Ammonias Surf Break

Lat Long: 21.95° N 159.35° W

Issued: 7 pm 02 Jul 2026 (local time)

Forecast update in  hr  min

Today's Ammonias sea temperature is
26.0° 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: Wednesday 8 Jul, 2AM (local time) - 7.5ft (2.3m), 8s period, ENE swell with 637 kJ wave energy.

Best Forecast Surf Conditions for Ammonias this week:

The most powerful waves expected at Ammonias in the next 16 days are 2.3m 8s and forecast to arrive on Wednesday (Jul 08) at 2AM. 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 Powerful 2AM (Wed 8th Jul)7.5ft (2.3m) 8s

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


Updates in  hr  min  s Forecast update imminent

G’day, I’m Rusty. Let me break down what’s coming at Ammonias over the next couple of weeks – and I won’t sugarcoat it, it’s a rough run.

This is a reef break that faces the open ocean, and it works best with swell from the SSE. But for this entire 16-day stretch, we’re stuck with cross-shore and cross-onshore winds that don’t give us a break. The water temperature is about normal for this time of year, nothing to write home about.

The forecast starts Friday morning, the 3rd of July. That first session is a total loss – rain showers, a 15 mph cross-on easterly wind, and the swell is a bumpy 5ft out of the ENE with only 8 seconds between waves. The combined energy sits at 639 – moderate energy, but the wind makes it impossible. Friday afternoon is the same story, 6ft and cross-shore, still terrible.

Then Saturday the 4th of July, things change. The swell direction swings to the south with a height of just 3ft, but look at this – the period jumps to 21 and 20 seconds. That’s very long-period groundswell. The energy readings are 1194 and 1018, so strong wave energy. The catch? It’s still a cross-shore wind at 15 mph, and the conditions are only marginal. That long-period groundswell at a reef can be special, but with the wind on it, it’s going to be choppy and hard to read. Honestly, this is the best we get across the entire 16 days – a real pity the wind isn’t right.

Sunday the 5th of July is similar, 3ft from the SSW with 18-second periods, but the rain comes back and the cross-shore wind hangs around, so it’s poor by the afternoon. From Monday the 6th of July straight through to Saturday the 11th of July, it’s a grind – 7ft of ENE short-period slop, cross-shore winds of 15 to 19 mph, and energy readings between 396 and 966. All of it is poor, just lumpy and unrideable.

There’s a gap starting after the 11th of July that runs for about a week – a long, quiet stretch of nothing but poor conditions. We get small swells from the SSW at 2ft to 3ft with decent periods from 14 to 18 seconds, but it’s all cross-shore or cross-onshore wind, moderate to fresh at 15 to 19 mph. The energy hangs between 228 and 572, which is weak to moderate, but none of it is worth paddling out for. Monday the 13th of July afternoon brings a 6ft ENE short-period pulse, but again, cross-shore and lumpy with a fresh breeze.

The last mention is Saturday the 18th of July morning – still 3ft of SSW short-period swell, still cross-onshore, still poor.

Mate, there isn’t a standout session here. The only glimmer was Saturday the 4th of July with that long-period south swell, but the wind killed it. This reef needs a clean offshore or glassy day, and we don’t get one. Keep watching the forecasts – things can turn around.

Rusty.

Short Range Forecast

Moderate rain (total 15mm), heaviest on Thu night. Warm (max 25°C on Fri morning, min 23°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 14mm), heaviest on Sun night. Warm (max 25°C on Mon morning, min 24°C on Sun night). Mainly fresh winds.

Friday
3
Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thu
9
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
1
0
0
1
1
2
2
1
0
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
ENE
8
1.6
ENE
8
1.7
ENE
8
1.8
ENE
8
0.8
S
21
0.8
S
20
0.9
SSW
19
0.9
SSW
18
0.9
SSW
18
2.1
ENE
8
2.1
ENE
8
2
ENE
8
2
ENE
8
2.1
ENE
8
2.1
ENE
8
2.3
ENE
8
2.1
ENE
8
1.9
ENE
8
1.8
ENE
7
2
ENE
7
1.7
ENE
7
Wave Graph
Metric surfscale
Energy kJ
353
302
327
382
573
490
608
522
510
487
469
481
439
536
514
637
509
408
363
417
327
Wind (km/h)
25
ENE
25
ENE
25
ENE
20
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
30
ENE
30
NE
30
ENE
25
NE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
Wind State
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross
High Tide
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
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
clear
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
1
2
2
2
2
1
1
4
1
1
3
1
4
1
2
Temp °C
24
25
25
24
25
25
24
25
25
24
25
25
24
25
25
24
25
25
24
25
25
Feels °C
23
24
24
23
23
23
23
23
23
22
23
23
22
23
23
22
24
23
23
24
24
Swell 1
Height (m)
Direction
Period (s)
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
0.6
S
12
Energy kJ
118
232
216
147
573
490
608
522
510
437
446
481
355
350
341
331
247
239
168
151
108
Swell 2
Height (m)
Direction
Period (s)
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
0.5
SE
8
0.4
SSE
8
0.5
SE
8
Energy kJ
163
67
62
93
193
148
188
138
20
69
21
20
19
18
17
17
18
17
32
26
31
Swell 3
Height (m)
Direction
Period (s)
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.5
S
23
0.4
SSW
12
0.4
SW
12
0.4
SE
10
0.3
SE
9
0.2
SSW
11
0.4
SE
8
0.2
S
20
0.1
SE
10
0.1
NW
9
0.1
SE
10
0.1
W
19
0.1
S
18
0.2
W
17
0.2
W
16
0.3
W
15
Energy kJ
39
38
37
260
56
35
24
13
12
18
30
4
3
4
7
6
23
20
38
Wind waves
Height (m)
Direction
Period (s)
1.8
ENE
8
1.6
ENE
8
1.7
ENE
8
1.8
ENE
8
1.8
ENE
8
1.7
ENE
8
1.7
ENE
8
2
ENE
7
1.7
ENE
7
2.1
ENE
8
2.1
ENE
8
2
ENE
8
2
ENE
8
2.1
ENE
8
2.1
ENE
8
2.3
ENE
8
2.1
ENE
8
1.9
ENE
8
1.8
ENE
7
2
ENE
7
1.7
ENE
7
Energy kJ
353
302
327
382
372
345
327
435
310
487
469
471
439
536
514
637
509
408
363
417
327
Nearest Offshore or Glassy
Rating
(10 max)
2
3
2
2
3
3
3
3
3
3
3
3
2
2
3
2
3
3
2
2
1
Distance (km)
16
31
16
16
31
16
16
31
33
31
31
33
31
31
31
16
31
31
16
31
16
Best forecast wave conditions in Kaua'i
Rating
(10 max)
2
3
2
2
3
3
3
3
3
3
3
3
2
2
3
3
3
3
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
2
3
2
3
3
3
3
3
3
3
3
3
4
2
3
4
3
3
4
3
3
Header Global
Rating
(10 max)
5
8
5
4
5
5
9
6
7
6
9
7
5
6
9
9
9
6
5
6
6
  • 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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