Ammonias Surf Break

Lat Long: 21.95° N 159.35° W

Issued: 7 pm 04 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ammonias sea temperature is
26.2° C

Normal for this time of year

Ammonias surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Ammonias surf forecast from 5 Jul 2026:

  • Most powerful swell: Saturday 11 Jul, 2AM (local time) - 8ft (2.5m), 8s period, ENE swell with 806 kJ wave energy.

Best Forecast Surf Conditions for Ammonias this week:

The most powerful waves expected at Ammonias in the next 16 days are 2.5m 8s and forecast to arrive on Saturday (Jul 11) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 13s period and expected on Friday (Jul 10) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Sat 11th Jul)8ft (2.5m) 8s

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


Updates in  hr  min  s Forecast update imminent

Listen up, fellas, let’s get the story straight on Ammonias for the next couple of weeks.

To be honest, it’s a rough patch. We’ve got swell, sure, but the wind is just going to ruin it for us. There’s no single day that’s jumping out as the one to chase. The first week is nearly all cross-shore breeze, making for a lumpy, cross-chop on the face. It’s gonna be a battle, not a smooth ride.

Starting Sunday, July 5th, we’ve got a long-period groundswell from the SSW, about 3ft with an 18-second interval. That’s quality energy, but a cross-shore wind at 15-19 mph is going to tear the surface up. The combined energy is moderate (1055). By Monday the 6th, the swell picks up to around 7ft, but the period drops to a weak 7 seconds from the ENE, with the same cross-shore wind at 15-19 mph. That’s just short-period windswell, and it’s going to be a mess. This pattern of 6-8ft ENE windswell with cross-shore winds runs all the way through Saturday the 11th. The energy is moderate, but the quality is poor. The wave state keeps calling it “lumpy” or “choppy.” No clean windows here.

We see a switch on Sunday the 12th of July with a longer-period SW groundswell, about 3ft at a 16-second period. The combined energy is still moderate (773). But the wind is still cross-shore, so it’s going to be bumpy. By Monday the 13th, it drops to about 3ft from the SSW. Not enough to get stoked about, especially with the same wind.

After that, it’s back into a long run of short-period ENE windswell from the 14th to the 20th of July. Swell sizes hang between 5ft and 6ft, but the period is short at 6-7 seconds. The wind stays cross to cross-on, keeping the ocean choppy. The wave energy is still moderate but dropping into the weak range by the end.

What you need to know: There’s no five-star day in this forecast, mate. The swell is there, but the wind is the enemy. The best bet is to try and find a morning session before the wind really picks up, but it’s still marginal. Honestly, this setup looks way more interesting for a kite session than a paddle. Sit tight and wait for a better forecast.

Rusty

Short Range Forecast

Moderate rain (total 13mm), heaviest on Sat night. Warm (max 25°C on Sun afternoon, min 23°C on Mon night). Mainly fresh winds.

Days 5-7 Weather Summary

Light rain (total 8mm), mostly falling on Tue night. Warm (max 26°C on Wed afternoon, min 24°C on Tue night). Wind will be generally light.

Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Sat
11
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
2
1
0
0
1
1
0
1
0
0
0
0
1
0
1
1
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)
0.9
SSW
19
0.9
SSW
18
0.9
SSW
18
0.9
SSW
16
2.2
ENE
7
2.2
ENE
8
2.3
ENE
8
2.3
ENE
8
2.1
ENE
8
2.1
ENE
8
2.1
ENE
8
1.9
ENE
7
1.9
ENE
7
1.8
ENE
7
1.9
ENE
7
1.9
ENE
7
2.1
ENE
7
2.1
ENE
7
2.5
ENE
8
2.5
ENE
8
2.2
ENE
8
Wave Graph
Metric surfscale
Energy kJ
608
522
510
437
516
581
613
645
507
509
495
387
390
344
379
400
469
456
806
691
531
Wind (km/h)
25
ENE
25
ENE
30
ENE
25
ENE
30
ENE
25
NE
30
ENE
25
NE
25
ENE
30
ENE
25
ENE
25
ENE
20
ENE
25
ENE
25
ENE
20
ENE
25
ENE
25
ENE
25
ENE
30
ENE
25
NE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross
cross
cross
cross-on
cross
cross
High Tide
8:00AM0.26m
7:11PM0.49m
9:31AM0.32m
7:37PM0.42m
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
Low Tide
2:02AM0.07m
12:26PM0.17m
2:33AM0.05m
1:48PM0.24m
3:07AM0.02m
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
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
rain showers
part cloud
clear
clear
clear
clear
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
5:58
5:58
6:00
6:00
6:00
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
7:23
 mm
2
2
2
1
1
1
3
1
2
2
2
2
9
3
Temp °C
24
24
25
24
24
25
24
24
25
24
25
26
24
25
26
24
25
26
25
24
25
Feels °C
23
23
24
22
22
22
22
22
22
22
23
24
23
24
25
23
25
26
25
23
24
Swell 1
Height (m)
Direction
Period (s)
0.9
SSW
19
0.9
SSW
18
0.9
SSW
18
0.9
SSW
16
0.9
SSW
16
1
SSW
15
0.9
SSW
15
0.9
SSW
14
0.9
SSW
14
0.8
SSW
14
0.8
SSW
14
0.8
SSW
13
0.7
S
13
0.7
S
12
0.6
S
12
0.6
S
12
0.5
S
12
0.5
S
12
0.5
SW
19
0.6
SSW
18
0.7
SW
18
Energy kJ
608
522
510
437
446
481
355
350
341
265
247
239
168
151
108
106
70
67
184
216
316
Swell 2
Height (m)
Direction
Period (s)
0.7
SSW
15
0.6
SSW
14
0.3
SE
9
0.4
SSW
13
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
8
0.4
SE
8
0.3
SE
8
0.4
SE
9
0.3
SE
8
0.4
SE
8
0.4
SSE
8
0.6
SE
8
0.4
SE
6
0.3
W
15
0.4
W
13
0.5
S
11
0.4
S
12
0.4
W
13
Energy kJ
188
138
13
69
21
20
19
18
18
11
20
11
23
26
50
9
39
55
61
44
55
Swell 3
Height (m)
Direction
Period (s)
0.3
SE
10
0.3
SE
9
0.2
SSW
11
0.4
SE
9
0.2
S
20
0.1
S
11
0.1
NW
9
0.1
N
9
0.1
W
9
0.1
W
16
0.1
S
18
0.2
W
15
0.2
W
14
0.3
W
14
0.4
W
13
0.3
W
13
0.4
SW
20
0.4
W
14
0.4
W
14
0.4
S
12
Energy kJ
15
13
12
20
30
2
3
2
2
5
6
17
15
32
54
28
101
58
63
44
Wind waves
Height (m)
Direction
Period (s)
1.7
ENE
8
1.8
ENE
8
2
ENE
7
1.9
ENE
7
2.2
ENE
7
2.2
ENE
8
2.3
ENE
8
2.3
ENE
8
2.1
ENE
8
2.1
ENE
8
2.1
ENE
8
1.9
ENE
7
1.9
ENE
7
1.8
ENE
7
1.9
ENE
7
1.9
ENE
7
2.1
ENE
7
2.1
ENE
7
2.5
ENE
8
2.5
ENE
8
2.2
ENE
8
Energy kJ
327
382
435
369
516
581
613
645
507
509
495
387
390
344
379
400
469
456
806
691
531
Nearest Offshore or Glassy
Rating
(10 max)
3
3
3
2
3
2
2
2
3
3
3
3
2
2
1
1
2
2
2
3
3
Distance (km)
16
31
33
38
31
31
31
31
31
38
31
31
16
31
16
16
31
16
16
38
31
Best forecast wave conditions in Kaua'i
Rating
(10 max)
3
3
3
2
3
2
2
2
3
3
3
3
3
2
2
1
2
2
2
3
3
Best forecast wave conditions in United States
Rating
(10 max)
3
3
3
3
3
2
3
2
3
4
3
3
4
3
3
4
4
3
3
3
3
Header Global
Rating
(10 max)
9
7
5
6
8
7
5
5
9
8
9
9
5
6
6
5
8
7
4
9
9
  • 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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