Backdoor Surf Break

Lat Long: 21.67° N 158.05° W

Backdoor Surf Forecast and Surf Report

Issued: 7 am 12 Jul 2026 (local time)

Forecast update in  hr  min

Today's Backdoor sea temperature is
26.0° C
0.0° 

Backdoor surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Backdoor surf forecast from 12 Jul 2026:

  • Most powerful swell: Tuesday 14 Jul, 11AM (local time) - 5ft (1.6m), 8s period, NE swell with 276 kJ wave energy.

Best Forecast Surf Conditions for Backdoor this week:

The most powerful waves expected at Backdoor in the next 16 days are 1.6m 8s and forecast to arrive on Tuesday (Jul 14) at 11AM. 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 Sunday (Jul 12) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11AM (Tue 14th Jul)5ft (1.6m) 8s

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


Alright, Rusty here. Let’s have a look at what’s happening at Backdoor. It’s a reef break, exposed to swell, and the optimum direction is from the NW. The water temp is sitting at 79°, about average for this time of year, no surprises there.

Right now and for the next several days, it’s a tough stretch. Most of the period is filled with poor surf conditions and no standout waves, so we’re looking at a long gap of nothing really rideable. The first few days, from Sunday the 12th through Monday the 13th, we’ve got tiny 2 ft swell coming from the SW with a long 15-16 second period, but it’s crossed up with fresh 19 mph cross-off winds from the ENE. The combined wave energy is weak to moderate (154), but the size is just too small and bumpy to be worth paddling out. It’s pretty much a wash.

Then Tuesday the 14th sees a bit of a jump in size to 5 ft, and the wind eases to 12-16 mph from the ENE, still cross-off. The swell is from the NE, but period drops to 8 seconds—short period windswell. Energy jumps to 560 (moderate), but the quality is marginal, with rain showers likely if you’re out in the lineup. Water temp is about normal for the season. It’s a step up, but still not great.

Wednesday the 15th drops back to 2 ft from the west with a 15-second groundswell, so longer gaps between sets. Winds stay cross-off around 12 mph, and the energy sits at 224. Again, poor to marginal at best.

The rest of the week and into the following week is very quiet. Thursday 16th through to Monday the 21st has tiny swell, often less than 2 ft, and some days show zero waves at all (0 combined energy). Winds stay from the east-northeast or east at 12-19 mph, cross-off, so not a single window of clean, surfable conditions. From Sunday the 19th, the swell is practically non-existent.

We see a little kick on Friday the 24th of July, with 4-4 ft from the NE, period around 6-7 seconds, energy up to 227. But it’s still cross-off breeze from the ENE at 16 mph, and the forecast calls it poor surf. Not a stand-out.

Finally, on Monday the 27th of July, in the afternoon, there’s a 6 ft NE windswell with 8-second period and a combined energy of 523. Cross-off winds from the ENE at 12 mph. That’s close to a notable event, but the wind stays cross-off, so the faces will be bumpy. For an intermediate crew at Backdoor, that could be too messy for the size, especially with the rip likely.

Honestly, there’s no single great day in this outlook. Tuesday the 14th is the biggest in the near term, and Monday the 27th is the biggest late in the run, but both are let down by the wind direction and short, weakish periods. For a place like Backdoor, you really want a clean offshore, not this cross-off chop that’s on offer.

No stand-outs here. Sorry, folks. Sometimes the ocean just gives you a blank stare for two weeks. Fingers crossed the models change.

Rusty

Short Range Forecast

Light rain (total 5mm), mostly falling on Tue morning. Warm (max 25°C on Sun morning, min 23°C on Mon night). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Wed morning. Warm (max 26°C on Wed afternoon, min 24°C on Wed night). Wind will be generally light.

Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
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
1
2
2
0
1
1
1
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)
0.5
SW
16
0.5
SW
16
0.5
SW
16
0.5
SW
15
0.4
W
18
0.4
W
18
1.6
NE
8
1.5
NE
8
0.6
W
15
0.7
W
15
0.7
W
15
0.7
W
15
0.6
W
14
0.6
W
14
0.6
W
14
0.5
W
14
0.5
W
14
0.4
WNW
13
0.4
WNW
13
0.4
WNW
13
0.3
WNW
13
Wave Graph
Metric surfscale
Energy kJ
127
124
119
110
103
100
276
255
172
224
218
215
153
150
150
101
101
60
57
57
32
Wind (km/h)
30
ENE
30
ENE
30
ENE
30
ENE
25
ENE
20
ENE
20
ENE
25
ENE
20
E
20
E
20
E
20
E
25
E
25
E
25
E
25
ENE
25
E
20
E
20
E
25
E
25
E
Wind State
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
2:25PM0.87m
00:05AM0.33m
3:05PM0.88m
1:15AM0.34m
3:42PM0.87m
2:16AM0.36m
4:17PM0.84m
3:16AM0.37m
4:48PM0.79m
4:19AM0.39m
5:14PM0.72m
5:30AM0.40m
5:34PM0.65m
Low Tide
10:15PM0.32m
7:01AM-0.04m
10:33PM0.31m
7:48AM-0.04m
10:57PM0.30m
8:33AM-0.00m
11:24PM0.28m
9:15AM0.06m
11:51PM0.26m
9:56AM0.15m
00:19AM0.24m
10:35AM0.25m
00:47AM0.21m
part cloud
clear
part cloud
part cloud
part cloud
part cloud
rain showers
rain showers
clear
rain showers
rain showers
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
rain showers
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:56
5:58
5:58
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:17
7:17
7:17
7:17
7:16
7:16
7:16
 mm
3
2
1
1
1
Temp °C
25
25
24
25
25
24
24
25
24
25
26
25
25
26
25
26
26
25
26
26
25
Feels °C
23
23
22
22
24
22
23
24
24
25
26
26
24
25
25
26
26
26
26
25
26
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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