
Surf Forecasts:
Ammonias surf forecast from 5 Jul 2026:
- Most powerful swell: Tuesday 7 Jul, 8AM (local time) - 8ft (2.4m), 8s period, ENE swell with 657 kJ wave energy.
Best Forecast Surf Conditions for Ammonias this week:
The most powerful waves expected at Ammonias in the next 16 days are 2.4m 8s and forecast to arrive on Tuesday (Jul 07) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 8s period and expected on Saturday (Jul 04) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Tue 7th Jul) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Ammonias over the next 16 days.
Updates in hr min s Forecast update imminent
Right then, let’s have a look at what we’ve got for Ammonias. It’s a reef setup, fairly consistent, but don’t go getting your hopes up too high just yet. The water's sitting at 79°, which is bang on average for this time of year.
The big news is that Saturday the 4th of July morning offers up a nice groundswell from the south at 3ft with a very long period of 21 seconds. That’s proper energy for a reef break, with the combined swell energy sitting at a solid 1197. The wind is cross from the ENE at 16 mph, which is not glassy, but it’s manageable. This is about as good as it’s going to get over the next couple of weeks, so if you’re heading out, make it then. Keep in mind, the period is so long it could make the waves a bit straight at certain spots, but for Ammonias, a south swell is what it likes.
After that Saturday morning window, things go pretty average. By Saturday afternoon, the energy drops to 983 and the scores fall off a cliff. Sunday the 5th is a write-off with fresh cross-shore winds and lumpy conditions. Monday the 6th sees a shift to a weak, short-period 7ft ENE swell at just 8 seconds – messy, and with rain showers and fresh cross-breezes. That bump is too big for beginners, and the short period makes for poor shapes.
The rest of the first week and into the second is a real struggle. From Tuesday the 7th all the way through to Saturday the 18th of July, it’s a long, bleak run of poor surf. The swell hangs around at 6ft to 7ft from the east or ENE, but it’s almost all short-period (6 to 8 seconds), cross-shore winds are relentless, and the wave energy is weak to moderate (values between 278 and 922). Nothing clean, nothing worth paddling out for unless you’re a glutton for punishment. There is a tiny blip on Sunday the 12th afternoon with a 3ft SW swell at 16 seconds, but the winds are messy and it’s marked as marginal at best.
There’s no standout in the second week. The pattern just keeps churning out poor conditions. Overall, the only window worth your time is Saturday morning, July 4th. After that, the forecast is grim. For a spot that’s fairly consistent, it’s a frustrating run, but that’s how it goes sometimes. forecasts can change, but right now, it’s a waiting game.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Sat night. Warm (max 25°C on Sat morning, min 23°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Tue night. Warm (max 26°C on Thu afternoon, min 23°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | |||||||||||||||
AM | PM | 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) | 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 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
573 | 490 | 608 | 522 | 510 | 469 | 545 | 514 | 613 | 554 | 514 | 464 | 452 | 358 | 286 | 340 | 294 | 327 | 310 | 325 | 456 | |
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-on | cross | cross | cross | cross | cross |
High Tide | 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 | 11:46PM0.18m | ||||||||
Low Tide | 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 | 9:34PM0.17m | ||||||||
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 | — | |
mm | — | — | 1 | 2 | 1 | 1 | 1 | 2 | 3 | — | — | 1 | — | 1 | 1 | 1 | — | 2 | 1 | 2 | 7 |
Temp °C | 25 | 25 | 24 | 24 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 26 | 24 | 25 | 25 | 24 |
Feels °C | 24 | 24 | 23 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 22 | 22 | 24 | 23 | 23 | 24 | 25 | 23 | 24 | 25 | 23 |
Swell 1 Height (m) Direction Period (s) | 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 | S 11 | SW 19 |
573 | 490 | 608 | 522 | 510 | 437 | 446 | 481 | 355 | 350 | 341 | 265 | 247 | 239 | 168 | 151 | 108 | 106 | 99 | 66 | 184 | |
Swell 2 Height (m) Direction Period (s) | 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 6 | W 14 | W 13 | W 14 |
217 | 148 | 188 | 138 | 12 | 68 | 21 | 20 | 19 | 18 | 11 | 18 | 18 | 24 | 54 | 33 | 31 | 16 | 57 | 55 | 58 | |
Swell 3 Height (m) Direction Period (s) | SW 12 | SW 12 | SE 10 | SE 9 | SSW 11 | SE 9 | S 20 | SE 10 | NW 9 | N 9 | SE 11 | SE 10 | W 16 | S 18 | W 15 | W 14 | W 14 | W 14 | SSE 6 | SE 8 | S 11 |
35 | 35 | 24 | 12 | 12 | 12 | 30 | 4 | 3 | 2 | 4 | 4 | 5 | 6 | 17 | 34 | 32 | 57 | 4 | 17 | 39 | |
Wind waves Height (m) Direction Period (s) | 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 | ENE 7 | ENE 7 |
372 | 310 | 347 | 419 | 397 | 469 | 545 | 514 | 613 | 554 | 514 | 464 | 452 | 358 | 286 | 340 | 294 | 327 | 310 | 325 | 456 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 16 | 16 | 33 | 31 | 31 | 31 | 33 | 31 | 33 | 33 | 16 | 31 | 31 | 16 | 31 | 31 | 16 | 16 | 31 | 16 |
Best forecast wave conditions in Kaua'i | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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










