Surf Forecasts:
Ammonias surf forecast from 21 Jul 2026:
- Most powerful swell: Monday 27 Jul, 11PM (local time) - 5.5ft (1.7m), 14s period, E swell with 1,163 kJ wave energy.
Best Forecast Surf Conditions for Ammonias this week:
The most powerful waves expected at Ammonias in the next 16 days are 1.7m 14s and forecast to arrive on Monday (Jul 27) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 8s period and expected on Monday (Jul 27) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Mon 27th Jul) | 5.5ft (1.7m) 14s |
Table - best surf conditions forecast for Ammonias over the next 16 days.
The Lowdown
Yo, Rusty here, checkin' in from Ammonias. Right, let’s get straight into it. Over the next couple of days, it’s gonna be a bit of a slow burn. We’ve got a fair bit of swell energy moving through, but the quality is gonna be a real mixed bag.
Monday, July 20th kicks off with a cross-shore breeze and some moderate wave energy (505), but the swell is short period at just 7 seconds from the ENE, coming in at about 5 feet. It’s a bit choppy and the setup looks more interesting for kite surfing than proper paddle surfing.
The best session of the whole stretch looks like it’ll be Wednesday morning, July 29th. We’ve got a solid 7 foot swell from the ENE with a decent 13-second period. Combined wave energy is strong at 1803, and the wind is a gentle cross-shore breeze, which should keep things fairly clean. This is the standout – bigger, better shaped, and the wind is on your side.
Thursday morning, July 30th swings in with a 8 foot swell from the ENE, but that’s getting into expert territory. It’s also a touch onshore, making it a bit lumpy, so only for the keen crew.
After that, things drop off. From Thursday afternoon, July 30th through to Monday, August 4th, the swell goes small and the period drops right down. Most days are showing poor to marginal conditions with cross-onshore winds and weak energy. There’s a real dry spell there for almost a week with nothing worth paddling out for.
The water temp is sitting at 80°, which is about normal for the time of year – doesn't feel any different to what you’d expect in July.
So, keep your eyes on Wednesday the 29th for the best chance of some decent, cleaner waves. After that, it’s a waiting game. The forecast can always change, but for now, that’s your lot.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Wed morning. Warm (max 26°C on Tue morning, min 23°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Thu night. Warm (max 26°C on Fri afternoon, min 23°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | ||||||||||||||
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 7 | S 15 | S 14 | S 13 | SSW 24 | SSW 23 | SSW 22 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | ENE 7 | ENE 8 | SSW 18 | SSW 18 | E 16 | E 16 | E 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 178 | 275 | 320 | 352 | 437 | 564 | 480 | 528 | 399 | 469 | 403 | 379 | 440 | 502 | 731 | 662 | 615 | 714 | 935 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on |
High Tide | 11:06AM0.46m | 12:06PM0.52m | 12:55PM0.57m | 1:36PM0.61m | 00:21AM0.18m | 2:14PM0.63m | 1:16AM0.20m | 2:48PM0.65m | 1:57AM0.21m | ||||||||||
Low Tide | 2:52AM0.04m | 3:30AM0.04m | 4:16AM0.04m | 5:07AM0.04m | 10:06PM0.17m | 6:00AM0.03m | 10:10PM0.16m | 6:48AM0.01m | 10:20PM0.16m | ||||||||||
 |  |  |  | | | |  | | | | | | | |  | | | | |
 | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — |
 | 7:22 | — | 7:22 | — | — | 7:21 | — | — | 7:21 | — | — | 7:21 | — | — | 7:20 | — | — | 7:20 | — |
mm | — | — | 1 | 3 | 5 | 1 | 1 | — | — | 2 | 2 | — | — | 2 | — | — | — | — | 2 |
Temp °C | 25 | 26 | 26 | 25 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 26 | 24 | 24 | 25 | 24 | 25 | 25 | 24 |
Feels °C | 25 | 26 | 26 | 26 | 24 | 24 | 23 | 24 | 23 | 23 | 24 | 25 | 23 | 24 | 23 | 22 | 24 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 15 | S 14 | S 13 | S 14 | S 13 | S 13 | SSW 20 | S 13 | SSW 18 | S 12 | SSW 17 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | E 16 | E 16 | E 16 |
| kJ | 110 | 275 | 320 | 352 | 311 | 276 | 212 | 528 | 219 | 469 | 190 | 340 | 302 | 502 | 731 | 662 | 615 | 714 | 935 |
Swell 2 Height (m) Direction Period (s) | S 15 | SSW 11 | SW 16 | SSW 26 | SSW 24 | SSW 23 | SSW 22 | S 13 | SSW 20 | S 13 | SSW 18 | S 12 | S 20 | SSW 16 | S 11 | E 17 | SSW 16 | SSW 16 | SSW 16 |
| kJ | 163 | 50 | 65 | 224 | 437 | 564 | 480 | 209 | 399 | 123 | 356 | 141 | 408 | 223 | 61 | 214 | 575 | 452 | 416 |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 17 | E 15 | SE 6 | E 12 | E 12 | E 12 | E 12 | E 12 | S 11 | ENE 10 | S 21 | S 12 | S 12 | E 14 | S 11 | S 11 | S 10 | SSE 12 |
| kJ | 69 | 72 | 38 | 9 | 73 | 103 | 103 | 103 | 98 | 56 | 34 | 326 | 97 | 95 | 103 | 37 | 37 | 35 | 13 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 178 | 176 | 186 | 186 | 247 | 212 | 161 | 307 | 277 | 326 | 403 | 379 | 440 | 483 | 560 | 579 | 412 | 392 | 327 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 16 | 16 | 16 | 16 | 16 | 33 | 16 | 16 | 16 | 31 | 16 | 33 | 31 | 16 | 16 | 31 | 16 | 16 | 31 |
Best forecast wave conditions in Kaua'i | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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
Nearest