Ammonias Surf Break

Lat Long: 21.95° N 159.35° W

Ammonias Surf Forecast and Surf Report

Issued: 7 pm 23 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ammonias sea temperature is
26.6° C
0.2° 

Ammonias surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Ammonias surf forecast from 24 Jul 2026:

  • Most powerful swell: Wednesday 29 Jul, 2PM (local time) - 11ft (3.5m), 11s period, ENE swell with 2,974 kJ wave energy.

Best Forecast Surf Conditions for Ammonias this week:

The most powerful waves expected at Ammonias in the next 16 days are 3.5m 11s and forecast to arrive on Wednesday (Jul 29) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 8s period and expected on Saturday (Jul 25) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Wed 29th Jul)11ft (3.5m) 11s

Table - best surf conditions forecast for Ammonias over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s get into it for Ammonias.

We’re looking at a pretty challenging stretch ahead. The surf is going to be a mixed bag, and honestly, for the next week and a half, you’ll be scratching your head more than getting your feet wet. The first solid action doesn't show up until late in the piece, so patience is the name of the game.

The first real chance of the entire period kicks off on Tuesday, July 28th in the afternoon. We’ve got a 7ft swell coming from the ENE, and the wind finally swings to a cross-offshore from the NNE, so the face should be clean. That’s a big positive. The wave energy is solid (1596) and the period is a moderate 13 seconds, giving it some shape. But it’s not a perfect setup, and the morning before that is still messy.

Then, Wednesday, July 29th, is the standout window. The afternoon sees a proper pulse of swell, 10ft from the ENE, and the wind is cross-offshore from the north. The wave energy is pumping (2424), but that size is getting into the "experts only" zone. The period is a shorter 10 seconds, so it’ll be a bit lumpy, but for the experienced crew, this is the best you’re going to get.

After that, it trails off. The morning of Thursday, July 30th, is a write-off with onshore chop, and the rest of the first week of August is plagued by cross-shore winds and messy, short-period swell. The energy stays weak to moderate (between 622 and 946), with periods dropping to 7 to 8 seconds. It’s just not worth paddling out for.

The next possible flicker is on the morning of Wednesday, August 5th. We get a 7ft ENE swell with a 12-second period, which is a nice combo. The wave energy is moderate (1207) and the wind is cross-shore. It’s not clean, but it’s the best looking option in the second week. The period is decent, so the waves will have some push, but the cross-shore wind will keep it a bit lumpy. It’s a *maybe* for the keen.

The water temperature is about average for this time of year, so no surprises there.

So, bottom line: Wednesday, July 29th afternoon is the heavyweight champion of this forecast. Get out there if you’ve got the chops. After that, Wednesday, August 5th morning is your only other real look. The rest of the time, it’s a flat and choppy mess.

Rusty out.

Short Range Forecast

Moderate rain (total 10mm), heaviest on Thu night. Warm (max 26°C on Sun afternoon, min 24°C on Thu night). Mainly fresh winds.

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Mon morning. Warm (max 26°C on Tue morning, min 23°C on Mon night). Wind will be generally light.

Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
1
2
1
1
2
1
2
2
1
0
1
1
2
3
1
3
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SSW
18
2.3
ENE
7
0.9
SSW
17
0.7
S
20
0.9
SSW
19
1
SSW
18
1.1
SSW
18
1
SSW
16
0.9
SSW
16
0.9
SSW
16
1
E
14
1
E
13
1.1
E
13
1.4
E
13
2.1
ENE
13
2.5
ENE
12
3.5
ENE
11
3
ENE
10
2.4
ENE
9
Wave Graph
Metric surfscale
Energy kJ
469
557
440
408
627
731
790
575
452
416
373
347
401
633
1398
1776
2475
2126
858
Wind (km/h)
25
ENE
30
ENE
25
NE
25
ENE
30
ENE
25
NE
25
ENE
25
NE
25
NE
20
ENE
25
ENE
25
NE
20
NE
20
NE
30
NNE
25
NNE
25
NE
20
N
20
ESE
Wind State
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
cross-off
cross
cross-off
on
High Tide
1:36PM0.61m
00:21AM0.18m
2:14PM0.63m
1:16AM0.20m
2:48PM0.65m
1:57AM0.21m
3:20PM0.66m
2:33AM0.23m
3:50PM0.67m
3:10AM0.25m
4:18PM0.66m
3:49AM0.27m
Low Tide
5:07AM0.04m
10:06PM0.17m
6:00AM0.03m
10:10PM0.16m
6:48AM0.01m
10:20PM0.16m
7:31AM-0.01m
10:33PM0.16m
8:11AM-0.02m
10:50PM0.15m
8:48AM-0.01m
11:10PM0.13m
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
clear
clear
clear
rain showers
rain showers
part cloud
clear
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:05
6:07
6:07
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:21
7:21
7:20
7:20
7:19
7:19
7:17
 mm
2
2
1
2
2
1
1
1
1
1
10
Temp °C
25
25
25
24
25
25
24
25
26
24
24
25
24
26
26
25
25
25
26
Feels °C
24
23
23
22
24
23
22
23
24
23
24
24
23
26
26
25
25
25
29
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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

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