Avalanche surfForecast / HAW – Oahu / USA

information circle48hr Weather and Surf, issued 1 pm Saturday 21 Mar 2026 HST
Forecast update in hr  min  s Forecast update imminent
Avalanche surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Avalanche sea temperature is
24.5° C
(Which is normal for this time of year)

How big are the waves at Avalanche today?

The current surf forecast for Avalanche at 6PM is: 2.1m 11s primary swell from a North direction (forecast issued at 01:00pm March 21). An open ocean swell of 0.8m 18s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (HST) & DateWave HeightWave Period
Morning (21 Mar)5ft (1.6m)11s
Afternoon (21 Mar)6.5ft (2.0m)12s
Evening (21 Mar)6.5ft (2.0m)11s

Table - waves today at Avalanche. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent
Saturday
21
Sunday
22
Monday
23
Tuesday
24
11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM11AM2PM5PM8PM11PM2AM5AM8AM
Rating
(10 max)
2
2
1
2
2
2
2
2
3
2
3
1
2
2
2
1
0
0
0
1
1
1
1
1
Swell
Height Map
Wave Height (m) & direction (?)
1.7
N
2
N
2.1
N
2
N
1.8
NNE
1.2
NNE
1.2
N
1.1
N
1.1
N
1.2
N
0.8
WNW
1.1
N
1.1
N
1.1
N
1.2
N
0.8
N
0.8
N
1.2
NNE
1.3
NNE
1.4
NNE
1.5
NNE
1.5
NNE
1.4
NNE
1.4
NNE
Period(s) (?)11121211111112111111141010101010106778888
Wave
Graph
(?)Metric surfscale
Energy kJ (?)6951103116798880734838329228732926121423723327312111797137186298284243243
Wind
(km/h)
15
SW
15
WSW
15
WSW
10
SW
10
SSW
10
SW
10
WSW
5
W
5
WNW
5
NNW
5
N
10
NNE
15
NE
15
NE
15
NE
20
NE
25
NE
25
NE
25
NE
25
ENE
25
ENE
20
NE
20
NE
25
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on
cross-
on
cross-
on
crosscrosscross-
on
onglasscross-
on
glasscrosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
High Tide
/ height (m)
5:20PM
0.45
4:45AM
0.18
6:17PM
0.46
5:27AM
0.13
7:25PM
0.45
6:34AM
0.08
Low Tide
/ height (m)
9:09AM
-0.07
11:05PM
0.06
9:41AM
-0.06
12:37AM
0.08
10:19AM
-0.05
2:38AM
0.07
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Sunrise-------6:33-------6:33-------6:33
Sunset--6:43-------6:44-------6:44-----
thunderstorm
thunderstorm
clear
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
thunderstorm
cloud
thunderstorm
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
part cloud
Rain (mm)
21---11121--1-1---------
Temp. °C252525242423232324242423232222222323232222222221
Feels °C (?)272626272625252527262725242322222121202020212119
  • 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

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Avalanche 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.


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