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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 pm Wednesday 20 May 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
25.2° C
(Which is normal for this time of year)How big are the waves at Ammonias today?
The current surf forecast for Ammonias at 8PM is: 2.2m 8s primary swell from a East-northeast direction and 0.6m 14s secondary swell from a South-southwest direction, 0.3m 18s secondary swell from a South direction (forecast issued at 01:00pm May 20). The wind direction is predicted to be cross-shore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 6ft (1.8m) | 8s |
| Afternoon (20 May) | 6ft (1.9m) | 8s |
| Evening (20 May) | 7ft (2.2m) | 8s |
Table - waves today at Ammonias. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 8mm), mostly falling on Fri night. Warm (max 25°C on Wed afternoon, min 22°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||||||
Wed 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | |
404 | 438 | 460 | 599 | 702 | 782 | 807 | 878 | 827 | 827 | 893 | 1071 | 1173 | 1150 | 1124 | 1048 | 1003 | 858 | 867 | 899 | 870 | 782 | 891 | 850 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | |
High Tide | 7:36PM0.62m | 7:44AM0.13m | 8:32PM0.57m | 9:38AM0.17m | 9:27PM0.51m | |||||||||||||||||||
Low Tide | 11:26AM-0.04m | 3:37AM0.08m | 12:26PM0.03m | 4:25AM0.06m | 1:41PM0.10m | 5:01AM0.04m | ||||||||||||||||||
 | | |  |  | | |  |  | | | |  | | | | | | |  | | | | | |
 | — | — | — | — | — | — | 5:56 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — |
 | — | — | 7:10 | — | — | — | — | — | — | — | 7:12 | — | — | — | — | — | — | — | 7:12 | — | — | — | — | 7:13 |
1 | 1 | 1 | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | |
Temp °C | 25 | 25 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 23 | 23 | 23 | 22 | 23 | 24 | 24 | 23 | 23 | 23 | 22 | 23 | 23 |
24 | 24 | 22 | 22 | 21 | 21 | 20 | 20 | 21 | 21 | 21 | 19 | 19 | 20 | 18 | 19 | 20 | 21 | 19 | 19 | 20 | 19 | 20 | 20 | |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | S 16 | S 16 | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | S 15 | S 15 | SSE 12 | SE 12 | S 14 | S 17 | S 16 | S 16 | S 16 |
 kJ | 165 | 179 | 152 | 145 | 104 | 101 | 102 | 134 | 134 | 134 | 129 | 163 | 157 | 157 | 157 | 155 | 109 | 94 | 71 | 93 | 147 | 188 | 185 | 183 |
Swell 2 Height (m) Direction Period (s) | NNW 11 | NNW 11 | NNW 11 | S 18 | SSW 17 | SSW 17 | S 16 | SSW 13 | SSW 14 | SSW 14 | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | S 14 | S 14 | S 18 | SSW 13 | S 13 | S 13 | SSW 13 |
| kJ | 41 | 39 | 23 | 56 | 101 | 93 | 137 | 70 | 61 | 66 | 44 | 43 | 43 | 42 | 40 | 38 | 37 | 103 | 94 | 97 | 60 | 90 | 92 | 58 |
Swell 3 Height (m) Direction Period (s) | SE 7 | SSW 18 | SSW 18 | NNW 11 | SE 7 | SE 14 | SE 14 | SE 14 | SE 14 | SE 13 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | NNW 10 | S 18 | S 18 | S 18 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 |
| kJ | 14 | 63 | 62 | 23 | 13 | 51 | 51 | 50 | 46 | 44 | 28 | 14 | 14 | 14 | 29 | 10 | 102 | 98 | 154 | 37 | 37 | 36 | 35 | 35 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 404 | 438 | 460 | 599 | 702 | 782 | 807 | 878 | 827 | 827 | 893 | 1071 | 1173 | 1150 | 1124 | 1048 | 1003 | 858 | 867 | 899 | 870 | 782 | 891 | 850 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 16 | 33 | 126 | 31 | 301 | 301 | 46 | 38 | 38 | 300 | 3751 | 301 | 419 | 31 | 31 | 31 | 31 | 33 | 31 | 31 | 31 | 31 | 31 | 31 |
Best forecast wave conditions in Kaua'i | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Ocean Swells (m)- Wind Speed (km/h)
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