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Surf Forecasts:

Ammonias surfForecast / HAW – Kaua'i / USA

information circle16 Day Weather and Surf, issued 1 am Sunday 17 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Ammonias surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Ammonias sea temperature is
24.7° C
 (Which is normal for this time of year)

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 Friday (May 22) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 12s period and expected on Wednesday (May 20) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Fri 22nd May)8ft (2.5m) 8s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table

Short Range Forecast

Heavy rain (total 20mm), heaviest during Sun night. Warm (max 25°C on Sun morning, min 23°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Wed afternoon. Warm (max 24°C on Wed morning, min 22°C on Thu night). Mainly fresh winds.

Sunday
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
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
0
1
1
0
1
1
0
0
0
1
0
1
1
1
1
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SSW
15
0.8
SSW
15
1.6
ENE
8
1.8
ENE
8
1.9
ENE
8
1.6
ENE
8
1.5
ENE
8
0.9
SSW
15
1.8
ENE
8
1.9
ENE
8
2.2
ENE
8
2.4
ENE
8
2.5
ENE
8
2.3
ENE
8
2.5
ENE
8
2.3
ENE
8
2.5
ENE
8
2.5
ENE
8
2.4
ENE
8
2.3
ENE
8
2.4
ENE
8
Wave Graph
Metric surfscale
Energy kJ
264
249
344
394
416
306
234
305
356
449
569
745
804
686
956
758
789
931
789
748
782
Wind (km/h)
20
ENE
20
ENE
20
E
25
ENE
20
ENE
20
ENE
20
ENE
25
ENE
25
ENE
25
ENE
30
ENE
25
ENE
30
NE
30
NE
30
ENE
30
ENE
30
NE
25
ENE
30
NE
30
ENE
30
ENE
Wind State
cross
cross
cross-on
cross-on
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
High Tide
4:56PM0.72m
3:55AM0.15m
5:47PM0.71m
4:48AM0.13m
6:40PM0.67m
6:00AM0.12m
7:36PM0.62m
7:44AM0.13m
8:32PM0.57m
9:38AM0.17m
9:27PM0.51m
11:10AM0.24m
10:17PM0.45m
Low Tide
9:06AM-0.15m
00:21AM0.09m
9:49AM-0.13m
1:27AM0.09m
10:35AM-0.09m
2:35AM0.09m
11:26AM-0.04m
3:37AM0.08m
12:26PM0.03m
4:25AM0.06m
1:41PM0.10m
5:01AM0.04m
3:18PM0.16m
clear
clear
rain showers
thunderstorm
thunderstorm
clear
rain showers
thunderstorm
rain showers
clear
rain showers
rain showers
rain showers
clear
rain showers
clear
rain showers
clear
rain showers
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
—
—
5:56
—
—
5:56
—
—
5:56
—
—
5:56
—
—
5:54
—
—
5:54
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
7:09
—
—
7:09
—
—
7:10
—
—
7:10
—
—
7:12
—
—
7:12
—
—
7:13
—
 mm
—
—
5
4
3
—
4
3
1
—
1
3
1
—
2
—
2
—
1
1
3
Temp °C
25
25
24
24
24
23
24
25
23
24
24
23
24
24
23
23
23
23
23
23
23
Feels °C
26
26
25
24
23
23
24
25
23
23
22
21
21
21
20
20
20
20
19
20
20
Swell 1
Height (m)
Direction
Period (s)
1
SE
10
1.3
ENE
8
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.7
SSW
13
0.8
SSW
14
0.9
SSW
15
0.8
SSW
14
0.6
SSW
14
0.6
SSW
14
0.5
SSW
13
0.5
S
16
0.5
S
16
0.6
S
15
0.5
S
15
0.5
S
14
0.6
S
16
0.6
S
16
0.7
S
15
0.6
S
15
Energy kJ
181
237
239
233
166
158
229
305
239
165
152
101
134
129
157
109
94
188
181
218
155
Swell 2
Height (m)
Direction
Period (s)
0.8
SSW
15
0.9
SSE
11
0.6
SSE
8
0.6
SSW
19
0.5
SE
10
0.4
SSW
17
0.5
SSW
18
0.6
SSE
9
0.4
SE
7
0.4
SE
9
0.3
NNW
11
0.5
S
17
0.4
