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Surf Forecasts:

Ammonias surfForecast / HAW – Kaua'i / USA

information circle48hr Weather and Surf, issued 1 am Friday 20 Mar 2026 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
24.6° C
 (Which is slightly warmer than usual)

How big are the waves at Ammonias today?

The current surf forecast for Ammonias at 4AM is: 0.8m 13s primary swell from a South direction and 1.0m 5s secondary swell from a South-southeast direction (forecast issued at 01:00am March 20). An open ocean swell of 0.9m 10s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (HST) & DateWave HeightWave Period
Morning (20 Mar)2.5ft (0.8m)13s
Afternoon (20 Mar)2.5ft (0.7m)13s
Evening (20 Mar)2.5ft (0.7m)12s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Friday
20
Saturday
21
Sunday
22
11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM
Rating
(10 max)
0
0
0
0
0
0
1
2
1
1
0
0
0
0
1
0
0
0
0
0
1
1
1
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.8
S
0.8
S
0.8
S
0.8
S
0.8
S
0.7
S
0.7
S
0.7
S
0.6
S
0.6
S
0.6
S
0.8
S
0.7
SSW
0.7
SSW
0.8
SSW
0.7
SW
0.8
SSW
0.7
SSW
0.9
S
0.8
S
0.7
SSW
0.7
SSW
0.7
SSW
0.7
SSW
Period(s) (?)131313131313131212121251818181818175516161616
Wave
Graph
(?)Metric surfscale
Energy kJ (?)222222222219215162157150109109107372802763993163482614534229226223223
Wind
(km/h)
15
S
20
SSW
15
SSW
20
SSW
20
SSW
20
SW
10
SW
5
WSW
5
SE
0
SSW
10
SW
15
SW
25
SSW
25
SW
25
SW
20
SW
20
SSW
25
SSW
20
SSW
15
SW
15
SW
15
SW
10
SW
5
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crosscrosscrosscrosscrosscrosscross-
off		glassglasscrosscrosscross-
on		crosscrosscrosscrosscrosscrosscrosscrosscrosscrossglass
High Tide
/ height (m)
4:10AM
0.38
5:17PM
0.52
4:36AM
0.31
6:09PM
0.54
4:59AM
0.25
7:10PM
0.54
Low Tide
/ height (m)
10:30PM
0.05
10:24AM
-0.08
11:29PM
0.09
10:53AM
-0.09
12:38AM
0.14
11:26AM
-0.08
Friday
20
Saturday
21
Sunday
22
Sunrise---6:41-------6:39-------6:39----
Sunset------6:47-------6:47-------6:49-
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
cloud
cloud
part cloud
Rain (mm)
-11112221123112112211---
Temp. °C232424242425252424242324242423232322222324242423
Feels °C (?)242525252425272727282525242322232321222325242526
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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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.

View detailed surf forecast for Ammonias at:
surf-forecast.com

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