
Surf Forecasts:
Ammonias surf forecast from 6 Jul 2026:
- Most powerful swell: Tuesday 7 Jul, 8AM (local time) - 8ft (2.4m), 8s period, ENE swell with 653 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 1.8m 8s period and expected on Sunday (Jul 12) at 2AM.
| 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
Alright, Rusty here again. Let's break it down in the old units.
Honestly, the next couple of weeks at Ammonias are looking pretty rough. We've got a long stretch of messy conditions ahead. The water temp is 79°, which is about normal for this time of year, so that's one small blessing.
The first big dry spell runs from Monday, July 6th, right through to the afternoon of Sunday, July 12th. The wind is howling out of the ENE at 15 to 19 mph, either cross or cross-onshore, just tearing the surface apart. The swell is hanging around 7 ft to 8 ft, but it's short-period ENE windswell, 7 to 8 seconds. The combined wave energy is moderate to strong (1019-538), but it's just lumpy, cross-chop. No clean waves to be had.
We get a tiny break on the morning of Sunday, July 12th, with a 3 ft SSW swell and a very long 16-second period, but the energy is weak (413) and the wind is still cross. Not worth it.
The next window is Monday, July 13th, through Tuesday, July 14th. The swell drops to 4 ft to 6 ft, and the wind lightens a bit to 9 to 12 mph from the ENE. It's still cross, but conditions are "marginal" instead of "poor." The energy is moderate (760-383). This is the best of the bunch, but it's not a standout. The swell is still short-period windswell, so it'll be weak and short.
After that, from Wednesday, July 15th, it's back to poor conditions with cross-onshore winds. The swell drops to 2 ft to 2 ft, and even with a long-period 16 to 19-second groundswell on the 16th and 21st, the energy is moderate (426-638) and the wind is ruining it. The 21st has a promising 2 ft E swell with a 19-second period, but the cross-wind will make it a blown-out mess.
The best on offer is Monday, July 13th, and Tuesday, July 14th. The wind is lightest (9 to 12 mph) and conditions are just "marginal." The swell is 4 ft to 6 ft from the ENE, which is too big for beginners, and the short period (7 seconds) means it'll be gutless. It's a reef break, so it handles some size, but the wind direction doesn't match the optimum swell direction (SSE), so it's going to be a frustrating paddle. You can expect crowds here, and with this forecast, it'll be a local-only affair.
It's a pretty normal run of poor conditions for this area. The forecasts can change, but right now, I'd leave the board in the garage. The long period swells are a tease, but they're not coming with clean wind.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Mon morning. Warm (max 25°C on Mon afternoon, min 23°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 29mm), heaviest during Fri afternoon. Warm (max 26°C on Thu afternoon, min 24°C on Thu morning). Mainly fresh winds. | ||||||||||||||||||||
Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | |||||||||||||||
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) | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | SW 17 | SSW 16 | ENE 8 | ENE 8 |
Wave Graph | |||||||||||||||||||||
522 | 514 | 551 | 653 | 541 | 469 | 509 | 452 | 440 | 400 | 411 | 415 | 428 | 405 | 545 | 487 | 372 | 309 | 326 | 447 | 487 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 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 | 2:19PM0.73m | 1:06AM0.18m | 3:04PM0.77m | 2:08AM0.19m | |||||||
Low Tide | 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 | 6:09AM-0.08m | 10:03PM0.14m | 7:03AM-0.10m | 10:34PM0.12m | ||||||||
5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | |
— | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | |
mm | 2 | — | 3 | 1 | — | 4 | 2 | 2 | 3 | 1 | — | 2 | 2 | 4 | 6 | 4 | 3 | 7 | — | 1 | — |
Temp °C | 24 | 25 | 24 | 24 | 25 | 24 | 25 | 25 | 24 | 25 | 26 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 |
Feels °C | 22 | 22 | 22 | 21 | 23 | 22 | 23 | 23 | 22 | 24 | 25 | 23 | 24 | 24 | 23 | 24 | 24 | 23 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | S 11 | SW 19 | SSW 18 | SW 18 | SW 17 | SSW 16 | SW 16 | SW 16 |
446 | 481 | 355 | 350 | 341 | 265 | 247 | 229 | 168 | 112 | 110 | 75 | 99 | 66 | 184 | 214 | 316 | 309 | 326 | 367 | 353 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 9 | SE 8 | SE 8 | SE 8 | W 13 | W 14 | W 13 | S 11 | S 12 | S 12 | SE 8 | SE 8 | SE 8 | SSE 12 |
21 | 20 | 19 | 19 | 18 | 11 | 18 | 12 | 18 | 11 | 17 | 30 | 65 | 55 | 61 | 44 | 44 | 33 | 34 | 30 | 48 | |
Swell 3 Height (m) Direction Period (s) | S 20 | SE 10 | NW 9 | N 9 | W 9 | — | W 16 | S 18 | W 15 | W 14 | W 14 | S 15 | SE 8 | SW 20 | W 14 | W 14 | W 13 | S 13 | SSE 13 | SSE 12 | SE 8 |
30 | 4 | 3 | 2 | 2 | — | 5 | 6 | 17 | 15 | 32 | 17 | 10 | 102 | 59 | 61 | 54 | 51 | 53 | 49 | 21 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | NE 8 | NE 8 | ENE 8 | ENE 8 |
522 | 514 | 551 | 653 | 541 | 469 | 509 | 452 | 440 | 400 | 411 | 415 | 428 | 405 | 545 | 487 | 372 | 358 | 398 | 447 | 487 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 33 | 31 | 31 | 33 | 31 | 31 | 31 | 33 | 16 | 33 | 33 | 16 | 16 | 31 | 38 | 33 | 31 | 16 | 31 | 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










