Backdoor surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 1 am Tuesday 12 May 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
25.2° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Backdoor this week:

The most powerful waves expected at Backdoor in the next 16 days are 1.5m 14s and forecast to arrive on Thursday (May 14) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 8s period and expected on Friday (May 15) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Thu 14th May)5ft (1.5m) 14s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 25°C on Tue afternoon, min 23°C on Tue night). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 7mm), mostly falling on Fri night. Warm (max 25°C on Fri morning, min 23°C on Fri night). Mainly fresh winds.

Tuesday
12
Wednesday
13
Thursday
14
Friday
15
Saturday
16
Sunday
17
Monday
18
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
2
2
1
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
NNW
11
0.9
NNW
10
0.8
NNW
10
0.7
NNW
9
0.3
NW
18
0.7
NW
16
1.1
NW
15
1.4
NW
14
1.4
NW
13
1.1
NW
12
1
NW
12
0.8
NW
11
0.6
NW
11
0.6
NNW
11
0.6
NNW
10
0.6
NNW
10
0.4
NNW
10
0.4
NNW
9
0.3
NNW
9
0.5
NW
14
0.6
NNW
12
Wave Graph
Metric surfscale
Energy kJ
117
157
120
73
50
271
558
731
632
386
282
147
96
78
71
67
38
33
16
102
98
Wind (km/h)
30
E
30
E
30
E
30
ENE
30
ENE
30
ENE
25
ENE
25
ENE
25
ESE
25
E
30
E
20
E
25
E
25
E
20
ESE
15
E
25
E
30
E
30
E
30
ENE
25
ENE
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
12:38PM0.54m
11:12PM0.54m
1:14PM0.65m
11:43PM0.50m
1:54PM0.74m
00:13AM0.46m
2:36PM0.81m
00:41AM0.41m
3:20PM0.85m
1:06AM0.38m
4:08PM0.86m
1:19AM0.36m
4:58PM0.84m
Low Tide
5:57PM0.37m
6:04AM0.10m
7:11PM0.36m
6:27AM0.05m
8:18PM0.36m
6:55AM-0.00m
9:24PM0.36m
7:27AM-0.03m
10:33PM0.36m
8:03AM-0.05m
11:58PM0.35m
8:41AM-0.04m
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:54
5:54
5:52
5:52
5:52
5:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:01
7:01
7:02
7:02
7:04
7:04
7:05
1
6
Temp °C
24
25
23
24
24
23
24
25
24
25
25
24
24
25
24
25
25
24
24
25
24
21
22
20
22
21
21
22
24
23
24
23
23
23
24
24
26
26
23
23
23
23
Swell 1
Height (m)
Direction
Period (s)
0.7
NNW
11
0.9
NNW
10
0.8
NNW
10
0.7
NNW
9
0.5
NW
9
0.7
NW
16
1.1
NW
15
1.4
NW
14
1.4
NW
13
1.1
NW
12
1
NW
12
0.8
NW
11
0.6
NW
11
0.6
NNW
11
0.6
NNW
10
0.6
NNW
10
0.4
NNW
10
0.4
NNW
9
0.4
SW
14
0.5
NW
14
0.6
NNW
12
Energy kJ
117
157
120
73
40
271
558
731
632
386
282
147
96
78
71
67
38
33
50
102
98
Swell 2
Height (m)
Direction
Period (s)
0.5
NW
10
0.2
SSW
16
0.2
SSW
16
0.2
SSW
15
0.3
N
9
0.4
N
8
0.5
NW
11
0.4
N
8
0.3
N
8
0.3
N
8
0.4
SW
16
0.3
NNW
15
0.4
SW
15
0.4
SW
15
0.3
SSW
15
0.4
SW
15
0.4
SW
14
0.4
SW
14
0.3
NNW
9
0.4
SW
14
0.4
SW
14
Energy kJ
50
25
25
21
14
22
60
22
12
12
64
42
57
55
43
54
54
51
16
49
46
Swell 3
Height (m)
Direction
Period (s)
0.1
SW
16
0.1
S
16
0.2
N
12
0.1
N
10
0.3
NW
18
0.4
NW
9
0.4
N
8
0.2
SSW
14
0.4
SW
16
0.4
SW
16
0.3
NNE
8
0.2
SSW
16
0.3
NNW
13
0.1
S
10
0.2
SSW
13
0.1
SE
11
0.2
SSW
21
0.1
NW
14
0.4
SW
19
0.2
NNW
9
0.2
NNW
8
Energy kJ
10
5
11
2
50
27
22
18
69
64
12
25
35
2
16
5
45
8
96
7
7
Wind waves
Height (m)
Direction
Period (s)
1.7
ENE
6
1.8
ENE
6
1.9
E
7
1.8
E
7
1.8
ENE
7
1.9
ENE
7
1.7
ENE
8
1.6
ENE
8
1.9
E
8
1.9
E
8
2.1
E
8
1.9
ENE
8
1.8
ENE
8
1.8
ENE
8
1.8
ENE
8
1.6
ENE
8
1.6
ENE
8
1.9
E
8
1.7
E
8
1.7
ENE
8
1.6
ENE
8
Energy kJ
227
265
321
311
299
383
336
300
403
424
491
449
448
459
448
367
376
488
393
402
341
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
1
1
2
3
3
3
2
2
1
1
1
1
1
2
2
2
2
1
Distance (km)
24
24
24
24
28
24
2
2
2
2
11
2
2
2
2
2
17
24
24
24
5
Best forecast wave conditions in Oahu
Rating
(10 max)
2
1
1
1
1
2
3
3
3
3
2
1
1
2
1
1
2
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
2
1
2
1
2
4
3
3
3
3
2
2
1
2
3
1
4
7
5
4
4
Header Global
Rating
(10 max)
9
9
6
8
9
5
5
5
5
5
5
4
6
5
5
4
4
7
5
5
4
  • 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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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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