
Surf Forecasts:
Ammonias surf forecast from 11 Jul 2026:
- Most powerful swell: Sunday 12 Jul, 2PM (local time) - 7ft (2.2m), 8s period, ENE swell with 551 kJ wave energy.
Best Forecast Surf Conditions for Ammonias this week:
The most powerful waves expected at Ammonias in the next 16 days are 2.2m 8s and forecast to arrive on Sunday (Jul 12) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 7s period and expected on Tuesday (Jul 14) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sun 12th Jul) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Ammonias over the next 16 days.
G’day, Rusty here. Look, I’ll be straight with you – we’ve got a long stretch ahead and it ain’t looking pretty for most of it. The first decent recommendation doesn’t kick in until Monday the 13th of July, so we’re looking at a few days of waiting before you even want to bother paddling out. This is Ammonias we’re talking about, and it’s a reef setup, fairly consistent, exposed to the swell, with an optimum direction from the SSE. The water temp is sitting at a normal 79° for this time of year, no real anomaly to speak of.
Now, for that Monday the 13th of July, morning and afternoon we’ve got marginal surf. Swell is coming from the ENE at about 6ft to 6ft with a period of 8 seconds, which is short period, so it’s gonna be a bit messy and lacking that real punch. Combined swell energy is 586 to 737 – that’s moderate energy, so there’s something moving, but it’s not gonna light the world on fire. The wind is a cross-shore moderate breeze from the NE and ENE at 16 mph, so not clean, not offshore, just okay. Crowds can be an issue here as they’re often around, so expect company if you go. This is the best on offer in the whole window, but it’s pretty weak.
Tuesday the 14th of July morning is also marginal, same ENE swell around 5ft at 8 seconds (575 energy), but by the afternoon it drops back to poor with messy cross-chop. From Wednesday the 15th of July onward through to the end of the period, it’s mostly poor surf conditions with cross-onshore winds, lumpy chop, and weak energy readings. The swell direction shifts on the 15th afternoon to a long-period SSW groundswell of 2ft with 18 seconds, but it’s cross-onshore and choppy – waste of a long period. The energy stays moderate (319 to 833) but the quality is just not there for a good paddle session.
In the second week, around the 22nd to 25th of July, we get some marginal calls with that SSW long-period groundswell popping up again, periods of 14 to 20 seconds, but the size is tiny – 2ft to 3ft – and cross-shore winds from the ENE keep it from being clean. The energy is moderate to strong (516 to 833), but for paddle surfing, it’s just too small and wind-affected to recommend. Honestly, if you’re looking to get wet, this reef is better left for another time or maybe consider a kite setup if the wind holds.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Sun morning. Warm (max 26°C on Sat afternoon, min 24°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryModerate rain (total 18mm), heaviest on Tue morning. Warm (max 26°C on Mon afternoon, min 23°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Fri 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | |||||||||||||||
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 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | SSW 17 | ENE 7 | SSW 18 | SSW 16 | SSW 16 | SSW 13 | SSW 14 | ENE 6 |
Wave Graph | |||||||||||||||||||||
344 | 373 | 412 | 359 | 359 | 444 | 501 | 501 | 408 | 322 | 286 | 240 | 250 | 202 | 173 | 216 | 314 | 237 | 113 | 183 | 207 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross-on |
High Tide | 11:46PM0.18m | 2:19PM0.73m | 1:06AM0.18m | 3:04PM0.77m | 2:08AM0.19m | 3:47PM0.78m | 3:04AM0.21m | 4:29PM0.77m | 3:58AM0.23m | 5:08PM0.73m | 4:55AM0.26m | 5:45PM0.67m | 5:57AM0.28m | ||||||||
Low Tide | 9:34PM0.17m | 6:09AM-0.08m | 10:03PM0.14m | 7:03AM-0.10m | 10:34PM0.12m | 7:55AM-0.11m | 11:06PM0.11m | 8:46AM-0.10m | 11:38PM0.10m | 9:34AM-0.07m | 00:10AM0.09m | 10:22AM-0.02m | 00:42AM0.08m | 11:11AM0.05m | |||||||
— | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | |
7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | 7:22 | |
mm | 2 | 1 | — | — | 3 | 3 | 1 | 2 | — | — | 1 | 3 | 3 | 4 | 1 | — | 6 | — | 1 | 2 | — |
Temp °C | 25 | 24 | 25 | 26 | 24 | 25 | 25 | 24 | 25 | 26 | 24 | 24 | 25 | 24 | 25 | 26 | 24 | 26 | 26 | 25 | 26 |
Feels °C | 24 | 23 | 23 | 25 | 23 | 24 | 23 | 23 | 23 | 24 | 23 | 23 | 24 | 23 | 25 | 26 | 24 | 26 | 26 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | S 11 | SW 19 | SSW 18 | SW 18 | SW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SW 14 | SW 14 | SW 14 | SW 14 | W 15 | W 15 | W 15 | SSW 16 | W 14 | NNE 7 | SSW 14 | NNE 8 |
66 | 184 | 214 | 316 | 309 | 326 | 322 | 310 | 283 | 214 | 206 | 189 | 186 | 298 | 287 | 279 | 314 | 203 | 70 | 183 | 34 | |
Swell 2 Height (m) Direction Period (s) | W 13 | S 11 | SE 8 | W 13 | SE 9 | SSE 13 | SSE 12 | SSE 12 | W 19 | W 18 | W 17 | W 16 | W 16 | SSW 13 | SW 13 | SSW 12 | W 15 | SSW 16 | W 14 | W 14 | W 14 |
55 | 60 | 25 | 54 | 27 | 53 | 47 | 48 | 112 | 150 | 142 | 257 | 248 | 109 | 162 | 103 | 272 | 237 | 203 | 146 | 142 | |
Swell 3 Height (m) Direction Period (s) | SE 8 | W 14 | W 14 | SE 9 | S 13 | W 12 | W 12 | SE 8 | SSE 12 | SSE 11 | SE 7 | SSW 19 | SE 6 | SSW 17 | SSW 18 | SSW 18 | SE 6 | SSW 13 | SSW 13 | NNE 8 | SE 8 |
17 | 59 | 61 | 26 | 51 | 26 | 26 | 11 | 46 | 50 | 16 | 146 | 10 | 200 | 123 | 216 | 9 | 113 | 113 | 45 | 29 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | NE 7 | NE 7 | NE 7 | E 7 | ENE 6 | ENE 6 |
344 | 373 | 412 | 359 | 359 | 444 | 501 | 501 | 408 | 322 | 286 | 240 | 250 | 202 | 173 | 217 | 217 | 132 | 92 | 139 | 207 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 31 | 31 | 31 | 16 | 33 | 38 | 16 | 31 | 16 | 16 | 16 | 16 | 16 | 31 | 31 | 16 | 31 | 31 | 16 | 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











