Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 1 am 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Rockpiles sea temperature is
27.1°C
0.3° 

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


Rockpiles surf forecast from 30 Aug 2026:

  • Most powerful swell: Friday 4 Sep, 11PM (local time) - 13ft (4.0m), 9s period, ENE swell with 2,517 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 9s and forecast to arrive on Friday (Sep 04) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Fri 4th Sep)13ft (4.0m) 9s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s cookin’ for the next couple of weeks.

Right off the bat, we’ve got a bit of a slow start. The surf is just not cooperating through Sunday, Monday, and Tuesday – poor conditions and weak, short-period windswell from the ENE. The wave energy is moderate at best, bouncing around 646 to 878 on the energy scale, but the quality is junk. You’re better off staying home or finding something else to do.

Things begin to look a little more interesting on Wednesday the 2nd of September. We get a long-period groundswell from the S with a 16-second period, which is a nice change, but the swell is small – only 3ft to 3ft. The energy is moderate (888), and the wind is cross-off from the ENE at 22 mph, so it’ll be clean. But it’s marginal, and the tide might mess with it. Still, that long period means better shape and more push for the size, so if you’ve got a log, you might find something there.

After that, we hit another rough patch Thursday and Friday – more poor to marginal conditions with stronger winds and lumpy surf. Then on Friday the 4th of September, the swell jumps up to 10ft in the morning and 12ft in the afternoon, but the energy is high (1250 to 1889), and the wind is howling at 28 mph. That’s not good for surfing – too big, too windy, and the period is short at 8 seconds. This setup looks more interesting for kite surfing than paddle surfing, honestly.

The weekend of the 5th and 6th of September brings some hope. Saturday morning has an 8ft swell from the ENE with 9-second period, and the wind goes cross-shore from the E at 19 mph, but there’s a risk of thunderstorms and the surf is lumpy. By afternoon, the wind drops to a gentle breeze from the ESE, and the swell drops to 7ft, making it a bit more manageable. The energy is still strong (1059). It’s marginal, but if you’re keen, it might be worth a paddle.

Sunday the 6th of September is the standout for the first week. We’ve got a 7ft ENE swell with a 12-second period – that’s a nice groundswell. The energy is strong (1355 to 1470), and the wind is cross-off from the ENE at 22 mph, keeping things clean. Rockpiles is a reef break, so that long-period groundswell will wrap in nicely, and with the offshore wind, it’ll be glassy. This is your best bet for the next week – good size, clean, and the swell direction matches the optimum from the SSE beautifully. The water is a warm 81°F, which is about average for this time of year, so no need for a thick suit.

The following week gets a bit wild. Monday the 7th of September has an 8ft to 13ft ENE swell with 12-second period, and the energy is massive (2639 to 4946). The wind is strong from the ENE and NE, so it’s cross-off but blowing hard. That’s expert territory only – too big for most, and the crowd at Rockpiles can be an issue when it’s good. Tuesday the 8th of September brings a 10ft swell in the morning with offshore wind from the N at 25 mph, making it clean but very hard to paddle into. The afternoon sees lighter wind but a cross-on component, so it’s not ideal.

Wednesday the 9th of September through to the end of the forecast is a drop-off. The swell fades from 7ft down to 2ft, and the energy weakens. The long-period SW groundswell on Sunday the 13th of September is tiny (2ft, 16-second period), but it’s clean. Still, not worth the drive.

So, to wrap it up: the best surf on offer is Sunday the 6th of September at Rockpiles. That ENE groundswell with 12-second period, cross-off wind, and 7ft waves will be clean and fun. If you’re an expert, Monday the 7th of September might be worth a look, but it’s big and windy. The rest is marginal or poor. Keep your expectations in check.

Rusty out.

Short Range Forecast

Mostly dry. Warm (max 26°C on Sun morning, min 25°C on Sun morning). Mainly strong winds.

Days 4-6 Weather Summary

Light rain (total 6mm), mostly falling on Fri night. Warm (max 27°C on Wed afternoon, min 25°C on Wed night). Winds increasing (moderate winds from the ENE on Wed night, near gales from the ENE by Fri night).

Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
0
1
1
1
1
2
1
1
1
0
0
0
1
0
0
1
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
ENE
7
1.8
ENE
7
1.7
ENE
7
1.9
ENE
7
1.9
ENE
8
1.9
ENE
8
1.8
ENE
8
1.8
ENE
8
2.2
ENE
8
0.9
S
16
0.8
S
16
0.8
S
15
1.6
ENE
7
1.9
ENE
7
2.2
ENE
8
3
ENE
8
3.5
ENE
8
3.5
E
9
2.5
ENE
9
2.2
ENE
8
1.9
ENE
8
Wave Graph
Metric surfscale
Energy kJ
381
325
256
369
410
400
414
435
585
422
318
280
280
366
540
976
1657
2136
1004
660
463
Wind (km/h)
40
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
25
ENE
35
ENE
35
ENE
30
ENE
40
ENE
40
NE
45
ENE
45
NE
45
ENE
50
ENE
30
E
15
ESE
25
ENE
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
cross
cross-off
High Tide
5:18PM0.51m
6:18AM0.53m
5:48PM0.44m
7:14AM0.56m
6:20PM0.36m
8:21AM0.59m
6:54PM0.28m
9:39AM0.62m
7:57PM0.22m
10:58AM0.66m
10:35PM0.19m
12:05PM0.69m
00:18AM0.21m
Low Tide
11:22AM0.14m
11:42PM0.05m
12:22PM0.19m
00:10AM0.05m
1:40PM0.23m
00:43AM0.05m
3:38PM0.25m
1:25AM0.06m
6:22PM0.22m
2:24AM0.08m
7:30PM0.17m
3:46AM0.09m
8:03PM0.13m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
mod rain
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:13
6:13
6:15
6:15
6:15
6:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:49
6:47
6:46
6:45
6:45
6:44
6:44
 mm
6
5
2
2
Temp °C
26
26
26
26
26
25
26
26
25
26
27
26
26
26
25
26
26
25
26
27
26
Feels °C
22
23
24
23
24
22
24
23
22
25
25
25
23
22
21
21
21
20
26
29
27
  • 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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