Ammonias surfForecast / HAW – Kaua'i / USA

information circle12 Day Weather and Surf, issued 1 am Thursday 26 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
24.4° 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 Saturday (Feb 28) at 5AM. The primary swell is predicted to be 0.7m and 8s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Ammonias in the next 12 days are 2.0m 7s and forecast to arrive on Thursday (Mar 05) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 12s period and expected on Thursday (Feb 26) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sat 28th Feb)2.5ft (0.7m) 8s
Best Surf 5AM (Sat 28th Feb)2.5ft (0.7m) 8s
Most Powerful 8AM (Thu 5th Mar)6.5ft (2.0m) 7s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 23°C on Sat morning, min 20°C on Thu morning). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 30mm), heaviest during Tue morning. Warm (max 23°C on Mon afternoon, min 20°C on Sun afternoon). Wind will be generally light.

Thursday
26
Friday
27
Saturday
28
Sunday
01
Monday
02
Tuesday
03
Wednesday
04
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
1.2
E
1.1
E
0.9
ENE
0.4
SW
0.6
SSE
0.7
SSE
0.5
SSE
0.5
SSE
0.6
SSE
0.6
SSE
0.6
SE
0.7
SE
0.7
SE
1.2
ENE
1.3
ENE
1.4
ENE
1.3
ENE
1.7
ENE
1.6
ENE
1.6
ENE
1.7
E
Period(s) (?)66616888889999106667777
Wave
Graph
(?)Metric surfscale
Energy kJ (?)12397566350553535485062797925695124119268206214262
Wind
(km/h)
15
E
15
E
10
ESE
15
SSE
10
SSE
5
E
10
SE
10
SE
5
SSW
10
N
5
NE
10
ENE
20
ENE
25
ENE
20
ENE
15
E
15
ENE
20
ENE
25
E
25
ENE
30
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
cross-
on
cross-
on
ononcross-
on
ononglasscross-
off
crosscrosscross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
High Tide
/ height (m)
12:11PM
0.13
1:29AM
0.62
1:14PM
0.17
2:12AM
0.63
2:02PM
0.22
2:48AM
0.62
2:44PM
0.27
3:20AM
0.59
3:26PM
0.32
3:49AM
0.55
4:06PM
0.37
4:14AM
0.49
4:46PM
0.40
4:37AM
0.43
Low Tide
/ height (m)
8:54AM
0.09
5:25PM
-0.03
9:02AM
0.08
6:33PM
-0.05
9:18AM
0.06
7:28PM
-0.05
9:36AM
0.04
8:17PM
-0.05
9:54AM
0.02
9:02PM
-0.03
10:14AM
0.01
9:45PM
0.01
10:33AM
-0.01
10:30PM
0.05
Thursday
26
Friday
27
Saturday
28
Sunday
01
Monday
02
Tuesday
03
Wednesday
04
Sunrise7:00--7:00--6:58--6:58--6:56--6:56--6:56--
Sunset-6:38--6:39--6:39--6:40--6:40--6:42--6:42-
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
part cloud
cloud
cloud
light rain
cloud
cloud
thunderstorm
thunderstorm
mod rain
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
Rain (mm)
----------4--19745234
Temp. °C212221222222232322222121222322222322232322
Feels °C (?)192020222123242424242322212221222421212120
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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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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