
Surf Forecasts:
Rockpiles surf forecast from 6 Aug 2026:
- Most powerful swell: Thursday 13 Aug, 2AM (local time) - 4.5ft (1.3m), 16s period, S swell with 890 kJ wave energy.
Best Forecast Surf Conditions for Rockpiles this week:
The most powerful waves expected at Rockpiles in the next 16 days are 1.3m 16s and forecast to arrive on Thursday (Aug 13) 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 1.4m 6s period and expected on Wednesday (Aug 12) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Thu 13th Aug) | 4.5ft (1.3m) 16s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Well, folks, Rusty here. Let’s have a look at what’s cookin’ for Rockpiles. Gotta be honest with you, the next 16 days are a bit of a mixed bag – a lot of waiting for the good stuff to line up, but when it does, there’s some serious grunt on the table.
Right now, we’re sittin’ in a bit of a flat spell. The water temp is sittin’ around 81°, which is about average for this time of year – nothing to write home about. The first few days up to the morning of the 8th of August are pretty much a no-go. We’ve got tiny little 1 ft swell from the SSW, but it’s gettin’ knocked around by a solid 16 mph cross-off wind from the ENE. The energy is weak (165) and the surf is just poor. Not worth paddling out for.
The morning of the 8th of August sees a jump in size, but it’s a messy one. The swell hits 5 ft from the ENE, but with a short, weak period of only 6 seconds and the same stiff cross-off breeze at 22 mph, it’s gonna be a choppy, lumpy mess. The energy is moderate (500), but the quality is poor. This setup actually looks more interesting for kite surfing than paddle surfing – the wind and chop will be a handful for a surfer. That continues into the 9th with 6 ft and a bit more period (7 seconds), but still only marginal surf at best.
Now, hold on to your board shorts, because from the 11th of August things start to change. The wind stays a persistent cross-off, but on the 12th of August we see a long-period groundswell start to fill in. By the morning of the 12th, we’ve got 3 ft from the S with a period of 18 seconds, and the energy is strong (859). This is proper groundswell – long, clean lines, though it’s still only marginal surf due to the wind. The 13th of August keeps that S swell around 4 ft, period 15-16 seconds, with energy holding strong (857). The offshore wind direction is still cross-off, but the swell direction from the S is not the optimum SSE that Rockpiles loves. Still, it’s a big step up in quality.
The real standout, the one to circle on your calendar, is the weekend of the 15th and 16th of August. This is where it gets serious. From the 15th of August, we’ve got a solid 10 ft to 12 ft swell from the ENE, with a period of 8-9 seconds. The energy is massive – over 1,900 (1968) on the afternoon of the 15th. That’s strong to very strong wave energy. Now, the catch is that this is a short-period swell, not a groundswell, and the wind is a stiff 25-28 mph cross-off. The surf will be big, powerful, and chunky. This is expert territory – over 8 ft, so it’s not for the faint of heart. The break is a reef, so it can handle a big swell, but the ENE direction is not the optimum SSE, so it might not be as perfect as it could be. The crowds are “sometimes” here, so it might get a bit busy if the word gets out.
The 17th of August still holds 8 ft from the ENE with moderate energy (1,191), and the wind drops to 19 mph. Still a cross-off, but the quality is improving to “marginal” with a score of 2. This is the best of the second week – still big, but a touch more manageable. After that, things slowly wind down through the 18th and 19th, with the swell dropping to 7 ft and then 6 ft, and the energy falls off. By the 20th of August, we’re back to small, weak SW swell of 2 ft-2 ft, and the poor surf returns.
So, the best bet for the experienced crew is the 15th and 16th of August for the sheer size and power, but be ready for a bumpy, wind-affected ride. The 17th of August offers a slightly cleaner window with still big waves. For the rest of us, it’s a long wait for anything clean and rideable. The first week is a write-off, and the second week is a gamble on the wind. It’s a tough forecast, but that’s the ocean for ya.
Stay safe out there.
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Thu morning, min 25°C on Thu morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Mon afternoon, min 25°C on Sun morning). Mainly fresh winds. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 14 | SSW 14 | ENE 8 | SW 21 | SW 20 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | SSW 14 | SSW 14 | S 20 | S 18 | S 18 | S 16 |
Wave Graph | |||||||||||||||||||||
81 | 80 | 107 | 115 | 99 | 148 | 207 | 201 | 270 | 261 | 340 | 286 | 210 | 204 | 193 | 165 | 269 | 373 | 515 | 620 | 890 | |
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 | cross-off |
High Tide | 11:24AM0.60m | 9:30PM0.22m | 12:27PM0.67m | 11:32PM0.19m | 1:22PM0.73m | 00:59AM0.19m | 2:10PM0.78m | 2:02AM0.22m | 2:54PM0.80m | 2:55AM0.26m | 3:35PM0.79m | 3:43AM0.31m | 4:13PM0.75m | 4:30AM0.36m | |||||||
Low Tide | 7:39PM0.21m | 4:08AM0.02m | 8:34PM0.16m | 5:14AM0.01m | 9:09PM0.12m | 6:20AM-0.01m | 9:40PM0.08m | 7:20AM-0.02m | 10:10PM0.06m | 8:15AM-0.02m | 10:40PM0.05m | 9:08AM-0.00m | 11:08PM0.04m | ||||||||
6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 7:07 | — | — | 7:06 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 26 | 26 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 26 | 25 | 25 | 24 | 24 | 24 | 24 | 23 | 23 | 24 | 24 | 24 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | SW 14 | ENE 7 | NE 7 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 12 | SSW 16 | ENE 8 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 |
59 | 42 | 102 | 21 | 25 | 105 | 113 | 101 | 99 | 159 | 86 | 198 | 210 | 176 | 186 | 165 | 269 | 243 | 515 | 620 | 890 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 14 | S 11 | SSW 14 | SSW 14 | SSW 19 | SW 18 | SW 18 | SW 18 | SSW 13 | SSW 16 | SSW 12 | SSW 15 | SSW 11 | SSE 9 | SSE 9 | SSE 9 | S 20 | SSW 13 | SSW 13 | SSE 9 |
81 | 80 | 21 | 77 | 73 | 148 | 162 | 154 | 150 | 96 | 102 | 56 | 184 | 42 | 32 | 30 | 29 | 373 | 218 | 218 | 8 | |
Swell 3 Height (m) Direction Period (s) | SSE 11 | S 11 | NNW 7 | SW 21 | SW 20 | NE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSW 18 | SSE 10 | SSW 12 | SSE 10 | SSW 11 | SSW 11 | S 21 | W 13 | SSE 9 | W 12 | W 12 |
25 | 22 | 5 | 115 | 99 | 30 | 18 | 19 | 19 | 19 | 102 | 19 | 56 | 35 | 23 | 40 | 79 | 30 | 15 | 11 | 11 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 8 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 |
53 | 50 | 107 | 35 | 46 | 135 | 207 | 201 | 270 | 261 | 340 | 286 | 77 | 204 | 193 | 160 | 167 | 139 | 111 | 93 | 122 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 30 | 1 | 1 | 30 | 30 | 30 | 32 | 39 | 32 | 30 | 31 | 30 | 30 | 1 | 2 | 30 | 2 | 2 | 30 | 30 | 30 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Rockpiles Surf forecast
The above surf forecast table for Rockpiles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rockpiles can be found by selecting the local surf guide option on the grey menu. Our Rockpiles 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 (Rockpiles) 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 Rockpiles 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.
Rockpiles is 4 km (2 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.











