Backdoor surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 1 am Sunday 31 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
25.0° C
(Which is slightly cooler than normal)

Backdoor surf forecast from 31 May 2026:

  • Most powerful swell: Thursday 4 Jun, 8PM (local time) - 3.5ft (1.1m), 12s period, N swell with 347 kJ wave energy.

Best Forecast Surf Conditions for Backdoor this week:

The most powerful waves expected at Backdoor in the next 16 days are 1.1m 12s and forecast to arrive on Thursday (Jun 04) 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 2.2m 8s period and expected on Saturday (Jun 06) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Thu 4th Jun)3.5ft (1.1m) 12s

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

Days 4-6 Weather Summary

Mostly dry. Warm (max 24°C on Wed morning, min 23°C on Wed night). Mainly fresh winds.

Sunday
31
Monday
1
Tuesday
2
Wednesday
3
Thursday
4
Friday
5
Saturday
6
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
0
0
0
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)
0.6
NNW
9
0.5
N
8
0.6
N
10
0.6
NNW
10
0.5
NNW
9
0.5
NNW
9
0.6
NNW
12
0.9
NNW
11
0.9
NNW
10
0.7
NNW
9
0.6
NNW
9
0.7
NNW
11
0.9
NNW
11
1
N
12
1.1
N
12
0.9
N
12
0.8
N
11
0.7
N
11
0.5
N
10
0.4
N
10
0.3
N
10
Wave Graph
Metric surfscale
Energy kJ
65
33
74
75
49
46
115
202
143
88
65
128
205
284
339
224
160
112
48
30
16
Wind (km/h)
15
ENE
20
ENE
15
ENE
20
E
20
ENE
25
ENE
25
ENE
30
ENE
25
E
30
E
30
E
30
E
35
E
30
ENE
30
E
30
ENE
30
ENE
30
ENE
30
ENE
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
3:41PM0.76m
00:52AM0.35m
4:17PM0.75m
4:54PM0.74m
5:32PM0.72m
6:08PM0.70m
6:42PM0.68m
5:01AM0.29m
7:15PM0.65m
Low Tide
11:33PM0.35m
8:07AM0.04m
8:37AM0.05m
9:08AM0.07m
9:38AM0.10m
10:08AM0.15m
4:01AM0.29m
10:40AM0.22m
3:39AM0.26m
clear
clear
clear
clear
clear
part cloud
rain showers
rain showers
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:48
5:48
5:48
5:48
5:48
5:48
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:09
7:10
7:10
7:10
7:12
7:12
7:13
1
1
Temp °C
24
25
24
24
24
24
24
24
24
24
24
23
24
24
23
24
24
23
24
24
23
24
25
25
24
23
24
23
23
23
23
22
21
21
21
20
22
21
20
21
21
20
Swell 1
Height (m)
Direction
Period (s)
0.6
NNW
9
0.5
N
8
0.6
N
10
0.6
NNW
10
0.5
NNW
9
0.5
NNW
9
0.6
NNW
12
0.9
NNW
11
0.9
NNW
10
0.7
NNW
9
0.6
NNW
9
0.7
NNW
11
0.9
NNW
11
1
N
12
1.1
N
12
0.9
N
12
0.8
N
11
0.7
N
11
0.5
N
10
0.4
N
10
0.3
N
10
Energy kJ
65
33
74
75
49
46
115
202
143
88
65
128
205
284
339
224
160
112
48
30
16
Swell 2
Height (m)
Direction
Period (s)
0.4
NNE
8
0.4
NNW
9
0.4
N
8
0.3
NNE
7
0.3
SSW
18
0.3
SSW
16
0.4
SSW
16
0.4
SSW
16
0.4
SSW
18
0.5
S
17
0.5
S
16
0.4
SSW
16
0.4
SSW
15
0.4
SSW
14
0.3
SSW
14
0.3
SSW
14
0.2
SSW
14
0.2
SSW
13
0.2
SSW
13
0.1
NW
9
0.2
SSW
13
Energy kJ
21
28
18
10
61
53
86
84
103
140
129
82
74
70
40
40
19
17
17
3
16
Swell 3
Height (m)
Direction
Period (s)
0.3
SSW
15
0.3
NNW
11
0.3
SSW
14
0.3
SSW
14
0.3
NNE
7
0.2
NNW
13
0.4
NNW
9
0.3
SSW
19
0.3
SSW
15
0.1
W
12
0.1
W
12
0.1
W
11
0.3
NW
10
0.3
NW
10
0.3
NW
10
0.1
NW
10
0.2
S
13
0.1
NW
9
Energy kJ
45
24
41
40
9
16
26
72
42
3
3
3
14
15
14
4
13
3
Wind waves
Height (m)
Direction
Period (s)
1.1
ENE
7
1.1
ENE
7
1.1
ENE
8
1.2
E
8
1.1
E
7
1.2
ENE
7
1.4
ENE
6
1.5
E
6
1.8
E
6
1.8
E
7
1.8
E
7
1.8
E
7
2
E
7
2
E
7
2
E
8
2.1
ENE
8
1.9
ENE
8
2
ENE
8
2.1
ENE
8
2.1
ENE
8
1.9
ENE
8
Energy kJ
140
140
147
163
134
131
155
171
255
303
297
297
382
427
459
533
460
521
547
547
427
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
4
1
1
1
1
3
3
3
2
2
2
2
1
1
1
1
Distance (km)
2
2
2
2
2
28
2
26
2
24
24
24
24
26
26
24
24
24
26
167
24
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
3
1
1
4
1
1
1
1
3
3
3
2
2
2
2
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
2
2
4
1
1
4
1
1
4
1
3
4
4
3
5
2
2
4
1
3
4
Header Global
Rating
(10 max)
6
5
4
5
5
5
4
5
4
5
5
5
6
5
5
9
9
8
9
9
8
  • 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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