Backdoor surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 1 am Saturday 09 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 slightly warmer than usual)

Best Forecast Surf Conditions for Backdoor this week:

The most powerful waves expected at Backdoor in the next 16 days are 1.4m 14s and forecast to arrive on Friday (May 15) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 7s period and expected on Wednesday (May 13) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Fri 15th May)4.5ft (1.4m) 14s

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 3mm), mostly falling on Sat morning. Warm (max 25°C on Sun afternoon, min 23°C on Sat morning). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Tue afternoon. Warm (max 24°C on Tue morning, min 23°C on Tue morning). Mainly fresh winds.

Saturday
9
Sunday
10
Monday
11
Tuesday
12
Wednesday
13
Thursday
14
Friday
15
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
1
1
1
0
0
0
0
0
0
0
0
0
0
0
1
2
2
2
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
NW
11
1.5
NNE
6
0.9
NNW
11
1.3
NNW
12
1.3
NNW
11
1.2
NNW
12
1.2
NNW
11
1.2
NNW
11
1.6
NE
6
0.7
NNW
11
0.9
NNW
10
0.8
NNW
10
0.6
NW
9
0.5
NW
9
0.6
NW
16
1
NW
15
1.2
NW
14
1.4
NW
14
1.2
NW
13
1.1
NW
12
0.9
NW
12
Wave Graph
Metric surfscale
Energy kJ
198
176
207
421
394
371
317
313
188
117
154
120
67
40
211
424
564
671
471
330
192
Wind (km/h)
30
NE
25
NE
20
ENE
20
E
25
ENE
25
ENE
25
ENE
30
ENE
25
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
E
30
ENE
25
ENE
20
ENE
15
ENE
15
NE
15
NE
cross
cross
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
cross
High Tide
9:40AM0.26m
9:27PM0.62m
11:25AM0.34m
10:05PM0.61m
12:02PM0.44m
10:40PM0.58m
12:38PM0.54m
11:12PM0.54m
1:14PM0.65m
11:43PM0.50m
1:54PM0.74m
00:13AM0.46m
2:36PM0.81m
00:41AM0.41m
Low Tide
11:43AM0.26m
5:40AM0.24m
2:30PM0.32m
5:36AM0.20m
4:30PM0.36m
5:46AM0.15m
5:57PM0.37m
6:04AM0.10m
7:11PM0.36m
6:27AM0.05m
8:18PM0.36m
6:55AM-0.00m
9:24PM0.36m
rain showers
part cloud
part cloud
clear
clear
clear
clear
clear
rain showers
clear
rain showers
rain showers
rain showers
rain showers
part cloud
clear
clear
part cloud
part cloud
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:54
5:54
5:54
5:54
5:54
5:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
7:01
7:01
7:01
7:02
7:02
2
1
1
4
2
2
1
1
Temp °C
23
24
24
24
25
23
24
24
23
24
24
23
23
24
23
24
24
24
24
24
23
22
23
24
23
24
21
22
22
21
21
21
20
20
22
20
22
22
22
24
24
24
Swell 1
Height (m)
Direction
Period (s)
0.9
NW
11
0.8
NW
11
1.3
NNE
6
1.3
NNW
12
1.3
NNW
11
1.2
NNW
12
1.2
NNW
11
1.2
NNW
11
0.8
NW
11
0.7
NNW
11
0.9
NNW
10
0.8
NNW
10
0.6
NW
9
0.5
NW
9
0.6
NW
16
1
NW
15
1.2
NW
14
1.4
NW
14
1.6
NE
7
1.5
NE
7
1.4
NNE
7
Energy kJ
198
140
122
421
394
371
317
313
137
117
154
120
67
40
211
424
564
671
268
242
191
Swell 2
Height (m)
Direction
Period (s)
0.4
ESE
8
0.4
ESE
8
0.9
NNW
11
0.4
ESE
8
0.4
NW
13
0.1
SW
13
0.1
S
18
0.1
SW
17
0.3
NNW
13
0.6
NW
10
0.2
SSW
16
0.2
SSW
16
0.2
SSW
15
0.2
NNW
18
0.4
NW
9
0.5
N
9
0.5
N
9
0.6
ESE
8
1.2
NW
13
1.1
NW
12
1
E
8
Energy kJ
20
21
207
21
63
7
6
12
33
64
25
25
21
31
21
37
39
48
471
330
114
Swell 3
Height (m)
Direction
Period (s)
0.2
SSW
15
0.3
NW
14
0.4
NW
13
0.2
SSW
13
0.1
S
11
0.1
S
11
0.1
S
10
0.1
S
12
0.1
SW
18
0.1
SW
16
0.1
S
16
0.2
N
12
0.2
N
12
0.2
SSW
14
0.2
SSW
14
0.4
NW
11
0.2
SSW
14
0.3
N
8
0.4
SW
16
0.4
SW
16
0.9
NW
12
Energy kJ
21
32
61
17
3
2
2
3
12
10
5
12
11
21
21
31
18
12
64
64
192
Wind waves
Height (m)
Direction
Period (s)
1.5
NE
6
1.5
NNE
6
0.6
E
6
1
ENE
6
1
E
6
1.2
ENE
5
1.3
E
6
1.1
E
6
1.6
NE
6
1.6
ENE
6
1.6
ENE
6
1.8
E
6
1.8
ENE
7
2.1
ENE
7
2.2
NE
8
2.1
ENE
7
1.9
NE
8
1.7
NE
7
Energy kJ
161
176
22
69
62
84
110
94
188
203
205
276
286
396
516
455
416
311
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
2
2
3
2
1
2
2
1
1
1
1
2
2
3
3
3
3
2
Distance (km)
28
33
2
2
28
24
2
165
24
24
26
24
24
24
24
24
26
2
9
2
2
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
2
2
3
2
2
2
1
1
1
2
2
3
3
3
3
3
2
Best forecast wave conditions in United States
Rating
(10 max)
3
2
4
2
2
3
3
2
3
2
1
3
3
2
3
3
3
3
3
3
3
Header Global
Rating
(10 max)
5
4
4
9
5
5
5
6
9
9
9
9
6
5
5
5
6
5
5
6
5
  • 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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