Castles Beach 48 hour detailed Surf Forecast

Lat Long: 21.42° N 157.74° W

Issued: 1 am 16 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 (16 Sep):

Morning surf: Morning surf (16 Sep, local time) - 4.5ft (1.3m), 6s period with ENE swell.
Afternoon surf: Afternoon surf (16 Sep, local time) - 4.5ft (1.4m), 6s period with NE swell.
Evening surf: Evening surf (16 Sep, local time) - 5ft (1.6m), 6s period with NE swell.

The current surf forecast for Castles Beach at 4AM is: 1.3m 6s primary swell from a East-northeast direction and 0.5m 11s secondary swell from a East direction (forecast issued at 01:00am September 16). An open ocean swell of 0.4m 19s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (HST) & Date	Wave Height	Wave Period
Morning (16 Sep)	4.5ft (1.3m)	6s
Afternoon (16 Sep)	4.5ft (1.4m)	6s
Evening (16 Sep)	5ft (1.6m)	6s

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

	Short Range Forecast Moderate rain (total 18mm), heaviest on Thu night. Warm (max 27°C on Fri afternoon, min 26°C on Wed morning). Mainly fresh winds.
	Wednesday 16								Thursday 17								Friday 18
	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)	ENE 6	ENE 6	ENE 6	NE 6	NE 6	NE 6	NE 7	NE 6	NE 7	NE 7	ENE 7	ENE 7	ENE 7	ENE 9	ENE 9	E 9	E 9	ENE 8	ENE 8	ENE 8	ENE 8	E 8	E 7	E 7
Wave Graph
kJ	65	107	120	131	152	195	192	255	287	296	342	407	489	721	623	506	494	520	472	484	461	459	411	411
Wind (km/h)	ENE	ENE	ENE	ENE	NE	NE	NE	NE	NE	NE	NE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	E
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	on	on	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	on	cross-on	cross-on	on	on	on	on
High Tide			6:09AM0.67m			3:00PM0.53m					7:35AM0.64m									9:58AM0.64m
Low Tide					12:06PM0.50m			10:52PM0.18m									11:26PM0.21m


