Backdoor surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 7 am Saturday 04 Apr 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
23.9° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Backdoor this week:

The surf forecast for Backdoor over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Apr 07) at 2AM. The primary swell is predicted to be 0.5m and 18s period with a secondary swell of 0.5m and 12s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Backdoor in the next 16 days are 1.7m 13s and forecast to arrive on Wednesday (Apr 08) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Monday (Apr 06) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Tue 7th Apr)1.5ft (0.5m) 18s
Best Surf11AM (Wed 8th Apr)5.5ft (1.7m) 13s
Most Powerful11AM (Wed 8th Apr)5.5ft (1.7m) 13s

Table - best surf conditions forecast for Backdoor over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 2mm), mostly falling on Sun night. Warm (max 23°C on Sun afternoon, min 20°C on Sat night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 22mm), heaviest during Wed night. Warm (max 25°C on Thu afternoon, min 22°C on Tue morning). Wind will be generally light.

Saturday
04
Sunday
05
Monday
06
Tuesday
07
Wednesday
08
Thursday
09
Friday
10
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
2
2
2
3
4
4
2
2
2
0
0
0
1
Swell
Height Map
Wave Height (m) & direction (?)
1.1
NE
1
NE
0.6
NNW
0.7
NNW
0.7
NNW
0.5
NW
0.6
NW
0.6
NW
0.5
NW
0.8
NW
1
NW
1.5
NW
1.7
NW
1.7
NW
1.5
NW
1.3
NW
1.1
NW
0.9
NW
0.8
NW
0.8
NW
0.9
NW
Period(s) (?)7612111114131218161514131312121111101010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)121809810910392134120154310429862969925603420263191120113134
Wind
(km/h)
20
ENE
20
ENE
20
E
20
ENE
20
ENE
20
E
20
E
20
E
15
ESE
5
ENE
10
ENE
5
SSE
10
ESE
5
SSW
20
SSE
25
SSE
25
SSE
25
SSW
20
W
15
WSW
10
SW
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
offcross-
off
cross-
off
glasscross-
off
glasscross-
off
cross-
off
offcross-
off
cross-
on
cross-
on
cross
High Tide
/ height (m)
4:35PM
0.68
2:33AM
0.43
5:17PM
0.65
2:00AM
0.41
6:10PM
0.62
7:28PM
0.60
9:10PM
0.60
10:22PM
0.62
11:06PM
0.64
Low Tide
/ height (m)
9:06AM
0.09
11:05PM
0.38
9:25AM
0.10
12:23AM
0.41
9:45AM
0.11
10:08AM
0.13
10:35AM
0.16
11:09AM
0.19
1:23PM
0.24
Saturday
04
Sunday
05
Monday
06
Tuesday
07
Wednesday
08
Thursday
09
Friday
10
Sunrise6:22--6:20--6:20--6:18--6:18--6:18--6:16--
Sunset-6:47--6:47--6:47--6:49--6:49--6:49--6:50-
clear
clear
clear
clear
clear
rain showers
rain showers
part cloud
clear
clear
clear
part cloud
part cloud
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
rain showers
rain showers
clear
Rain (mm)
-----11------26211111-
Temp. °C222221222322232322242423242423242523242423
Feels °C (?)201919202120222121252524252624232322262424
  • 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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Quick surf report for Backdoor:

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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 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.


Information about the Backdoor Surf forecast

The above surf forecast table for Backdoor provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Backdoor can be found by selecting the local surf guide option on the grey menu. Our Backdoor 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 (Backdoor) 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 Backdoor 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.

Backdoor is 19 km (12 miles) from Wahiawa. If you plan a vacation in Oahu, look for hotels and other accommodation in Wahiawa. Wahiawa has rooms for a wide range of budgets as well as car hire and transport links.

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