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Level 10/10

Backdoor Outer Reef

North Shore, Oahu, USA (HI)
😮‍💨Hold-downs🪸Sharp reef⚠️Shallow

The Backdoor Outer Reef encompasses Pipeline's 2nd and 3rd reef, breaking 80 yards outside the main zone at 4x+ overhead. Foamy lumps reform into Pipe on the inside, creating one of the most consequential waves on the North Shore.

3-Day Forecast
Today
16
4
Poor
1.8m
@12s
8km/h
Tue
17
23
Poor
2.8m
@14s
4km/h
Wed
18
25
Poor
2.8m
@14s
5km/h
+7
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Today's Conditions

Swell
1.8m
W(270°)
Score: 1/25
Period
12s
Medium period swell
Score: 4/25
Wind
8km/h
SW(229°)
Score: 14/25
Weather
26°C
0.0mm93%
Secondary Swell
0.9mNW
Forecast Confidence
100%
Sources: open-meteo-marine, open-meteo-weather
Best Session
morning

Location & Conditions

Loading map...
0°45°90°135°180°225°270°315°NESW
Swell
Wind
View in OpenStreetMap
Showing forecast for today

Tide Times

1:18 am
High tide - 0.93m
8:00 am
Low tide - 0.45m
1:06 pm
High tide - 0.66m
6:45 pm
Low tide - 0.37m
Times shown in spot-local time.

Strike Score Breakdown

4
Poor
Components
Swell Direction7/25
Swell Size1/25
Swell Period4/25
Wind14/25
Raw Score26/100
Adjustments
🤢 Wind History-7
⚠️ Weak Component-5
📉 Undersized Swell-10
🚫 Undersized Capmax 15
Adjusted Score4/100
Confidence
Multiplier×1.00
Final Score4
🤢 Morning Sickness👥 Spring Break

Spot Details

Swell Requirements

Optimal direction
NW (307°)
Direction range
295° - 320°
Size range
4.6m - 7.6m
Ideal size
6.3m
Height multiplier
1.08×
Ideal period
18s+

Wind Requirements

Optimal direction
ESE (120°)
Offshore range
90° - 160°
Best window
morning

Tide Requirements

Optimal tide
all

Water temp

25°C

Wetsuit

Boardshorts / Rashguard

Bottom

Reef

Max wave face

10m+

Board

Gun / Step-up

Consistency

2/10

Difficulty

10/10

Crowd level

3/10

👥 Spring Break (Mar 14Mar 22) — expect extra crowds

Access: Paddle from Ehukai Beach Park. Long paddle out.

Best Season

Peak: Dec, Jan, Feb

Secondary: Nov

Dec-Feb. Pipeline's 2nd and 3rd reef. Breaks 80yds outside main zone at 4x+ overhead.

Getting There

Airport
HNL
Drive time
55 min
Data quality
verified

Strike Log

Community Discussion