Ammonias Surf Break

Lat Long: 21.95° N 159.35° W

Ammonias Surf Forecast and Surf Report

Issued: 1 pm 12 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 13 Jul 2026:

  • Most powerful swell: Monday 13 Jul, 5AM (local time) - 7ft (2.1m), 8s period, ENE swell with 501 kJ wave energy.

Best Forecast Surf Conditions for Ammonias this week:

The most powerful waves expected at Ammonias in the next 16 days are 2.1m 8s and forecast to arrive on Monday (Jul 13) at 5AM. 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 7s period and expected on Tuesday (Jul 14) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5AM (Mon 13th Jul)7ft (2.1m) 8s

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


Alright, it’s Rusty here. Let’s size up the next couple of weeks at our spot, Ammonias.

First thing you gotta know – this is going to be a rough run. The entire 16-day window is plagued by cross-shore and cross-onshore winds. We’re looking at a lot of chop, lumpy conditions, and poor surf quality almost every day. The water temperature is sitting at 79°F, which is spot on average for this time of year, so at least you won’t need a wetsuit.

There’s a real gap of poor conditions right from the start. On Sunday, July 12th, we’ve got 7 ft of short-period swell from the ENE (8 seconds) but it’s all messed up by a moderate cross-breeze. The combined swell energy is moderate at 901. The wave comment is "poor surf conditions" – don’t bother paddling out.

That theme continues straight through. Monday the 13th is a bit smaller at 6 ft, still short-period and cross-chop. Tuesday the 14th sees a tiny 2 ft pulse from the SW with a 14-second period, but again, the wind ruins it. The entire first week is just a write-off – cross-wind, cross-onshore, choppy, and never a clean moment.

Into the second week, things don’t improve much. Saturday the 19th has 6 ft of ENE swell with 7-second period – the combined energy hits 653, which is moderate, but the wind is still cross and the waves look messy. Sunday the 20th is similar but smaller. There’s a little flicker on Monday the 27th, where we get 6 ft of ENE swell with an 8-second period and a combined energy of 1211 – that’s strong – but again, the wind is cross-shore and the wave comment is only "marginal." It’s the closest thing to a standout, but honestly, it’s still a gamble with that chop.

Honestly, there’s no standout session here. Every day that has decent swell size (like the 6 ft to 7 ft days) is hammered by bad wind. The few times the period gets long (like 15–18 seconds on the 24th and 26th) the swell is tiny – only 2 ft to 3 ft. Not worth the effort.

If you’re desperate, the morning of Monday the 27th is the least terrible option – 6 ft from the ENE, 8 seconds, moderate cross-shore, and a score of 2 out of 10. But I wouldn’t call it good. It’s just not as bad as everything else.

Save your energy, mate. This forecast is a bust.

- Rusty

Short Range Forecast

Moderate rain (total 17mm), heaviest on Sun night. Warm (max 25°C on Sun afternoon, min 23°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Wed night. Warm (max 26°C on Wed afternoon, min 24°C on Wed night). Wind will be generally light.

Sun
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
ENE
8
2
ENE
8
1.8
ENE
8
1.6
ENE
8
1.6
ENE
7
0.7
SW
14
1.5
ENE
8
1.4
ENE
8
1.3
ENE
7
1.1
ENE
7
0.7
SW
16
1.5
ENE
7
0.9
SSW
13
1.3
SSW
12
1
SSW
11
0.6
SSW
16
1.3
ENE
6
1.6
ENE
7
1.9
ENE
7
1.9
ENE
7
1.7
E
7
Wave Graph
Metric surfscale
Energy kJ
468
459
373
288
242
189
257
213
178
131
251
204
257
429
245
196
149
219
387
394
303
Wind (km/h)
25
ENE
25
ENE
25
ENE
20
ENE
15
NE
25
ENE
20
ENE
15
ENE
20
E
15
E
15
E
20
E
25
ENE
25
ENE
25
ENE
20
ENE
20
ENE
20
E
20
ENE
20
ENE
20
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross
cross-on
cross-on
High Tide
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
6:18PM0.59m
7:07AM0.31m
6:48PM0.51m
8:26AM0.35m
Low Tide
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
1:14AM0.06m
12:04PM0.14m
1:46AM0.05m
1:11PM0.23m
rain showers
rain showers
part cloud
part cloud
rain showers
rain showers
rain showers
rain showers
rain showers
clear
rain showers
rain showers
clear
rain showers
part cloud
part cloud
part cloud
rain showers
clear
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:01
6:01
6:03
6:03
6:03
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:23
7:23
7:22
7:22
7:22
7:22
7:22
7:22
 mm
2
5
1
3
2
2
2
1
1
1
1
2
Temp °C
25
24
25
25
24
24
25
24
25
26
25
25
26
25
26
26
25
26
26
25
26
Feels °C
24
23
23
24
23
23
24
24
25
27
28
26
26
25
26
26
26
27
26
26
26
  • 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