Ammonias Surf Break

Lat Long: 21.95° N 159.35° W

Issued: 1 pm 02 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ammonias sea temperature is
25.9° 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 3 Jul 2026:

  • Most powerful swell: Saturday 4 Jul, 11PM (local time) - 3ft (0.9m), 19s period, SSW swell with 627 kJ wave energy.

Best Forecast Surf Conditions for Ammonias this week:

The most powerful waves expected at Ammonias in the next 16 days are 0.9m 19s and forecast to arrive on Saturday (Jul 04) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Sat 4th Jul)3ft (0.9m) 19s

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


Updates in  hr  min  s Forecast update imminent

Alright folks, Rusty here. I've taken a hard look at what's on offer at Ammonias over the next 16 days, and to be straight with you – it's pretty grim. The guidance tells me this reef break can be a good one when conditions line up, with a preference for SSE swell and a clean NW offshore. But over this whole window, I'm seeing almost nothing that's worth paddling out for. The wind is stuck in a cross or cross‑on groove, and the swell direction is mostly ENE – the complete opposite of what this spot loves. There's no standout session, no hidden gem. Just a long, scratchy run of poor surf.

Thursday 2nd July starts things off with a 5‑foot ENE swell, but it's 8‑second short‑period junk, cross‑shore wind at 15 mph, and the water temp is 79° – pretty average for the time of year. The combined energy is moderate (556) but it's all chop and no shape. That pattern continues into Friday with slightly bigger 5–6‑foot ENE swell, same wind, same poor quality.

Saturday 4th brings a switch – a 3‑foot south swell with a very long 21‑second period. That's groundswell, and the energy jumps to a solid 1184 (strong). On paper that sounds promising for a reef, but the cross‑shore wind is still 15 mph, so the surface will be messy. The score is marginal at best – you might find a few cleanish waves if you're patient, but it's hardly a call‑out. Sunday 5th sees a similar 3‑foot SSW swell, period 18 seconds, still cross‑shore wind – another marginal day with scores of 1 out of 10. Those two days are the closest this forecast gets to something surfable, and they're still far from good.

From Monday 6th onward it goes downhill fast. The swell jumps to 7‑foot ENE, but it's all short‑period windswell with a fresh 19 mph cross‑shore breeze. That's big enough to be intimidating for beginners, and the chop will be lumpy. The scores are zeros and ones. For the rest of the first week and into the second week – Tuesday 7th through to Thursday 16th July – it's a relentless run of 4–7‑foot ENE or NE swell, with periods of 7–8 seconds, and steady 15–19 mph cross or cross‑onshore wind. The combined energy ranges from moderate to strong (350–1000), but the quality is consistently poor. There's a brief window on 13th and 14th July with a smaller 2–3‑foot SSW swell and a long 14‑second period, but again the wind is cross‑onshore and the forecast calls it poor.

Friday 17th July finishes the outlook with a 3‑foot east swell of 6 seconds and a 3‑foot SSE swell of 8 seconds – both with cross‑shore wind and poor conditions. No recommendations, no standouts, nothing to get excited about.

I know it's frustrating when a break like Ammonias goes quiet, but this spot is fairly consistent in general – a blank run like this is unusual but not unheard of. Forecasts can change, and I'll keep an eye on it. For now, save the wax for another week.

– Rusty

Short Range Forecast

Moderate rain (total 10mm), heaviest on Thu night. Warm (max 25°C on Thu afternoon, min 23°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 16mm), heaviest on Sun afternoon. Warm (max 25°C on Sun afternoon, min 23°C on Mon night). Mainly fresh winds.

