Coast Guard Surf Forecast

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

USA (1297 breaks)

Surf Forecasts

Coast Guard surfForecast / HAW – Big Island / USA

48hr Weather and Surf, issued 1 am Sunday 10 Aug 2025 HST

Forecast update in hr min s Forecast update imminent

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

Today's Coast Guard sea temperature is 26.5° C
(Which is normal for this time of year)

How big are the waves at Coast Guard today?

The current surf forecast for Coast Guard at 5AM is: 1.2m 11s primary swell from a East-northeast direction (forecast issued at 01:00am August 10). An open ocean swell of 0.7m 15s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.

Time (HST) & Date	Wave Height	Wave Period
Morning (10 Aug)	4ft (1.2m)	10s
Afternoon (10 Aug)	4.5ft (1.4m)	10s
Evening (10 Aug)	4.5ft (1.3m)	9s

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

Hourly 12 Days

Big Island Surf

Print Surf Table

Updates in hr min s Forecast update imminent

		Sunday 10								Monday 11								Tuesday 12
	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	2	2	2	1	2	1	2	2	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	W	W	ENE	ENE	W	W	W	N
Period(s) (?)	8	11	11	10	10	10	10	9	9	9	8	8	8	8	8	7	10	10	7	5	10	10	9	7
Wave Graph (?)
Energy (?)	185	350	343	312	306	354	360	319	275	219	160	153	133	87	230	239	8	8	175	0	2	2	2	4
Wind (km/h)	E	ESE	S	E	NE	ENE	ENE	E	ENE	E	E	E	E	E	ENE	E	E	E	ENE	E	ENE	ENE	ENE	ENE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	off	cross- off	glass	cross	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 / height (m)			3:34AM 0.51				4:12PM 0.89				4:20AM 0.56				4:38PM 0.83					5:10AM 0.59				5:03PM 0.75
Low Tide / height (m)	10:28PM 0.20				9:17AM 0.08				10:51PM 0.18				9:59AM 0.15					11:16PM 0.16			10:45AM 0.23

		Sunday 10								Monday 11								Tuesday 12
Sunrise	-	-	-	6:01	-	-	-	-	-	-	-	6:01	-	-	-	-	-	-	-	6:01	-	-	-	-
Sunset	-	-	-	-	-	-	6:54	-	-	-	-	-	-	-	6:54	-	-	-	-	-	-	-	6:53	-

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

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 Coast Guard (calm at BUOY-KWHH1 24 km from Coast Guard). 0.3m 11s groundswell from the N to make surfable waves.
1 hour 31 minutes ago Coast Guard

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24 km away, 1 h 31 min ago

5 km/h

NNE

0.0

26.5

Air / Water (°C)

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