Ammonias Surf Break

Lat Long: 21.95° N 159.35° W

Ammonias Surf Forecast and Surf Report

Issued: 7 pm 11 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 12 Jul 2026:

  • Most powerful swell: Sunday 12 Jul, 11PM (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 Sunday (Jul 12) at 11PM. 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 8s period and expected on Tuesday (Jul 14) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Sun 12th Jul)7ft (2.1m) 8s

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


Hey folks, Rusty here. Let’s be straight up – this 16-day window for Ammonias is a real grind. We’re looking at a long stretch of onshore and cross-shore winds that just won’t let up, and the swell is mostly weak and messy. There’s no standout, no real gem hiding in here. The best you can hope for is a few marginal sessions, but nothing that’ll get the heart racing.

The first week is a total write-off. Sunday the 12th kicks off with a rain shower and a strong 19 mph cross-onshore wind, making a lumpy mess of a 7 ft swell from the ENE. The combined energy hits 879 (moderate), but with that wind and short 7-second period, it’s just a choppy, poor surf situation. Monday and Tuesday are more of the same – cross-shore winds, lumpy chop, and swell dropping fast. By Wednesday the 15th, the swell is tiny at 2 ft, and even though that period stretches to 15 seconds, the cross-onshore wind keeps it ugly. This pattern holds through the rest of the first week: moderate cross-onshore winds, weak swell, and a “poor surf conditions” label on every session. There’s a slight uptick on Friday the 17th with 5 ft from the ENE, but the wind is still cross-on, killing any chance of quality.

Heading into the second week, things don’t really improve. Sunday the 19th and Monday the 20th bring a bit more swell energy – 5 ft then 6 ft – but again, the wind is cross or cross-on, and the waves are just not clean. The combined energy hits 556 and 635 (moderate), but the “marginal surf forecast” label says it all. Around Wednesday the 22nd, we start seeing some long-period SSW groundswell (24 seconds!), but it’s tiny – only 2 ft to 2 ft. The combined energy jumps to 953 then 1020 (strong), but with the wind still cross-on, it’s just a clean-looking swell that gets wrecked. The rest of the week into the 27th shows a slow build of S and SSW swells, with periods between 15 and 20 seconds and combined energy in the 1000s (strong to very strong), but the wind is always cross or cross-on – never offshore. The water temp is about average for this time of year, so no surprises there.

Honestly, if you’re desperate for a paddle, the best chance might be on Thursday the 24th afternoon or Friday the 25th, when the swell is 3 ft to 4 ft from the SSW, period around 18-20 seconds, and the wind is cross-shore with a moderate breeze. The combined energy is strong (1148 and 1496), but it’s still a marginal, lumpy cross-chop. Not worth a special trip. For a reef break that’s fairly consistent and exposed to SSE swells, we’re getting nothing that matches that optimum direction – the swell is from ENE, S, and SSW, which is a poor fit. Crowds are often an issue here, but with conditions this poor, you’ll probably have it to yourself.

This is a blank run, plain and simple. For an area like this, it’s not unusual – sometimes the forecasts just line up wrong. Keep an eye on the long-range, but don’t hold your breath.

Rusty

Short Range Forecast

Moderate rain (total 15mm), heaviest on Mon night. Warm (max 25°C on Sat night, min 23°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 13mm), heaviest on Tue night. Warm (max 26°C on Wed afternoon, min 24°C on Tue night). Wind will be generally light.

Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Sat
18
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
1
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
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
ENE
7
2.1
ENE
7
2
ENE
8
2
ENE
8
1.8
ENE
8
1.6
ENE
7
1.5
ENE
7
0.7
SW
14
0.7
SW
14
1.5
ENE
8
0.7
SW
13
0.6
SSW
15
0.8
SSW
16
0.6
SSW
16
1.2
ENE
7
0.7
SSW
14
1.5
ENE
7
1.6
ENE
7
1.4
ENE
7
1.3
ENE
7
0.7
SSW
14
Wave Graph
Metric surfscale
Energy kJ
405
475
447
459
358
280
242
189
186
240
162
146
314
179
120
181
204
216
175
156
210
Wind (km/h)
25
ENE
30
ENE
25
ENE
25
ENE
20
ENE
25
NE
25
NE
25
ENE
20
NE
20
ENE
20
E
15
ENE
15
E
20
E
20
ENE
25
ENE
25
ENE
25
ENE
20
ENE
25
ENE
25
ENE
Wind State
cross
cross-on
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
cross
High Tide
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
6:18PM0.59m
7:07AM0.31m
6:48PM0.51m
Low Tide
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
1:14AM0.06m
12:04PM0.14m
rain showers
rain showers
rain showers
rain showers
part cloud
part cloud
rain showers
rain showers
clear
rain showers
rain showers
clear
rain showers
rain showers
clear
part cloud
rain showers
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:01
6:01
6:01
6:03
6:03
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:23
7:23
7:23
7:22
7:22
7:22
7:22
7:22
 mm
3
2
2
2
3
3
4
3
4
1
1
Temp °C
25
25
25
24
25
25
24
25
25
24
25
26
25
26
26
25
26
26
25
25
26
Feels °C
25
25
24
23
24
24
23
24
24
23
25
26
26
27
26
26
25
26
25
25
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