
Surf Forecasts:
Ammonias surf forecast from 3 Jul 2026:
- Most powerful swell: Wednesday 8 Jul, 2AM (local time) - 7.5ft (2.3m), 8s period, ENE swell with 637 kJ wave energy.
Best Forecast Surf Conditions for Ammonias this week:
The most powerful waves expected at Ammonias in the next 16 days are 2.3m 8s and forecast to arrive on Wednesday (Jul 08) at 2AM. 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 | 2AM (Wed 8th Jul) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for Ammonias over the next 16 days.
Updates in hr min s Forecast update imminent
G’day, I’m Rusty. Let me break down what’s coming at Ammonias over the next couple of weeks – and I won’t sugarcoat it, it’s a rough run.
This is a reef break that faces the open ocean, and it works best with swell from the SSE. But for this entire 16-day stretch, we’re stuck with cross-shore and cross-onshore winds that don’t give us a break. The water temperature is about normal for this time of year, nothing to write home about.
The forecast starts Friday morning, the 3rd of July. That first session is a total loss – rain showers, a 15 mph cross-on easterly wind, and the swell is a bumpy 5ft out of the ENE with only 8 seconds between waves. The combined energy sits at 639 – moderate energy, but the wind makes it impossible. Friday afternoon is the same story, 6ft and cross-shore, still terrible.
Then Saturday the 4th of July, things change. The swell direction swings to the south with a height of just 3ft, but look at this – the period jumps to 21 and 20 seconds. That’s very long-period groundswell. The energy readings are 1194 and 1018, so strong wave energy. The catch? It’s still a cross-shore wind at 15 mph, and the conditions are only marginal. That long-period groundswell at a reef can be special, but with the wind on it, it’s going to be choppy and hard to read. Honestly, this is the best we get across the entire 16 days – a real pity the wind isn’t right.
Sunday the 5th of July is similar, 3ft from the SSW with 18-second periods, but the rain comes back and the cross-shore wind hangs around, so it’s poor by the afternoon. From Monday the 6th of July straight through to Saturday the 11th of July, it’s a grind – 7ft of ENE short-period slop, cross-shore winds of 15 to 19 mph, and energy readings between 396 and 966. All of it is poor, just lumpy and unrideable.
There’s a gap starting after the 11th of July that runs for about a week – a long, quiet stretch of nothing but poor conditions. We get small swells from the SSW at 2ft to 3ft with decent periods from 14 to 18 seconds, but it’s all cross-shore or cross-onshore wind, moderate to fresh at 15 to 19 mph. The energy hangs between 228 and 572, which is weak to moderate, but none of it is worth paddling out for. Monday the 13th of July afternoon brings a 6ft ENE short-period pulse, but again, cross-shore and lumpy with a fresh breeze.
The last mention is Saturday the 18th of July morning – still 3ft of SSW short-period swell, still cross-onshore, still poor.
Mate, there isn’t a standout session here. The only glimmer was Saturday the 4th of July with that long-period south swell, but the wind killed it. This reef needs a clean offshore or glassy day, and we don’t get one. Keep watching the forecasts – things can turn around.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Thu night. Warm (max 25°C on Fri morning, min 23°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 14mm), heaviest on Sun night. Warm (max 25°C on Mon morning, min 24°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||
Friday 3 | Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thu 9 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 21 | S 20 | SSW 19 | SSW 18 | SSW 18 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
353 | 302 | 327 | 382 | 573 | 490 | 608 | 522 | 510 | 487 | 469 | 481 | 439 | 536 | 514 | 637 | 509 | 408 | 363 | 417 | 327 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross |
High Tide | 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 | 1 | — | 2 | 2 | 2 | 2 | 1 | 1 | 4 | 1 | 1 | 3 | 1 | — | 4 | 1 | 2 |
Temp °C | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 |
Feels °C | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 24 | 23 | 23 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | 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 | S 12 |
118 | 232 | 216 | 147 | 573 | 490 | 608 | 522 | 510 | 437 | 446 | 481 | 355 | 350 | 341 | 331 | 247 | 239 | 168 | 151 | 108 | |
Swell 2 Height (m) Direction Period (s) | 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 | SSE 8 | SE 8 |
163 | 67 | 62 | 93 | 193 | 148 | 188 | 138 | 20 | 69 | 21 | 20 | 19 | 18 | 17 | 17 | 18 | 17 | 32 | 26 | 31 | |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | S 23 | SSW 12 | SW 12 | SE 10 | SE 9 | SSW 11 | SE 8 | S 20 | SE 10 | NW 9 | — | SE 10 | — | W 19 | S 18 | W 17 | W 16 | W 15 |
39 | 38 | 37 | 260 | 56 | 35 | 24 | 13 | 12 | 18 | 30 | 4 | 3 | — | 4 | — | 7 | 6 | 23 | 20 | 38 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | 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 8 | ENE 7 | ENE 7 | ENE 7 |
353 | 302 | 327 | 382 | 372 | 345 | 327 | 435 | 310 | 487 | 469 | 471 | 439 | 536 | 514 | 637 | 509 | 408 | 363 | 417 | 327 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 31 | 16 | 16 | 31 | 16 | 16 | 31 | 33 | 31 | 31 | 33 | 31 | 31 | 31 | 16 | 31 | 31 | 16 | 31 | 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











