Surf Forecasts:
Ammonias surf forecast from 29 Jul 2026:
- Best quality surf: Wednesday 29 Jul, 2PM (local time) - 6ft (1.8m), 10s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 2 Aug, 5AM (local time) - 8ft (2.5m), 8s period, ENE swell with 955 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 2PM (local time) - 6ft (1.8m), 10s period with ENE swell.
Best Forecast Surf Conditions for Ammonias this week:
The surf forecast for Ammonias over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jul 29) at 2PM. The primary swell is predicted to be 1.8m and 10s period with a secondary swell of 0.8m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Ammonias in the next 16 days are 2.5m 8s and forecast to arrive on Sunday (Aug 02) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 9s period and expected on Wednesday (Jul 29) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Wed 29th Jul) | 6ft (1.8m) 10s |
| Best Surf | 2PM (Wed 29th Jul) | 6ft (1.8m) 10s |
| Most Powerful | 5AM (Sun 2nd Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Ammonias over the next 16 days.
Short Range ForecastMostly dry. Warm (max 27°C on Wed afternoon, min 24°C on Fri night). Winds increasing (calm on Wed night, fresh winds from the ENE by Fri night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sat night. Warm (max 26°C on Sat morning, min 24°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | |||||||||||||||
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) | ENE 11 | ENE 10 | S 14 | S 13 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 12 | ENE 11 | ENE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 783 | 540 | 297 | 284 | 276 | 245 | 292 | 383 | 547 | 836 | 748 | 915 | 928 | 732 | 642 | 457 | 313 | 306 | 614 | 460 | 444 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | glassy | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross |
High Tide | 4:18PM0.66m | 3:49AM0.27m | 4:44PM0.65m | 4:33AM0.29m | 5:08PM0.61m | 5:22AM0.32m | 5:32PM0.57m | 6:19AM0.34m | 5:54PM0.51m | 7:26AM0.38m | 6:14PM0.44m | 8:45AM0.44m | 6:28PM0.37m | ||||||||
Low Tide | 8:48AM-0.01m | 11:10PM0.13m | 9:25AM0.00m | 11:32PM0.11m | 10:03AM0.04m | 11:56PM0.09m | 10:44AM0.09m | 00:22AM0.07m | 11:33AM0.16m | 00:50AM0.05m | 12:35PM0.23m | 1:21AM0.04m | 2:08PM0.29m | 1:58AM0.03m | |||||||
 | |  | | |  |  | | | | |  |  | | | | | |  | | | |
 | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 7:17 | — | — | 7:17 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 26 | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 24 | 25 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 27 | 29 | 30 | 29 | 27 | 26 | 27 | 25 | 24 | 23 | 23 | 23 | 24 | 24 | 22 | 24 | 25 | 25 | 27 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 10 | NE 9 | ENE 8 | S 13 | S 13 | S 12 | SW 15 | SSW 15 | E 15 | E 15 | E 14 | E 14 | E 14 | E 13 | ENE 13 | ENE 12 | E 13 | ENE 12 | ENE 11 | ENE 11 |
| kJ | 783 | 540 | 388 | 219 | 276 | 206 | 146 | 232 | 144 | 205 | 150 | 199 | 142 | 140 | 90 | 55 | 50 | 119 | 614 | 460 | 444 |
Swell 2 Height (m) Direction Period (s) | S 14 | S 14 | S 14 | S 13 | SW 18 | SSW 16 | SSW 16 | S 12 | E 15 | SSW 14 | SSW 14 | SSW 14 | SW 14 | SSW 13 | SE 7 | SSW 13 | SE 7 | SE 7 | SE 9 | SSW 11 | SSW 11 |
| kJ | 268 | 264 | 297 | 284 | 152 | 175 | 169 | 141 | 159 | 123 | 123 | 131 | 92 | 68 | 13 | 34 | 18 | 23 | 39 | 42 | 47 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SSW 19 | SW 19 | SW 18 | N 9 | SE 6 | E 16 | E 15 | S 12 | S 11 | S 11 | N 10 | N 9 | SE 8 | SW 13 | SE 7 | SW 13 | SSW 12 | SSW 12 | SW 16 | SSW 15 |
| kJ | 9 | 37 | 58 | 154 | 6 | 14 | 174 | 167 | 70 | 39 | 38 | 17 | 15 | 17 | 42 | 14 | 40 | 48 | 46 | 69 | 91 |
Wind waves Height (m) Direction Period (s) | NNE 6 | NNE 7 | — | — | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | — |
| kJ | 100 | 91 | — | — | 263 | 245 | 292 | 383 | 547 | 836 | 748 | 915 | 928 | 732 | 642 | 457 | 313 | 306 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 0 | 0 | 16 | 16 | 38 | 33 | 33 | 31 | 46 | 299 | 126 | 33 | 38 | 16 | 31 | 31 | 10 | 12 | 14 | 12 |
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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