Ammonias Surf Break

Lat Long: 21.95° N 159.35° W

Ammonias Surf Forecast and Surf Report

Issued: 1 am 07 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ammonias sea temperature is
26.3° 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 7 Jul 2026:

  • Most powerful swell: Tuesday 7 Jul, 11AM (local time) - 7.5ft (2.3m), 8s period, ENE swell with 662 kJ wave energy.

Best Forecast Surf Conditions for Ammonias this week:

The most powerful waves expected at Ammonias in the next 16 days are 2.3m 8s and forecast to arrive on Tuesday (Jul 07) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 17s period and expected on Tuesday (Jul 14) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11AM (Tue 7th Jul)7.5ft (2.3m) 8s

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


Alright, Rusty here. Let’s have a look at what we’ve got on the table.

Honestly, mate, it’s a pretty grim run for Ammonias over the next week and a half. The surf is on offer, sure, but the conditions are just not playing ball. The whole outlook is plagued by messy cross-shore and cross-onshore winds, and the wave comment keeps coming back as “poor surf conditions” or “marginal.” You’ll be battling a lumpy, choppy ocean for days on end.

The early part of the window, starting Tuesday the 7th of July, is a write-off. You’ve got a 8ft ENE swell, but it’s short period at 8 seconds, and a fresh 19 mph cross-wind is just ruining it. The combined wave energy is strong at 1032, but it’s all chop and no shape. That theme holds right through the first week. The water’s sitting at 79°, which is bang on average for this time of year, so no surprises there.

There is a big gap of nothing but poor conditions until we finally get a glimmer of hope. The standout window is Sunday the 19th of July and Monday the 20th. That’s still over a week and a half away, so keep that in your back pocket as a promising prospect rather than a sure thing.

On Sunday the 19th, both morning and afternoon, you’ll see a solid 8ft swell from the ENE with an 8-second period. The combined energy jumps way up to 1238, which is proper strong. The wind is a moderate 16 mph cross-breeze, which is the best we’ve seen in ages. It’s still not glassy, but it’s a big step up from the onshore crap. This is the pick of the run, but that 8ft is right on the edge for beginners – it’s more of a confident intermediate to expert wave. The break is exposed and fairly consistent, though crowds are likely at this spot. It’s a reef setup, so that short-period ENE swell should still offer a decent wall, just don’t expect the super-long lines.

Monday the 20th is similar, with a 8ft ENE swell and slightly softer energy at 1178, but the wind stays cross, and you’ll get the same moderate breeze. A solid second day to chase.

After that, things taper off back to mediocrity through the 21st and 22nd.

So, to sum it up: forget about the next ten days. Your best bet is to circle Sunday the 19th of July at Ammonias. It’s not perfect, but it’s the only time in the outlook where the swell and wind align well enough to make it worth a paddle.

Rusty.

Short Range Forecast

Moderate rain (total 18mm), heaviest on Tue morning. Warm (max 25°C on Tue morning, min 24°C on Tue morning). Mainly fresh winds.

Days 4-6 Weather Summary

Heavy rain (total 25mm), heaviest during Sun night. Warm (max 26°C on Fri afternoon, min 24°C on Fri night). Mainly fresh winds.

Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
Monday
13
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.3
ENE
8
2.1
ENE
8
2.2
ENE
7
2
ENE
8
1.9
ENE
8
2
ENE
8
2.1
ENE
8
2
ENE
8
2
ENE
7
2.2
ENE
8
2.1
ENE
8
2.2
ENE
7
2.2
ENE
7
2
ENE
7
2
ENE
7
2
ENE
7
2.1
ENE
8
2.2
ENE
8
2
ENE
8
1.7
ENE
8
1.7
ENE
7
Wave Graph
Metric surfscale
Energy kJ
662
533
498
464
411
438
495
452
440
512
469
498
516
435
423
435
487
512
450
345
294
Wind (km/h)
30
NE
25
ENE
25
ENE
25
ENE
30
ENE
25
ENE
30
ENE
25
ENE
25
ENE
25
ENE
30
ENE
30
ENE
30
NE
30
NE
25
NE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
20
ENE
Wind State
cross
cross
cross
cross-on
cross-on
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross
cross
High Tide
10:50AM0.41m
8:03PM0.35m
11:53AM0.50m
8:28PM0.28m
12:45PM0.59m
9:34PM0.22m
1:33PM0.67m
11:46PM0.18m
2:19PM0.73m
1:06AM0.18m
3:04PM0.77m
2:08AM0.19m
3:47PM0.78m
3:04AM0.21m
Low Tide
3:53PM0.29m
3:45AM-0.01m
6:49PM0.27m
4:28AM-0.03m
9:16PM0.22m
5:17AM-0.06m
9:34PM0.17m
6:09AM-0.08m
10:03PM0.14m
7:03AM-0.10m
10:34PM0.12m
7:55AM-0.11m
11:06PM0.11m
rain showers
part cloud
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
part cloud
rain showers
rain showers
rain showers
rain showers
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
6:00
6:00
6:00
6:01
6:01
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:23
7:23
7:23
7:23
7:23
7:23
7:23
 mm
1
2
2
2
3
2
2
4
3
2
7
1
2
2
8
1
Temp °C
25
25
24
25
25
24
25
25
24
25
26
25
25
26
24
25
25
25
25
25
24
Feels °C
22
22
22
24
24
22
23
23
23
25
25
24
23
25
23
24
24
24
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)
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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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