SSW
13
0.4
SE
8
0.4
SE
13
0.4
S
18
0.5
S
18
0.5
S
13
0.4
SSW
13
0.4
SE
10
0.3
SE
10
Energy kJ
249
204
37
251
49
92
176
56
13
21
23
142
70
18
42
102
154
90
57
23
14
Swell 3
Height (m)
Direction
Period (s)
0.4
SSE
11
0.8
SSW
15
0.6
SSE
10
0.6
SSE
7
0.5
SSW
19
0.4
SSE
7
0.6
SSE
10
0.4
NW
11
0.4
NNW
12
0.3
NNW
11
0.4
SE
8
0.3
SE
7
0.4
SE
14
0.4
SE
13
0.2
SSW
12
0.4
SE
12
0.4
SE
12
0.4
SE
12
0.4
SE
10
0.2
SSE
12
0.2
NNW
14
Energy kJ
48
249
69
37
212
21
61
30
55
25
15
8
46
44
14
37
37
37
27
14
18
Wind waves
Height (m)
Direction
Period (s)
1.4
ENE
8
—
1.6
ENE
8
1.8
ENE
8
1.9
ENE
8
1.6
ENE
8
1.5
ENE
8
1.6
ENE
7
1.8
ENE
8
1.9
ENE
8
2.2
ENE
8
2.4
ENE
8
2.5
ENE
8
2.3
ENE
8
2.5
ENE
8
2.3
ENE
8
2.5
ENE
8
2.5
ENE
8
2.4
ENE
8
2.3
ENE
8
2.4
ENE
8
Energy kJ
264
—
344
394
416
306
234
245
356
449
569
745
804
686
956
758
789
931
789
748
782
Nearest Offshore or Glassy
Acid Drops
HAW - Kaua'i
Infinities
HAW - Kaua'i
Infinities
HAW - Kaua'i
Infinities
HAW - Kaua'i
Infinities
HAW - Kaua'i
Acid Drops
HAW - Kaua'i
Infinities
HAW - Kaua'i
Acid Drops
HAW - Kaua'i
Majors Bay
HAW - Kaua'i
Waimea Rivermouth
HAW - Kaua'i
Davidson Point
HAW - Kaua'i
Davidson Point
HAW - Kaua'i
Infinities
HAW - Kaua'i
Davidson Point
HAW - Kaua'i
Majors Bay
HAW - Kaua'i
Waimea Rivermouth
HAW - Kaua'i
Infinities
HAW - Kaua'i
Acid Drops
HAW - Kaua'i
Infinities
HAW - Kaua'i
Waimea Rivermouth
HAW - Kaua'i
Davidson Point
HAW - Kaua'i
Rating
(10 max)
2
2
2
2
3
2
3
2
1
2
3
3
3
3
3
3
2
2
3
3
3
Distance (km)
16
31
31
31
31
16
31
16
46
33
38
38
31
38
46
33
31
16
31
33
38
Best forecast wave conditions in Kaua'i
Pakalas
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Pakalas
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Infinities
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Rating
(10 max)
3
2
2
2
3
3
3
2
1
2
3
3
3
3
3
3
2
3
3
3
3
Best forecast wave conditions in United States
Steamer Lane-The Point
CAL - Santa Cruz
El Capitan
CAL - Santa Barbara
Ghost Tree
CAL - Monterey
Cortez Bank
CAL - San Diego County
Fullers
CAL - Monterey
Cortez Bank
CAL - San Diego County
Cortez Bank
CAL - San Diego County
Cojo
CAL - Santa Barbara
Boners
CAL - San Luis Obispo
Fullers
CAL - Monterey
Majors Bay
HAW - Kaua'i
Moonstone Beach
CAL - Humboldt
Government Point
CAL - Santa Barbara
Gale Point
CAL - Humboldt
Ghost Tree
CAL - Monterey
Majors Bay
HAW - Kaua'i
Kahalu'u
HAW - Big Island
Gale Point
CAL - Humboldt
Majors Bay
HAW - Kaua'i
Majors Bay
HAW - Kaua'i
Moonstone Beach
CAL - Humboldt
Rating
(10 max)
6
4
5
4
3
4
3
3
4
4
3
4
3
4
3
3
2
4
3
3
4
Header Global
Steamer Lane-The Point
United States
Bali Village
Indonesia
Ghost Tree
United States
Beach Road
South Africa
Bali Village
Indonesia
Bali Village
Indonesia
Bankvaults
Indonesia
Bali Village
Indonesia
Afife
Portugal
Trial Harbour
Australia
Anglet - Corsaires
France
Trial Harbour
Australia
Lambe Lambe
Brazil
Angourie Point
Australia
Bawley Point
Australia
Itaúna
Brazil
Lennox Head
Australia
Barra de Guaratiba
Brazil
Papatowai
New Zealand
Beach Road
South Africa
Barra de Guaratiba
Brazil
Rating
(10 max)
6
4
5
4
4
4
4
4
4
5
4
5
5
4
4
5
6
4
5
4
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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