	—	6:18	—	—	—	—	—	—	—	6:18	—	—	—	—	—	—	—	6:18	—	—	—	—	—	—
	—	—	—	—	—	6:32	—	—	—	—	—	—	—	6:31	—	—	—	—	—	—	—	6:30	—	—
mm	—	—	—	1	—	1	1	1	—	1	1	1	1	2	3	3	2	—	—	—	—	—	—	—
Temp °C	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	27	26	26	26
Feels °C	27	27	27	27	26	26	26	26	27	26	26	26	26	26	26	26	26	25	25	24	26	25	25	25
Swell 1 Height (m) Direction Period (s)	NNE 7	E 11	E 10	E 10	E 10	E 10	E 10	E 10	E 10	E 10	SW 16	SSW 16	SSW 16	SW 16	SW 17	NNE 6	NNE 7	SW 17	SSW 17	SSW 17	SW 17	SW 17	SSW 16	SSW 16
kJ	37	57	53	51	72	73	75	72	96	94	66	25	25	40	71	53	47	76	119	116	74	70	107	49
Swell 2 Height (m) Direction Period (s)	E 11	SW 19	SW 18	SW 18	SW 18	SW 18	SW 18	SW 18	SW 17	SW 16	S 11	SSW 19	SSW 19	SSW 19	S 10	SW 18	SSW 18	SSW 18	S 10	S 10	S 21	SE 9	SSE 6	SW 16
kJ	37	90	82	80	79	79	79	78	76	69	2	37	37	36	2	83	124	31	2	2	9	3	4	43
Swell 3 Height (m) Direction Period (s)	SW 19	SW 12	SW 12	N 9	N 10	SW 11	SW 11	SW 11	SW 11	S 11	SW 11	SE 11	S 10	SE 10	S 10	S 10	S 10	S 10	NW 11	NW 10	S 9	S 21	SE 8	S 9
kJ	95	6	6	2	7	5	5	5	5	2	5	4	2	4	2	2	2	2	5	4	2	9	3	2
Wind waves Height (m) Direction Period (s)	ENE 6	ENE 6	ENE 6	NE 6	NE 6	NE 6	NE 7	NE 6	NE 7	NE 7	ENE 7	ENE 7	ENE 7	ENE 9	ENE 9	E 9	E 9	ENE 8	ENE 8	ENE 8	ENE 8	E 8	E 7	E 7
kJ	65	107	120	131	152	195	192	255	287	296	342	407	489	721	623	506	494	520	472	484	461	459	411	411
Nearest Offshore or Glassy	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Point Panic 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	Ko Olina Resort HAW - Oahu	Ko Olina Resort HAW - Oahu	Maili Point HAW - Oahu	Nanakuli Blackrocks HAW - Oahu	Ko Olina Resort HAW - Oahu	Ko Olina Resort HAW - Oahu	Ko Olina Resort HAW - Oahu	Nanakuli Blackrocks HAW - Oahu	Keaulanas HAW - Oahu	Maili Point HAW - Oahu	Maili Point HAW - Oahu	Maili Point HAW - Oahu	Maili Point HAW - Oahu	Ko Olina Resort HAW - Oahu
Rating (10 max)	3	2	2	3	2	2	2	2	2	2	2	2	3	3	2	3	3	3	3	3	3	3	3	3
Distance (km)	18	18	18	19	41	41	41	41	41	41	41	41	45	41	41	41	41	41	42	45	45	45	45	41
Best forecast wave conditions in Oahu	Ranches	Ranches	Ranches	Kaena Point	Makaha (Outside)	Pokai Bay	Makaha	Makaha	Yokohama Bay	Yokohama Bay	Makaha (Outside)	Makaha (Outside)	Makaha (Outside)	Kaena Point	Kaena Point	Kaena Point	Kaena Point	Yokohama Bay	Kaena Point	Kaena Point	Kaena Point	Kaena Point	Kaena Point	Kaena Point
Rating (10 max)	3	3	3	3	3	3	3	3	3	2	2	3	3	3	3	3	3	3	3	3	3	3	3	3
Best forecast wave conditions in United States	Ranches HAW - Oahu	Ranches HAW - Oahu	Ranches HAW - Oahu	Kaena Point HAW - Oahu	Makaha (Outside) HAW - Oahu	Cape Sebastian Oregon South	Gale Point CAL - Humboldt	Tarantulas CAL - Santa Barbara	Tijuana Sloughs Baja Norte	Mouse Rock CAL - San Luis Obispo	Ghost Tree CAL - Monterey	Makaha (Outside) HAW - Oahu	Gale Point CAL - Humboldt	Lincoln City Nelscott Reef Oregon North	Trestles (Lowers) CAL - Orange County	Boners CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Trestles (Lowers) CAL - Orange County	Magics HAW - Big Island	Majors Bay HAW - Kaua'i	Gale Point CAL - Humboldt	Magics HAW - Big Island	Cape Sebastian Oregon South	La Push Washington
Rating (10 max)	3	3	3	3	3	3	3	3	3	3	2	3	3	3	3	3	3	3	3	3	3	3	3	3
Header Global	Etang-Sale Reunion	Etang-Sale Reunion	Etang-Sale Reunion	Grindavik Lighthouse ( Hopsnesta) Iceland	Grindavik Antenas Iceland	JD Reef Australia	Blaketown Wedge New Zealand	Fox River New Zealand	Papatowai New Zealand	Anawhata Road (Oaonui) New Zealand	Easter Reef Australia	Graveyards New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Dinner Plates New Zealand	Otago Peninsula - Allans Beach New Zealand	El Huerto Spain	Cathedral Rock Australia	Cathedral Rock Australia	Shingles New Zealand	May's Point Australia	Afife Portugal
Rating (10 max)	5	5	5	5	5	5	5	5	8	5	5	5	8	8	8	7	5	4	5	6	6	5	5	4

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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Castles Beach 48 hour detailed Surf Forecast

How big are the waves at Castles Beach today (16 Sep):

Short Range Forecast

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