Ammonias Surf Break

Lat Long: 21.95° N 159.35° W

Ammonias Surf Forecast and Surf Report

Issued: 1 pm 23 Sep 2026 (local time)

Forecast update in  hr  min

Today's Ammonias sea temperature is
27.0°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 24 Sep 2026:

  • Most powerful swell: Saturday 26 Sep, 11PM (local time) - 13ft (4.0m), 10s period, E swell with 2,509 kJ wave energy.

Best Forecast Surf Conditions for Ammonias this week:

The most powerful waves expected at Ammonias in the next 16 days are 4.0m 10s and forecast to arrive on Saturday (Sep 26) 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 0.4m 9s period and expected on Friday (Sep 25) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Sat 26th Sep)13ft (4.0m) 10s

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


Short Range Forecast

Light rain (total 3mm), mostly falling on Thu night. Warm (max 27°C on Wed afternoon, min 25°C on Wed night). Mainly fresh winds.

Days 5-7 Weather Summary

Moderate rain (total 11mm), heaviest on Tue morning. Warm (max 26°C on Sun morning, min 25°C on Sat afternoon). Mainly fresh winds.

Wed
23
Thursday
24
Friday
25
Saturday
26
Sunday
27
Monday
28
Tuesday
29
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
0
0
1
1
1
1
1
2
0
1
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
E
10
1.6
E
9
1.8
ENE
8
1.9
E
8
2.2
E
7
2.4
ENE
8
2.4
ENE
8
2.5
ENE
8
3
ENE
9
3.5
ENE
9
3.5
ENE
9
3.5
ENE
9
3.5
E
9
3
E
9
2.5
ENE
9
2.2
ENE
8
1.6
ENE
8
1.5
ENE
8
1.4
ENE
8
1.4
ENE
8
Wave Graph
Metric surfscale
Energy kJ
527
430
459
453
537
661
713
867
1400
1938
2386
2044
1759
1228
872
614
350
273
261
248
Wind (km/h)
25
NE
20
NE
25
ENE
25
NE
25
ENE
30
NE
30
NE
30
ENE
35
NE
35
NE
35
ENE
35
ENE
35
ENE
30
ENE
35
ENE
30
ENE
30
ENE
30
ESE
30
SE
20
SE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
High Tide
2:02PM0.59m
2:15AM0.40m
2:27PM0.57m
2:51AM0.46m
2:52PM0.54m
3:29AM0.52m
3:16PM0.49m
4:09AM0.57m
3:42PM0.44m
4:52AM0.61m
4:07PM0.38m
5:40AM0.63m
4:30PM0.32m
Low Tide
8:31PM0.12m
7:50AM0.10m
8:47PM0.09m
8:35AM0.10m
9:07PM0.05m
9:22AM0.12m
9:29PM0.02m
10:12AM0.15m
9:54PM0.00m
11:09AM0.18m
10:22PM-0.00m
12:15PM0.21m
10:54PM0.00m
clear
clear
part cloud
part cloud
rain showers
clear
clear
rain showers
part cloud
rain showers
rain showers
clear
clear
part cloud
part cloud
part cloud
light rain
rain showers
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:26
6:26
6:26
6:26
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:31
6:30
6:30
6:29
6:29
6:28
6:27
 mm
1
2
1
4
1
5
8
17
Temp °C
27
25
26
26
25
25
26
25
25
25
25
26
26
25
26
26
25
26
26
26
Feels °C
27
25
25
25
24
23
24
23
23
22
22
22
23
23
23
24
23
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
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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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