Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 1 am 13 Aug 2026 (local time)

Forecast update in  hr  min

Today's Rockpiles sea temperature is
27.2° C
0.5° 

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


Rockpiles surf forecast from 13 Aug 2026:

  • Most powerful swell: Sunday 16 Aug, 5AM (local time) - 13ft (4.0m), 10s period, E swell with 2,980 kJ wave energy.

Best Forecast Surf Conditions for Rockpiles this week:

The most powerful waves expected at Rockpiles in the next 16 days are 4.0m 10s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 7s period and expected on Thursday (Aug 20) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5AM (Sun 16th Aug)13ft (4.0m) 10s

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


The Lowdown

Alright, this is Rusty, and I’m looking at the outlook for Rockpiles.

To be straight with you, the next 16 days have a lot of noise. The whole run is plagued by a persistent ENE cross-off wind that shows up as a fresh breeze most days, pushing between 22 and 31 mph at times. That’s our biggest problem – it’s never fully offshore from the optimum SSE direction, so the surf is always fighting that ripping wind. For a reef break like this, that cross-off angle can make things bumpy and hard to ride.

The best bet in the whole window is the first bit of surf we get. Starting on Thursday morning, the 13th of August, we’ve got a clean 3 ft swell rolling in from the south with a very long 16-second period. That long-period groundswell carries a lot of energy (847), which is moderate but punchy. Water temp is about average for this time of year, nothing crazy. The catch? That ENE wind is still up at 22 mph, so it’s cross-off, not glassy. It’s marginal due to wind and tide, but this is the cleanest and most rideable the wave is going to be for a while. For a bigger day, Friday afternoon the 14th shows a 7 ft ENE swell but with that onshore angle and short 8-second period, it turns into a messy, choppy mess – not our friend.

If you’re a strong paddler and you don't mind a battle with the wind, those first couple of days might be worth a look. But honestly, after that, the whole middle two weeks are a write-off: either too much wind with waves over 8 ft that are only for experts (like the 12 ft on Saturday the 15th), or tiny, weak swells under 3 ft with poor conditions. There’s a long gap with no solid recommendations as the swell tries to switch directions but never lines up with the wind.

The only other flicker of hope comes right at the end of the forecast, on Friday morning the 28th of August. It’s still a ways out, so don’t hold your breath, but we see a 7 ft ENE swell with a short period of 7 seconds and moderate energy (634). The wind is still cross-off at 22 mph, so it’s a marginal call at best. Down the line, that’s the only other session that might produce a half-decent wave, but it’s a long wait and it’s far from guaranteed.

Bottom line: Thursday morning the 13th is your standout. The south swell has the quality, the period is there, and the surf is clean, even if the wind is strong. After that, it’s a long, dry spell with mostly poor surf. For the second week, don’t book your travel – it’s all small, windy, and not worth the paddle out.

Stay tuned, things change. I’ll be here if they do.

Rusty

Short Range Forecast

Mostly dry. Warm (max 27°C on Thu morning, min 25°C on Thu night). Mainly strong winds.

Days 4-6 Weather Summary

Heavy rain (total 22mm), heaviest during Sun afternoon. Warm (max 26°C on Sun morning, min 25°C on Sun afternoon). Winds decreasing (near gales from the ENE on Sun morning, moderate winds from the ENE by Mon afternoon).

Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
2
0
1
1
0
0
2
0
1
1
1
2
0
0
0
0
0
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
S
16
1.2
S
15
1.1
S
15
2.2
ENE
8
2.1
ENE
8
3
ENE
8
3.5
E
9
4
E
9
4
E
9
4
E
9
2.5
ENE
9
2.1
ENE
8
1.8
ENE
8
0.8
S
14
1.5
ENE
7
1.3
ENE
7
1.3
ENE
7
1.3
ENE
7
1.2
ENE
7
1
ENE
8
0.5
SW
16
Wave Graph
Metric surfscale
Energy kJ
501
662
537
526
536
946
1747
2353
2857
2424
1033
561
358
268
225
165
154
158
135
133
129
Wind (km/h)
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
40
NE
45
ENE
50
ENE
45
ENE
55
ENE
40
ENE
30
ENE
25
ENE
20
ENE
30
ENE
35
ENE
30
ENE
25
ENE
25
ENE
20
ENE
20
NE
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
4:48PM0.69m
5:17AM0.40m
5:22PM0.62m
6:06AM0.44m
5:54PM0.53m
6:57AM0.47m
6:24PM0.45m
7:54AM0.49m
6:52PM0.37m
8:59AM0.51m
7:16PM0.30m
10:13AM0.53m
Low Tide
9:58AM0.03m
11:36PM0.04m
10:49AM0.08m
00:03AM0.04m
11:43AM0.14m
00:30AM0.05m
12:43PM0.20m
00:58AM0.06m
1:59PM0.25m
1:27AM0.08m
3:56PM0.27m
2:01AM0.10m
2:47AM0.12m
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
mod rain
thunderstorm
thunderstorm
thunderstorm
rain showers
clear
clear
part cloud
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:09
6:09
6:09
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:01
7:00
7:00
7:00
6:59
6:58
 mm
8
6
5
2
1
Temp °C
27
27
26
26
26
26
26
26
26
26
26
26
26
26
25
26
26
25
26
26
25
Feels °C
24
24
24
22
23
23
23
22
22
21
23
23
27
26
24
23
24
24
25
25
25
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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