
Surf Forecasts:
Ammonias surf forecast from 3 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.
| 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 folks, Rusty here. I've taken a hard look at what's on offer at Ammonias over the next 16 days, and to be straight with you – it's pretty grim. The guidance tells me this reef break can be a good one when conditions line up, with a preference for SSE swell and a clean NW offshore. But over this whole window, I'm seeing almost nothing that's worth paddling out for. The wind is stuck in a cross or cross‑on groove, and the swell direction is mostly ENE – the complete opposite of what this spot loves. There's no standout session, no hidden gem. Just a long, scratchy run of poor surf.
Thursday 2nd July starts things off with a 5‑foot ENE swell, but it's 8‑second short‑period junk, cross‑shore wind at 15 mph, and the water temp is 79° – pretty average for the time of year. The combined energy is moderate (556) but it's all chop and no shape. That pattern continues into Friday with slightly bigger 5–6‑foot ENE swell, same wind, same poor quality.
Saturday 4th brings a switch – a 3‑foot south swell with a very long 21‑second period. That's groundswell, and the energy jumps to a solid 1184 (strong). On paper that sounds promising for a reef, but the cross‑shore wind is still 15 mph, so the surface will be messy. The score is marginal at best – you might find a few cleanish waves if you're patient, but it's hardly a call‑out. Sunday 5th sees a similar 3‑foot SSW swell, period 18 seconds, still cross‑shore wind – another marginal day with scores of 1 out of 10. Those two days are the closest this forecast gets to something surfable, and they're still far from good.
From Monday 6th onward it goes downhill fast. The swell jumps to 7‑foot ENE, but it's all short‑period windswell with a fresh 19 mph cross‑shore breeze. That's big enough to be intimidating for beginners, and the chop will be lumpy. The scores are zeros and ones. For the rest of the first week and into the second week – Tuesday 7th through to Thursday 16th July – it's a relentless run of 4–7‑foot ENE or NE swell, with periods of 7–8 seconds, and steady 15–19 mph cross or cross‑onshore wind. The combined energy ranges from moderate to strong (350–1000), but the quality is consistently poor. There's a brief window on 13th and 14th July with a smaller 2–3‑foot SSW swell and a long 14‑second period, but again the wind is cross‑onshore and the forecast calls it poor.
Friday 17th July finishes the outlook with a 3‑foot east swell of 6 seconds and a 3‑foot SSE swell of 8 seconds – both with cross‑shore wind and poor conditions. No recommendations, no standouts, nothing to get excited about.
I know it's frustrating when a break like Ammonias goes quiet, but this spot is fairly consistent in general – a blank run like this is unusual but not unheard of. Forecasts can change, and I'll keep an eye on it. For now, save the wax for another week.
– Rusty
Short Range ForecastModerate rain (total 10mm), heaviest on Thu night. Warm (max 25°C on Thu afternoon, min 23°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 16mm), heaviest on Sun afternoon. Warm (max 25°C on Sun afternoon, min 23°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||
Thu 2 | Friday 3 | Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | |||||||||||||||
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 | ENE 8 | ENE 8 | ENE 8 | S 21 | S 20 | SSW 19 | SSW 18 | SSW 18 | SSW 16 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
278 | 362 | 285 | 327 | 410 | 573 | 490 | 608 | 522 | 510 | 437 | 481 | 536 | 514 | 496 | 475 | 464 | 464 | 397 | 349 | 400 | |
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 | cross | cross | cross-on | cross | cross-on | cross-on |
High Tide | 5:48PM0.62m | 5:30AM0.21m | 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 | |||||||
Low Tide | 1:03AM0.11m | 10:47AM0.04m | 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 | ||||||||
— | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | |
7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | 7:23 | |
mm | — | 1 | 1 | 2 | 4 | — | — | — | 2 | 2 | 3 | 1 | 1 | 4 | 1 | 1 | 2 | 1 | 1 | 3 | 2 |
Temp °C | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 |
Feels °C | 24 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 17 | 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 |
120 | 118 | 232 | 216 | 147 | 573 | 490 | 608 | 522 | 510 | 437 | 446 | 481 | 355 | 350 | 341 | 331 | 243 | 239 | 168 | 151 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | S 18 | SSW 13 | 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 |
40 | 163 | 67 | 62 | 93 | 193 | 148 | 188 | 138 | 20 | 69 | 21 | 20 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 11 | |
Swell 3 Height (m) Direction Period (s) | SSW 19 | SE 9 | SE 9 | SE 9 | S 23 | SSW 12 | SE 10 | SE 10 | SE 9 | SSW 11 | SE 9 | S 20 | S 11 | NW 9 | — | SE 10 | — | W 19 | S 18 | W 17 | W 16 |
118 | 39 | 38 | 37 | 260 | 56 | 33 | 15 | 12 | 12 | 12 | 30 | 2 | 3 | — | 4 | — | 7 | 6 | 23 | 44 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 |
278 | 362 | 285 | 327 | 410 | 362 | 345 | 327 | 419 | 353 | 417 | 481 | 536 | 514 | 496 | 475 | 464 | 464 | 397 | 349 | 400 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 16 | 31 | 16 | 16 | 31 | 16 | 16 | 33 | 33 | 38 | 31 | 38 | 38 | 31 | 38 | 126 | 31 | 33 | 33 | 33 |
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











