
Surf Forecasts:
Ammonias surf forecast from 1 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 5AM (local time) - 5ft (1.5m), 11s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 2 Aug, 5AM (local time) - 8ft (2.5m), 8s period, ENE swell with 1,000 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 5AM (local time) - 5ft (1.5m), 11s period with ENE swell.
Best Forecast Surf Conditions for Ammonias this week:
The surf forecast for Ammonias over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 05) at 5AM. The primary swell is predicted to be 1.5m and 11s period with a secondary swell of 0.5m and 11s. Another secondary swell of 0.4m and 15s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Ammonias in the next 16 days are 2.5m 8s and forecast to arrive on Sunday (Aug 02) at 5AM. 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+) | 5AM (Wed 5th Aug) | 5ft (1.5m) 11s |
| Best Surf | 5AM (Wed 5th Aug) | 5ft (1.5m) 11s |
| Most Powerful | 5AM (Sun 2nd Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Ammonias over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s be straight with you: this Ammonias stretch is looking pretty grim for the next 16 days. The whole period is a run of marginal to poor conditions, with no standout sessions that’ll get you firing out of bed. The combined energies are all over the place, but the wind and wave quality just aren’t playing ball.
We kick off on Saturday, August 1st, and it’s already a letdown. Swell is a lumpy 8 ft from the east, period a short 8 seconds, and that ENE wind is smashing it cross-shore at 19 mph. The combined energy is moderate (1171), but the cross-chop is messy—this is kite-surfing territory, not paddle. Water temp sits at 80°, about average for this time of year, so at least you won’t freeze. Sunday, August 2nd, isn’t much better: 8 ft to 7 ft east swell, still 8 seconds, and the wind stays fresh and cross. Scores drop to zero by afternoon.
Monday, August 3rd, pulls back a bit to 6 ft, but it’s still cross-shore and messy. Tuesday, August 4th, offers a glimmer: 5 ft east swell, but the period stretches to 12 seconds, which is a groundswell—better energy, longer gaps between sets. Combined energy is 688, moderate, and the wind eases to a gentle breeze (9 mph), cross-shore with slight chop. It’s still marginal, but if you’re desperate, the morning might hold a few cleanish lines. This is the only session that even nudges a 2/10.
From Wednesday, August 5th, through to Sunday, August 16th, it’s a slog. The swell drops to around 3 ft to 4 ft, wind stays cross or cross-on, and the wave comment is “poor surf conditions” or “marginal” at best. There’s a brief spike of energy on August 12th with a 5 ft south swell (17-second period, combined energy 1708—strong), but the wind is cross-on and choppy, ruining it. August 16th wraps up with 4 ft east swell and 7-second period, cross-on again.
Honestly, nothing here is worth chasing. The best of a bad bunch is Tuesday, August 4th, morning: 5 ft east swell, 12-second period, gentle cross-shore breeze. It’s not clean, but it’s the least messy. Every other day, you’re fighting lumpy cross-chop or onshore wind. The break is a reef, exposed, and crowds are often here—but with conditions this poor, you’ll likely have it to yourself. For beginners, 5 ft is fine, but the cross-shore chop makes it tough. Experts will find nothing to excite.
Take a break, mate. Forecasts can change, but this 16-day window is a write-off for Ammonias.
Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Sat night. Warm (max 26°C on Sun morning, min 24°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Tue night. Warm (max 27°C on Thu afternoon, min 24°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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) | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | ENE 7 | SW 21 | SW 20 | E 7 |
Wave Graph | |||||||||||||||||||||
804 | 893 | 976 | 820 | 657 | 574 | 402 | 306 | 299 | 593 | 515 | 572 | 331 | 269 | 184 | 134 | 128 | 136 | 143 | 98 | 206 | |
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-on | cross-on | cross | cross | cross |
High Tide | 5:32PM0.57m | 6:19AM0.34m | 5:54PM0.51m | 7:26AM0.38m | 6:14PM0.44m | 8:45AM0.44m | 6:28PM0.37m | 10:10AM0.50m | 11:24AM0.57m | 12:26PM0.64m | |||||||||||
Low Tide | 10:44AM0.09m | 00:22AM0.07m | 11:33AM0.16m | 00:50AM0.05m | 12:35PM0.23m | 1:21AM0.04m | 2:08PM0.29m | 1:58AM0.03m | 2:46AM0.02m | 3:47AM0.01m | 4:56AM-0.01m | ||||||||||
6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
— | 7:16 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:13 | — | |
mm | — | — | 2 | — | — | — | — | — | — | — | — | 1 | — | — | 1 | 1 | 1 | 2 | — | 1 | 1 |
Temp °C | 25 | 25 | 24 | 26 | 26 | 25 | 25 | 26 | 24 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 26 | 25 |
Feels °C | 23 | 23 | 21 | 24 | 24 | 23 | 24 | 26 | 24 | 26 | 26 | 27 | 27 | 28 | 27 | 27 | 28 | 26 | 27 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | E 15 | E 15 | E 14 | E 14 | E 14 | E 13 | E 13 | E 13 | E 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | ENE 10 | SSW 15 | ENE 8 | ENE 8 | SSW 14 | SE 7 | SSW 14 | SE 8 |
205 | 150 | 199 | 194 | 140 | 123 | 86 | 84 | 104 | 56 | 53 | 68 | 39 | 269 | 87 | 134 | 128 | 81 | 25 | 74 | 32 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SE 7 | SSW 13 | SE 6 | SSW 12 | SE 9 | SE 8 | SSW 15 | SSE 13 | SSW 15 | S 12 | SSW 14 | SSW 14 | S 11 | SSW 14 | SSE 8 | SSW 13 |
123 | 123 | 131 | 77 | 68 | 14 | 34 | 9 | 48 | 39 | 18 | 89 | 55 | 87 | 46 | 81 | 80 | 39 | 78 | 25 | 70 | |
Swell 3 Height (m) Direction Period (s) | S 11 | S 11 | S 11 | N 9 | SE 8 | SW 13 | SE 7 | SSW 12 | SE 7 | W 13 | SW 16 | SSE 13 | SW 15 | SSW 11 | SSW 10 | SE 8 | SE 8 | N 7 | SW 21 | SW 20 | SSW 19 |
39 | 37 | 21 | 14 | 17 | 42 | 13 | 50 | 11 | 31 | 69 | 58 | 60 | 38 | 30 | 16 | 16 | 9 | 115 | 98 | 146 | |
Wind waves Height (m) Direction Period (s) | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | — | ENE 9 | — | — | ENE 7 | ENE 7 | ENE 5 | E 7 |
804 | 893 | 976 | 820 | 657 | 574 | 402 | 306 | 299 | 593 | 515 | 572 | 331 | — | 184 | — | — | 136 | 143 | 91 | 206 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 127 | 38 | 31 | 38 | 16 | 31 | 31 | 16 | 31 | 31 | 16 | 16 | 16 | 16 | 31 | 31 | 16 | 16 | 16 | 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











