- Forecast
- Maps
- Live
- Weather State
- Spot Information
Ammonias Surf Forecast
/ HAW – Kaua'i (25 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Ammonias surfForecast / HAW – Kaua'i / USA
48hr Weather and Surf, issued 1 am Monday 20 Apr 2026 HSTForecast 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
24.9° C
(Which is slightly warmer than usual)How big are the waves at Ammonias today?
The current surf forecast for Ammonias at 8AM is: 0.5m 6s primary swell from a East direction (forecast issued at 01:00am April 20). An open ocean swell of 0.5m 7s is not directed at the surf break, a second open ocean swell of 0.5m 13s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Apr) | 1.5ft (0.5m) | 6s |
| Afternoon (20 Apr) | 1.5ft (0.5m) | 12s |
| Evening (20 Apr) | 1.5ft (0.5m) | 7s |
Table - waves today at Ammonias. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||||||||||
| 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) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 11 | 6 | 6 | 12 | 12 | 12 | 7 | 7 | 12 | 11 | 11 | 11 | 11 | 13 | 14 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 25 | 40 | 19 | 18 | 75 | 75 | 75 | 26 | 25 | 44 | 43 | 42 | 41 | 41 | 84 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 24 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | glass | glass | cross- on | on | glass | glass | glass | glass | glass | glass | cross- on | glass | glass | cross | cross- off | cross- off | cross | cross | cross- on | cross- on | cross | cross |
High Tide / height (m) | 4:41AM 0.16 | 6:55PM 0.62 | 5:17AM 0.13 | 8:01PM 0.59 | 6:46AM 0.10 | |||||||||||||||||||
Low Tide / height (m) | 1:14AM 0.11 | 10:52AM -0.09 | 2:57AM 0.12 | 11:37AM -0.06 | 5:05AM 0.10 | 12:36PM -0.01 | ||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:13 | - | - | - | - | - | - | - | 6:13 | - | - | - | - | - | - | - | 6:11 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:59 | - | - | - | - | - | - | - | 6:59 | - | - | - | - | - | - | - | 6:59 | - |
 |  | |  |  | | | | | | | | |  |  | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - |
| Temp. °C | 23 | 23 | 24 | 25 | 26 | 25 | 25 | 25 | 24 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 24 | 24 | 24 | 23 |
| Feels °C (?) | 25 | 25 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 26 | 25 | 25 | 24 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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.
Nearest