Ammonias Surf Break

Lat Long: 21.95° N 159.35° W

Ammonias Surf Forecast and Surf Report

Issued: 7 am 14 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ammonias sea temperature is
26.3° C
0.1° 

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


Ammonias surf forecast from 15 Jul 2026:

  • Most powerful swell: Tuesday 21 Jul, 2PM (local time) - 3.5ft (1.0m), 14s period, S swell with 412 kJ wave energy.

Best Forecast Surf Conditions for Ammonias this week:

The most powerful waves expected at Ammonias in the next 16 days are 1.0m 14s and forecast to arrive on Tuesday (Jul 21) 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 1.6m 8s period and expected on Tuesday (Jul 14) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Tue 21st Jul)3.5ft (1.0m) 14s

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


The Lowdown

G'day, Rusty here. Look, I'm gonna be straight with you – this 16-day window for Ammonias is a bit of a grind. We're looking at a long stretch of pretty average conditions. The first real standout doesn't come until the very end of the month, so we've got a lot of so-so days to sit through.

The first week and a half is mostly a write-off. From Tuesday, 14 July right through to Sunday, 19 July, the surf is poor. Small swell, mostly around 2 ft to 2 ft, and the wind is a persistent cross or cross-onshore from the ENE. The water's sitting at 79°F, which is about normal for this time of year. The wave energy is weak to moderate (335 to 423), and the comment is "poor surf conditions" every day. Not worth paddling out for.

On Sunday, 19 July afternoon, we get a sniff of something better. There's a jump in size to 5 ft, but it's still only a marginal surf forecast or questionable tide conditions. The wind is cross-shore from the ENE at 12 mph, and the energy is picking up to 528. It's still not clean, but it's the first sign of life.

Now, the real highlight of this whole outlook is the period from Monday, 27 July through Tuesday, 28 July. This is the best on offer. We've got a steady 4 ft swell from the East, with a solid 14–16 second period. That's a proper groundswell, which means better shaped waves and more energy. The combined energy is strong at 862–873, which is a big jump. The wind is cross-shore from the NE at 12 mph, keeping things reasonably clean. The waves will be a bit more powerful, and the longer gaps between sets will make paddling out easier. It's not a total classic, but it's the most promising window in this otherwise flat run.

The final days, 29 July, are a step back with a light cross-onshore breeze and a drop in energy to 409–414. The swell holds at 3 ft from the East, but the quality drops off again.

So, for the diehards, keep your eyes on the 27th and 28th of July. It's the only real standout. The rest of the period is a waiting game. Crowds are likely at Ammonias, as it says "often", but with the weak conditions, it might be quieter than usual.

Rusty.

Short Range Forecast

Moderate rain (total 19mm), heaviest on Wed night. Warm (max 26°C on Wed morning, min 23°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Sat night. Warm (max 26°C on Fri afternoon, min 23°C on Sun night). Wind will be generally light.

Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
Sunday
19
Monday
20
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
SW
14
0.7
SW
14
0.6
SSW
17
0.7
SW
13
0.6
SSW
15
0.8
SSW
16
0.7
SSW
16
0.6
SSW
13
1.5
ENE
7
1.3
ENE
6
1.4
ENE
7
0.7
SSW
13
0.7
SSW
14
0.7
SSW
14
1.4
ENE
6
1.7
E
7
1.6
ENE
8
1.5
ENE
7
1.4
ENE
7
1.4
ENE
7
0.6
S
15
Wave Graph
Metric surfscale
Energy kJ
189
186
197
162
146
314
237
113
204
129
196
192
204
210
155
290
283
212
195
190
163
Wind (km/h)
25
ENE
20
ENE
15
NE
15
E
15
E
15
E
20
E
20
ENE
20
ENE
20
ENE
20
ENE
20
ENE
25
ENE
20
ENE
20
ENE
25
ENE
20
ENE
20
NE
20
ENE
20
NE
20
ENE
Wind State
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
cross-on
cross
cross
cross
cross
cross
High Tide
4:29PM0.77m
3:58AM0.23m
5:08PM0.73m
4:55AM0.26m
5:45PM0.67m
5:57AM0.28m
6:18PM0.59m
7:07AM0.31m
6:48PM0.51m
8:26AM0.35m
7:13PM0.43m
9:50AM0.41m
7:25PM0.35m
Low Tide
8:46AM-0.10m
11:38PM0.10m
9:34AM-0.07m
00:10AM0.09m
10:22AM-0.02m
00:42AM0.08m
11:11AM0.05m
1:14AM0.06m
12:04PM0.14m
1:46AM0.05m
1:11PM0.23m
2:18AM0.05m
2:53PM0.29m
2:52AM0.04m
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
part cloud
clear
clear
clear
clear
clear
rain showers
rain showers
clear
part cloud
rain showers
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:01
6:03
6:03
6:03
6:03
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:22
7:22
7:22
7:22
7:22
7:22
7:22
 mm
2
2
1
2
2
7
3
1
2
1
Temp °C
25
25
24
26
26
25
26
26
25
25
26
25
26
26
25
25
26
24
25
25
24
Feels °C
24
24
24
27
27
26
26
27
25
25
26
25
26
26
25
24
26
23
24
24
23
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Ammonias:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Ammonias surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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

Nearest locationNearest