
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: Wednesday 29 Jul, 2AM (local time) - 6.5ft (2.0m), 12s period, E swell with 1,155 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 2.0m 12s and forecast to arrive on Wednesday (Jul 29) at 2AM. Winds are predicted to be cross-offshore 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 | 2AM (Wed 29th Jul) | 6.5ft (2.0m) 12s |
Table - best surf conditions forecast for Ammonias over the next 16 days.
The Lowdown
G'day, Rusty here, lookin' at the surf for the next couple of weeks. It's a bit of a mixed bag, but I'll break it down for you.
We start off on Wednesday, 29 July, with a bit of swell at Ammonias. A clean 7 ft from the ENE, with a period of 11 seconds, and a light cross-offshore breeze. The wave energy is strong (1144). The wind's light, so it's shaping up nicely, maybe a bit of a wait for the bigger sets. It's a reef break, fairly consistent, but crowds are likely. The water temp is about average for this time of year, so no surprises there.
Thursday, 30 July, gets a bit messier. Morning sees a drop in size to 3 ft from the S, but with a solid 13-second period, the energy is moderate (718). The wind's onshore though, making it choppy. The afternoon picks up to 5 ft from the ENE, but the period drops to 8 seconds, and the wind is cross-shore, creating a lumpy cross-chop. Not great.
Friday, 31 July, is a write-off. Strong ENE winds at 16 mph, and the swell is a messy 6 ft to 6 ft with a short, weak period of 7 seconds. The energy is moderate (844-945), but it's choppy and cross-shore. Not worth a paddle.
Saturday, 1 August, and Sunday, 2 August, see a bit of a spike in size, pushing 8 ft to 8 ft from the ENE. The period is still short, 8 to 9 seconds, and the wind is a fresh 16 to 19 mph cross-shore. The energy is strong (1132-1178), but it's lumpy and messy. This is getting up there in size, over 8 ft, so it's for experts only at this point, but the wind is making it a tough paddle. The setup looks more interesting for kite surfing than paddle surfing.
From Monday, 3 August, it's a steady decline. The swell drops, the wind stays cross or cross-on, and the conditions are poor. You'll see a bit of a bump around Tuesday, 4 August, with a 6 ft from the ENE and a nice 12-second period, giving a moderate 897 energy, but the wind is cross-on and choppy. It's a struggle.
There's a long gap of poor surf from 31 July right through to the end of the second week. The standout, if you can call it that, is the very first session on Wednesday, 29 July. That's the cleanest you'll see. The rest of the period is a tough run of cross-shore wind and lumpy, messy waves. It's one of those times where the forecast might change, but the outlook is pretty empty.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu morning. Warm (max 27°C on Thu afternoon, min 24°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Fri night. Warm (max 26°C on Sat morning, min 24°C on Fri night). Mainly fresh winds. | ||||||||||||||||||
Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | ||||||||||||||
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 12 | ENE 11 | ENE 10 | S 14 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 9 |
Wave Graph | |||||||||||||||||||
1155 | 867 | 540 | 297 | 284 | 303 | 284 | 355 | 405 | 611 | 792 | 812 | 847 | 838 | 711 | 567 | 450 | 370 | 304 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | glassy | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 3:10AM0.25m | 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 | |||||||
Low Tide | 10:50PM0.15m | 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 | ||||||
— | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
7:19 | — | 7:17 | — | — | 7:17 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:15 | — | |
mm | — | — | — | — | 1 | — | — | — | — | 1 | — | 1 | 4 | — | — | — | — | — | — |
Temp °C | 25 | 26 | 26 | 26 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 24 | 25 | 26 | 24 | 25 | 26 | 24 |
Feels °C | 25 | 28 | 28 | 30 | 29 | 28 | 26 | 27 | 25 | 24 | 23 | 23 | 22 | 23 | 24 | 22 | 25 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | E 12 | ENE 11 | ENE 10 | NE 9 | ENE 8 | S 13 | S 13 | S 12 | SW 15 | SW 15 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | ENE 13 |
1155 | 867 | 540 | 388 | 280 | 276 | 206 | 146 | 232 | 220 | 205 | 205 | 199 | 199 | 200 | 142 | 87 | 81 | 225 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | 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 6 | SE 6 |
137 | 268 | 264 | 297 | 284 | 152 | 175 | 169 | 141 | 159 | 123 | 123 | 131 | 95 | 68 | 12 | 34 | 9 | 19 | |
Swell 3 Height (m) Direction Period (s) | S 16 | SSE 10 | SSW 19 | SW 19 | SW 18 | E 19 | SE 6 | E 16 | E 15 | S 12 | S 11 | S 11 | S 11 | N 9 | SE 8 | SW 13 | SW 12 | SSW 12 | SSW 12 |
77 | 9 | 37 | 58 | 154 | 27 | 14 | 174 | 167 | 70 | 39 | 38 | 21 | 14 | 18 | 42 | 39 | 30 | 48 | |
Wind waves Height (m) Direction Period (s) | NNE 7 | NNE 8 | NNE 7 | — | — | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 9 |
138 | 116 | 101 | — | — | 303 | 284 | 355 | 405 | 611 | 792 | 812 | 847 | 838 | 711 | 567 | 450 | 370 | 304 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 14 | 10 | 0 | 0 | 14 | 31 | 16 | 38 | 127 | 299 | 38 | 299 | 46 | 33 | 31 | 16 | 31 | 16 | 16 |
Best forecast wave conditions in Kaua'i | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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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










