Surf Forecasts:
ADs/Doubles surf forecast from 20 Aug 2026:
- Best quality surf: Friday 21 Aug, 5AM (local time) - 3.5ft (1.0m), 7s period, NE swell with glassy winds.
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 4ft (1.2m), 17s period, S swell with 851 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 5AM (local time) - 3.5ft (1.0m), 7s period with NE swell.
Best Forecast Surf Conditions for ADs/Doubles this week:
The surf forecast for ADs/Doubles over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 5AM. The primary swell is predicted to be 1.0m and 7s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at ADs/Doubles in the next 16 days are 1.2m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Friday (Aug 21) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 21st Aug) | 3.5ft (1.0m) 7s |
| Best Surf | 5AM (Fri 21st Aug) | 3.5ft (1.0m) 7s |
| Most Powerful | 11AM (Thu 27th Aug) | 4ft (1.2m) 17s |
Table - best surf conditions forecast for ADs/Doubles over the next 16 days.
The Lowdown
Alright, let’s break it down, Rusty style.
First few days? Forget it. Starting Thursday the 20th, we’ve got a tiny 2-foot SSW swell with a super long 18-second period, but the wind is a messy cross-breeze, making it all chop and no shape. Not worth the paddle.
Friday the 21st and Saturday the 22nd see a little bump from the ENE, but it’s short-period junk – around 7 seconds – and the wind is fresh to strong cross-shore, so it’s lumpy and ugly. Sunday the 23rd through Tuesday the 25th, the swell builds to 5–6 feet, but still that short period and strong cross-winds make it a total washing machine. The combined energy is moderate to strong, but it’s all wind-driven chop.
Honestly, from the 20th all the way up to the 2nd of September, it’s just poor or marginal. The one bright spot? Wednesday afternoon, the 2nd of September. The wind goes clean, cross-offshore from the NNE, and you’ve got a solid 7-foot NE swell with a 9-second period. Energy is moderate (853). That’s your best window. It’s not for beginners – over 6 feet is expert territory – and the shorter period might make it a bit walled up, but if you’re skilled, that afternoon could be really clean.
The water temp is about 80°F, right on average for the time of year, nothing weird there.
Crowds? Given it’s often busy here, that clean afternoon will draw a crowd.
Anything else? The tail end of the period, the 3rd and 4th of September, shows some swell but with onshore wind again, so it’s not promising.
So, one real standout: Wednesday afternoon, the 2nd of September. Everything else is a write-off thanks to constant cross-winds. That’s the call.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 25°C on Thu morning). Winds increasing (calm on Thu night, strong winds from the ENE by Sat night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Mon afternoon, min 25°C on Sun morning). Mainly strong winds. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
AM | 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) | SSW 18 | SSW 17 | NE 7 | ENE 7 | NE 7 | SSW 16 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | SSW 14 | SSW 13 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | SSW 14 | S 19 | S 18 |
Wave Graph  | |||||||||||||||||||||
 kJ | 207 | 202 | 119 | 67 | 106 | 322 | 137 | 225 | 286 | 255 | 371 | 277 | 188 | 156 | 212 | 364 | 319 | 245 | 215 | 450 | 311 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross |
High Tide | 10:20AM0.55m | 8:45PM0.20m | 11:21AM0.57m | 10:59PM0.20m | 12:10PM0.60m | 00:02AM0.21m | 12:51PM0.62m | 00:45AM0.24m | 1:26PM0.65m | 1:20AM0.27m | 1:56PM0.66m | 1:55AM0.30m | 2:25PM0.67m | 2:30AM0.34m | |||||||
Low Tide | 7:38PM0.20m | 3:06AM0.11m | 7:49PM0.17m | 4:20AM0.10m | 8:09PM0.14m | 5:23AM0.08m | 8:29PM0.12m | 6:13AM0.06m | 8:49PM0.11m | 6:56AM0.04m | 9:09PM0.10m | 7:36AM0.04m | 9:29PM0.09m | ||||||||
 | |  | | | | | | | | |  |  | | | | | |  | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 26 | 26 | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 29 | 29 | 29 | 29 | 30 | 29 | 26 | 22 | 22 | 22 | 22 | 22 | 23 | 24 | 23 | 23 | 25 | 23 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | NE 7 | ENE 7 | NE 7 | ENE 7 | NE 7 | SSW 16 | SW 16 | SW 16 | SSW 16 | ESE 9 | SSW 15 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 19 | S 18 |
| kJ | 67 | 160 | 119 | 67 | 106 | 322 | 261 | 255 | 215 | 77 | 191 | 100 | 166 | 156 | 129 | 85 | 142 | 121 | 215 | 450 | 311 |
Swell 2 Height (m) Direction Period (s) | E 8 | SSW 17 | SW 16 | SW 17 | SW 16 | W 10 | S 13 | SSE 12 | S 14 | SSW 15 | SSE 13 | S 13 | SSE 12 | E 8 | E 8 | SSW 16 | SSW 12 | SSW 12 | SSW 18 | SSW 13 | SSW 13 |
| kJ | 71 | 202 | 278 | 295 | 264 | 31 | 84 | 50 | 104 | 144 | 60 | 86 | 50 | 51 | 51 | 146 | 56 | 56 | 107 | 135 | 135 |
Swell 3 Height (m) Direction Period (s) | SSW 18 | SSE 12 | W 9 | NNE 7 | W 10 | S 13 | ESE 8 | WNW 10 | WNW 12 | S 13 | NW 12 | SSW 15 | NW 12 | SSE 12 | SSE 12 | SSE 12 | SSE 7 | SSW 18 | S 21 | WNW 11 | SSW 16 |
| kJ | 207 | 28 | 28 | 41 | 32 | 54 | 22 | 35 | 28 | 90 | 36 | 71 | 23 | 48 | 46 | 28 | 9 | 108 | 79 | 11 | 51 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | ENE 6 |
| kJ | — | — | — | — | — | 117 | 137 | 225 | 286 | 255 | 371 | 277 | 188 | 147 | 212 | 364 | 319 | 245 | 201 | 192 | 170 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 7 | 7 | 7 | 7 | 7 | 7 | 49 | 58 | 56 | 62 | 64 | 49 | 50 | 56 | 49 | 50 | 50 | 49 | 49 | 49 | 22 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the ADs/Doubles Surf forecast
The above surf forecast table for ADs/Doubles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at ADs/Doubles can be found by selecting the local surf guide option on the grey menu. Our ADs/Doubles 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 (ADs/Doubles) 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 ADs/Doubles 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.
ADs/Doubles is 14 km (9 miles) from the city of Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.
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