Thu
2
Friday
3
Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
1
1
0
1
2
2
2
1
0
0
0
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
ENE
8
1.8
ENE
8
1.6
ENE
8
1.7
ENE
8
1.9
ENE
8
0.8
S
21
0.8
S
20
0.9
SSW
19
0.9
SSW
18
0.9
SSW
18
0.9
SSW
16
2.1
ENE
8
2.1
ENE
8
2.1
ENE
8
2
ENE
8
2
ENE
8
2
ENE
8
2
ENE
8
1.9
ENE
8
1.8
ENE
7
1.9
ENE
7
Wave Graph
Metric surfscale
Energy kJ
278
362
285
327
410
573
490
608
522
510
437
481
536
514
496
475
464
464
397
349
400
Wind (km/h)
25
ENE
20
ENE
25
ENE
25
ENE
20
ENE
25
ENE
25
ENE
20
ENE
25
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
NE
30
ENE
25
ENE
25
ENE
25
NE
20
ENE
25
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross-on
cross-on
High Tide
5:48PM0.62m
5:30AM0.21m
6:17PM0.59m
6:37AM0.22m
6:44PM0.55m
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
Low Tide
1:03AM0.11m
10:47AM0.04m
1:33AM0.09m
11:30AM0.10m
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
part cloud
rain showers
rain showers
rain showers
rain showers
part cloud
part cloud
part cloud
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
5:58
5:58
5:58
5:58
6:00
6:00
<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
1
1
2
4
2
2
3
1
1
4
1
1
2
1
1
3
2
Temp °C
25
24
25
25
24
25
25
24
25
25
24
25
25
24
25
25
24
25
25
24
25
Feels °C
24
23
24
24
23
23
23
23
23
23
22
23
23
22
23
23
22
23
23
23
24
Swell 1
Height (m)
Direction
Period (s)
0.6
SSW
13
0.6
SSW
13
0.6
SSW
17
0.6
SSW
17
0.5
SSW
16
0.8
S
21
0.8
S
20
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
0.9
SSW
14
0.8
SSW
14
0.8
SSW
13
0.7
S
13
0.7
S
12
Energy kJ
120
118
232
216
147
573
490
608
522
510
437
446
481
355
350
341
331
243
239
168
151
Swell 2
Height (m)
Direction
Period (s)
0.5
SE
9
0.5
S
18
0.4
SSW
13
0.4
SSW
13
0.5
SSW
13
0.6
SSW
16
0.6
SSW
15
0.7
SSW
15
0.6
SSW
14
0.4
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
0.4
SE
8
0.4
SE
8
0.4
SE
8
0.4
SE
8
0.3
SE
8
Energy kJ
40
163
67
62
93
193
148
188
138
20
69
21
20
19
18
18
18
18
17
17
11
Swell 3
Height (m)
Direction
Period (s)
0.4
SSW
19
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.5
S
23
0.4
SSW
12
0.4
SE
10
0.3
SE
10
0.3
SE
9
0.2
SSW
11
0.3
SE
9
0.2
S
20
0.1
S
11
0.1
NW
9
0.1
SE
10
0.1
W
19
0.1
S
18
0.2
W
17
0.3
W
16
Energy kJ
118
39
38
37
260
56
33
15
12
12
12
30
2
3
4
7
6
23
44
Wind waves
Height (m)
Direction
Period (s)
1.5
ENE
8
1.8
ENE
8
1.6
ENE
8
1.7
ENE
8
1.9
ENE
8
1.8
ENE
8
1.7
ENE
8
1.7
ENE
8
1.9
ENE
8
1.8
ENE
8
2
ENE
7
2.1
ENE
8
2.1
ENE
8
2.1
ENE
8
2
ENE
8
2
ENE
8
2
ENE
8
2
ENE
8
1.9
ENE
8
1.8
ENE
7
1.9
ENE
7
Energy kJ
278
362
285
327
410
362
345
327
419
353
417
481
536
514
496
475
464
464
397
349
400
Nearest Offshore or Glassy
Rating
(10 max)
2
2
3
2
2
3
3
3
3
3
2
2
3
2
2
3
1
3
3
2
2
Distance (km)
31
16
31
16
16
31
16
16
33
33
38
31
38
38
31
38
126
31
33
33
33
Best forecast wave conditions in Kaua'i
Rating
(10 max)
2
2
3
2
3
3
3
3
3
3
2
2
3
2
2
3
3
3
2
2
Best forecast wave conditions in United States
Rating
(10 max)
3
2
3
2
3
3
3
3
3
3
3
2
3
3
2
3
4
3
3
4
2
Header Global
Rating
(10 max)
9
5
9
5
6
8
5
9
7
5
9
9
8
6
5
9
9
9
5
5
6
  • Map Icons:
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  • 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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