ko Olina Resort HAW - Oahu	Ko Olina Resort HAW - Oahu	Ko Olina Resort HAW - Oahu	Ko Olina Resort HAW - Oahu	Ko Olina Resort HAW - Oahu	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Ko Olina Resort HAW - Oahu	Sewers (Maili) HAW - Oahu	Nanakuli Blackrocks HAW - Oahu	Ko Olina Resort HAW - Oahu	Ko Olina Resort HAW - Oahu
Rating (10 max)	2	2	2	2	2	2	2	3	3	3	2	2	2	2	2	2	2	2	2	2	1	3	2	3
Distance (km)	18	18	18	18	19	18	18	18	18	18	18	41	41	41	41	41	41	18	18	41	45	41	41	41
Best forecast wave conditions in Oahu	Ranches	Abalolo Reef	Abalolo Reef	Kaena Point	Kaena Point	Kaena Point	Kaena Point	Ranches	Ranches	Ranches	Ranches	Kaena Point	Maili Cloudbreak	Tracks (Nanakuli)	Makaha (Outside)	Makaha (Outside)	Yokohama Bay	Abalolo Reef	Yokohama Bay	Makaha (Outside)	Makaha (Outside)	Kaena Point	Kaena Point	Kaena Point
Rating (10 max)	2	3	3	3	2	2	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3
Best forecast wave conditions in United States	Mouse Rock CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Abalolo Reef HAW - Oahu	Kaena Point HAW - Oahu	Ma'alaea HAW - Maui	Fullers CAL - Monterey	Cojo CAL - Santa Barbara	Ranches HAW - Oahu	Ranches HAW - Oahu	Ranches HAW - Oahu	Ranches HAW - Oahu	Kaalualu Point HAW - Big Island	Gale Point CAL - Humboldt	Cape Sebastian Oregon South	Fullers CAL - Monterey	Moonstone Beach CAL - Humboldt	Swamis CAL - San Diego County	Blacks Beach CAL - San Diego County	Pakalas HAW - Kaua'i	Makaha (Outside) HAW - Oahu	Hilo Breakwall HAW - Big Island	Lincoln City Nelscott Reef Oregon North	Fullers CAL - Monterey	Mouse Rock CAL - San Luis Obispo
Rating (10 max)	3	3	3	3	2	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3
Header Global	Cow Bombie Australia	Gas Bay Australia	Saint Leu Reunion	Saint Leu Reunion	Etang-Sale Reunion	Saint Leu Reunion	Etang-Sale Reunion	Etang-Sale Reunion	Caravan Park/Lamberts Bay South Africa	Etang-Sale Reunion	Etang-Sale Reunion	Cronulla Point Australia	Haapiti French Polynesia	Haapiti French Polynesia	Maraa French Polynesia	Blaketown Wedge New Zealand	Papatowai New Zealand	Easter Reef Australia	Easter Reef Australia	Weld Road New Zealand	Blaketown Wedge New Zealand	Cobden Breakwater New Zealand	Blaketown Wedge New Zealand	Papatowai New Zealand
Rating (10 max)	5	5	6	6	6	5	5	5	5	5	5	5	5	5	5	5	9	5	5	6	5	5	5	7

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

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

Ben Mondy

Summer School: The Timeline of The Boardshort

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 Castles Beach 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.

Castles Beach 48 hour detailed Surf Forecast

How big are the waves at Castles Beach today (15 Sep):

Short Range Forecast

Latest Updates

Road Testing the new Db Surf Roller Pro

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)

Summer School: The Timeline of The Boardshort

FREE! Surf-Forecast.com widget for your website