Surf Forecasts:
Backdoor surf forecast from 3 Aug 2026:
- Most powerful swell: Saturday 8 Aug, 8AM (local time) - 1ft (0.3m), 19s period, SW swell with 57 kJ wave energy.
Best Forecast Surf Conditions for Backdoor this week:
The most powerful waves expected at Backdoor in the next 16 days are 0.3m 19s and forecast to arrive on Saturday (Aug 08) at 8AM. 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 (Aug 02) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Sat 8th Aug) | 1ft (0.3m) 19s |
Table - best surf conditions forecast for Backdoor over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks.
To be straight up with you, the outlook for Backdoor is a bummer. We’ve got a solid 16 days of data here, and every single window is marked as poor surf conditions. The swell is tiny, barely scraping 2ft at best, and the direction is all over the place – mostly from the west and northwest, which isn’t Backdoor’s optimum. The period is short too, mostly under 15 seconds, so there’s no real grunt in the water. The wind is a constant cross-off from the east and east-northeast, which would normally be okay, but with no swell to work with, it’s just a waste of good wind.
The first real glimmer of any energy shows up around Thursday, August 8th, when the combined swell energy hits 103 (moderate), but it’s still only 1ft of swell. That’s not enough to break. Later, on Tuesday, August 13th afternoon, we see a bump to 2ft with a 16-second period and combined energy of 140 (moderate), but again, it’s poor surf. The biggest pulse comes Friday, August 14th, with 2ft swell, 15-second period, and energy hitting 173 (moderate). That’s the best we get, but it’s still tiny. The water temp is a warm 80°, which is about average for this time of year, no anomaly to speak of.
So, the brutal truth is there’s nothing to recommend. This is a blank run for Backdoor. It’s a reef break that’s exposed and fairly consistent, but with no swell, it’s flat. The crowds are often a problem here, but they won’t be this fortnight. You’d be better off checking the forecast closer to the time, because things can change, but right now, leave the board at home.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun afternoon, min 24°C on Sun night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Wed afternoon, min 24°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Sun 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | N 9 | N 8 | N 7 | N 7 | N 7 | W 13 | W 13 | W 12 | W 12 | W 12 | W 11 | NNW 8 | SW 14 | NNW 7 | NNW 7 | NNW 7 | NE 11 | SW 18 | SW 18 | W 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 13 | 12 | 10 | 4 | 4 | 13 | 14 | 27 | 11 | 11 | 10 | 13 | 32 | 18 | 10 | 9 | 42 | 53 | 50 | 9 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | 4:43PM0.64m | 5:51AM0.47m | 4:53PM0.58m | 7:21AM0.49m | 4:51PM0.53m | 9:30AM0.55m | 11:12AM0.63m | 12:08PM0.71m | 12:52PM0.77m | |||||||||||
Low Tide | 11:39PM0.20m | 10:44AM0.34m | 00:07AM0.17m | 11:41AM0.43m | 00:44AM0.15m | 1:34AM0.12m | 2:44AM0.10m | 4:02AM0.07m | ||||||||||||
 |  |  | | | |  | | | | | | |  | | |  | | | | |
 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 24 | 23 | 25 | 25 | 25 | 26 | 27 | 26 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | E 14 | E 13 | E 13 | E 12 | E 12 | ENE 11 | ENE 11 | W 12 | ENE 10 | SSW 15 | ENE 9 | NNW 8 | NNW 8 | ENE 8 | ENE 7 | ENE 8 | NE 11 | NE 10 | NE 9 | SW 18 |
| kJ | 186 | 121 | 81 | 76 | 101 | 524 | 436 | 27 | 301 | 22 | 113 | 13 | 19 | 37 | 31 | 43 | 42 | 50 | 42 | 78 |
Swell 2 Height (m) Direction Period (s) | SW 13 | N 8 | N 7 | SSW 12 | SSW 12 | W 13 | W 13 | SSW 15 | NNE 9 | NNE 8 | SW 15 | SSW 14 | SW 14 | NNW 7 | NNW 7 | SW 13 | SW 13 | SW 14 | SW 13 | SSW 13 |
| kJ | 44 | 12 | 10 | 15 | 14 | 13 | 14 | 22 | 8 | 7 | 54 | 20 | 32 | 18 | 10 | 46 | 45 | 46 | 44 | 34 |
Swell 3 Height (m) Direction Period (s) | N 9 | SSW 13 | SSW 13 | N 7 | N 7 | SW 12 | SSW 16 | NNE 9 | W 12 | W 12 | W 11 | W 11 | W 11 | SW 14 | SSW 14 | NNW 7 | NNW 7 | SW 18 | SW 18 | W 11 |
| kJ | 13 | 16 | 17 | 4 | 4 | 5 | 26 | 8 | 11 | 11 | 10 | 10 | 10 | 52 | 18 | 9 | 9 | 53 | 50 | 9 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | ENE 10 | — | ENE 9 | ENE 5 | ENE 8 | ENE 8 | ENE 5 | ENE 5 | E 5 | E 6 | E 7 | E 7 | E 7 |
| kJ | 665 | 560 | 344 | 313 | 329 | — | — | 419 | — | 237 | 62 | 211 | 137 | 28 | 35 | 53 | 235 | 208 | 225 | 400 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 24 | 24 | 24 | 26 | 24 | 24 | 6 | 0 | 0 | 0 | 9 | 24 | 2 | 24 | 24 | 24 | 2 | 2 | 5 | 24 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Backdoor surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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