Waimanu Bay Surf Forecast

/ HAW – Big Island (60 breaks) / Hawaii (267 breaks) /

USA (1297 breaks) / Lat Long: (20.15° N 155.64° W)

Surf Forecasts:

Waimanu Bay surfForecast / HAW – Big Island / USA

48hr Weather and Surf, issued 1 am Thursday 18 Sep 2025 HST

Forecast update in hr min s Forecast update imminent

Waimanu Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Waimanu Bay sea temperature is 26.8° C
(Which is normal for this time of year)

How big are the waves at Waimanu Bay today?

The current surf forecast for Waimanu Bay at 3AM is: 1.5m 6s primary swell from a East direction and 0.4m 9s secondary swell from a North-northwest direction, 0.1m 7s secondary swell from a North direction (forecast issued at 01:00am September 18). The wind direction is predicted to be cross-shore.

Time (HST) & Date	Wave Height	Wave Period
Morning (18 Sep)	5ft (1.5m)	6s
Afternoon (18 Sep)	5ft (1.6m)	5s
Evening (18 Sep)	4ft (1.2m)	7s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

		Thursday 18								Friday 19								Saturday 20
	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	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 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 (?)	E	E	E	E	E	E	E	E	E	E	N	E	N	ENE	N	N	NE	NNE	NNE	N	ENE	ENE	ENE	NE
Period(s) (?)	5	6	6	6	5	5	5	7	7	7	12	7	11	7	11	11	8	8	8	8	8	8	8	8
Wave Graph (?)
kJ (?)	120	170	170	171	121	115	136	153	116	96	98	97	87	114	112	110	106	117	86	57	278	228	191	205
Wind (km/h)	E	E	E	E	E	ENE	E	E	E	E	E	E	ENE	ENE	ENE	E	E	E	E	E	ENE	ENE	ENE	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross	cross	cross	cross	cross- on	cross- on	cross- on	cross- on	cross	cross	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on
High Tide / height (m)		12:43AM 0.52				1:22PM 0.87				1:23AM 0.59				1:51PM 0.86				1:59AM 0.66					2:17PM 0.83
Low Tide / height (m)				6:24AM 0.16				7:56PM 0.24				7:10AM 0.16					8:15PM 0.21			7:51AM 0.17

		Thursday 18								Friday 19								Saturday 20
Sunrise	-	-	-	6:09	-	-	-	-	-	-	-	6:09	-	-	-	-	-	-	-	6:09	-	-	-	-
Sunset	-	-	-	-	-	-	6:22	-	-	-	-	-	-	-	6:21	-	-	-	-	-	-	-	6:20	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1	1	1	-	1	1	1	1	1
Temp. °C	25	24	24	26	27	27	27	26	25	25	25	26	27	27	26	26	25	25	25	26	27	27	26	25
Feels °C (?)	24	23	22	24	25	26	27	26	25	26	25	25	26	27	26	27	26	26	26	26	27	28	26	25

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

Recent Eyeball Surf Reports for HAW - Big Island

Wind Update Continuing clean conditions at Waimanu Bay (calm at Kapulena wx 12 km from Waimanu Bay). 1.5m 7s swell from the E with a 0.4m 9s swell from the N. 2 swells combining to make bigger set waves.
1 hour 25 minutes ago Waimanu Bay

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1 h 25 min ago

2 km/h

Clean

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