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Surf Forecasts:

Ammonias surfForecast / HAW – Kaua'i / USA

information circle16 Day Weather and Surf, issued 7 pm Tuesday 19 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
25.2° 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 3.0m 8s and forecast to arrive on Friday (May 22) at 2AM. 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 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Fri 22nd May)10ft (3.0m) 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

Moderate rain (total 10mm), heaviest on Tue night. Warm (max 25°C on Wed morning, min 23°C on Tue night). Mainly fresh winds.

Days 5-7 Weather Summary

Moderate rain (total 12mm), heaviest on Fri night. Warm (max 24°C on Sat morning, min 22°C on Fri night). Mainly fresh winds.

Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Monday
25
Tue
26
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
0
1
1
1
1
1
1
0
1
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)
0.8
SSW
15
2
ENE
8
2.1
ENE
8
2.3
ENE
8
2.5
ENE
8
2.5
ENE
8
3
ENE
8
2.5
ENE
9
2.4
ENE
9
2.5
ENE
8
2.4
ENE
8
2.5
ENE
8
2.5
ENE
9
2.3
ENE
8
2.4
ENE
8
2.2
ENE
8
2.3
ENE
8
2.4
ENE
8
2.2
ENE
8
2.1
ENE
8
1.8
ENE
8
Wave Graph
Metric surfscale
Energy kJ
268
472
520
671
893
932
1123
953
839
870
782
837
877
722
782
646
688
770
604
555
423
Wind (km/h)
25
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
NE
35
NE
30
NE
30
ENE
30
ENE
25
ENE
30
ENE
25
ENE
25
ENE
30
ENE
30
ENE
25
ENE
25
ENE
25
NE
Wind State
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross
cross
cross
cross
High Tide
6:00AM0.12m
7:36PM0.62m
7:44AM0.13m
8:32PM0.57m
9:38AM0.17m
9:27PM0.51m
11:10AM0.24m
10:17PM0.45m
12:15PM0.33m
11:02PM0.39m
1:03PM0.41m
11:43PM0.33m
1:43PM0.49m
Low Tide
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
5:30AM0.02m
5:07PM0.20m
5:54AM-0.01m
6:46PM0.21m
6:17AM-0.03m
thunderstorm
rain showers
rain showers
rain showers
part cloud
rain showers
part cloud
rain showers
rain showers
rain showers
clear
rain showers
rain showers
clear
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>
—
5:56
—
—
5:56
—
—
5:54
—
—
5:54
—
—
5:54
—
—
5:54
—
—
5:54
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:10
—
7:10
—
—
7:12
—
—
7:12
—
—
7:13
—
—
7:13
—
—
7:13
—
—
7:14
 mm
1
1
1
3
—
1
—
2
1
1
—
2
2
—
1
2
2
2
4
1
1
Temp °C
24
25
24
24
24
24
23
23
24
23
24
23
23
24
24
24
24
24
23
23
24
Feels °C
24
24
22
23
21
21
19
20
20
19
21
19
20
21
21
21
21
21
21
21
22
Swell 1
Height (m)
Direction
Period (s)
0.8
SSW
15
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
0.5
S
16
0.7
S
15
0.6
S
15
0.6
S
14
0.5
S
13
0.6
S
14
0.4
S
12
0.5
S
13
0.5
S
13
0.4
S
12
0.5
SE
9
Energy kJ
242
165
152
101
134
129
157
109
94
188
125
218
155
132
92
140
49
88
84
49
38
Swell 2
Height (m)
Direction
Period (s)
0.4
NNW
12
0.4
NNW
11
0.3
NNW
11
0.4
SSW
17
0.4
SSW
14
0.4
SE
13
0.4
SE
13
0.5
SE
12
0.5
S
18
0.5
S
13
0.4
SSW
13
0.4
SE
12
0.4
NW
13
0.4
NW
12
0.3
S
16
0.3
NW
11
0.4
S
15
0.2
NNW
11
0.3
S
17
0.3
SE
9
0.4
S
12
Energy kJ
55
41
23
