Ammonias Surf Break

Lat Long: 21.95° N 159.35° W

Issued: 1 am 06 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ammonias sea temperature is
26.3° 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 6 Jul 2026:

  • Most powerful swell: Tuesday 7 Jul, 8AM (local time) - 8ft (2.4m), 8s period, ENE swell with 653 kJ wave energy.

Best Forecast Surf Conditions for Ammonias this week:

The most powerful waves expected at Ammonias in the next 16 days are 2.4m 8s and forecast to arrive on Tuesday (Jul 07) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 8s period and expected on Sunday (Jul 12) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8AM (Tue 7th Jul)8ft (2.4m) 8s

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


Updates in  hr  min  s Forecast update imminent

Alright, Rusty here again. Let's break it down in the old units.

Honestly, the next couple of weeks at Ammonias are looking pretty rough. We've got a long stretch of messy conditions ahead. The water temp is 79°, which is about normal for this time of year, so that's one small blessing.

The first big dry spell runs from Monday, July 6th, right through to the afternoon of Sunday, July 12th. The wind is howling out of the ENE at 15 to 19 mph, either cross or cross-onshore, just tearing the surface apart. The swell is hanging around 7 ft to 8 ft, but it's short-period ENE windswell, 7 to 8 seconds. The combined wave energy is moderate to strong (1019-538), but it's just lumpy, cross-chop. No clean waves to be had.

We get a tiny break on the morning of Sunday, July 12th, with a 3 ft SSW swell and a very long 16-second period, but the energy is weak (413) and the wind is still cross. Not worth it.

The next window is Monday, July 13th, through Tuesday, July 14th. The swell drops to 4 ft to 6 ft, and the wind lightens a bit to 9 to 12 mph from the ENE. It's still cross, but conditions are "marginal" instead of "poor." The energy is moderate (760-383). This is the best of the bunch, but it's not a standout. The swell is still short-period windswell, so it'll be weak and short.

After that, from Wednesday, July 15th, it's back to poor conditions with cross-onshore winds. The swell drops to 2 ft to 2 ft, and even with a long-period 16 to 19-second groundswell on the 16th and 21st, the energy is moderate (426-638) and the wind is ruining it. The 21st has a promising 2 ft E swell with a 19-second period, but the cross-wind will make it a blown-out mess.

The best on offer is Monday, July 13th, and Tuesday, July 14th. The wind is lightest (9 to 12 mph) and conditions are just "marginal." The swell is 4 ft to 6 ft from the ENE, which is too big for beginners, and the short period (7 seconds) means it'll be gutless. It's a reef break, so it handles some size, but the wind direction doesn't match the optimum swell direction (SSE), so it's going to be a frustrating paddle. You can expect crowds here, and with this forecast, it'll be a local-only affair.

It's a pretty normal run of poor conditions for this area. The forecasts can change, but right now, I'd leave the board in the garage. The long period swells are a tease, but they're not coming with clean wind.

Rusty.

Short Range Forecast

Moderate rain (total 17mm), heaviest on Mon morning. Warm (max 25°C on Mon afternoon, min 23°C on Mon night). Mainly fresh winds.

Days 4-6 Weather Summary

Heavy rain (total 29mm), heaviest during Fri afternoon. Warm (max 26°C on Thu afternoon, min 24°C on Thu morning). Mainly fresh winds.

Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
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
1
0
1
0
0
0
0
1
0
0
1
0
0
0
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.2
ENE
7
2.1
ENE
8
2.2
ENE
8
2.4
ENE
8
2.1
ENE
8
2.1
ENE
8
2.1
ENE
8
2
ENE
8
2
ENE
7
1.9
ENE
7
1.9
ENE
8
2
ENE
7
2
ENE
7
2
ENE
7
2.3
ENE
7
2.1
ENE
8
1.8
ENE
8
0.7
SW
17
0.8
SSW
16
1.9
ENE
8
2.1
ENE
8
Wave Graph
Metric surfscale
Energy kJ
522
514
551
653
541
469
509
452
440
400
411
415
428
405
545
487
372
309
326
447
487
Wind (km/h)
30
ENE
30
NE
30
ENE
30
ENE
25
NE
25
ENE
25
ENE
30
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
30
ENE
25
ENE
30
ENE
30
ENE
25
ENE
25
ENE
25
ENE
20
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
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
1:06AM0.18m
3:04PM0.77m
2:08AM0.19m
Low Tide
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
10:03PM0.14m
7:03AM-0.10m
10:34PM0.12m
rain showers
clear
rain showers
rain showers
part cloud
rain showers
rain showers
rain showers
rain showers
rain showers
clear
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
cloud
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
5:58
6:00
6:00
6:00
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
2
3
1
4
2
2
3
1
2
2
4
6
4
3
7
1
Temp °C
24
25
24
24
25
24
25
25
24
25
26
24
25
25
24
25
25
24
25
25
24
Feels °C
22
22
22
21
23
22
23
23
22
24
25
23
24
24
23
24
24
23
24
24
24
Swell 1
Height (m)
Direction
Period (s)
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
S
13
0.7
S
13
0.6
S
12
0.6
S
12
0.5
S
12
0.6
S
12
0.5
S
11
0.5
SW
19
0.6
SSW
18
0.7
SW
18
0.7
SW
17
0.8
SSW
16
0.9
SW
16
0.9
SW
16
Energy kJ
446
481
355
350
341
265
247
229
168
112
110
75
99
66
184
214
316
309
326
367
353
Swell 2
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
9
0.4
SE
8
0.3
SE
8
0.4
SE
8
0.3
SE
9
0.4
SE
8
0.3
SE
8
0.4
SE
8
0.3
W
13
0.4
W
14
0.4
W
13
0.5
S
11
0.4
S
12
0.4
S
12
0.5
SE
8
0.5
SE
8
0.5
SE
8
0.4
SSE
12
Energy kJ
21
20
19
19
18
11
18
12
18
11
17
30
65
55
61
44
44
33
34
30
48
Swell 3
Height (m)
Direction
Period (s)
0.2
S
20
0.1
SE
10
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
0.2
S
15
0.3
SE
8
0.4
SW
20
0.4
W
14
0.4
W
14
0.4
W
13
0.4
S
13
0.4
SSE
13
0.4
SSE
12
0.4
SE
8
Energy kJ
30
4
3
2
2
5
6
17
15
32
17
10
102
59
61
54
51
53
49
21
Wind waves
Height (m)
Direction
Period (s)
2.2
ENE
7
2.1
ENE
8
2.2
ENE
8
2.4
ENE
8
2.1
ENE
8
2.1
ENE
8
2.1
ENE
8
2
ENE
8
2
ENE
7
1.9
ENE
7
1.9
ENE
8
2
ENE
7
2
ENE
7
2
ENE
7
2.3
ENE
7
2.1
ENE
8
1.8
ENE
8
1.8
NE
8
1.8
NE
8
1.9
ENE
8
2.1
ENE
8
Energy kJ
522
514
551
653
541
469
509
452
440
400
411
415
428
405
545
487
372
358
398
447
487
Nearest Offshore or Glassy
Rating
(10 max)
3
2
2
2
2
3
3
3
2
2
2
2
1
1
3
3
2
2
2
2
2
Distance (km)
33
31
31
33
31
31
31
33
16
33
33
16
16
31
38
33
31
16
31
31
16
Best forecast wave conditions in Kaua'i
Rating
(10 max)
3
2
2
2
2
3
3
3
2
2
2
2
2
1
3
3
2
2
2
2
3
Best forecast wave conditions in United States
Rating
(10 max)
3
2
2
2
2
4
3
3
4
3
2
4
4
1
3
3
2
3
3
3
3
Header Global
Rating
(10 max)
8
7
5
5
9
8
9
9
5
6
6
5
8
6
5
5
5
9
9
7
4
  • 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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