Surf Forecasts:
Ammonias surf forecast from 24 Sep 2026:
- Most powerful swell: Wednesday 30 Sep, 11PM (local time) - 11ft (3.5m), 10s period, SSE swell with 2,156 kJ wave energy.
Best Forecast Surf Conditions for Ammonias this week:
The most powerful waves expected at Ammonias in the next 16 days are 3.5m 10s and forecast to arrive on Wednesday (Sep 30) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 9s period and expected on Friday (Sep 25) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Wed 30th Sep) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Ammonias over the next 16 days.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu night. Warm (max 26°C on Thu morning, min 25°C on Thu night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Tue night. Warm (max 26°C on Sun morning, min 25°C on Sun morning). Winds decreasing (fresh winds from the ENE on Sun afternoon, light winds from the ESE by Tue afternoon). | ||||||||||||||||||||
Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | Wednesday 30 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | E 9 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | E 9 | E 9 | E 9 | ENE 9 | SSW 12 | SSW 11 | SSW 12 | SSW 11 | SW 11 | SE 8 | SE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 452 | 412 | 459 | 566 | 667 | 846 | 1180 | 1376 | 2093 | 1957 | 1703 | 1373 | 848 | 692 | 560 | 469 | 550 | 527 | 814 | 775 | 985 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | cross-on | cross-on | cross-on |
High Tide | 2:27PM0.57m | 2:51AM0.46m | 2:52PM0.54m | 3:29AM0.52m | 3:16PM0.49m | 4:09AM0.57m | 3:42PM0.44m | 4:52AM0.61m | 4:07PM0.38m | 5:40AM0.63m | 4:30PM0.32m | 6:37AM0.64m | 4:45PM0.27m | ||||||||
Low Tide | 8:47PM0.09m | 8:35AM0.10m | 9:07PM0.05m | 9:22AM0.12m | 9:29PM0.02m | 10:12AM0.15m | 9:54PM0.00m | 11:09AM0.18m | 10:22PM-0.00m | 12:15PM0.21m | 10:54PM0.00m | 1:46PM0.24m | 11:31PM0.02m | ||||||||
 | |  | |  | |  | |  | | |  | | | |  | |  |  | | | |
 | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — |
 | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — | — | 6:25 | — |
mm | — | — | 3 | — | — | 2 | 1 | 1 | — | — | — | — | — | — | 3 | — | — | 7 | 7 | 5 | 5 |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 25 | 26 | 26 |
Feels °C | 26 | 25 | 24 | 24 | 25 | 24 | 24 | 24 | 22 | 23 | 23 | 23 | 25 | 25 | 25 | 28 | 28 | 26 | 24 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SSW 17 | SSW 17 | SSW 16 | SW 16 | SSW 15 | SE 11 | SSW 16 | SE 11 | SE 11 | SE 11 | SSE 11 | S 11 | S 11 | SSW 12 | ENE 8 | ENE 8 | SSW 11 | SW 11 | SW 11 | SSW 10 |
| kJ | 232 | 377 | 368 | 318 | 245 | 291 | 140 | 407 | 198 | 263 | 268 | 226 | 295 | 433 | 560 | 370 | 370 | 527 | 814 | 730 | 778 |
Swell 2 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | N 9 | SSW 19 | SE 10 | SSW 18 | SE 11 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SE 10 | SE 9 | SE 8 | SSW 11 | SSW 12 | SSE 7 | E 14 | E 14 | E 14 |
| kJ | 71 | 44 | 42 | 25 | 125 | 127 | 270 | 142 | 387 | 348 | 321 | 226 | 100 | 77 | 67 | 469 | 550 | 99 | 95 | 146 | 99 |
Swell 3 Height (m) Direction Period (s) | N 10 | NNW 10 | NNW 9 | S 11 | N 9 | SSW 12 | SSW 15 | SW 11 | NW 15 | NW 13 | SSE 15 | SSW 18 | SSW 14 | SSW 17 | SSW 17 | SE 8 | SSE 7 | SW 15 | SSE 13 | SSE 13 | S 16 |
| kJ | 55 | 32 | 28 | 21 | 14 | 56 | 142 | 31 | 54 | 44 | 85 | 130 | 168 | 202 | 197 | 57 | 66 | 232 | 66 | 67 | 122 |
Wind waves Height (m) Direction Period (s) | E 9 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | E 9 | E 9 | E 9 | ENE 9 | ENE 8 | — | — | ENE 8 | ESE 8 | SE 8 | SE 8 |
| kJ | 452 | 412 | 459 | 566 | 667 | 846 | 1180 | 1376 | 2093 | 1957 | 1703 | 1373 | 848 | 692 | 536 | — | — | 318 | 531 | 775 | 985 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 33 | 31 | 31 | 31 | 31 | 31 | 31 | 330 | 329 | 303 | 303 | 299 | 118 | 126 | 118 | 135 | 33 | 32 | 32 | 32 |
Best forecast wave conditions in Kaua'i | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.
Information about the Ammonias Surf forecast
The above surf forecast table for Ammonias provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ammonias can be found by selecting the local surf guide option on the grey menu. Our Ammonias surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Ammonias) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Ammonias may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a vacation in Kaua'i? If you are looking for accommodation near Ammonias, camping, hotels and condos and appartments in Kaua'i, consider staying in Nawiliwili which is 2 km (1 miles) away. Alternatively, find information about places to stay and car hire in Lihue - Kauai which is 3 km (2 miles) away
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