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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
15
0
Poor
2.5m
@11s
20km/h
Mon
16
11
Poor
1.9m
@12s
6km/h
Tue
17
19
Poor
2.7m
@14s
5km/h
+7
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Today's Conditions

Swell
2.5m
WSW(256°)
Score: 2/25
Period
11s
Medium period swell
Score: 2/25
Wind
20km/h
WSW(240°)
Score: 1/25
Weather
25°C
0.2mm91%
Windswell Component
1.2mWSW@4s
Secondary Swell
1.0mNNW
Forecast Confidence
100%
Sources: open-meteo-marine, open-meteo-weather
Best Session
afternoon

Location & Conditions

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

Tide Times

1:00 am
High tide - 1.01m
8:10 am
Low tide - 0.55m
12:30 pm
High tide - 0.64m
6:00 pm
Low tide - 0.40m
Times shown in spot-local time.

Strike Score Breakdown

0
Poor
Components
Swell Direction3/25
Swell Size2/25
Swell Period2/25
Wind1/25
Raw Score8/100
Adjustments
🤢 Wind History-10
🌊💨 Windswell-3
⚠️ Weak Component-15
📉 Undersized Swell-11
🚫 Undersized Capmax 30
Adjusted Score0/100
Confidence
Multiplier×1.00
Final Score0
🤢 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