
Surf Forecasts:
Ammonias surf forecast from 4 Jul 2026:
- Most powerful swell: Saturday 4 Jul, 11PM (local time) - 3ft (0.9m), 19s period, SSW swell with 627 kJ wave energy.
Best Forecast Surf Conditions for Ammonias this week:
The most powerful waves expected at Ammonias in the next 16 days are 0.9m 19s and forecast to arrive on Saturday (Jul 04) 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 0.5m 13s period and expected on Friday (Jul 10) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sat 4th Jul) | 3ft (0.9m) 19s |
Table - best surf conditions forecast for Ammonias over the next 16 days.
Updates in hr min s Forecast update imminent
Alright, grab a coffee and settle in. You know me, Rusty. Let's talk about what's on the table for the next couple of weeks. First off, I gotta be straight with you: it’s a rough stretch. We’re looking at a long, long gap right off the bat. The first real sniff of something surfable doesn’t show until the afternoon of Thursday, the 3rd of July, and even that's a floppy, cross-shore mess. After that, it’s day after day of poor conditions and marginal surf. The week leading up to the 10th is a tough watch, with moderate to fresh cross-shore winds and messy, weak, short-period chop. The combined energy is bouncing around, but mostly it’s in the low to moderate range – plenty of power, but all wrong for a clean wave.
There's a glimmer on the morning of Saturday, the 5th of July, with a 3 ft swell from the SSW. But don’t get your hopes up. That cross-shore breeze is kicking up an ugly cross-chop, and the ratings are all zeroes or ones. Honestly, the whole first week is a write-off for a proper paddle session.
Then things get really weird. Starting around the 11th of July, the swell direction swings to the SSW and SW, with periods stretching out to 18 seconds – proper groundswell. But look, at only 2 ft to 3 ft, it’s just not enough to get excited about for a spot like Ammonias. The combined energy drops into the low 200s and 300s, which is weak. The wind is still cross-shore or cross-onshore, so it’s not clean. The whole second week, from the 11th through the 18th of July, is a painful run of poor or marginal conditions.
The only time worth mentioning at all is the morning of Wednesday, the 16th of July. The swell jumps to 6 ft from the ENE, with the combined energy climbing to a moderate 611. But the period is just 7 seconds – a messy windswell – and the wind is a gentle cross-onshore. It’s still only a “marginal” call. Not a standout, not by a long shot. It’s just the least-bad slot in a very bleak window. For a beginner, that 6 ft is too much, and for an expert, it’s just a gutless, choppy wall.
The tough truth is this: for Ammonias, it’s a blank run. The setup looks way more interesting for kite surfing than paddle surfing for most of this period. We’ve got a persistent side wind and very poor surf quality. If I were you, I’d wait for the next forecast update before waxing up. Conditions this rough don’t tend to hold forever, but right now, it’s a hard pass.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Fri afternoon. Warm (max 26°C on Fri afternoon, min 24°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Mon afternoon. Warm (max 25°C on Mon afternoon, min 23°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||
Fri 3 | Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | ENE 8 | ENE 8 | S 21 | S 20 | SSW 19 | SSW 18 | SSW 18 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
336 | 402 | 573 | 490 | 608 | 522 | 510 | 462 | 487 | 550 | 501 | 525 | 451 | 495 | 438 | 373 | 379 | 379 | 271 | 310 | 265 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross-on | cross |
High Tide | 6:17PM0.59m | 6:37AM0.22m | 6:44PM0.55m | 8:00AM0.26m | 7:11PM0.49m | 9:31AM0.32m | 7:37PM0.42m | 10:50AM0.41m | 8:03PM0.35m | 11:53AM0.50m | 8:28PM0.28m | 12:45PM0.59m | 9:34PM0.22m | 1:33PM0.67m | |||||||
Low Tide | 1:33AM0.09m | 11:30AM0.10m | 2:02AM0.07m | 12:26PM0.17m | 2:33AM0.05m | 1:48PM0.24m | 3:07AM0.02m | 3:53PM0.29m | 3:45AM-0.01m | 6:49PM0.27m | 4:28AM-0.03m | 9:16PM0.22m | 5:17AM-0.06m | ||||||||
— | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | |
7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | 7:23 | |
mm | 1 | 4 | 2 | — | 2 | 1 | 1 | 2 | — | 2 | 2 | — | — | — | 1 | 1 | 1 | — | — | 3 | 1 |
Temp °C | 26 | 24 | 25 | 25 | 24 | 24 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 26 | 25 | 25 |
Feels °C | 25 | 23 | 24 | 24 | 23 | 22 | 23 | 22 | 23 | 23 | 23 | 23 | 22 | 22 | 23 | 23 | 23 | 24 | 25 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SSW 16 | S 21 | S 20 | SSW 19 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | S 13 | S 12 | S 12 | S 12 | S 12 |
216 | 147 | 573 | 490 | 608 | 522 | 510 | 437 | 446 | 481 | 355 | 350 | 341 | 331 | 247 | 239 | 168 | 151 | 110 | 106 | 69 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SE 9 | SSW 13 | SE 9 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | W 13 |
62 | 93 | 193 | 148 | 188 | 138 | 12 | 69 | 20 | 20 | 19 | 18 | 18 | 18 | 11 | 17 | 32 | 24 | 30 | 28 | 56 | |
Swell 3 Height (m) Direction Period (s) | SE 9 | S 23 | SSW 12 | SW 12 | SE 10 | SE 9 | SSW 11 | SE 9 | S 20 | SE 10 | SE 11 | — | W 9 | W 18 | W 17 | W 17 | W 15 | W 14 | W 14 | W 14 | SE 8 |
38 | 260 | 56 | 35 | 15 | 13 | 12 | 12 | 30 | 4 | 5 | — | 2 | 6 | 6 | 6 | 18 | 37 | 35 | 57 | 23 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
336 | 402 | 372 | 345 | 389 | 408 | 369 | 462 | 487 | 550 | 501 | 525 | 451 | 495 | 438 | 373 | 379 | 379 | 271 | 310 | 265 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 16 | 31 | 31 | 16 | 31 | 31 | 38 | 33 | 38 | 31 | 31 | 33 | 16 | 31 | 31 | 16 | 31 | 16 | 16 | 31 |
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











