
Surf Forecasts:
Rockpiles surf forecast from 7 Aug 2026:
- Most powerful swell: Thursday 13 Aug, 2AM (local time) - 4ft (1.2m), 16s period, S swell with 762 kJ wave energy.
Best Forecast Surf Conditions for Rockpiles this week:
The most powerful waves expected at Rockpiles in the next 16 days are 1.2m 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 1.5m 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) | 4ft (1.2m) 16s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at the outlook for Rockpiles over the next couple of weeks. It’s a reef break, pretty consistent, and it takes a south-southeast swell best. The water temp is sitting at a normal 81°, nothing unusual there for this time of year.
Right off the bat, there’s a bit of a flat spell. For the first few days, from Thursday the 6th through to Friday the 7th, we’ve got tiny swell. You’re looking at a weak 1 ft from the south-southwest with moderate cross-off breezes. The wave energy is pretty low (145), so honestly, don’t bother paddling out. The forecast is calling it poor, and I agree.
Things start to pick up a little from Saturday the 8th into the middle of the following week, but it’s a mixed bag. The swell jumps to 5 ft to 6 ft from the east-northeast, but the period is short, around 6 to 8 seconds, meaning weak, chop-prone waves. The wind stays cross-off, which is okay, but the energy, though moderate (between 476 and 624), is just producing messy, marginal waves. The conditions are "marginal at best," and the calls for the 8th through the 11th are mainly "questionable tide conditions" or "poor." You could maybe find a rogue wave, but it’s not worth getting excited about.
Now, here is the one stand-out window in the whole forecast. Wednesday the 12th and Thursday the 13th of August. The swell switches up, dropping in height to around 3 ft to 4 ft, but the period stretches out to 15 to 18 seconds from the south. That’s proper long-period groundswell. The combined energy is strong, hitting between 833 and 924. This is the sort of energy that will wrap nicely into a reef like Rockpiles. The wind stays a moderate cross-off, so expect clean, lined-up waves. This is the best on offer, without a doubt. A reef break with that long-period south swell and cross-off wind is a recipe for some tidy, rippable walls. Just keep an eye on the tide.
After that little burst of quality, we slip back into less ideal stuff. Friday the 14th through Tuesday the 18th of August, the swell size climbs again, between 7 ft and 8 ft, but it’s back to that short-period east-northeast windswell (6 to 8 seconds). The energy is still strong numerically (up to 879), but the waves will be lumpy and unruly. At that size with those conditions, Rockpiles could get pretty gnarly and is definitely only for the experts who know what they’re doing. The winds are stronger too, a stiff to strong breeze out of the east-northeast, so it'll be a bit of a battle.
The final days (19th of August to the 21st of August) see the size drop back down to a smaller, cleaner-looking long-period swell from the southwest, with moderate energy (415 up to 734). It’s still rated as marginal, so not the main event, but a better option than the big messy stuff.
If you only have one window to make a move, target that Wednesday 12th and Thursday 13th south swell. That’s your gold.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu afternoon, min 25°C on Thu night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Tue afternoon, min 25°C on Sun night). Mainly fresh winds. | |||||||||||||||||||
Thu 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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 | ENE 8 | SW 21 | SW 20 | ENE 6 | SW 18 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 |
Wave Graph | ||||||||||||||||||||
80 | 107 | 115 | 99 | 148 | 183 | 232 | 278 | 261 | 334 | 340 | 292 | 244 | 215 | 188 | 269 | 276 | 509 | 498 | 762 | |
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 | 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 | |||||||
— | — | 6:07 | — | — | 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 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 25 | 26 | 26 | 26 |
Feels °C | 24 | 25 | 25 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 26 | 25 | 25 | 25 | 26 | 24 | 23 | 23 | 25 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | SW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 12 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 |
43 | 102 | 77 | 73 | 105 | 113 | 101 | 99 | 159 | 86 | 198 | 184 | 234 | 186 | 165 | 269 | 243 | 509 | 498 | 762 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSE 11 | SW 21 | SW 20 | SSW 19 | SW 18 | SW 18 | SW 18 | SSW 13 | SSW 16 | SSW 12 | SSW 12 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | S 20 | SSW 13 | SSW 13 | W 12 |
80 | 40 | 115 | 99 | 148 | 162 | 154 | 150 | 96 | 102 | 56 | 56 | 34 | 32 | 31 | 27 | 276 | 218 | 218 | 11 | |
Swell 3 Height (m) Direction Period (s) | S 11 | NNW 7 | SSE 11 | S 11 | S 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSW 18 | SSE 10 | SSE 10 | SSW 11 | SSW 11 | SSW 11 | S 21 | SSE 8 | SSE 8 | W 12 | SSE 9 |
22 | 5 | 23 | 20 | 21 | 18 | 19 | 19 | 19 | 102 | 19 | 19 | 42 | 23 | 40 | 79 | 14 | 14 | 25 | 8 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 8 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 |
53 | 107 | 49 | 59 | 146 | 183 | 232 | 278 | 261 | 334 | 340 | 292 | 244 | 215 | 188 | 163 | 147 | 123 | 125 | 182 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 3 | 1 | 1 | 31 | 30 | 32 | 38 | 31 | 30 | 32 | 30 | 30 | 30 | 1 | 30 | 1 | 3 | 30 | 38 | 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.











