Ammonias surfForecast / HAW – Kaua'i / USA

information circle12 Day Weather and Surf, issued 7 pm Thursday 10 Jul 2025 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
26.0° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Ammonias this week:

The surf forecast for Ammonias over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Jul 11) at 5AM. The primary swell is predicted to be 1.8m and 7s period with a secondary swell of 0.6m and 9s. Another secondary swell of 0.5m and 12s is also forecast. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Ammonias in the next 12 days are 1.9m 7s and forecast to arrive on Thursday (Jul 17) 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+) 5AM (Fri 11th Jul)6ft (1.8m) 7s
Best Surf 5AM (Fri 11th Jul)6ft (1.8m) 7s
Most Powerful 2AM (Thu 17th Jul)6ft (1.9m) 7s

Table - best surf conditions forecast for Ammonias over the next 12 days.

Updates in  hr  min  s Forecast update imminent
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tue
22
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
1.8
ENE
1.6
ENE
1.7
ENE
1.6
ENE
1.4
ENE
1.4
ENE
1.3
ENE
1.4
ENE
1.4
ENE
1.6
ENE
1.4
ENE
1.4
ENE
1.2
ENE
1.1
ENE
1.2
ENE
1.6
ENE
1.7
ENE
1.9
ENE
1.9
ENE
1.8
ENE
1.7
ENE
1.7
ENE
1.6
ENE
1.6
ENE
1.6
ENE
1.7
ENE
1.6
ENE
1.6
ENE
1.6
ENE
1.6
ENE
1.5
ENE
1.3
ENE
1.3
ENE
1.5
ENE
1.6
ENE
1.7
ENE
Period(s) (?)777778888777777777777778887878887777
Wave
Graph
(?)Metric surfscale
Energy (?)552463474476382383348367421465413488333338377409473486496440414395364480501532465492445530468401355468474502
Wind
(km/h)
25
ENE
25
ENE
25
ENE
20
ENE
15
E
15
E
20
E
20
E
20
ENE
20
E
20
ENE
20
ENE
15
ENE
20
E
25
ENE
20
ENE
25
ENE
25
ENE
25
NE
25
ENE
25
ENE
20
NE
25
ENE
25
NE
20
ENE
20
ENE
25
NE
25
ENE
25
ENE
25
ENE
25
ENE
30
ENE
25
ENE
25
ENE
25
ENE
25
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on
crosscrosscross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
crosscross-
on
cross-
on
crosscrosscrosscrosscrosscrosscrosscross-
on
crosscrosscrosscrosscrosscrosscrosscross-
on
cross-
on
crosscross-
on
crosscross
High Tide
/ height (m)
3:25AM
0.20
4:52PM
0.69
4:11AM
0.21
5:25PM
0.68
5:06AM
0.23
5:57PM
0.65
6:11AM
0.25
6:28PM
0.59
7:29AM
0.29
6:58PM
0.52
8:57AM
0.35
7:26PM
0.44
10:23AM
0.43
7:50PM
0.35
11:35AM
0.52
12:33PM
0.61
1:24PM
0.67
11:43PM
0.18
2:10PM
0.72
1:05AM
0.18
2:53PM
0.74
Low Tide
/ height (m)
11:35PM
0.13
9:09AM
-0.05
12:03AM
0.12
9:49AM
-0.03
12:33AM
0.10
10:31AM
0.01
1:04AM
0.08
11:18AM
0.07
1:36AM
0.06
12:16PM
0.15
2:09AM
0.04
1:35PM
0.23
2:44AM
0.01
3:37PM
0.29
3:24AM
-0.01
4:10AM
-0.03
5:02AM
-0.04
9:45PM
0.17
5:56AM
-0.05
10:04PM
0.15
6:51AM
-0.07
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tue
22
Sunrise-6:01--6:01--6:01--6:01--6:01--6:03--6:03--6:03--6:03--6:03--6:05--6:05-
Sunset--7:23--7:23--7:23--7:22--7:22--7:22--7:22--7:22--7:22--7:22--7:22--7:21
clearrain showersclearrain showersrain showersthunderstorm thunderstorm rain showersrain showersthunderstorm clearclearrain showersthunderstorm thunderstorm clearpart cloudpart cloudpart cloudpart cloudpart cloudpart cloudpart cloudclearclearpart cloudclearthunderstorm thunderstorm clearthunderstorm thunderstorm clearpart cloudpart cloudpart cloud
Rain (mm)
-2-1116211--121------------21-31----
Temp. °C252526242626252626252626252626252626252627252626252727252626242626252526
Feels °C (?)242425242626262626252626262726252424252425242524252626252524222424232324

Short Range Forecast: Moderate rain (total 14mm), heaviest on Sat night. Warm (max 26°C on Fri afternoon, min 23°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Sun night. Warm (max 26°C on Mon morning, min 23°C on Sun night). Wind will be generally light.

Days 6-9 Weather Summary Mostly dry. Warm (max 27°C on Thu afternoon, min 24°C on Wed night). Wind will be generally light.

Long Range Forecast: Light rain (total 7mm), mostly falling on Sat night. Warm (max 26°C on Sun morning, min 24°C on Sat night). Mainly fresh winds.

  • 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 12 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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