Rockpiles surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 7 am Thursday 21 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Rockpiles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Rockpiles sea temperature is
25.8° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Rockpiles this week:

The most powerful waves expected at Rockpiles in the next 16 days are 3.0m 8s and forecast to arrive on Thursday (May 21) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Thursday (May 28) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Thu 21st May)10ft (3.0m) 8s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 24°C on Thu afternoon, min 22°C on Fri night). Mainly strong winds.

Days 4-6 Weather Summary

Some drizzle, heaviest during Tue night. Warm (max 24°C on Sun morning, min 23°C on Sun morning). Mainly strong winds.

Thursday
21
Friday
22
Saturday
23
Sunday
24
Monday
25
Tuesday
26
Wednesday
27
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
1
1
1
1
1
0
0
0
0
0
0
1
0
0
1
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
ENE
8
3
ENE
8
3
ENE
9
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.3
ENE
8
2.2
ENE
8
2.3
ENE
8
2.2
ENE
8
2.1
ENE
8
2.2
ENE
8
2.2
ENE
7
2.3
ENE
7
2.1
ENE
7
2
ENE
8
1.9
ENE
7
1.7
ENE
7
1.3
E
7
Wave Graph
Metric surfscale
Energy kJ
1051
1173
1150
977
829
979
897
931
748
667
713
659
555
531
516
545
475
447
379
279
168
Wind (km/h)
45
ENE
45
ENE
40
ENE
40
ENE
45
ENE
35
ENE
45
ENE
40
ENE
35
ENE
35
ENE
40
ENE
40
ENE
40
ENE
40
ENE
35
ENE
40
ENE
35
ENE
35
ENE
35
ENE
35
ENE
30
ENE
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
8:55AM0.12m
8:43PM0.58m
10:30AM0.18m
9:37PM0.51m
11:42AM0.26m
10:30PM0.44m
12:35PM0.34m
11:20PM0.37m
1:17PM0.42m
00:06AM0.30m
1:54PM0.49m
00:50AM0.25m
2:27PM0.55m
1:31AM0.21m
Low Tide
12:55PM0.05m
4:33AM-0.04m
2:25PM0.11m
5:12AM-0.05m
4:11PM0.16m
5:45AM-0.05m
5:51PM0.17m
6:13AM-0.06m
7:16PM0.16m
6:39AM-0.06m
8:25PM0.13m
7:03AM-0.06m
9:23PM0.11m
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
rain showers
rain showers
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:50
5:50
5:50
5:50
5:48
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:04
7:05
7:05
7:06
7:06
7:07
7:07
1
2
Temp °C
23
24
23
23
24
23
23
23
23
24
24
23
24
24
23
24
24
23
24
24
24
17
18
17
18
19
18
18
17
18
20
19
18
19
19
19
19
20
19
20
19
21
Swell 1
Height (m)
Direction
Period (s)
0.4
SSW
16
0.5
S
16
0.5
S
15
0.5
S
14
0.4
SSW
14
0.5
S
16
0.5
S
16
0.6
S
15
0.6
S
15
0.5
S
14
0.5
S
14
0.5
S
14
0.5
S
14
0.5
S
13
0.5
S
13
0.5
S
16
0.4
S
12
0.6
S
15
0.6
S
14
0.5
S
13
1.3
E
7
Energy kJ
87
127
110
107
62
130
125
159
155
93
93
99
97
85
84
124
47
150
142
88
168
Swell 2
Height (m)
Direction
Period (s)
0.4
SSW
13
0.2
SSE
13
0.3
SSE
13
0.3
S
18
0.4
S
18
0.4
SSW
13
0.3
SSW
13
0.3
NNW
15
0.4
NW
14
0.4
NW
12
0.4
NW
12
0.3
NW
11
0.2
NNW
11
0.2
NNW
11
0.1
NW
10
0.1
NW
10
0.3
S
16
0.4
NW
16
0.4
NW
14
0.4
NW
13
0.9
NNE
7
Energy kJ
60
17
32
57
98
60
34
44
46
39
37
20
12
11
4
4
45
86
70
63
93
Swell 3
Height (m)
Direction
Period (s)
0.2
SSE
13
0.2
SSW
12
0.2
SSW
12
0.3
SSE
12
0.2
SSE
12
0.2
SSE
12
0.2
SSE
12
0.2
SSE
12
0.2
SSE
11
0.3
S
16
0.3
S
16
0.1
SW
20
0.1
SW
20
0.1
SW
19
0.1
SW
18
0.2
NNW
18
0.2
SSE
9
0.1
SE
8
0.3
SSE
8
0.5
S
13
Energy kJ
17
14
14
29
14
14
14
14
12
46
46
16
15
15
12
31
8
3
13
84
Wind waves
Height (m)
Direction
Period (s)
3
ENE
8
3
ENE
8
3
ENE
9
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.5
ENE
8
2.3
ENE
8
2.2
ENE
8
2.3
ENE
8
2.2
ENE
8
2.1
ENE
8
2.2
ENE
8
2.2
ENE
7
2.3
ENE
7
2.1
ENE
7
2
ENE
8
1.9
ENE
7
1.7
ENE
7
Energy kJ
1051
1173
1150
977
829
979
897
931
748
667
713
659
555
531
516
545
475
447
379
279
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
Distance (km)
129
130
127
157
200
127
130
130
38
41
127
41
130
127
44
148
127
31
38
39
30
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
2
3
3
2
2
Best forecast wave conditions in United States
Rating
(10 max)
4
2
2
3
3
2
3
2
2
2
1
3
2
1
3
2
2
4
3
2
4
Header Global
Rating
(10 max)
5
7
6
5
6
8
5
5
6
5
5
4
4
5
5
5
5
5
9
8
9
  • 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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