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Surf Forecasts:

Ammonias surfForecast / HAW – Kaua'i / USA

information circle12 Day Weather and Surf, issued 7 pm Tuesday 10 Feb 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
24.6° C
 (Which is slightly warmer than usual)

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 Tuesday (Feb 17) at 8AM. The primary swell is predicted to be 2.0m and 9s period with a secondary swell of 0.3m and 14s. Another secondary swell of 1.8m and 8s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Ammonias in the next 12 days are 3.5m 10s and forecast to arrive on Sunday (Feb 15) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 10s period and expected on Saturday (Feb 14) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Tue 17th Feb)6.5ft (2.0m) 9s
Best Surf 8AM (Tue 17th Feb)6.5ft (2.0m) 9s
Most Powerful11PM (Sun 15th Feb)11ft (3.5m) 10s

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

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

Short Range Forecast Moderate rain (total 18mm), heaviest on Fri afternoon. Warm (max 23°C on Wed morning, min 21°C on Wed night). Mainly fresh winds.

Days 3-6 Weather Summary Heavy rain (total 81mm), heaviest during Sun afternoon. Warm (max 22°C on Fri night, min 21°C on Sun afternoon). Mainly fresh winds.

Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tue
17
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
3
ENE
2.5
E
2.4
ENE
2.2
ENE
2.2
E
2.2
ENE
2.2
ENE
2.1
ENE
2.3
ENE
2.5
ENE
3.5
ENE
3
ENE
3
ENE
3.5
ENE
3.5
ENE
3.5
ENE
3
ENE
2.5
ENE
2.2
ENE
1.7
SSE
1.7
ENE
Period(s) (?)988888888899101010101010989
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1524106880066065959955648156186717671263174221752405238617611405816339484
Wind
(km/h)
35
ENE
25
ENE
25
ENE
25
ENE
30
E
30
E
25
E
30
E
25
E
30
E
30
E
30
E
30
E
35
E
35
E
35
E
30
E
25
ESE
20
E
10
ESE
10
ESE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on
High Tide
/ height (m)
12:43AM
0.51
11:10AM
0.13
1:27AM
0.55
12:39PM
0.15
2:04AM
0.58
1:23PM
0.17
2:37AM
0.60
2:00PM
0.20
3:06AM
0.61
2:37PM
0.23
3:33AM
0.61
3:15PM
0.27
3:59AM
0.60
3:56PM
0.30
Low Tide
/ height (m)
10:25AM
0.13
4:54PM
0.03
9:45AM
0.12
5:58PM
0.01
9:40AM
0.12
6:50PM
-0.02
9:46AM
0.11
7:33PM
-0.05
9:57AM
0.09
8:14PM
-0.06
10:14AM
0.07
8:53PM
-0.05
10:34AM
0.04
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tue
17
Sunrise-7:09--7:09--7:09--7:09--7:07--7:07--7:07-
Sunset--6:31--6:32--6:32--6:34--6:34--6:35--6:35
cloud
part cloud
light rain
rain showers
rain showers
rain showers
rain showers
rain showers
light rain
thunderstorm
rain showers
light rain
heavy rain
rain showers
mod rain
heavy rain
mod rain
light rain
mod rain
mod rain
heavy rain
Rain (mm)
--141242411641441021929815
Temp. °C222323222323222222222222222222212222222121
Feels °C (?)192020192021192020191919201919172020212422
  • 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Ammonias surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Ammonias at:
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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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