Surf Break

Lat Long: 21.95° N 159.35° W

Ammonias Surf Forecast and Surf Report

Issued: 1 pm 27 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 28 Sep 2026:

  • Most powerful swell: Sunday 27 Sep, 5PM (local time) - 10ft (3.0m), 9s period, E swell with 1,779 kJ wave energy.

Best Forecast Surf Conditions for Ammonias this week:

The most powerful waves expected at Ammonias in the next 16 days are 3.0m 9s and forecast to arrive on Sunday (Sep 27) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 12s period and expected on Wednesday (Sep 30) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5PM (Sun 27th Sep)10ft (3.0m) 9s

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


Short Range Forecast

Heavy rain (total 46mm), heaviest during Tue night. Warm (max 26°C on Sun afternoon, min 25°C on Sun night). Mainly fresh winds.

Days 5-7 Weather Summary

Heavy rain (total 46mm), heaviest during Wed afternoon. Warm (max 27°C on Fri afternoon, min 25°C on Wed night). Wind will be generally light.

Sun
27
Monday
28
Tuesday
29
Wednesday
30
Thursday
1
Friday
2
Saturday
3
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
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)
3
E
9
3
E
9
2.4
ENE
9
2.2
ENE
8
1.8
ENE
8
1.6
ENE
8
2.2
SSE
7
2.2
S
7
1.9
S
7
1.7
SSE
6
1.4
SSE
6
0.9
ENE
8
1.2
SSE
6
0.7
SSW
12
0.7
SSW
13
0.9
ENE
7
0.7
SSW
12
0.7
SSW
12
0.7
SSW
11
0.7
S
12
Wave Graph
Metric surfscale
Energy kJ
1779
1243
819
678
450
318
498
453
326
233
145
101
106
160
165
73
147
145
135
137
Wind (km/h)
30
ENE
30
ENE
30
ENE
25
E
20
ESE
25
SE
25
SSE
30
SSE
25
SSE
20
SSE
20
SSE
15
SSE
15
SSE
10
SSE
15
S
15
SSE
15
SSW
25
S
25
S
25
SSW
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
3:42PM0.44m
4:52AM0.61m
4:07PM0.38m
5:40AM0.63m
4:30PM0.32m
6:37AM0.64m
4:45PM0.27m
7:45AM0.63m
9:06AM0.62m
10:26AM0.63m
10:41PM0.20m
Low Tide
9:54PM0.00m
11:09AM0.18m
10:22PM-0.00m
12:15PM0.21m
10:54PM0.00m
1:46PM0.24m
11:31PM0.02m
00:20AM0.05m
1:32AM0.09m
7:09PM0.16m
3:12AM0.12m
rain showers
rain showers
rain showers
rain showers
thunderstorm
rain showers
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
6:26
—
—
6:28
—
—
6:28
—
—
6:28
—
—
6:28
—
—
6:28
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:29
—
—
6:28
—
—
6:27
—
—
6:25
—
—
6:24
—
—
6:23
—
—
6:22
—
 mm
1
2
2
1
2
3
4
23
8
5
12
6
5
4
3
4
4
3
—
3
Temp °C
26
25
26
26
26
26
26
26
25
26
25
26
26
26
26
27
26
26
26
26
Feels °C
24
23
25
25
27
27
26
26
25
26
27
28
28
29
27
28
29
26
26
27
  • 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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