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Surf Forecasts:
Ammonias surfForecast / HAW – Kaua'i / USA
48hr Weather and Surf, issued 7 pm Tuesday 16 Dec 2025 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
25.5° C
(Which is slightly warmer than usual)How big are the waves at Ammonias today?
The current surf forecast for Ammonias at 1AM is: 1.1m 7s primary swell from a Southeast direction (forecast issued at 07:00pm December 16). An open ocean swell of 1.2m 13s is not directed at the surf break, a second open ocean swell of 1.2m 10s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 3ft (0.9m) | 7s |
| Afternoon (17 Dec) | 3ft (0.9m) | 7s |
| Evening (17 Dec) | 3ft (0.9m) | 6s |
Table - waves today at Ammonias. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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 | 11 AM | 2 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 10 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 9 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 76 | 231 | 91 | 118 | 88 | 76 | 76 | 76 | 76 | 74 | 69 | 67 | 58 | 55 | 34 | 36 | 39 | 37 | 28 | 18 | 52 | 53 | 45 | 31 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | glass | glass | cross- on | cross | cross- off | glass | glass | glass | cross | cross | cross- on | cross- on |
High Tide / height (m) | 2:44AM 0.65 | 1:28PM 0.20 | 3:16AM 0.67 | 2:07PM 0.19 | 3:49AM 0.68 | |||||||||||||||||||
Low Tide / height (m) | 6:44PM -0.01 | 10:23AM 0.17 | 7:17PM -0.02 | 10:52AM 0.16 | 7:52PM -0.03 | 11:19AM 0.15 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 7:09 | - | - | - | - | - | - | - | 7:09 | - | - | - | - | - | - | - | 7:09 | - | - |
| Sunset | 5:57 | - | - | - | - | - | - | - | 5:57 | - | - | - | - | - | - | - | 5:57 | - | - | - | - | - | - | - |
 |  | | |  | |  | | |  | |  | |  | | | | | | | | | | | |
Rain (mm) | 1 | - | - | - | 1 | 1 | - | 1 | - | - | - | - | - | - | - | 1 | 2 | 2 | 2 | 1 | 1 | 1 | - | - |
| Temp. °C | 25 | 24 | 24 | 24 | 23 | 23 | 24 | 25 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 25 | 24 | 23 | 23 | 22 | 23 | 23 | 24 | 25 |
| Feels °C (?) | 26 | 25 | 25 | 25 | 23 | 23 | 24 | 25 | 24 | 24 | 24 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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