Ammonias Surf Forecast

/ HAW – Kaua'i (25 breaks) / Hawaii (267 breaks) /

USA (1297 breaks) / Lat Long: (21.95° N 159.35° W)

Surf Forecasts:

Ammonias surfForecast / HAW – Kaua'i / USA

48hr Weather and Surf, issued 1 pm Sunday 31 Aug 2025 HST

Forecast update in hr min s Forecast update imminent

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

Today's Ammonias sea temperature is 27.4° C
(Which is slightly warmer than usual)

How big are the waves at Ammonias today?

The current surf forecast for Ammonias at 4PM is: 0.7m 10s primary swell from a Southeast direction and 0.5m 7s secondary swell from a East-northeast direction (forecast issued at 01:00pm August 31). An open ocean swell of 0.4m 8s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (HST) & Date	Wave Height	Wave Period
Morning (31 Aug)	2.5ft (0.7m)	10s
Afternoon (31 Aug)	2.5ft (0.7m)	10s
Evening (31 Aug)	2.5ft (0.7m)	9s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Sunday 31					Monday 01								Tuesday 02								Wednesday 03
	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	2 AM	5 AM	8 AM
Rating (10 max)	0	0	0	0	0	1	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 (?)	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SSE	SE	S	SE	SSE	SSE	SSE	SE	SE	SE	SE	SSE	SSE	SSE
Period(s) (?)	10	10	10	9	9	10	10	10	10	8	9	9	16	9	9	8	8	8	8	8	8	7	7	7
Wave Graph (?)
Energy (?)	183	181	178	191	175	147	147	195	155	91	128	173	217	170	208	191	97	151	155	76	81	58	48	48
Wind (km/h)	ENE	ENE	E	ENE	NE	NNE	ENE	E	E	E	ENE	ENE	E	ENE	ENE	ENE	E	E	ENE	ENE	E	E	ENE	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross- on	cross- on	cross	cross- off	cross	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross	cross- on	cross- on	cross- on	cross- on
High Tide / height (m)		11:19AM 0.53								12:17PM 0.57				11:40PM 0.20				1:02PM 0.60				12:35AM 0.23
Low Tide / height (m)							3:17AM 0.12						9:12PM 0.19		4:42AM 0.10						8:53PM 0.18			5:47AM 0.08

	Sunday 31					Monday 01								Tuesday 02								Wednesday 03
Sunrise	-	-	-	-	-	-	-	6:20	-	-	-	-	-	-	-	6:20	-	-	-	-	-	-	-	6:20
Sunset	-	-	6:54	-	-	-	-	-	-	-	6:53	-	-	-	-	-	-	-	6:52	-	-	-	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	1	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	27	27	26	26	25	25	25	25	26	26	26	25	25	24	24	25	26	26	26	25	25	25	24	25
Feels °C (?)	29	29	28	29	28	27	28	27	27	27	27	26	26	25	25	26	26	26	27	26	26	26	24	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 - Kaua'i

Wind Update The wind is still cross-on at Ammonias (light winds from the ENE at BUOY-NWWH1 0 km from Ammonias). 0.7m 9s swell from the SSE with a 0.5m 8s swell from the ENE and a 0.4m 13s groundswell from the SSW. 3 swells combining to make bigger set waves.
57 minutes ago Ammonias

Expand

View all

Actual: 57 min ago

18 km/h

ENE

Cross-On

Please reload the page to see if there are any updates.

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 Ammonias 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.