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Surf Forecasts:

Backdoor surfForecast / HAW – Oahu / USA

information circle48hr Weather and Surf, issued 1 am Friday 21 Nov 2025 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
25.9° C
 (Which is normal for this time of year)

How big are the waves at Backdoor today?

The current surf forecast for Backdoor at 4AM is: 1.3m 13s primary swell from a Northwest direction and 0.7m 8s secondary swell from a North-northeast direction (forecast issued at 01:00am November 21). An open ocean swell of 2.4m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (HST) & DateWave HeightWave Period
Morning (21 Nov)4ft (1.2m)13s
Afternoon (21 Nov)3ft (0.9m)17s
Evening (21 Nov)3.5ft (1.1m)16s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Friday
21
Saturday
22
Sunday
23
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
1
1
2
1
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
2
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.4
NW
1.3
NW
1.3
NW
1.2
NW
1.2
NW
0.9
NW
0.9
NW
1.1
NW
1.1
NW
1
NW
1.1
NW
1.9
NW
1.8
NW
2.1
NW
2.1
NW
2.1
NW
2
NW
2
NW
1.8
NW
1.8
NW
1.7
NW
1.7
NW
1.6
NW
1.6
NW
Period(s) (?)131313131317171615181818171616161515141414141313
Wave
Graph
(?)Metric surfscale
Energy kJ (?)70156055250149448746555358864287222161796232622692185173816471402138211471052846834
Wind
(km/h)
30
E
35
E
30
E
25
E
25
ESE
20
ESE
20
E
25
E
25
E
20
E
25
E
20
E
20
E
20
E
20
ENE
20
E
25
E
20
E
20
E
15
E
20
E
15
E
20
E
20
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
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		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)
3:42AM
0.76
1:00PM
0.36
4:20AM
0.75
5:00AM
0.73
Low Tide
/ height (m)
11:20AM
0.35
8:10PM
0.04
8:38PM
0.05
Friday
21
Saturday
22
Sunday
23
Sunrise---6:47-------6:47-------6:48----
Sunset------5:47-------5:47-------5:47-
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
rain showers
part cloud
clear
clear
clear
clear
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
231372------------------
Temp. °C242424242324252424242424252525242424242425262524
Feels °C (?)232222242224252323232323252425242324242425262524
  • 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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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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