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Surf Forecasts:

Backdoor surfForecast / HAW – Oahu / USA

information circle48hr Weather and Surf, issued 1 am Wednesday 11 Mar 2026 HST
Forecast update in hr  min  s Forecast update imminent
Backdoor surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Backdoor sea temperature is
24.5° C
 (Which is normal for this time of year)

How big are the waves at Backdoor today?

The current surf forecast for Backdoor at 9AM is: 0.8m 12s primary swell from a West-northwest direction (forecast issued at 01:00am March 11). An open ocean swell of 1.2m 8s is not directed at the surf break, a second open ocean swell of 1.1m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (HST) & DateWave HeightWave Period
Morning (11 Mar)2.5ft (0.8m)12s
Afternoon (11 Mar)3ft (0.9m)12s
Evening (11 Mar)3ft (0.9m)11s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Wednesday
11
Thursday
12
Friday
13
11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM
Rating
(10 max)
1
0
0
0
1
0
1
2
2
2
2
2
1
1
2
1
0
1
1
1
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.5
WNW
0.6
WNW
0.7
WNW
0.8
WNW
0.9
WNW
0.9
WNW
0.9
WNW
0.9
WNW
0.9
WNW
0.9
WNW
0.9
WNW
0.9
WNW
0.9
WNW
1.2
W
0.9
WNW
0.8
WNW
0.8
WNW
1
W
1
W
0.9
W
0.7
WNW
0.6
WNW
0.8
WSW
1.4
WSW
Period(s) (?)1313131312121211111111101010101010101010101089
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1011371491812102031961861731671611581552961461331331921941561007583268
Wind
(km/h)
20
SSE
20
S
20
S
20
S
20
S
25
SSW
25
SSW
15
SSW
15
SSW
15
SSW
15
S
10
S
15
SSW
20
SSW
15
SSE
15
SSE
15
S
10
SSW
20
S
25
S
30
S
40
SSW
40
SSW
40
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off
High Tide
/ height (m)
10:58PM
0.58
11:51PM
0.62
12:24AM
0.66
11:08AM
0.29
Low Tide
/ height (m)
12:36PM
0.20
3:13PM
0.20
8:57AM
0.28
4:44PM
0.18
Wednesday
11
Thursday
12
Friday
13
Sunrise---6:43-------6:43-------6:41----
Sunset------6:39-------6:39-------6:39-
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
cloud
cloud
thunderstorm
mod rain
thunderstorm
thunderstorm
mod rain
thunderstorm
Rain (mm)
112334431111131---491326912
Temp. °C232323232425252424232323262523232323222223222122
Feels °C (?)232222232424242525242424262423242324222121181618
  • 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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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 Backdoor 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 Backdoor at:
surf-forecast.com

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