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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 Thursday 21 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
25.3° C
(Which is normal for this time of year)How big are the waves at Ammonias today?
The current surf forecast for Ammonias at 7PM is: 2.5m 8s primary swell from a East-northeast direction and 0.6m 15s secondary swell from a South direction, 0.4m 13s secondary swell from a Southeast direction (forecast issued at 01:00pm May 21). The wind direction is predicted to be cross-shore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 8ft (2.5m) | 8s |
| Afternoon (21 May) | 8ft (2.5m) | 8s |
| Evening (21 May) | 8ft (2.5m) | 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 afternoon. Warm (max 25°C on Thu afternoon, min 22°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | |
915 | 847 | 844 | 1000 | 1097 | 1150 | 1098 | 1048 | 950 | 905 | 847 | 964 | 891 | 864 | 870 | 800 | 870 | 1099 | 1069 | 965 | 987 | 921 | 857 | 899 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | |
High Tide | 8:32PM0.57m | 9:38AM0.17m | 9:27PM0.51m | 11:10AM0.24m | 10:17PM0.45m | |||||||||||||||||||
Low Tide | 12:26PM0.03m | 4:25AM0.06m | 1:41PM0.10m | 5:01AM0.04m | 3:18PM0.16m | 5:30AM0.02m | ||||||||||||||||||
 | | |  | |  | | | | |  | | |  | | | |  | | | | | | | |
 | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — |
 | — | — | 7:12 | — | — | — | — | — | — | — | 7:12 | — | — | — | — | — | — | — | 7:13 | — | — | — | — | 7:13 |
— | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 | — | — | 1 | — | — | 1 | 1 | 1 | — | 1 | |
Temp °C | 24 | 25 | 24 | 23 | 23 | 23 | 22 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 23 | 22 | 23 |
21 | 22 | 21 | 19 | 19 | 19 | 19 | 19 | 20 | 21 | 20 | 20 | 21 | 20 | 20 | 20 | 19 | 19 | 20 | 19 | 19 | 19 | 19 | 20 | |
Swell 1 Height (m) Direction Period (s) | S 16 | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | S 15 | S 15 | S 14 | SE 12 | S 14 | S 17 | S 16 | S 16 | S 16 | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 |
 kJ | 134 | 134 | 181 | 163 | 157 | 157 | 157 | 155 | 109 | 103 | 71 | 93 | 147 | 188 | 185 | 183 | 125 | 245 | 218 | 212 | 155 | 155 | 153 | 138 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 | SE 10 | SE 12 | SSE 12 | S 14 | S 18 | S 13 | S 13 | S 13 | SSW 13 | SSW 13 | SE 12 | SE 12 | NW 14 | NW 14 | NW 13 | NW 13 | NW 12 |
| kJ | 61 | 66 | 44 | 43 | 43 | 42 | 40 | 24 | 69 | 56 | 94 | 97 | 92 | 90 | 92 | 58 | 57 | 35 | 35 | 52 | 46 | 44 | 43 | 39 |
Swell 3 Height (m) Direction Period (s) | SE 14 | SE 13 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SE 12 | S 18 | S 18 | S 18 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | NNW 15 | NW 15 | SE 12 | SE 12 | SE 12 | SE 10 | SSE 10 |
| kJ | 46 | 44 | 28 | 14 | 14 | 14 | 29 | 39 | 102 | 98 | 154 | 37 | 37 | 36 | 36 | 35 | 35 | 45 | 54 | 35 | 35 | 21 | 17 | 9 |
Wind waves Height (m) Direction Period (s) | 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 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 915 | 847 | 844 | 1000 | 1097 | 1150 | 1098 | 1048 | 950 | 905 | 847 | 964 | 891 | 864 | 870 | 800 | 870 | 1099 | 1069 | 965 | 987 | 921 | 857 | 899 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 38 | 301 | 433 | 427 | 301 | 31 | 31 | 31 | 31 | 33 | 31 | 31 | 33 | 38 | 38 | 31 | 38 | 31 | 31 | 31 | 31 | 38 | 31 | 31 |
Best forecast wave conditions in Kaua'i | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wind Speed (km/h)
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Ocean Swells (m)- Wind Speed (km/h)
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