Number Fours 48 hour detailed Surf Forecast

Lat Long: 21.28° N 157.83° W

Issued: 1 am 15 Sep 2026 (local time)

Forecast update in hr min

Today's Number Fours sea temperature is

27.3°C

Number Fours 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 Number Fours today (15 Sep):

Morning surf: Morning surf (15 Sep, local time) - 2.5ft (0.7m), 20s period with SW swell.
Afternoon surf: Afternoon surf (15 Sep, local time) - 2.5ft (0.7m), 20s period with SW swell.
Evening surf: Evening surf (15 Sep, local time) - 2.5ft (0.7m), 19s period with SW swell.

The current surf forecast for Number Fours at 9AM is: 0.7m 20s primary swell from a Southwest direction (forecast issued at 01:00am September 15). An open ocean swell of 0.7m 8s is not directed at the surf break, a second open ocean swell of 0.6m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (HST) & Date	Wave Height	Wave Period
Morning (15 Sep)	2.5ft (0.7m)	20s
Afternoon (15 Sep)	2.5ft (0.7m)	20s
Evening (15 Sep)	2.5ft (0.7m)	19s

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

	Short Range Forecast Light rain (total 9mm), mostly falling on Thu night. Warm (max 27°C on Tue morning, min 26°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)	2	1	1	1	1	1	1	1	1	2	0	1	1	1	1	0	1	1	1	2	2	2	2	2
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	SW 21	SSW 21	SW 21	SW 20	SW 20	SW 19	SW 19	SSW 19	SSW 19	SSW 19	SSW 18	SW 18	SW 18	SSW 18	SSW 18	SW 18	SW 17	SSW 16	ENE 7	ENE 10	ENE 10	ENE 9	ENE 9	ENE 9
Wave Graph
kJ	224	302	433	392	388	384	384	480	470	441	404	455	449	541	541	444	429	343	363	782	768	592	579	623
Wind (km/h)	NE	NE	NE	ENE	ENE	ENE	ENE	ENE	ENE	NE	NE	ENE	NE	NE	NE	NE	NE	NE	NE	ENE	ENE	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			7:02AM0.58m				6:07PM0.30m				7:59AM0.57m				6:32PM0.25m					9:10AM0.56m			7:25PM0.21m
Low Tide	11:42PM0.08m					2:03PM0.23m			00:07AM0.11m					4:06PM0.24m			00:38AM0.13m						7:14PM0.21m


	—	6:18	—	—	—	—	—	—	—	6:18	—	—	—	—	—	—	—	6:18	—	—	—	—	—	—
	—	—	—	—	—	6:34	—	—	—	—	—	—	—	6:32	—	—	—	—	—	—	—	6:31	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1	1	2	3
Temp °C	25	25	26	27	27	27	26	26	26	26	26	27	27	27	26	26	26	26	26	27	27	27	26	26
Feels °C	27	26	28	28	28	27	27	26	26	27	26	26	26	26	26	25	26	27	26	26	27	26	26	26
Swell 1 Height (m) Direction Period (s)	SW 21	SSW 21	SW 21	SW 20	NE 8	SW 19	SW 19	SSW 19	SSW 19	SSW 19	SSW 18	SW 18	SW 18	SSW 18	SSW 18	SW 18	SW 17	SSW 16	SSW 16	SW 16	SW 16	SSW 16	SSW 16	SSW 17
kJ	224	302	433	392	82	384	384	480	470	441	404	455	449	541	541	444	429	343	330	258	258	322	458	622
Swell 2 Height (m) Direction Period (s)	SSW 13	SW 13	NNE 8	NNE 8	SW 20	E 12	E 11	NNE 8	NNE 8	E 11	E 10	SW 12	SW 11	E 10	SW 11	SW 11	E 10	SW 11	SW 11	SSW 20	SSW 19	SSW 19	WSW 8	WSW 10
kJ	68	44	56	36	388	68	60	51	32	57	53	35	32	100	31	19	125	19	19	149	212	210	7	9
Swell 3 Height (m) Direction Period (s)	SW 18	E 13	SW 13	E 12	E 12	SW 12	SW 12	E 11	E 11	SW 12	SW 12	S 6	S 8	SW 11	S 8	SE 11	SW 11	SSE 11	SSE 11	SW 11	SW 10	SSW 10	SSW 10	SSW 10
kJ	50	30	42	46	45	38	38	59	58	37	37	3	6	31	5	5	19	12	11	18	16	10	10	10
Wind waves Height (m) Direction Period (s)	NE 8	NE 8	ENE 5	ENE 8	—	NE 8	NE 8	ENE 5	ENE 5	ENE 6	NE 6	ENE 10	ENE 10	NE 5	ENE 6	ENE 6	NE 6	ENE 7	ENE 7	ENE 10	ENE 10	ENE 9	ENE 9	ENE 9
kJ	78	107	18	52	—	71	96	36	51	70	85	314	371	100	170	230	203	269	363	782	768	592	579	623
Nearest Offshore or Glassy	Kaisers HAW - Oahu	Paradise HAW - Oahu	Paradise HAW - Oahu	Paradise HAW - Oahu	Paradise HAW - Oahu	Paradise HAW - Oahu	Paradise HAW - Oahu	Ala Moana Courts HAW - Oahu	Ala Moana Courts HAW - Oahu	Paradise HAW - Oahu	Paradise 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	Maili Cloudbreak 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	3	3	2	3
Distance (km)	0	1	1	1	1	1	1	2	2	1	1	31	31	31	31	31	31	2	2	31	39	33	31	31
Best forecast wave conditions in Oahu	Pipeline	Abalolo Reef	Abalolo Reef	Kaena Point	Kaena Point	Kaena Point	Kaena Point	Ranches	Ranches	Ranches	Ranches	Kaena Point	Maili Point	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)

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Number Fours 48 hour detailed Surf Forecast

How big are the waves at Number Fours today (15 Sep):

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