93
61
44
42
69
154
90
57
35
44
37
46
19
68
11
49
13
47
Swell 3
Height (m)
Direction
Period (s)
0.4
SE
7
0.3
SSW
18
0.3
SSW
18
0.4
SE
9
0.4
SE
14
0.3
SE
8
0.2
SSW
12
0.4
S
18
0.4
SE
9
0.4
SE
12
0.4
SE
12
0.3
NNW
15
0.3
SE
12
0.3
SE
9
0.3
NW
12
0.1
SE
11
0.3
SE
9
0.1
S
15
0.2
SSE
9
0.3
S
16
0.4
S
16
Energy kJ
13
64
62
21
46
10
14
102
19
36
35
42
21
14
22
5
13
4
8
47
79
Wind waves
Height (m)
Direction
Period (s)
1.7
ENE
7
2
ENE
8
2.1
ENE
8
2.3
ENE
8
2.5
ENE
8
2.5
ENE
8
3
ENE
8
2.5
ENE
9
2.4
ENE
9
2.5
ENE
8
2.4
ENE
8
2.5
ENE
8
2.5
ENE
9
2.3
ENE
8
2.4
ENE
8
2.2
ENE
8
2.3
ENE
8
2.4
ENE
8
2.2
ENE
8
2.1
ENE
8
1.8
ENE
8
Energy kJ
268
472
520
671
893
932
1123
953
839
870
782
837
877
722
782
646
688
770
604
555
423
Nearest Offshore or Glassy
Acid Drops
HAW - Kaua'i
Infinities
HAW - Kaua'i
Waimea Rivermouth
HAW - Kaua'i
Majors Bay
HAW - Kaua'i
Davidson Point
HAW - Kaua'i
Pine Trees
HAW - Big Island
Infinities
HAW - Kaua'i
Infinities
HAW - Kaua'i
Infinities
HAW - Kaua'i
Infinities
HAW - Kaua'i
Infinities
HAW - Kaua'i
Majors Bay
HAW - Kaua'i
Davidson Point
HAW - Kaua'i
Waimea Rivermouth
HAW - Kaua'i
Majors Bay
HAW - Kaua'i
Acid Drops
HAW - Kaua'i
Davidson Point
HAW - Kaua'i
Lahaina Breakwall/Harbour
HAW - Maui
Acid Drops
HAW - Kaua'i
Davidson Point
HAW - Kaua'i
Infinities
HAW - Kaua'i
Rating
(10 max)
1
3
3
3
3
2
3
3
3
3
3
3
1
3
2
3
2
1
1
2
1
Distance (km)
16
31
33
46
38
427
31
31
31
31
31
46
38
33
46
16
38
300
16
38
31
Best forecast wave conditions in Kaua'i
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Infinities
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Majors Bay
Acid Drops
Majors Bay
Majors Bay
Majors Bay
Polihale
Rating
(10 max)
2
3
3
3
3
3
3
3
3
3
3
1
3
2
3
2
2
2
2
Best forecast wave conditions in United States
Gale Point
CAL - Humboldt
Steamer Lane-Middle Peak
CAL - Santa Cruz
Majors Bay
HAW - Kaua'i
Andrew Molera State Park
CAL - Monterey
Cojo
CAL - Santa Barbara
Gale Point
CAL - Humboldt
Moonstone Beach
CAL - Humboldt
Majors Bay
HAW - Kaua'i
Gale Point
CAL - Humboldt
Samoa Peninsula
CAL - Humboldt
Majors Bay
HAW - Kaua'i
Majors Bay
HAW - Kaua'i
Ranches
HAW - Oahu
Majors Bay
HAW - Kaua'i
Ranches
HAW - Oahu
Boners
CAL - San Luis Obispo
Westport-The Cove
Washington
Steamer Lane-Middle Peak
CAL - Santa Cruz
Mouse Rock
CAL - San Luis Obispo
Ranches
HAW - Oahu
Super Tubes
CAL - Ventura
Rating
(10 max)
5
3
3
4
3
3
4
3
3
3
3
3
3
3
2
3
3
1
3
2
2
Header Global
Achadas Da Cruz
Portugal
Anglet - Corsaires
France
Tahai
Chile
Cyclops
Australia
Tahai
Chile
Itaúna
Brazil
Trial Harbour
Australia
Trial Harbour
Australia
Currumbin Point
Australia
Dunedin - Bobs Beach
New Zealand
Papatowai
New Zealand
Dinner Plates
New Zealand
Etang-Sale
Reunion
Chameau
Mauritius
Otago Peninsula - Allans Beach
New Zealand
Baboon Point
South Africa
Ahijedero
Mexico
Balimbing
Indonesia
Bankvaults
Indonesia
Bankvaults
Indonesia
Aufaga Village
Samoa
Rating
(10 max)
4
4
5
4
5
5
7
6
5
5
8
5
5
5
4
4
4
4
4
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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